Ball mill dust collector is based on theprinciple of fiber fabric filter to complete the smoke and dust removalprocess. With the advent of needle-felt filter media and filter media, the dustremoval efficiency of the bag filter can reach over 99.99%, the emissionconcentration is lower than 50mg / m3 and even lower than 10mg / m3, achievingsmokeless emission near zero pollution. Many of the cement plant's mainworkshop clean production, are from the grinding plant installation bag dustcollector began.
Ball mill dust collector adapt tolarge-scale equipment and high concentration of fine powder collection.Large-scale ball mill dust remover is a significant symbol of the technologicalprogress of the modern cement industry. Not only the high production capacityof a single machine, good scale and efficiency, but also the uniform material,product quality and stability. In the new dry-process production, large-scalevertical mill is selected. In the production of modern vertical kiln, the usageof large mill group kiln technology has become the representative of China'sadvanced productivity of cement enterprises. Large-scale grinding process, isinseparable from the large-scale high-concentration bag ball mill dust collector,it is not only dust control of environmental protection equipment, but also tocomplete the production of fine powder collection equipment.
Improve the surface area and avoid overgrinding phenomenon
In the cement production process, rawmaterials into the raw material mill or cement mill are compound materials withdifferent components, such as limestone material, siliceous material, claymaterial and ferrous raw material of the raw material system and the like;Cement mill clinker, gypsum, mixed materials (such as fly ash, slag, etc.). Theease with which the ingredients are pulverized (that is, the ease of grinding)varies so that the degree of pulverization (pulverization speed) increases withtime. In the effective internal residence time in the mill, some components ofthe material quickly reached the fineness of the grinding requirements, but hadto accompany other hard-to-wear components of the material in the mill to stay,the more grinding, the more thin, more than the fineness of the millrequirements. As the temperature of the mill increases, the electrostaticeffect generated by these fine powders becomes stronger and stronger, which notonly alleviates the impact of the abrasive body, but also will paste the balland paste the lining to reduce the grinding efficiency, which is the phenomenonof "over grinding ", should try to avoid.
After the implementation of the newnational cement standards, require the fineness of cement, the specific surfacearea increased, and various enterprises to varying degrees to adjust thegrinding grading and other process parameters, the appropriate extension of thematerial in the mill residence time in order to find more abrasive materialsFine, more powder content, at the same time more prone to over grindingphenomenon. In order to avoid over grinding phenomenon, it is necessary toincrease the speed of wind in the mill, increase the amount of ventilation,advance the easily ground material out of the barrel in time and rapidly, andthe work can be done by the ventilation dust removal system. The practice oflong-term operation proves that the ventilation and dust removal systemcomposed of the bag dust collector and the fan not only helps the ball mill toincrease the specific surface area of the mill material and meets therequirements of the new standard, but also can avoid the over-grindingphenomenon and significantly improve the powder Grinding efficiency. It can besaid bag filter in improving the specific surface area, to avoid over-grindinghas an irreplaceable role.
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