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Minning Maintenance Realibility | Distributor Cone
The distributor cone is mounted directly below the feed well. The purpose of the distributor cone is to distribute flocculated slurry to the outside edge of the tank.
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Minning Maintenance Realibility | Overflow Arrangements
Clarified effluent typically is removed in a peripheral launder located inside or outside the tank. The effluent enters the launder by overflowing a 'V' notch or level flat weir. Uneven overflow rates caused by wind blowing across the liquid surface in large thickeners can be better controlled whe... |
Minning Maintenance Realibility | Underflow Arrangements
Concentrated solids are removed from the thickener by use of a centrifugal slurry pump, positive displacement pump or by gravity. The underflow arrangement must be designed to remove solids, without plugging upsets, at the maximum rate at which they will enter the thickener.
Provisions must be ma... |
Minning Maintenance Realibility | Instrumentation
Instrumentation is used on most thickeners to measure torque in order to prevent mechanical damage to the drive or rake mechanism by actuating a rake lifting device or shutting off power to the drive in the event of an overload. Some applications also require automatic control of thickener feed or disch... |
Minning Maintenance Realibility | Thickener Operation Rules
INPUT minus OUTPUT equals ACCUMULATION.
Excessive accumulation results in operating problems, usually requiring shutdown and
If solids are allowed to accumulate in a thickener without corrective action, one or more of the following will occur:
The pulp will begin to exit the tank with the o... |
Minning Maintenance Realibility | HRT Control Systems
Briefly a HRT operates in the following way (see Fig 1): feed enters the feed well which is designed to promote deaeration and floc formation. If the feed has a high solids concentration, it is usually necessary to add dilution water to allow effective floc formation.
Flocculant is injected into the... |
Minning Maintenance Realibility | HRT Control System at Sunrise Dam Gold Mine
The control system installed in the SDGM thickener is shown in fig. 2 where the underflow density is controlled by a bed mass pressure probe and the flocculation rates controlled by a bed level probe. The control strategy based on bed mass is explained below. |
Minning Maintenance Realibility | Rittershaus & Blecher (R&B) pressure filters.
The Çayeli concentrator designed nameplate capacity was 600,000 tonnes per year. Originally, three Rittershaus & Blecher pressure filters were installed: one for copper concentrate, one for zinc concentrate, and one standby for both copper and zinc concentrates. Mill thro... |
Minning Maintenance Realibility | COMMISSIONING
After the usual pre-commissioning checks and dry runs, hot commissioning of the filter started on 19 August 2000. The filter exceeded its rated capacity after one month of operation. The current operational parameters are as follows:
Average Cycle Time: 11 minutes.
Average Number of Cycles: 120 per day.
A... |
Minning Maintenance Realibility | 6.2.1 Filter Plate Repairs
R&B filters: These filters require extensive maintenance on the plates for several reasons.
The plates undergo continuous wear on the seal surfaces due to the lack of a good seal. This is due to the absence of an auto cloth wash after each cycle.
The wear surfaces are repaired by plastic weld... |
Minning Maintenance Realibility | Slurry Pumps
CENTRIFUGAL SLURRY PUMPS AND SLURRY PUMPING SYSTEMS
It is very common in these same plants to use pulley and belt drives between motors and pumps. The main reason for this is that duties often change and mostly upwards after initial installation. If the pump speed is not sufficient, it is then only a m... |
Minning Maintenance Realibility | PUMP TYPES
Two types of pumps are used in the hydraulic transportation of solids: centrifugal pumps and positive displacement pumps.
