On August 23, the factory quotation of calcium carbide in Northwest China increased by 116.66 yuan / ton, or 2.19%, and 99.02% year-on-year compared with the quotation on August 20. The price of raw material blue carbon rose slightly, and the cost of calcium carbide supported well. The downstream PVC market has risen slightly recently, and the downstream customers' enthusiasm for calcium carbide procurement has increased. At the same time, a new round of power rationing in Inner Mongolia began, and the output of calcium carbide decreased. The shortage of supply is the main reason for the rise of calcium carbide price.