Study on the influence of reagent consumption on fly ash floatation closed-circuit test
China,a country mainly relying on coal,inevitably results in environmental pollution during the development and utilization of coal.The predominant problem is the emission of fag-end,especially the emission of waste burnt cinders,which is the significant living rubbish in our country.At presen4 76% of the electricity power is generated by coal-fired plants.Each year coal for this purpose may he more than 0.8 billion tons,and It fly ash may be generated from 3-4t raw coal.The large-scale development of coal-based electricity power Industry causes the steep rise of fly ash emission,thus China is not only the biggest country of fly ash emission in the world,but also the most seriously-polluted country by fly ash.The disorderly pile of fly ash causes the pollution of air,water sources and land.In this paper,on basis of sampling from a fly ash piling dam in Guizhou and measuring the loss-on-ignition from sampling points,it carried out the floatation closed-circuit test.From results of the test,it found that the middlings treatment is the key to floatation decarburization and the utilization of the tailings after decarbonizing.Under different usage of reagent,the middlings returned for rough concentrates may give effects to the ignition loss of refined carbon;meanwhile,the amount of reagent used may also give great influence to the recovery of carbon.
Fly ash Closed-circuit test Middlings Floatation
Mao Song Zhang Qin Dai Wenzhi Nie Guanghua Wen DaZhi
Mining college of Guizhou University,Gui Yang 550003,China
国际会议
The 2007 International Conference on Mine Hazards Prevention and Control(2007矿山灾害预防与控制国际学术会议)
青岛
英文
77-82
2007-10-17（万方平台首次上网日期，不代表论文的发表时间）