There is a range value for the discharge particle size of the limestone pulverizer. According to the specific process requirements, the fineness of the powder is different. We often choose the ultra-fine LUM Vertical Pulverizer to grind the limestone, and its discharge particle size is 400 - 650 mesh. The grinding of the limestone powder is commonly used in Portland cement, power plant or steel plant desulfurization.
As the main component of limestone, calcium carbonate can be used as building materials, mainly as decorative stone pillars or handicrafts, and also as an important raw material for industrial use. Vertical mills can process limestone, and can give full play to its advantages as much as possible after grinding, separation and other steps with other auxiliary equipment, so as to make it more widely used.
1. The particle size requirements of limestone used as Portland cement.
Generally, limestone can meet the use requirements of cement raw materials after being ground by crusher and pulverizer. According to the current market situation, cement peak shift production is to respond to environmental protection, but the overall demand is still relatively large.
2. Limestone desulfurization absorbent is mainly used in power plants.
The limestone in the absorption tower is mixed with water to form slurry, and then mixed with flue gas. The sulfur dioxide reacts with the calcium carbonate in the slurry under the action of air, and then is desulfurized into gypsum. This process is still relatively mature and widely used. The limestone desulfurization production line expands the use of limestone.
3. Particle size of light calcium carbonate products.
Limestone can be calcined and carbonized to produce light calcium carbonate products. Light calcium carbonate can be divided into five particle size grades according to the average particle size: Particle size 5μm or more, fine powder 1 ~ 5 μ m, Micro powder 0.11～1μm, Ultra fine powder 0.102 ~ 011 μ m, Ultrafine powder below 0.102μm. At present, the industrial production of nano light calcium is widely used in coastal areas. The light calcium carbonate with cubic and spherical crystal form is more suitable for the plastic industry.
4. The sand size of casting mold used for manufacturing machinery.
The particle size of cast sand produced by limestone is 28 ~ 75 mesh. This kind of molding sand has better performance than quartz sand, which is easy to drop sand and clean, improves the surface quality of castings, increases the surface finish of castings, and basically eliminates the harm of worker silicosis.
After summarizing the uses of limestone, we will find that after grinding it into lime powder, it can be roughly divided into lime powder used in industry and chemical industry according to its different uses. The fineness of limestone powder under these two categories is different. Generally speaking, the requirements for the particle size of limestone powder used in industry are not too high. At the same time, in order to improve production efficiency and output, we mostly choose vertical mills to complete the grinding.
