青海盐湖提钾技术进展与我国钾肥工业的发展

发布时间：2019-05-06 07:45

【摘要】：青海盐湖钾盐资源利用率高低直接关系到我国钾肥工业的可持续发展。结合盐湖地质、地球化学、水盐体系相图理论等,研究了我国盐湖钾盐的"活"矿特性、光卤石生产氯化钾加工工艺以及低品位矿、尾矿综合利用重大技术创新等。研究成果表明,技术创新成果的转化应用使盐湖钾资源综合利用率由27%提升至74%,可采储量由过去的单一液体给水度储量变为给水度储量+固转液储量+固液转化驱动高品位持水度卤水被边界品位卤水置换储量+尾液返回综合利用量4部分。目前我国保有钾资源储量可保障国产钾肥需求量的60%,即年产1 000万吨实物量,服务年限可达40a,其中青海保有钾资源储量可维持800万t/a规模服务年限达40a以上。我国保有钾资源储量能够满足国产钾肥为主、进口补充、持续稳定的钾肥发展战略需求。
[Abstract]:The utilization rate of potash resources in Qinghai salt lake is directly related to the sustainable development of potash fertilizer industry in China. Combined with geology, geochemistry and phase diagram theory of salt lake, the "active" ore characteristics of potash salt in salt lake in China, the processing technology of producing potassium chloride from carnallite, the important technological innovation of comprehensive utilization of tailings and so on are studied. The research results show that the conversion and application of technological innovation results have raised the overall utilization rate of potassium resources in salt lakes from 27% to 74%. Recoverable reserves change from single liquid feed reserves to feed reserves solid-liquid conversion drives high-grade water-holding brine to be replaced by boundary grade brine reserves to return to the comprehensive utilization of four parts. At present, the reserves of preserved potassium resources in China can guarantee 60% of the demand for domestic potash fertilizer, that is, the annual output of 10 million tons of real materials and the service life can reach 40 years. Among them, the reserves of preserved potassium resources in Qinghai can maintain 8 million tons of potassium resources and have a service life of more than 40 years on a scale of more than 40 years. The reserves of potash resources in China can meet the strategic demand of potash fertilizer development, which is mainly domestic potash fertilizer, import supplement, and sustainable and stable.
【作者单位】：青海盐湖工业股份有限公司国家盐湖资源综合利用工程技术研究中心青海省盐湖资源综合利用重点实验室;
【分类号】：TQ443;TS396.1

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