Slurry pumps are frequently used to transport fluids such as slime water, flowing water, coal slurry, heavy medium suspension, and other liquids. The functioning of the slurry pump, a crucial auxiliary device in the coal preparation plant process, directly impacts the smooth operation of the production system. In coal washer plants, horizontal single-stage centrifugal and vertical single-stage pumps are often used.
Slurry pumps typically transfer slurry particles, such as coal slurry and slurry, during the washing stage of coal and metal ore. The step of coal processing, known as coal preparation, is essential.
The coal is referred to as raw coal and is immediately mined from the mine. The mining process introduces numerous contaminants into the raw coal, changing its quality. Preparing coal involves removing contaminants from raw coal or separating high-quality coal from low-quality coal.
Application of Slurry pump in a Coal Plant
- Slurry pump: To separate the raw coal into different portions, the medium suspension in the bucket is pumped into the shallow trough heavy medium separator tank body in line with the stipulated density.
- Gravel pump: After magnetic separation, the concentrate (medium) from the diluted medium suspension in the unclean medium bucket is recovered and returned to the combined medium bucket.
- Vortex pump: The slime-thickening cyclone separates the slime water in the slime bucket.
- Horizontal pump: The mixed medium bucket from the groundwater pump.
- Water pump: The thickener’s clear water is pumped to the water washing system, sprayed to clean the medium and screen and make up water for the system.
- Underflow pump: Concentrate in a pool of water with a high concentration of coal slurry pumped to the bucket’s water cleaning system. To separate coal slurry and water, use a vertical slurry pump to transfer high-concentration coal slurry water into the filter press.
- Filtrate pump: The filter press’s cleaned filtrate is transferred from the filtrate bucket to the concentration tank using the filtrate pump.
A typical medium-sized coal preparation facility will be furnished with dozens or even hundreds of slurry pump to provide a complete coal-washing process.
How to Choose the Slurry Pump in a Coal Preparation Plant?
Most slurry water or coal slurry with magnetic powder is used in the pump conveyor used in coal washeries. Therefore, when choosing a slurry pump for a coal preparation facility, keep the following in mind:
- Qualities that resist wear and tear and are dependable.
- The water leakage issue is unfounded; the shaft seal is trusted.
- The chamber filter press has requirements for the slurry pump. When the chamber filter press starts to work, it must have a low pump lift and large total flow; in the middle and late stages of the work, it must have a high pump lift and small full flow, i.e., the steeper the curve between total flow and pump head, the higher the total flow requirement.
The life cycle cost, is the energy cost of operating the pump. And the cost of repair and replacement parts should all be considered when buying a coal ash slurry pump rather than just the purchase price and initial efficiency.
In terms of performance, wear resistance, power, and maintainability, the giant pump should be chosen when choosing a slurry pump. Essential things to think about are:
- What is the required head and flow?
- What is the pumped medium?
- How to install it?
- Is the maintenance convenient and the operation stable?
Why You Should Choose the Right Pump for Coal Slurry: Thing to Remember
Pumps are required in the industrial and mining sectors to move extremely corrosive, highly viscous, and highly abrasive media. As a result, specialized pumps specifically designed for each application are needed.
The Challenge
When coal is extracted from the ground, up to 50% of the material is waste—dirt, stones, and other impurities that must be taken out of the coal before it can be processed and burned. Coal is washed, crushed, and sized in a coal preparation facility. Whose throughput can reach an average of 4000 short of that. A coal preparation facility may flood, become hazardous to operate or be forced to shut down if processes and wastewater streams are not correctly handled.
Pumps must be used to handle collected water in several places at a facility, including holding ponds fueled by runoff from raw and clean coal stockpiles, basement cleanup and conveyor belt head sumps, and truck-washdown sumps. The water that needs to be pumped is typically a murky, abrasive slurry that contains dirt, briquettes, coal fines, and even nuts and bolts from broken machinery.
The solid concentration of the coal slurry used in this application is less than 0.5mm. The slurry is extraordinarily abrasive and resembles a thick paste. A pump that could satisfy the demands of the product and the location was necessary for a coal mine in Queensland. The pumps in use poorly performed the handling of coal slurry up until that point.
The Solution
Coal slurries need plumps of the highest caliber and performance because of their unique chemical and physical characteristics. Kingdapump was consulted, and we offered a pump. This pump was able to handle the slurry and increased the efficiency of the mine. The business provides a complete selection of pumps for numerous unique industrial applications.
Acknowledges that each sector and application has specific pumping needs. They provide highly customized pumping solutions for each unique application, going against the “one size fits all” philosophy.
Slurry Pump Maintenance in Coal Preparation Plant
The slurry pump is only often used in the production process of the coal preparation plant for the transportation of liquid waste such as slime, circulating water, coal slurry, and heavy medium suspension. It also directly affects the process indicators when used as a grading (concentrating) cyclone (Water) sorting cyclone and filter feed pump. As a result, washing (choosing) coal plant slurry pump maintenance and maintenance work is significant, having a direct.
In most cases, the slurry pump machine has been adjusted in the factory before the coal preparation plant’s purchase of a slurry pump within six months, negating the need for demolition. Instead, all that is required before using a slurry pump is to check to see if the rotation is flexible, check for rust, perform any necessary oiling work, and add filler as needed.
The following are additional slurry pump use and maintenance precautions:
- Keep the set dry, clean, oil-free, and with a little leak.
- Daily checks to see if the slurry pump is operating normally. Leaks, vibrations, etc., revealed a problem that had to be fixed quickly.
- Verify that the slurry level inside the pump is suitable. The correct oil level should be less than 2mm and close to the oil bit line.
- Operating the slurry in the tank where it is evacuated is strictly prohibited since doing so causes the slurry pump to vibrate, which shortens its lifespan.
- Each slurry pump is labeled with the largest solid particle size that is permitted to pass. The pump is strictly forbidden from entering into metal objects and beyond the pump to allow the passage of sizeable solid particle pieces; the slurry pump is strictly prohibited from entering into rubber, cotton, plastic, and the like; this prevents damage to the slurry pump’s overcurrent part and contains the impeller and runner from being blocked, which prevents the pump from functioning correctly.
- To frequently check for shaft seal water leaks, adjust the filler gland bolts as needed, and replace the filler as soon as necessary.
- To maintain it within the predetermined range, the clearance between the impeller and the pump’s front guard must be adjusted from time to time. Make that the slurry pump is run at its highest efficiency. The adjustment process must follow the force requirements in the operating instructions Law and stages.
- Always check the temperature of the slurry pump bearings; the maximum temperature is typically less than 75°C.
- According to the period mentioned in the slurry pump’s operation instructions, thoroughly replenish the lubricating oil slurry pump regularly. Periodically check, fix, or promptly replace the damaged parts. The slurry pump is functioning correctly.
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Summary
Power stations must take great care while treating coal ash slurries. They require specialist pumping equipment made to tackle this demanding job because they are challenging to transfer using standard pumps. With its revolutionary pump design that uses eddy currents, the Kingdapump Pump provides a particular answer to this issue.
In pond pumping applications, Kingdapump pumps offer excellent performance over an extended time to reduce the total cost of ownership. These powerful pumps have been added to fly ash dredges as dredge pumps that can remove ash from lined ponds securely without damaging the liner or causing leaks. The risk of leaking from lined ash ponds can be reduced, and expensive maintenance shutdowns can be avoided with suitable slurry pumps.
