摘要
通过摩擦电选技术对原煤灰分约20％,粒度小于0.074 mm,矿物质充分解离的微粉煤进行了干法分选试验,取得了精煤产率63.00％,灰分10.73％和尾煤产率36.80％,灰分32.98％的显著分选效果.试验表明:空气湿度增大后,精煤的产率有所下降,但通过增加极板的长度或提高电场强度,可保证精煤的产率,即摩擦电选过程对空气湿度变化的敏感性不大,主要决定于煤种的电选可造性;吸附在正、负极板上的颗粒主要集中在极板前段,说明物科摩擦带电充分,且正、负极板末端煤样的灰分相差不大,符合分选过程动力学规律.
The experiment of triboelectrostatic beneficiation was performed for the feed coal with an ash content of about 20%, a particle size of less than 0. 074 mm, and the mineral being liberated completely. The yield and the ash content of clean-coal are 63. 00% and 10. 73%, and that of the tailings are 36. 80% and 32. 98%, respectively. It also shows that the yield of clean coal reduces slightly with the increasing of the air's humidity. Whereas, the yield can be maintained by lengthening the plates or enhancing the electric-field's intensity. And the triboelectrostatic beneficiation is not too sensitive to the air's humidity and the effect mainly depends on triboeletrostatic characteristics of coal, and the particles are tribocharged completely because they are mainly absorbed on front parts of the plate and the ash content is almost the same, which conforms with the beneficiating dynamics.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2003年第6期674-677,共4页
Journal of China University of Mining & Technology
基金
国家高技术研究发展计划(863计划)项目(2002AA529120)
国家重大基础研究发展规划(973计划)项目(G1999022205-03)
关键词
摩擦电选
微粉煤
灰分
干法分选
triboelectrostatic beneficiation
dry beneficiation
fine-coal
