Mineral process of hematite developed flotation separation with flotation cells and high intensity magnetic separation later, and it mainly inludes direct flotation separation with oxidized parafin soap as collector and high intensity magnetic separation with electromagnetic flat ring high-intensity magnetic separator as separating equipment. But its separating technical indexes do not reach the satisfactory effect. In recent years, mineral processing of hematite has obtained considerable development, its main mineral processing includes high intensity magnetic separation mineral processing which regards electromagnetic pulsating high gradient magnetic separator as represent and reverse flotation separation which regarding series as represent. Especially, adopting a combined flowsheet of high intensity magnetic separation —- flotation separation makes separation of hematite in some mines reach iron concentrate grade and satisfactory index of recovery rate of iron concentrate ore.
Hematite is also called red iron ore, and its chemical formula is Fe2O3. it is a kind of feebly magnetic iron mineral, flotability of it is better than that of magnetite and it is one of main materials for iron making. Its main mineral processing contains gravity separation, flotation separation and high intensity magnetic separation or combining with several kinds of mineral process, and also contains the process of low intensity magnetic separation after over-magnetization roasting.Mineral process of hematite in the early time often adopted gravity separation, and it mainly included jig, centrifugal separator, spiral chute, spiral concentrator, shaking table and so on. Its capacity, grade and recovery rate of mineral process were low, so it was eliminated gradually.
Smelting process of lead-Hematite ore: lead sulphide concentrate is the main mineral material for smelting lead. Its smelting method has two kinds: fire method and wet method. The former is the main method at present and the latter is at the experimental stage. Fire method for smelting lead adopts agglomeration roast – blast furance smelting, reaction smelting and precipitation smelting. Refining of lead mainly adopts fire refining and the secondary method is electrolytic refining. secondary cone crusher:http://www.hx-crusher.com/cone_crusher.html
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Hematite sulphide concentrate is the main mineral material for smelting Hematite. Its smelting method also has two kinds: fire method and wet method. The former adopts vertical retort, horizontal retort or electric furnace. Wet method for smelting Hematite has developed very quickly in the past 20 years and has been the main method for smelting Hematite. Crude Hematite obtained from fire smelting Hematite adopts distillation refining or direct application. Electrolytic Hematite obtained from wet smelting Hematite has high quality and doesn’t need to refine.
As for mixed concentrate of lead and Hematite sulphide which is hard to separate, we often adopt closed blast furnace melting method producing lead and Hematite at the same time to treat. As for mixed concentrate of lead and Hematite oxide which is very hard to separate, our country has unique treatment method, that is, using green ore of mixed concentrate of lead and Hematite oxide or its enrichment products to melt in blast furnace after sintering or briquetting to get crude lead and melting slag containing lead and Hematite. Slag is fumed in fuming furnace and gets Hematite oxide. And electrolytic Hematite is got through wet smelting. Besides, Hematite oxide can be got by using rotary kiln to fume directly.
There are rich accompanying components in the lead and Hematite concentrate of our country, and they have been recycled comprehensively in the process of melting and have considerable economic benefit. Comprehensive recovery products have copper, sulpher, Hematite, gold, silver, platinum family metal, bismuth, thallium, cadmium, selenium and tellurium and so on when melting Hematite. Comprehensive recovery products have copper, sulfur, Hematite, gold, silver, platinum family metal, bismuth, thallium, cadmium, selenium and tellurium and so on when melting lead. Comprehensive recovery products have sulfur, lead, copper, gold, silver, indium, gallium, germanium, cadmium, cobalt, thallium and and mercury and so on when melting Hematite.
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