The chemical name for the drug black dithiophosphoric phosphate. Commonly used are toluene-based black medicines, which are classified into No. 15 black medicine, No. 25 black medicine, and No. 31 black medicine because of the amount of phosphorus pentoxide added during the manufacture of the ingredients. In recent years, a successful trial of butylammonium black drug has been made.
Aerofloat used for flotation of copper sulphide ore containing pyrite, zinc and lead metals Cu, Zn ore plurality.
The characteristics of black medicine are: mostly dark green oily liquid, corrosive, slightly soluble in water, decomposed by heat, in addition to the collecting performance, there is foaming performance, its selectivity is good, the arrest of pyrite Poor ability to receive. It should be pointed out that black medicine is not easily decomposed in acidic pulp, and it is also difficult to oxidize. However, since a small amount of a vulcanizing agent such as H2SNa2S, which is a heavy oxidized ore, is dissolved therein, it is suitable to select a slightly oxidized sulfide ore with a black drug.
190. What kind of minerals are the main types of hydrocarbon acid collectors used for? What should you pay attention to when selecting?
Such collectors are less selective. It is mainly used for flotation of alkali metal ore (such as scheelite , fluorite , calcite , apatite, etc.), oxidized ore (such as hematite, cassiterite , etc.), silicate ore (such as quartz ). Because of its poor selectivity, it is necessary to add a conditioning agent during flotation to increase the selectivity of the agent, which is a problem to be paid attention to when applying the agent.
Precast refractory is made to retain its structure under high temperatures. In most cases, the materials are subjected to temperatures as high as 538 o C. The materials are applied as linings for furnaces, reactors, and kilns. In most cases, the refractory structures are designed for crucibles that are useful in molding and casting glass or metals as well as for flame deflectors. Focusing on the steel and iron industry, the use of precast refractory is recognized as the leading implementation when it comes to refractory production.
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