Centrifugal pumps are used for flow rates from a few litres to thousands of litres per second, they can handle solid particle sizes from microscopic to large rocks up to 300 mm. Their mai... |
Minning Maintenance Realibility | PUMP SEALING
Associated with the impeller-throatbush seal face adjustment is the means of sealing the pump against leakage along the shaft. Most pumps still use the proven and versatile water-fed gland seal, which still provides the lowest sealing costs even though it requires reasonably frequent attention by the opera... |
Minning Maintenance Realibility | PUMP SPEED AND WEAR
Whenever we are dealing with centrifugal pumps we are of necessity involved with flow rates, total heads, consumed power and pump speeds. The first three parameters are closely related to the forth,
This example comes from a copper mine. The specific gravity of copper ore is S=2.85, the flow of slu... |
Minning Maintenance Realibility | WARMAN 10/8 T-AHPP gland sealed pumps.
Two trains of 7 stages. Tailings application. Rubber lined casings and high efficiency, hard-metal impellers.
Duty: Q=930 m3/h, Hm=55 m per stage, Cw=55%. Drives: 315 kW, 740 r/min motors, direct coupled. |
Minning Maintenance Realibility | ASH PUMP 22x20 SRH pumps.
Two trains of 3 stages (one train shown). Tailings application. Rubber lined casings and impellers.
Duty: Q=36005000 m3/h, Hm=2431 m per stage, Sm=1.21.3. Drives: 750 kW motors with gear reducers and Variable Frequency Speed Controllers. |
Minning Maintenance Realibility | WARMAN 20/18 TU-AH pumps.
One pump per processing circuit. Mill discharge application. Rubber lined casings, hard-metal impellers and throat bushes. Duty: Q=3200 m3/h, Hm=32.5 m, Cw=62%. Drives: 600 kW motors and gear reducers. |
Minning Maintenance Realibility | WARMAN 550 U-SHDU gland sealed pump.
Mill discharge application. Hard-metal pump casing and impeller; unlined. Duty: Q=5220m3/h, 37 m, Cw=72%
Drive: 1200 kW motor with Variable Frequency Speed Controller, direct coupled. |
Minning Maintenance Realibility | Diesel Electric Power Train in Hauling Trucks
Vibration Points Mining
Shovels
Motor Generator set
Hoist and swing transmission
Haulage trucks
Diesel engine
Generator
Concentrator
SAG / Ball mills
Pumps
Conveyors |
Minning Maintenance Realibility | Shovel Vibration Monitoring
There are a total of 13 electrically-powered shovels in operation at the mine, each with a 15 m3 bucket capacity.
These comprise; Bucyrus - Erie 295 B and 195 Bl, P&H 2100 BL and Marion 201 M. At present the shovel availability is approximately 65%. Vibration monitoring has played a major p... |
Minning Maintenance Realibility | Truck Vibration Monitoring
The truck fleet at the mine consists of a total of 41 Wabco, Terex and Unit Rig diesel-electric trucks, each with a capacity of 170 tons. The trucks are powered by a 1600 BHP diesel engine driving a DC generator, which in turn drives an electric motor mounted on each of the rear wheel-sets. ... |
Minning Maintenance Realibility | Concentrator Vibration Monitoring
The Autogeneous Mill
The autogeneous mills are 32 ft diameter cascade type grinding-mills, powered by two 3000 HP motors coupled by gearboxes, see Fig. 21. Because of their importance to the concentrator operation, they have number one priority in the plant. Vibration measurements at ... |
Minning Maintenance Realibility | The most common types of problem encountered are due to installation misalignment, bearing failures and gearing problems.
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Minning Maintenance Realibility | Carbon-in-leach Process
The CIL (Carbon in Leach) circuit is an intermediate stage in the production of gold. The process involves dissolving the solid gold particles into solution using a process know as cyanidation.
The dissolved gold in solution is adsorbed onto activated carbon. When the carbon is loaded with enoug... |
Minning Maintenance Realibility | The Cyanidation Reaction
CIL technology is based on the fact that the gold dissolves readily in cyanide solutions in the presence of oxygen, and the resultant gold cyanide complex ion (molecule) is readily adsorbed onto activated carbon. The goal of leaching is to push the reaction to the right ie; consume the reacta... |
Minning Maintenance Realibility | Factors Affecting the Rate of the Cyanidation Reaction
Size of Gold Particles
The gold must be in a fine particulate form (from the grinding circuit). The feed slurry must have an 80% passing size of 75um to achieve suitable gold recovery (refer to cyclone and grinding modules).
