Kefid after years of hard exploration,combined with the previous experience in manufacturing,to design a new pulverized coal preparation process:raw coal from the raw coal yard through the grid sieve after sieving into the large angle belt conveyor or hoist,iron after the iron,the belt conveyor or hoist to the original coal into the original coal warehouse for storage.After the system has been started to start the system,open the bottom of the coal bunker bar valve ,start sealing measuring tape to the coal machine,raw coal into the vertical coal mill for drying,grinding.
Hot air or exhaust gas from the hot air stove,in the system under the pumping of the fan,into the vertical coal mill,and the mill was grinding the coal for the full heat exchange,with the coal from the separator at the separation,fine unqualified coarse coal power to fall on the grinding wheel for grinding,qualified coal with the air into the explosion-proof gas box pulse collector was collected down,through the sub-grid unloaded into the coal warehouse.Raw coal in the debris,such as part of the coal gangue,metal blocks,etc.,through the wind ring,spit mouth discharge out of the mill.
Coal gangue is the solid waste which discharged from coal mining and washing process.It is a dark gray rock which is harder than coal with low carbon content in coal-forming process associated with coal seams.
After crushing, milling process, coal gangue can be used to produce cement, fired brick, lightweight aggregate and other fields. In different fields,the application of coal gangue required different granularity. Therefore, we should choose different equipments.
To process coal gangue, we normally use jaw crusher, impact crusher, raymond mill, European type grinding mill, vertical mill, European hammer mill. European hammer mill is mainly used for fine crushing and coarse grinding operations and can be used in gangue processing. The discharging size is between 0-3mm.
If you want to process gangue into 150 mesh, 200 mesh, you need to use European type grinding mill, raymond mill, vertical mill. Because of its high fineness, the capacity will be lower than European hammer mill.
If you do not want fine process, you only need to use jaw crusher and impact crusher to produce aggregate of 0.5,1-2,1-3,3-8cm for paving, building and other fields.
Many crushing equipments can be used to process coal gangue, we need to choose suitable equipment according to their own needs.
The best solution for coal powdering and processing in colombia
Our Raymond mill is very suitable grinding equipment for coal grinding. We have one new type that named European grinding mill, because it is adopted European advanced technology. It can totally meet your requirement of 200 mesh with 85% PT. The largest production is around 40 tph.
Coal mill is what we usually call raymond mill, it is a very commonly used mill. It can be used to process various non-flammable and explosive ores with Mohs hardness below 7 and humidity below 6%, such as coal, gypsum, talc, calcite, limestone, marble, barite, dolomite, granite, kaolin, bauxite, red iron oxide, iron ore, etc.
In order to meet the different production needs of users, manufacturers will produce many types of coal mills. Take the coal mills produced by Kefid as an example, the 4R3216 models that can meet the output of about 3 tons per hour. The number of mill rollers is 4pcs, the feed size is 20-25mm and the power is 37Kw.
Kefid can also tailor-made equipment to meet your needs. Different types of mills have different configurations, even if the output is the same, the performance and life of the equipment are also different. Therefore, there is no fixed value for the price of a coal mill with an output of 2-3 tons per hour. This requires different configurations based on the user's production situation. The user can communicate with the manufacturer when purchasing.
The raw coal is sieved from the raw coal storage yard through a grid screen and then falls onto a large inclination belt conveyor or hoist. After iron is removed by an electromagnetic separator, the belt conveyor or hoist sends the raw coal to the raw coal bunker for storage.
After the pulverizing system has been started, open the rod valve at the bottom of the raw coal bunker, start the sealed metering belt coal feeder, and the raw coal enters the vertical coal mill for drying and grinding.
The hot air or waste gas from the hot blast stove is drawn by the fan of the system and enters the vertical coal mill. After sufficient heat exchange with the ground coal in the mill, the pulverized coal is taken up and separated at the separator. The unqualified coarse pulverized coal falls on the grinding disc for grinding again, and the qualified pulverized coal enters the explosion-proof gas box pulse dust collector with the air flow to be collected, and is discharged into the pulverized coal bin through the dividing wheel. The sundries in the raw coal, such as some coal gangue, metal blocks, etc., are removed from the mill through the air ring and the slag outlet.
In the entire process, a CO-O2 online analysis system is installed. When processing coal with high volatile content, safety measures such as nitrogen protection and CO2 automatic fire extinguishing system can be installed.
For the production line with an annual output of 200,000 tons, Kefid has many similar customer production cases at home and abroad. Take a pulverized coal preparation system of a steel plant as an example, the processing material is bituminous coal, with a particle size of 200 meshes, and a single machine produces 18-22 tons/hour. The equipment host configures two LM1500 vertical mill and jaw crusher.
This project is a pulverized coal preparation project of a steel mill. The main machine is equipped with LM1500 vertical mill with a power of 600 KW. The desulfurization, denitrification and dust removal devices are installed integrally, making the combustion efficiency of the pulverized coal boiler higher, the output higher and pollutant discharge reducted.
It is a very good equipment for pulverized powder in coal preparation, power plant desulphurization, cement and slag. According to customer evaluations, Kefid's vertical mill has been operating stably. It has been used for more than 6 years. It has high output, low consumption of wearing parts.
If you are interested in vertical mill price, please contact our 24hour online customer service.
For more details, you can contact us online or send email to sales@kefidinc.com now.
