1 The impact of raw materials on product quality.
The raw material coal of flue gas desulfurization and denitrification equipment is different, and the indexes of activated carbon products produced are also different. In actual production, it is necessary to adjust the varieties and ratios of raw coal according to the needs of customers. Single coal is often difficult to meet production needs, so in actual production, it is often necessary to achieve the required strength and iodine value of the product through coal blending.
2 The effect of the coking index of coking coal on the ratio of raw materials.
When the coking coal with higher bonding index is used as the raw material, the colloid formed by the coking coal in the carbonization process has a certain bonding effect on the material, so the amount of tar blended can be greatly reduced, and the production cost is saved.
3 The effect of water addition on the bead.
After adding water, the water content of pulverized coal is preferably 35% to 40%, and it can be formed into a sheet shape by pressing with a finger. In this case, the amount of tar required is reduced and the cost is saved. Therefore, it is necessary to detect the pulverized coal water content after grinding to estimate the quality of hot water to be added during the kneading process.
4 The effect of kneading temperature on product quality.
In the kneading process, the mixed pulverized coal powder is first heated, and when the pulverized coal temperature reaches 60 ° C, the tar is added and the stirring is continued until the material is uniformly spheroidal particles having a size of 1 to 2 mm when the kneading is discharged, and the granules are smashed into pieces by hand. When the shape is discharged. At this point, the bead effect is good. The kneading process requires that the pulverized coal and the tar are fully fused and uniformly adhered to make the kneaded material particles uniform, and the extruded carbon strips have a uniform quality. Therefore, it is necessary to maintain a temperature of 60 to 80 ° C during the kneading process.
5 The effect of the temperature of the plodder.
After the kneading, the material enters the cylinder of the four-column hydraulic machine and is cooled. After the beading process, the pressure will be insufficient and the molding cannot be formed. Therefore, the cylinder of the four-column hydraulic machine and the mold need to be preheated in advance. In the production, the mixing granulation unit production equipment of this section is all steam insulated, which is beneficial to the coal tar, water and coal powder to fully infiltrate, penetrate and evenly disperse, and then prepare high-quality charcoal strip with high strength, smooth surface and difficult to be pulverized.
Coking coal, coke powder and tar can produce qualified or even high-quality desulfurization and denitration activated carbon through the ratio. The specific ratio should be determined according to the index of coking coal and coke powder and the order demand. In the production process, the entire molding process should be carried out at a temperature of 60 to 80 ° C to increase the molding rate.
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