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Air swept coal mill

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Air swept coal mill

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Characteristics of Air Sweep Coal Mill：

　　1The grinding body is short and thick, and the aspect ratio is generally less2;

　　2The diameter of the hollow shaft is large, the ventilation area of the partition plate between the drying bin and the grinding bin is large, and there is no discharge grate plate at the grinding tail, so the ventilation resistance is small;

　　3The utilization amount of hot exhaust gas can reach2.6- 3.9kg /kgMaterial, can be dried moisture content is less8%If another hot stove is set up to supply high-temperature hot air, it can be dried to contain moisture.12%The raw materials can be dried if a pre-crushing dryer is set up.15%of moisture. The working principle of the air-swept coal mill is to lift the material powder by air and separate it with a coarse powder separator, so the cycle load and powder selection efficiency are low, affecting the grinding efficiency. At the same time, when grinding materials with large moisture content, the wind speed in the mill is large, which increases the chance that the steel ball can not mill the materials, and also affects the grinding efficiency. Therefore, this mill system has a lower theoretical power output per unit than the lifting cycle mill system, and the energy consumption is also about high.10%-12%. When this mill system is used to dry and grind materials with large water content, a pre-drying pipeline can also be added outside the mill. The materials first enter the pre-drying pipeline for preliminary drying, and then enter the mill for drying and grinding. At the same time, to control the feed particle size is not greater 15mm In order to facilitate the selection and improve the efficiency of drying and grinding.

Technical parameters:

Product Name	Specifications	Design ability (t/h)	Main technical performance
steel ball coal mill	φ1.7 ×2.5m	3-5	Feeding particle size ≤25mm, Infeed moisture <12%, discharge moisture <1.5, Temperature of feed gas ≤350 ℃ Mill gas temperature 60-80 ℃, Highest ≤120 ℃Cylinder speed 24.5e/min
air swept coal mill	φ2.2 ×4.4m	8-9	Feeding particle size ≤25mm, fineness 88 μm, Sieve residue <10%, grinding gas temperature <300 ℃, Mill gas temperature <60-80 ℃, The moisture in the grinding is less than 8%, and the moisture in the grinding gas is less than 1.5, Barrel speed 22.4r/min Ball volume 20t
air swept coal mill	φ2.4 ×4.75m	14	Feeding particle size ≤25mm, fineness 88 μm, Sieve residue <10%, grinding gas temperature <300 ℃, Mill gas temperature <60-80 ℃, grinding moisture <8%, The moisture content of the grinding gas is less than 1.5, and the rotation speed of the cylinder is 20.4r/min.
air swept coal mill	φ2.4 ×8m	12-13	Feeding particle size ≤20mm, fineness 88 μm, Sieve residue <10%, grinding gas temperature <300 ℃, Mill gas temperature <60-80 ℃, The moisture in the grinding is less than 8%, and the moisture in the grinding gas is less than 1.5, Barrel speed 21.4r/min Ball volume 30t
air swept coal mill	φ 2.6 × 5.25 2.25m	9-10	Feeding particle size ≤25mm, Raw coal moisture ≤ 10% grinding fineness 88um, Sieve residue of hole sieve 1-3%
air swept coal mill	φ 2.8 × 53m (Tianjin Hospital)	16-17	Medium grindability, raw coal moisture 10%, Fineness 80μm, sieve residue: 10-12
air swept coal mill	φ3 ×9m	18-22	Feeding particle size ≤25mmMoisture of raw coal into the mill ≤ 10%, Fineness 88 μm, pore sieve residue less than 10-12%, Barrel speed 18.3 r/min Ball volume 43t Medium hardness
air swept coal mill	φ3.2 ×9m	18-22	Feeding particle size ≤25mmMoisture of raw coal into the mill ≤ 10%, Fineness 88 μm, pore sieve residue less than 10-12%, Barrel speed 18.25 r/min Ball volume 53t Medium hardness
air swept coal mill	φ3.4 ×9m	30	Feeding particle size ≤20mmMoisture of raw coal into the mill ≤ 10%, The fineness is 88 μm, and the sieve residue is less than 6-8%, Barrel speed 17.61 r/min ball volume 58t medium hardness
air swept coal mill	φ3.6 ×9m	30-32	Feeding particle size ≤20mmMoisture of raw coal into the mill ≤ 12%, The fineness is 88 μm, and the sieve residue is less than 6-8%, Barrel speed 17.61r/min Ball volume 60t Medium hardness
air swept coal mill	φ3.8 ×9.5m	36-40	Feeding particle size ≤20mmMoisture of raw coal into the mill ≤ 10%, Fineness 88 μm, pore sieve residue less than 3-5%, Barrel speed 16.7 r/min Ball volume 88t Medium hardness
roller disc coal mill	φ1600mm,	33.5	Air volume10.7Kg/S, working diameter of grinding disc1600mm, Diameter of grinding roller1240mm, grinding roller width380mm, Disc speed 28.7r/min, sealing air volume0.7Kg/S
roller disc coal mill	φ1700mm	39	Air volume12.46Kg/S, working diameter of grinding disc1700mm, Diameter of grinding roller1320mm, grinding roller width410mm, Disc speed 27.8r/min, sealing air volume0.75Kg/S
roller disc coal mill	φ1800mm	45	Air volume14.38Kg/S, working diameter of grinding disc1800mm, Diameter of grinding roller1400mm, grinding roller width430mm, Disc speed 27r/min, sealing air volume0.8Kg/S
roller disc coal mill	φ1900mm	52.6	Air volume16.75Kg/S, working diameter of grinding disc1900mm, Diameter of grinding roller1480mm, grinding roller width450mm, Disc speed 26.4r/min, sealing air volume0.85Kg/S
roller disc coal mill	φ2000mm	58.5	Air volume18.55Kg/S, working diameter of grinding disc2000mm, Diameter of grinding roller1560mm, grinding roller width480mm, Disc speed 25.6r/min, sealing air volume1.42Kg/S
roller disc coal mill	φ2120mm	67.7	Air volume21.65Kg/S, working diameter of grinding disc2120mm, Diameter of grinding roller1650mm, grinding roller width510mm, Disc speed 24.8r/min, sealing air volume0.95Kg/S
roller disc coal mill	φ2250mm	78.7	Air volume24.74Kg/S, working diameter of grinding disc2250mm, Diameter of grinding roller1750mm, grinding roller width540mm, Disc speed 24.8r/min, sealing air volume1Kg/S

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