低品质天然石膏矿的选矿提纯试验研究
Experimental Study on Beneficiation and Purification of Low-quality Natural Gypsum Ore
郭霞1
作者信息
- 1. 咸阳非金属矿研究设计院有限公司,陕西 咸阳 712021
- 折叠
摘要
低质天然石膏矿的主要矿物成分为石膏,因含有部分凹凸棒黏土、石英、长石等杂质矿物,严重影响其矿物的应用领域和应用价值.因此,对低质天然石膏矿进行选矿提纯试验研究,采用"筛分—破碎—筛分—擦洗脱泥—智能分选"的选矿工艺提纯后,试样获得粒度2～10mm,CaSO4(以干基计)含量为98.36%,Pb含量为0.144mg/kg,As＜2.0mg/kg,氟化物(F)＜0.003%,Se＜0.003%,干燥减量为 20.3%的石膏精矿,满足食品添加剂用硫酸钙质量要求;同时获得粒度0.3～2mm,CaSO4·2H2O含量为 94.85%的石膏精矿,满足α型高强石膏用原料要求;尾矿可用于生产农肥或者用作土壤调理剂,实现了石膏资源的高附加值、综合利用.
Abstract
The main mineral component of low-quality natural gypsum ore is gypsum,which contains some impurity minerals such as attapulgite clay,quartz,feldspar,etc.,which seriously affects the application field and application value of its minerals.Therefore,the beneficiation and purification of low-quality natural gypsum ore was carried out in the experimental study,and after the beneficiation process of"Screening-crushing-screening-scrubbing-intelligent sorting"was adopted,the particle size of the sample was between 2～10mm,a CaSO4(on a dry basis)grade of 98.36%,a Pb grade of 0.144mg/kg,As<2.0mg/kg,fluoride(F)<0.003%,Se<0.003%,a drying reduction of 20.3%was obtained,which meets the quality requirements of calcium sulfate for food additives;Simultaneously obtain gypsum concentrate with a particle size between 0.3 and 2mm and a CaSO4·2H2O content of 94.85%,meeting the requirements of α Requirements for raw materials for high-strength gypsum;Tailings can be used for producing agricultural fertilizers or as soil conditioners.It has achieved high added value and comprehensive utilization of gypsum resources.
关键词
石膏矿/食品添加剂/高强石膏/擦洗/智能分选Key words
gypsum mine/food additives/high strength gypsum/scrub/intelligent sorting引用本文复制引用
基金项目
咸阳市重点研发计划(L2022-ZDYF-GY-007)
陕西省创新能力支撑计划(2024CX-GXPT-04)
出版年
2024
国家科技期刊平台
NSTL
万方数据