Free Cyanide Concentration
Increasing cy... |
Minning Maintenance Realibility | Carbon Adsorption Theory
After the leaching process is complete, the soluble gold must be concentrated and separated from the process slurry. The method of recovery of gold from the process slurry is by carbon adsorption. |
Minning Maintenance Realibility | Trash Screens
The overflow slurry stream from the cyclone nest feeds the CIL circuit via the leach feed thickener. Before entering the leaching circuit, all the wood fibre, cloth, plastic, rocks from cyclone blowouts and other trash material must be removed from the slurry. If trash is not removed it may block the CIL ... |
Minning Maintenance Realibility | Leach Feed Thickener
Slurry from the trash screens flows into the thickener feed hopper. The slurry is pumped from the hopper to the thickener where the slurry is flocculated and thickened to a density of 50% solids. The thickener underflow reports to a hopper from which the slurry is then pumped to the leach feed spli... |
Minning Maintenance Realibility | CIL Tanks
The major component of the CIL circuit are the two, seven tank leaching trains. The eastern, first train of tanks (train no.1, tanks 1 to 7) were part of the original plant. The western, second train of tanks (train no.2, tanks 101 to 107) was commissioned as part of the stage three plant expansion, and is ve... |
Minning Maintenance Realibility | Intertank Screens
Screens are fitted in each of the CIL tanks to retain the carbon in the tank, as the circuit operates with carbon being moved counter-current to slurry flow. The screens are cylindrical and are fitted just prior to the slurry exit launder. Wiper blades with a dedicated drive motor system are installed... |
Minning Maintenance Realibility | Carbon Forwarding Pumps
To facilitate the counter current movement of carbon, each CIL tank has a carbon-forwarding pump.
The pumps are run on a batch schedule as required to maintain the desired carbon concentrations in the tanks. The forwarding pump from tanks 2 and 102 pumps to the loaded carbon screen where the car... |
Minning Maintenance Realibility | Carbon Safety Screens
Both of the CIL trains each have a carbon safety screen over which the tail slurry from tanks 7/107 is passed.
Carbon may be present in the tailings slurry due to either:
The carbon has abraded over time and is fine enough to pass the intertank screen.
The intertank screen is holed.
The seal betwe... |
Minning Maintenance Realibility | TAC Cyanide Analyser
The TAC analyser is an automatic titration unit that measures the cyanide concentration and pH of the slurry. A slurry sample from the splitter box is taken through a filtration sock and is sent by a peristaltic pump to the analyser unit. The filtered sample is titrated with silver nitrate to deter... |
Minning Maintenance Realibility | Debex Carbon Meter
Each CIL tank is fitted with a Debex carbon meter. The meter measures the carbon concentration in the slurry. It works by sending an ultrasonic signal through the slurry, and from the loss of signal energy over the detection gap, determines the carbon concentration. The Debex system also incorporates... |
Minning Maintenance Realibility | Leach Feed Slurry Autosampler
An autosampler intermittently takes a cut of the feed to the trash screens. The sample collects in a bucket that is removed daily by the laboratory technician. |
Minning Maintenance Realibility | Tailings Slurry Autosampler
An autosampler placed prior to each carbon safety screen takes a periodic cut of the tailings slurry from each train. |
Minning Maintenance Realibility | Waste Water Treatment
The systems treatment stages include: a
Sedimentation
Dissolved air flotation
Media filtration
Activated carbon filtration
Ultrafiltration
Reverse osmosis.
In the sedimentation process, the suspended solids in the water are gravity settled. Then, through dissolved air flotation, various colloid... |
Minning Projects | Grinding Mills
Part of the concentration plant, the grinding or tumbling mill is a large-scale grinding device (see Figure 2) used in mineral processing to grind large chunks of ore into a suitable size for the next step in the concentration process. A similar setup is used in the cement industry for crushing clinker.
