Liming Heavy Industry create a model for clean coal powder preparation in magnesium smelting industry
As an important light metal material, magnesium and magnesium alloys have the advantages of light weight, high strength, good thermal conductivity and corrosion resistance. Therefore, they are widely used in industry, military, aerospace, medical and other fields, and are known as "the green engineering materials with the most development and application potential in the 21st century".
When using dolomite as raw material to smelt magnesium metal, dolomite must first be sent to the rotary kiln for calcination to obtain calcined white. In this process, the rotary kiln fuel mostly uses coal powder with high burnout rate, clean and environmental protection, and good stability as fuel, which fully meets the production needs of continuous operation of the rotary kiln and is widely used in solid fuel for rotary kilns.
As the main equipment of the coal powder preparation production line,LM vertical coal mill provides sufficient and high-quality coal powder fuel for the company's dolomite calcination link, and has won the satisfaction and praise of customers for its energy-saving, environmental protection and safety characteristics.
Project Overview
The user is a large-scale magnesium smelting enterprise focusing on dolomite mining and processing. In the rotary kiln calcination process, its fuel supply system chooses to use LM vertical coal mill complete set of equipment. The entire coal powder preparation production line is designed by Liming Heavy Industry, which fully combines the user's on-site conditions, has a reasonable and compact layout, small footprint, and low investment cost.
As the main equipment of the coal powder preparation production line,LM vertical coal mill provides sufficient and high-quality coal powder fuel for the company's dolomite calcination link, and has won the satisfaction and praise of customers for its energy-saving, environmental protection and safety characteristics.
Processing material: coal
Finished product fineness: 200 mesh
Finished product use: rotary kiln fuel
Equipment used: LM vertical coal mill
Clean coal powder preparation production process
The raw coal is sieved from the raw coal yard through the grid screen and falls onto the high-angle belt conveyor or elevator. After the electromagnetic iron remover removes iron, the belt conveyor or elevator 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 LM vertical coal mill for drying and grinding. The hot air or exhaust gas from the hot blast furnace enters the vertical coal mill under the extraction of the system fan. After sufficient heat exchange with the raw coal being ground in the mill, the coal powder is brought up for sorting at the separator. The coarse coal powder with unqualified fineness falls back on the grinding disc for grinding. The qualified coal powder enters the explosion-proof air box pulse dust collector with the air flow and is collected and unloaded into the coal powder bin through the grid wheel. The debris in the raw coal, such as some coal gangue, metal blocks, etc., are discharged from the mill through the wind ring and slag outlet. In the whole process, a CO-O2 online analysis system is set up. When processing coal with high volatile content, safety measures such as nitrogen protection and CO2 automatic fire extinguishing system can be set up.
Product advantages
1. Leading technology, low investment cost
It integrates crushing, grinding, drying, powder selection and transportation, with a compact layout and can be arranged in the open air, with low investment cost.
2. Low operating cost
The equipment is easy to operate, adopts a thin oil automatic forced lubrication system, and is equipped with a hydraulic roller turning device. During maintenance, the grinding roller can be turned out of the machine by the hydraulic device. The maintenance space is large, maintenance is convenient, and the operating cost is low.
3. Safe and reliable operating system
Adopting five-level safety and explosion-proof measures, the design is safe and reliable, and meets national and industry parameter specifications.
4. Large drying capacity
Hot air can be used to convey materials, and the inlet air temperature can be controlled according to the moisture content of the materials. The materials with up to 15% moisture entering the mill can be dried, and the moisture out of the mill is <1%.
5. High grinding efficiency and good product quality
Special grinding roller and grinding disc structure design, and the grinding roller adopts a hydraulic automatic pressurization device, with a large grinding area, high grinding efficiency and large output.
6. Integrated comprehensive solution
Professional technical service team provides users with design, supply, installation general package services, integrated comprehensive solutions.
Request a quotation
