Preparation Of Poly-silicate-ferric And Its Application In Coal Flotation By Tilt-type Flotation Column

In recent years, inorganic macromolecule compound is a hotspot of flocculant research area, of which the Poly–Silicate-Ferric is a major object of study, mainly used in wastewater treatment,black water treatment ,and even coal preparation by some researchers, and showed some results from them. However, one more severe problem of inorganic flocculants which have existed is their stability.The current practice is appending other elements to it so as to enhance its stability. In this study, without appending other elements, but by optimizing its preparation conditions, the storage life of Poly–Silicate-Ferric liquid was prolonged from the general 1 to 2 months to 9 months or more, so its stability was enhanced .Here,inorganic macromolecule flocculant Poly–Silicate-Ferric which was maded by my own was applied to coal flotation as a flotation additive , its effects on the impact of coal flotation was studied.It has been proved that Poly–Silicate-Ferric can increase of 13 percent the yield, has some right effects on ash doffing,but has some negative impacts on desulfurization.Fine coal treatment is the nodus of coal preparation industry.jigging ,dense-mediu-m separation and so on,all these majer coal preparation metheds have a problem that is the lower limit of separation. Dissociation of minerals from coal is sufficient in fine coal , so it provides a good condition for the desulfurization and ash debasing. Attac-hing importance to and enhancing the separate impact of fine coal preparation is one of the important ways by which to reduce the sulfur and ash content of the total clean coal, and to debase the pollution grade of the coal combustion. Fine coal is in a large proportion in the majority of coal preparation plantes ,but its ash content is only 2 to 4 percentage higher than the eligible clean coal. Effective preparation aimed at this part coal by appropriate methods based their own nature,, will have good ec o-nomic and social benefits. In this paper, fine coal is dealed with through desulfurization and ash debasing with the use of home-made equipment "tilt-type flotation column" , the effects of different factors on the impact of flotation was discussed. The best technology is selected through the orthogonal experiment, cleaned coal whose ash conte-nt is close to 2% is gained through the best technology after 3 times flotation process.