... |
Minning Projects | Al Masane Al Kobra Mining Company is a precious metals and base metals developer focused on the completion and production of the 700,000 tpa copper, zinc and precious metals Al Masane Mine in Saudi Arabia. The Al Masane Project is fully funded and permitted. As of mid 2010, the surface facilities were completed and wai... |
Minning Projects | Al Masane Geology and Mineralization
Three mineralized zones with massive sulfide mineable reserves have been discovered to date and outlined by 45,000 meters of diamond drilling from the surface and underground tunnels. The principal sulfide minerals in all the zones are pyrite, sphalerite, and chalcopyrite. The preci... |
Minning Projects | Maaden Phosphate Development
Office: Al-Khobar, Melbourne, Beijing, Abu Dhabi
Customer: Saudi Arabian Mining Company
Location: Al-Jalamid and Raz Az Zawr, Saudi Arabia
Timeframe: 2006 - ongoing
The Maaden Phosphate Development located in Saudi Arabia is one of the worlds largest producers of di-ammonium phos... |
Minning Projects | Phosphate
Phosphate is one of the most significant products of Maaden as it is made naturally of phosphorus element. It is one of three main nutrition elements in the photosynthesis and is key element of the growth of agricultural crops.
According to the Food and Agriculture Organization (FAO) of the United Nations, t... |
Minning Projects | Ma'aden Phosphate Company (MPC)
With an investment of USD 5.5 Billion (SAR 21 Billion), MPC is a joint venture between Maaden and Saudi Basic Industries Corporation (SABIC), who share 70% and 30% respectively, with total production capacity of 3 Million TPA of DAP, MAP, and NP's. Each year, Maaden markets about 70% of ... |
Minning Projects | Ore beneficiation plant
In the mining industry beneficiation or benefication in extractive metallurgy, is any process that improves (benefits) the economic value of the ore by removing the gangue minerals, which results in a higher grade product (concentrate) and a waste stream (tailings). Exemplary beneficiation proce... |
Minning Projects | Flotation Cells
The froth flotation process is commonly employed for the selective separation of a mineral species from a liquid solid suspension of both valuable and unwanted gangue mineral particles
A mechanical flotation cell essentially consists of a vessel or a tank fitted with an impeller or rotor. The impeller ... |
Minning Projects | Size Control
Size control is the tool for improvement of the size fractions in the process stages and in the final products. For the coarser part of the process, screens are used (in practise above 1-2 mm). In the finer part we have to use classification with spiral classifiers, see section 4. |
Minning Projects | Secondary crusher Type
In a rock crushing circuit, the second stage normally starts to be of importance for control of size and shape. Because of this the jaw crusher, in most cases, is disqualified as secondary crusher.
Instead the cone crusher is used more frequently. Also in comminution (crushing and grinding) cir... |
Minning Projects | Final crushing stage More than just crushing
For many rock and gravel crushing circuits the final crushing stage is of special interest. The final sizing and shaping will take place in this stage influencing the value of the final product.
For hard, abrasive rock circuits Cone crushers, Vertical Shaft Impactors (VSI)... |
Minning Projects | VSI A rock on rock autogeneous crushing impactor
Horizontal impactors normally use rock to metal impaction. This means a restriction in crushing circuits with hard feed material, when wear can be dramatically high.
The VSI Impactor of Barmac type is using a rock-to-rock impaction technology where most of the design i... |
Minning Projects | High Pressure Grinding Rolls (HPGRs) - HRC
HPGRs utilize two counter-rotating tires one fixed and one floating in order to effectively crush ore. Hydraulic cylinders apply very high pressure to the system, causing inter-particle comminution as the feed travels between the two tires.
