Causes and solutions of zinc oxide rotary kiln knot

Zinc oxide rotary kiln is a professional design rotary kiln for the zinc oxide, because zinc oxide for the fine powder, so we specifically developed a specific zinc oxide rotary kiln based on zinc oxide characteristics.
Zinc oxide rotary kiln is mainly composed of gas heater, gas-solid mixer, kiln body of rotary kiln, gas-solid separation of the collector. Zinc oxide rotary kiln working principle is: zinc furnace charge and coking coal grinding become less than 40 mesh particles, the zinc furnace charge and coking coal in accordance with the proportion of 1:0.30 ~ 0.35 mix until mixture, and then the mixture is made effective 8-15 mm diameter particle mixture, finally the particle mixture into the rotary kiln for smelting, the zinc content is 15% ~ 25% of zinc oxide ore or industrial slag during smelting production of zinc oxide, zinc can greatly save coke or coal, through smelting zinc oxide obtained high productivity, good quality, small amount of nodules.

The zinc oxide rotary kiln must prevent the production of kiln knot in the process of the reduction and recovery of the latent metal, so as to improve the capacity and finished product quality of the rotary kiln. In the production process, the reduction of lead, zinc and cadmium metal, the evaporation rate increases with the temperature of the reaction zone, but the high temperature makes the kiln life shorten, and the charge is melted to form the rotary kiln knot. What are the causes of rotary kiln knot?

1. Coking too high.
2. Coke powder particle size is bigger, more than 20mm accounted for more than 20%, rotary kiln tail temperature rise, the furnace melting, slag containing zinc is higher.
3. Coking low, slow speed, charge melting.
4. Charge containing high lead, resulting in melting, serious agglomeration.
5. Charged lead containing high, resulting in melting, serious agglomeration.

Find the causes, the problem is the key to solve. The following is some kiln knot treatment recommendations.
1. Timely destruction of zinc oxide rotary kiln ring.
2. Timely adjustment of coking ratio, even under the material.
3. Down the air duct, blowing material surface, and in the melting slag shovel a small amount of stones, to prevent melt warm water explosion.
4. Appropriate to improve the negative pressure, and the rotary kiln speed to let the slag release, as soon as possible to resume normal operation.