Latest ArticlesIn the blast furnace bag dust recovered from flue gas in ironmaking process, there are not only the iron, carbon and oxygen contained in solid charge, but also such valuable elements as zinc and lead in the form of oxide as well as potassium and sodium in the form of chloride. In view of the influences and economic value of these elements on ironmaking production, the experiment of “leaching of NH4Cl → replacement and impurity removal → electrolysis” for blast furnace bag dust is designed and carried out. As a result, the products of potassium ammonium chloride and zinc in line with national standard as well as the optimum conditions of leaching zinc and lead from blast furnace bag dust, precipitation of zinc in leachate, replacement and electrolysis are obtained.
Such problems as abnormal wear of such components as lining plate, uneven product particle size as well as short service life and high manufacturing cost of such components as lining plate, spider cap and head nut caused by uneven burden distribution of distributing device are found during the process of using Sandvik CH-870 crusher in Baoshan Mining Co. so that the frequency of maintenance and operating cost for crusher are high in the early stage of operation. In this paper, the working principle of Sandvik CH-870 crusher is introduced as well as its components such as distributing device, spider cap and head nut are improved combining with the actual situations on site. The operation of equipment is stable, processing capacity of crusher is obviously improved and operating maintenance cost is reduced with the improvement, which provides the references for other enterprises to introduce CH-870 crusher.
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