The basic operating principle b... |
Minning Projects | rinding Introduction
Size reduction by crushing has a size limitation for the final products. If we require further reduction, say below 5-20 mm, we have to use the processes of grinding. Grinding is a powdering or pulverizing process using the rock mechanical forces of impaction, compression, shearing and attrition
... |
Minning Projects | Semi Autogenous (SAG) mill
Wet or dry Higher capacity than A-G mill grinding Primary, coarse grinding (up to 400 mm feed size) Grinding media is grinding feed plus 4-18% ball charge (ball dia.100-125 mm) High capacity (short retention time) Less sensitive to feed composition (critical size material), see... |
Minning Projects | Size Control
In mineral processing practices we have two methods dominating size control processes:
Screening using a geometrical pattern for size control
Classification using particle motion for size control
There are many types of screens, but they can be reduced to the four types shown below. |
Minning Projects | Classification Introduction
For size control of particles finer than 1 mm, we are moving out of the practical range of conventional screens. Classification is the process of separating particles by size into two or more products according to their behaviour in air or water (liquids).
Classification methods
Wet clas... |
Minning Projects | Hydrocyclone
Centrifugal forces classify solids by size (mass). High mass particles closer to outer wall reporting to underflow. Low mass particles closer to the centre reporting to overflow.
Hydrocyclone design
1. Vortex finder 2. Inlet head 3. Spigots (apex) 4. Overflow elbow 5. Feed inlet 6. Barrel 7. Cones 8. Cone... |
Minning Projects | Spiral classifier
By combining a gravity settler of rectangular section with a sloped transport spiral for the sediment we have a spiral classifier |
Minning Projects | Enrichment Washing
Washing, mainly used in the enrichment process of industrial minerals, coal, aggregates, sand and gravel, normally with the products in solid form (size = 1 mm and coarser)
Separation, mainly used in the enrichment processes of metallic minerals and high value industrial minerals, normally with... |
Minning Projects | Tumbling scrubber
If solids of rock, gravel or minerals contain a high and sticky content of clay and dirt that has to be removed, wet screening is normally not effective enough. A medium speed washing drum for scrubbing solids against solids is then the option. The drum is relatively short in relation to its diameter.... |
Minning Projects | Attrition scrubber
These scrubbers are mainly used for washing of material below 10 mm in size. Very high energy inputs are possibly used for washing of silica sand for glass making and cleaning of foundry sand. The machine is also suitable for clay blunging and lime slaking, |
Minning Projects | Wash water treatment closed system
After recovery of coarser material the fines can be treated in a closed system recovering all process water and bringing the fine solids into a transportable form. |
Minning Projects | Enrichment Separation
Most value minerals (both metallic and industrial) are priced by their purity. After liberation by size reduction and size control all minerals are free to be separated from each other.
Depending on the properties of the individual minerals they can be recovered by different methods of separatio... |
Minning Projects | Upgrading
After the enrichment operation we end up with a value product (concentrate) and a non-value product (tailings). These products are probably not sellable nor disposable due to the content of process water, particle size, or chemical composition.
By upgrading we mean the methods of increasing the value of these... |
Minning Projects | Separation by shaking tables
A cross stream of water transports material over the table to riffles running perpendicular to the direction of feed. Particles build up behind each riffle and stratification occurs with heavier particles sinking to the bottom. The light particles are carried over each riffle to the tailing... |
Minning Projects | Separation by flotation
Flotation is a mineral separation process, which takes place in a water-mineral slurry. The surfaces of selected minerals are made hydrophobic (water-repellent) by conditioning with selective reagents. The hydrophobic particles become attached to air bubbles that are introduced into the pulp and... |
Minning Projects | Flotation circuit layout
Flotation circuit designs vary in complexity depending primarily on the type of mineral, degree of liberation of valuable minerals, grade (purity) of the product and the value of the product. |
Minning Projects | Reactor cell flotation system (RCS)
The RCSTM (Reactor Cell System) flotation machine utilizes the patent protected DVTM (Deep Vane) mechanism. Flow pattern characteristics are |
Minning Projects | DR Flotation cell system
The Reactor Cell System Flotation Machine is the preferred choice for many mineral flotation applications. The DR design may be specified for certain applications, particularly where de-slimed coarse particles have to be handled such as in glass and potash processing. Features of the DR design ... |
Minning Projects | Column flotation cells
Column flotation cells, like mechanical cells, are used to perform mineral separations. Column cells do not use mechanical agitation (impellers). Instead, mixing is achieved by the turbulence provided by the rising bubbles. Columns are mostly used to produce final grade concentrates because they ... |
Minning Projects | Sedimentation
Sedimentation is a continuous solid-liquid separation process with settling of solids by gravity.
