Coal with a force of the wind, from the kiln coal burner sprayed into the kiln, so the primary air transportation for coal from the role, but also the supply of coal volatile oxygen required for combustion. Primary air volume ratio of the total volume of air not too much, because the amount of wind will cause a corresponding increase in the proportion of secondary air ratio is lowered (total air volume unchanged), the reduction of secondary air will affect the clinker cooler, and take away the clinker increased heat loss, while the primary air temperature lower than the temperature of the secondary air (to make coal will not explode, the primary air temperature is not higher than 120 ° C), so that the combustion temperature should be lowered. Usually a total amount of air of about 25% of the air, in order to ensure a sufficient amount of secondary air, primary air only 15% of the amount of air. It was also suggested in the production can be considered volatile coal the amount of air needed for combustion air is regarded as an amount, i.e., a percentage of the amount of air can be controlled in approximately equal to the percentage of volatile matter of coal, which can be used as a rough estimate number. After a set amount of wind, coal injection nozzle diameter will determine a wind speed, so it is necessary according to the primary air volume and speed to determine the nozzle diameter. The above article by Henan YuFeng Heavy Machinery (http://www.yufchina.com) finishing release, reproduced, please indicate the source!