热分散处理条件对胶黏物分散与后续去除的影响

Heat Dispersion of Sticky Contaminants and Their Removal by Post-flotation

关键词:  热分散  胶黏物控制  大胶黏物  细小胶黏物  微细胶黏物

Key Words:heat dispersing  stickies control  macro-stickies  mini-stickies  micro-stickies

摘要:研究了热分散处理温度、齿盘间隙以及进浆浓度对浆中胶黏物的分散作用，同时检测了后浮选过程中胶黏物的去除效果。研究结果表明,热分散处理使大胶黏物和细小胶黏物得到了有效的分散，微细胶黏物以及胶体与溶解物质含量有所增加。提高处理温度、减小齿盘间隙或增加进浆浓度，都将促进大胶黏物和细小胶黏物的分散。在温度为100℃、齿盘间隙为0.3 mm、进浆浓度为30%的条件下，大胶黏物可降低大约92%，细小胶黏物可降低大约81%。由于大胶黏物被分散成为尺寸更为细小的成分，促进了胶黏物在后续浮选过程的有效去除，细小胶黏物的去除率达到25%~26%，微细胶黏物的去除率达到68%~70%。

Abstract:In this paper, effect of heat-dispersing by varying temperature, disc clearance, and pulp consistency on sticky substances was studied. Sticky substances including macro-, mini-, and micro-stickies were quantitatively investigated. Furthermore, their removal in the subsequent post-floatation was evaluated. The results showed that the dispersion efficiency of sticky substances can be improved significantly by raising temperature, reducing disc clearance, and increasing pulp consistency. Under temperature of 100℃, disc clearance of 0.3 mm, and pulp consistency of 30%, macro- and mini-stickies decreased by 92% and 83%, respectively. Due to being dispersed to a smaller size, removal of mini- and micro-stickies were improved in post-floatation to 25%~26% and 68%~70%, respectively.