Release time：2024-02-15 17:57:01
The briquetting machine can be used to press various powders such as coal powder, iron powder, coking coal, aluminum powder, iron filings, iron oxide scale, carbon powder, carbon powder, slag, gypsum, tailings, sludge, kaolin, activated carbon, coke powder, etc. Powder, waste, and waste residue are widely used in refractory, power plants, metallurgy, chemical, energy, transportation, heating and other industries. The materials formed by the briquetting machine are energy-saving, easy to transport, and improve the quality of the materials. The utilization rate of waste materials has good economic and social benefits.
According to analysis, general briquetting machines cannot completely compress coal particles. In addition to the difficulty in controlling the particle size of the raw pulverized coal and the moisture content of the binder, there are also the following two reasons:
1. When pulverized coal is under pressure, it is resisted by the friction within the coal particles, which hinders the movement and approach of the coal particles. That is, under the action of external force of pulverized coal, due to the irregular shape and uneven particle size of coal particles, friction exists on the particle contact surfaces and points, which will occur between large particles and affect the sliding of particles, so that the remaining gaps between particles cannot post-fill;
2. It is the elastic barrier of coal particles mentioned many times before. Based on this analysis, a new concept was developed, that is, when pulverized coal is subjected to higher pressure, the coal particles are in close contact with each other, and then the coal particles are twisted. Since the coal particles are in close contact and then twisted, appropriate shear deformation will occur on the surface of the coal particles. This shear deformation is called shear deformation. In this way, the coal particles can be twisted to produce shear deformation after being compressed.
It should be noted that it is not very difficult to form binder-free pulverized coal such as soft bituminous coal and anthracite, and no special molding method is needed to form it directly. For example, the clean water wet coal rods used in some small-scale synthetic ammonia and phosphate fertilizer production in my country are one example.
