助磨剂在石英粉磨中的应用研究现状及发展趋势

Review of the Research Status and Development Trends of the Application of Grinding Aids in Quartz Grinding

粉磨作业在矿物加工领域具有重要地位,磨矿过程添加助磨剂是提高磨矿效率、增加磨机生产能力、降低磨矿能耗和钢耗的有效措施之一。论述了国内外常用助磨剂和新型助磨剂对石英粉磨的影响。在石英粉磨过程中加入适量的助磨剂可以改善粉磨效果,获得理想细度的产品。从降低硬度学说和调节矿浆流变学说2个代表性的观点论述了助磨剂的作用机理,表明加入助磨剂后,既会在矿石表面发生吸附达到降低硬度的效果,也会影响矿浆的流变学性质,且二者相互补充,只是主导作用不同而已。添加不同助磨剂对后续矿物分选行为影响不同。助磨剂的加入可以改变磨矿环境,简要说明了磨矿环境对矿物分选行为的影响及机理。从助磨剂的选择、新型高效助磨剂的研制和应用、助磨剂的复配、助磨剂与粉磨工艺参数的搭配、助磨剂作用机理、助磨剂对分选行为影响等6个方面,归纳总结出了助磨剂在石英粉磨中应用的发展趋势,指出研究助磨剂对后续矿物选别行为影响的重要性。

Grinding operation plays an important role in the field of mineral processing.The addition of grinding aids is one of the effective methods to improve grinding efficiency,increase mill production capacity,and reduce grinding energy consumption and steel consumption.The influence of common grinding aids and some new grinding aids on quartz grinding both at home and abroad were discussed.The grinding effect could be improved and obtain the product with ideal fineness by adding proper amount of grinding aids.The mechanisms of grinding aids were discussed from the two representative viewpoints of decreasing hardness theory and regulating pulp rheology theory.It was shown that both the hardness of minerals and the rheological properties of slurry would be affected by adding grinding aids.The two theories complement each other,but the dominant was different according to the situation.The addition of grinding aids had different effects on the subsequent separation behaviors.The grinding environment was changed by the addition of grinding aids.The effect of grinding environment on mineral separation and its mechanism were also briefly described.Based on the analysis of the existing literature,the development trends of the application of grinding aids in quartz grinding were summarized from the six aspects which were the selection of grinding aids,the development and application of new grinding aids with high efficiency,the compound of grinding aids,the matching of grinding aids and grinding process parameters,the effect mechanisms of grinding aids and the influence of grinding aids on the separation behavior.The important to study the effect of grinding aids on mineral separation behaviors were also pointed out.