本发明公开了一种炼焦煤干燥过程中煤质稳定性的控制方法,属于煤料干燥技术领域.具体为取待干燥的湿炼焦煤,缩分成若干份样品,取其中一份在空气中干燥,余下的置于预先设定温度为100～300℃的烘箱内进行干燥;每隔相同的时间,取出一份样品测定其煤料质量,煤料水分,煤料温度和黏结指数,待相邻两份样品之间的煤料质量保持不变,干燥已完全,停止试验;比较在空气中干燥样品与烘箱内干燥样品之间的黏结指数,得出煤质稳定性可控的煤料水分M和煤料温度T,满足如下数学关系式:若100℃≤干燥温度≤120℃,则煤料水分M>0,煤料温度T≤105℃;若120℃<干燥温度≤300℃,则煤料水分M≥0.20%,煤料温度T≤130℃.该方法测定的结果可靠性强,对于大规模炼焦过程中的煤料水分控制具备指导意义。

The invention discloses a method for controlling coal quality stability during coking coal drying, belonging to the technical field of coal material drying. Specifically, the wet coking coal to be dried is reduced into several samples, one of which is dried in air, and the rest is dried in an oven with a preset temperature of 100 ~ 300 ℃; Take out a sample at the same time to measure the coal quality, coal moisture, coal temperature and adhesion index. Stop the test when the coal quality between two adjacent samples remains unchanged and the drying is complete; Comparing the adhesion index between the samples dried in the air and the samples dried in the oven, the coal moisture MT and coal temperature TT with controllable coal quality stability are obtained, which meet the following mathematical relationship: if 100 ℃ ≤ drying temperature ≤ 120 ℃, the coal moisture MT > 0 and the coal temperature TT ≤ 105 ℃; If 120 ℃ < drying temperature ≤ 300 ℃, coal moisture m ≥ 0.20% and coal temperature TT ≤ 130 ℃. The results of this method are reliable and have guiding significance for coal moisture control in large-scale coking process.