Clarification is the process for removal of solids from a dilute solid/liquid suspension.
Thickening is the process for concentrating particles in a supension by gravity compression |
Minning Projects | Flocculation
All sedimentation technologies are related to particle size. One way of improving the settling speed generally is therefore to increase the size of the particles. Fine particles can be connected together by coagulation or flocculation. The settling rate of the combined particles will be higher than that of... |
Minning Projects | Flocculation system
A handling system is needed for flocculent utilisation. This comprises provision to mix, store and dilute the polymer. The dilute polymer is then mixed with the feed slurry and allowed to condition (or age) before a sedimentation or dewatering process. |
Minning Projects | Conventional clarifier
Clarification is achieved when the liquid upstream velocity VL (rise rate) is lower than the sedimentation velocity of the solids VS |
Minning Projects | Conventional clarifier sizing
Clarifier diameter is selected to give a suitable upstream velocity (m/h). Sizing is usally done using Surface Load, meaning the volume of slurry m3/h fed per m2 of clarifier surface. Typical surface loads are given below. |
Minning Projects | Conventional thickener
Continuous thickening to give the required solids concentration in the underflow depends on balancing the volumetric solids flow rate at a critical concentration with the diameter of the thickener. |
Minning Projects | Conventional clarifier/thickener Design
Bridge type
For smaller thickeners, up to 30 40 m diameter, the rakes and drive mechanism are supported on a bridge superstructure, which straddles the tank as shown.Centre pier type
For tanks over 30 40 m diameter a bridge structure will be impractical. The mechanism and r... |
Minning Projects | Inclined Plate Settler IPS
The inclined plate settler consists of two main components, the upper tank containing the lamella plates inclined at 55° and the lower conical or cylindrical sludge container.
The feed for the inclined plate settler enters through vertical chambers on either side of the lamella packs and pa... |
Minning Projects | Mechanical dewatering Introduction
Mechanical dewatering means mechanical removal of liquids from a slurry to obtain the solids in a suitable form and/or recovery of a valueable liquid for:
Further processing Transportation Agglomeration Disposal Recovery of valuable liquids |
Minning Projects | Gravimetric dewatering
When the particles in a slurry are too coarse for the capillary forces to trap the water, the use of gravity is enough to remove the water and give at least transportable solids.
|
Minning Projects | Al Jalamid Beneficiation Plant 12Mtpy
Dec 17, 2007
RIYADH, Saudi Arabia, 17 DEC 07: Ma'aden has today signed the final two major plant contracts for its mega phosphate project. The contracts are for the power & desalination plant as well as the beneficiation plant of what will be the worlds largest fully integrated... |
Minning Projects | Power & Desalination Plant
Site mobilisation for the power and desalination plant will commence in January 2008 with construction stating in May of that year. The plant is expected to be completed and fully operational by the middle of 2010.The power plant consists of 2 x 66% Siemens Condensing Steam Turbines & Generat... |
Minning Projects | Beneficiation Plant
Construction on the beneficiation plant at Al Jalamid will commence in April 2008, with completion expected by May 2010.
