Coal dust is a combustible material, particle characteristics of coal dust is composed of size does not pass, irregular shape of the particle powder, general coal dust particle diameter range of 0-1000um, mostly 20-50um particles. The role of coal dust is very big, in cast iron with wet sand with coal dust, can prevent the casting surface sticky sand defects, improve the surface finish of the casting, and can reduce the sand entrapment defects, improve the collapsing function of the sand, for the wet ductile iron parts, but also effectively prevent the generation of subcutaneous air holes, can be used in the round swirl burner, the air does not need to be preheated.

Characteristics of coal powder

1, fineness value: the size of the fineness value of the coal powder, only explains the size of the coal powder in the size of the particles in and less than the x value of the number of particles, but does not know the composition of the coal powder particles, i.e., do not know the size of the uniformity of how.

2, uniformity: the degree of uniformity of coal powder is generally between 0.8-1.3, the larger the value indicates that the uniformity of the coal powder is better, for example, medium-speed coal mill than the steel ball cylinder mill grinding coal powder uniformity is better, that is, its value is larger.

3, moisture: in the foundry industry in the proportion of water brought into the coal powder is far less than the water added when mixing sand, so the general control is not too strict, should be controlled at 6% or less, the enterprise in the selection of coal powder, should not take the moisture index as a measure of the quality of good or bad quality of the coal powder index.

Coal powder processing

The use of coal dust is processed by the dryer, it can be directly used as fuel, so that the coal dust can be used twice. Firstly, the mined coal will be crushed by primary and secondary crushing, then diameter grinding process, and finally dried by the dryer can be used. The finished coal powder material produced by our equipment, particle size and particle size uniformity, general coal powder particles diameter range of 0-1000um, most of the 20-50um particles, while the equipment has a high yield, energy consumption is small, is an important equipment for processing coal powder.

Investment prospect

China is rich in coal resources, except Shanghai other provinces and regions are distributed, but the distribution is extremely uneven. In the north of China's Daxing'anling-Taihangshan, Helan Mountains, the region between the geographical scope of coal resources greater than 100 billion tonnes or more, including Inner Mongolia, Shanxi, Shaanxi, Ningxia, Gansu, Henan, 6 provinces and regions, all or most, is China's centralised distribution of coal resources in the region, the amount of resources accounted for about 50% of the country's coal resources, accounting for the north of China's coal resources accounted for more than 55% of the amount of coal resources. In southern China, coal resources are mainly concentrated in Guizhou, Yunnan and Sichuan provinces, with the total coal resources of these three provinces amounting to 352.574 billion tonnes, accounting for 91.47% of the coal resources in southern China; and the proved and reserved resources also account for more than 90% of the proved and reserved resources in southern China. Coal is the basic energy source in China, accounting for about 70% of primary energy.

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