摘要
以焦作某矿区无烟煤为研究对象,分析其矿物颗粒与煤颗粒的附着状态,研究磨矿时间对煤样粒径组成和矿物解离的影响,进而对浮选药剂制度与工艺条件进行优化,最终实现深度脱灰。实验结果表明当研磨时间为70 s时,所得煤样产品的D[4,3]和D[90]达到最小值,分别为21.61、52.37μm,实现煤与矿物的充分单体解离。通过对浮选药剂和工艺制度的优化,确定最佳单因素条件为:捕收剂用量1 500 g/t,起泡剂用量为800 g/t,抑制剂六偏磷酸钠500 g/t。最终在闭路实验中采用最佳浮选工艺流程,1次粗选4次精选,将原煤灰分由10.84%降至1.89%,产率为18.59%。
The research focused on anthracite from a mining area in Jiaozuo,analyzing the adhesion state of mineral particles and coal particles.The impact of grinding time on the particle size composition of coal samples and mineral dissociation was studied to optimize the flotation reagent system and process conditions,ultimately achieving deep deashing.Experimental results demonstrated that a grinding time of 70 s resulted in minimum values for D[4,3](21.61μm)and D[90](52.37μm),indicating sufficient monomer dissociation of coal and minerals.Through optimization of the flotation reagent and process system,optimal single factor conditions were determined as follows:collector dosage at 1500 g/t,foaming agent dosage at 800 g/t,and inhibitor as sodium hexametaphosphate at 500 g/t.Finally,the optimal flotation process was implemented in a closed-circuit experiment where one roughing followed by four cleaning stages reduced the ash content of raw coal from 10.84%to 1.89%,with a yield of 18.59%.
作者
侯迎港
邓小伟
吕波
房朝军
HOU Yinggang;DENG Xiaowei;LYU Bo;FANG Chaojun(College of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo 454003,China)
出处
《煤炭技术》
CAS
2024年第6期269-273,共5页
Coal Technology
基金
国家自然科学基金青年项目(51904096)。
关键词
无烟煤
深度脱灰
浮选
磨矿解离
碳达峰
anthracite
deep deashing
flotation
grinding dissociation
carbon peaking