The beneficiation plant is required to remove calcium and magnesium carbonates from the phosphate deposit run-of-mine ore to produce 4.63 MTPY dry phosphate concentrate suitable f... |
Minning Projects | About Maaden
Ma'aden was established as a Saudi Arabian joint stock company in March 1997 to facilitate the development of Saudi Arabias non-petroleum mineral resources and to diversify the Kingdoms economy away from the petroleum and petrochemical sectors. Maaden is engaged in the development, advancement and impr... |
Minning Projects | Involved in Projects management in varying capacity, prepare close out reports for Al Jalamid
projects, involve in reviewing the design of the new assets water treatment plant, new 2 impact
crushers, rod mill and belt filter. Supervision of assets construction. Prepare scope of work for all modification to plant, prepa... |
Minning Projects |
Involved with PMC team in pre-commissioning and commissioning of the 3 GE/GTG and main
substation building, this included review method statements, the walk down, generate punch list, test
packages and witnessing the hydro tests
Involved in field checking equipment installations against P&ID, liasing with benefici... |
Minning Projects | XXX has assisted as a technical expert with Pre-commissioning and commissioning of the beneficiation plant including the following sub-systems: Primary crusher, secondary crusher, stacker and reclaimer, milling and desliming systems, reverse flotation,
wet concentrate storage, drying and tailings disposal.
Monitored... |
Minning Projects | Project located in the northern region of the Kingdom, The site is situated 23km from Al Jalamid village and 20km inside the desert. Al Jalamid village is located between Ar'ar and Turaif, about 100km from Ar'ar. Site
location is 31° 30' 51.7"N, 39° 57' 13.7"E (WGS84)
This Project is to economically mine the ... |
Minning Projects | The beneficiation plant will utilize the process developed by SAPC and refined by Litwin to produce 5.020 million tones per year (dry basis) of concentrated phosphate rock. The beneficiation process involves particle size reduction using crushers and rod mills followed by desliming, froth flotation to remove carbonates... |
Minning Projects | Trucks
Komatsu 830E, 930E and 630E
930E and 630E - used for removal of overburden
630E used to take ore to dump pad
Service intervals
250 Hr service Service Sheet
Change engine oil, radiator coolant samples
500 Hr
750 Hr
1000 Hr
1250 Hr
1500 Hr
1700 Hr
2000 Hr Major Maintenance
Major equipment in the trucks, ge... |
Minning Projects | Electrical Shovels (Liebherr 996 , Komatsu & Hitachi) |
Minning Projects | Wheel Loaders
To be used in the dump pads
Caterpillar 992 |
Minning Projects | Excavators
Used for construction of roads and pits |
Minning Projects | Water Carts
Used foe dust impressing |
Minning Projects | Pit dewatering pumps
To evacuate pits during rainy season, Aker Wirth Pumps |
Minning Projects | FIX PLANT
Bull Horn Crusher/ feeder and hopper arrangement
Ore is fed into a Hopper and then transported to the crusher with the help of conveyors
There is a different control room for the crusher
Major reliability issues with bull Horn Crushers is,
Cracks in the Horns
Bondi Product melt and become one product
Fee... |
Minning Projects | Mine Fixed are is two parts
Dry Area
In a mine where there is crushing
Wet Area
Grinding and rest |
Minning Projects | Gyratory Crusher -> 2 X Cone Crusher ( Serial and no stand by crusher) Banana Screen/ Vibratory Screen
During Grinding water is added to the system |
Minning Projects | Reliability Issues
Roller damage
Belt damage
Hopper liner worn and damage |
Minning Projects | RCA Analysis
Power Plant General 15 MW , Piston damage
/back pressure exhaust Cracker muffler
Power plan is totally unmanned and have 5 engines = 3 (Run) + 2 (Standby)
Engine is 4.2 MW
Type of oil 320 or 220 oil |
Minning Projects | SAG Mill Grate Ball/SAG Mill
Liner replacement in a Shutdown, every 8 12 months
Ball feed conveyor
Grate reliability Issue. The solution was
SWI Standard Work Instructions
Check Hardness ( Hardness test Brinell hardness test)
QA assurance from supplier
Relining machine Replace grates |
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