论文部分内容阅读
我国天然石膏储量十分丰富,但是由于分布不合理,华东、华北等地区严重缺石膏,每年要从山西、甘肃、青海等地运来100多万吨,常常发生因运输问题影响生产的情况。为了解决石膏长途调运的问题,各地积极寻找石膏的代用品。近年来,沿海各省利用盐石膏代替天然石膏,取得了一定成果。盐石膏是海边晒盐的沉积物,是生产食盐的副产品。CaSO_4~·2H_2O的含量一般在85%以上,相当于(Jc16—82)的国家二级标准。用盐石膏代替天然石膏作生产水泥的缓凝剂,技术上是可行的。每生产100克盐,可收集盐
China’s natural gypsum reserves are very abundant. However, due to unreasonable distribution, gypsum is severely deficient in East China and North China. It transports more than 1 million tons each year from Shanxi, Gansu, and Qinghai, and production conditions are often affected by transportation problems. In order to solve the problem of long-distance transport of plaster, all parts of the country are actively looking for substitutes for gypsum. In recent years, coastal provinces have used salt gypsum instead of natural gypsum and have achieved some results. Salt gypsum is a sediment deposited on the seashore and is a by-product of salt production. The content of CaSO_4~·2H_2O is generally above 85%, which is equivalent to the national secondary standard (Jc16-82). The use of salt gypsum instead of natural gypsum as a retarder for the production of cement is technically feasible. Salt can be collected for every 100 grams of salt produced