煤用浮选剂技术要求指标的检测探讨

Investigation on detection of technical condition of flotation agent for coal

在煤炭清洁高效利用政策下,浮选药剂的发展极大影响煤泥浮选进程。主要探讨煤用浮选药剂技术要求指标的检测可行性,并分析浮选药剂的检测指标。经检测各项指标的对应性,发现标准主要是为规范煤炭分选过程中安全、环保、高效使用浮选剂。关键指标是药剂的闪点、毒性和浮选精煤数量指数、药耗系数,而其他7项指标为辅助。检测试验中发现,闪点选取≥60℃可保障药剂储运与使用的工作环境安全,同时闪点与VOCs的含量是呈反比;可吸入毒性与VOCs和苯含量、气味均有相关性;浮选精煤数量指数和药耗系数是反映浮选效率的指标,其试验结果的获取与数据评判至关重要。吸入毒性的评判定级与参考标准表述应一致。检测VOCs和苯含量的方法应以最佳药剂耗量下的煤浆来进行检测为宜。

The development of flotation agents greatly affects the process of slime flotation under the policy that is clean and efficient utilization of coal.It was mainly discussed that the feasibility of testing the technical requirements of flotation agents for coal.And it was analyzed that the use of detection index of flotation agents.It was found that the main purpose of the standard is to standardize the safe,environmentally friendly and efficient use of flotation agent in the coal process,through investigating the correspondence of each index.There are some key indexes,which flash point,toxicity,flotation cleaned coal quantity index and agents consumption coefficient,and other seven auxiliary indexes.It is found that the flash point≥60℃is selected to ensure the safety in the working environment of flotation agent storage,transportation and use.And the flash point is inversely proportional to the content of VOCs.The inhalable toxicity was correlated with odor of flotation agent and the content of VOCs and benzene.The indicators are reflected flotation efficiency that flotation cleaned coal quantity index and agent consumption coefficient.It is very important to obtain test results and evaluate data.The evaluation of inhalation toxicity should be consistent with the reference standard.It should be detected which VOCs and benzene content in coal slurry under the optimal agent consumption.