Method of reclaiming chemical industry products by using industrial slag containing vanadium, chromium, iron and phosphorous

Abstract

The invention discloses a recovering chemical product method with a V, Cr, Fe and P industrial muck in the chemistry field, which comprises the following steps: roasting raw materials; heating and leaching the clinkers; separating ferric oxide from the solution containing V, Cr, Fe and P; crystallizing the solution in order to removing to P; removing P deeply; removing Si; adjusting the acidity of the solution containing V and Cr; extracting V; extracting V reversely; settling V; roasting metammonium vanadate; reducing Cr; settling chromic hydroxide; separating chromic hydroxide from sodium sulfate; removing NH3; getting sodium sulfate crystallization; purifying sodium sulfate mother liquor; adsorbing V, Cr, tertiary sodium phosphate solution with rough tertiary sodium phosphate refining resin and reacting with phosphoric acid; drying and roasting sodium tripolyphosphate; getting V, Cr, Fe and P from the industrial muck containing V, Cr, Fe and P and separating the secondary product of ammoniacal liquor and sodium sulfate in the heat exchange procedure. The invention saves the energy, which adapts to an industrial appliance.

Description

technical field [0001] The invention proposes a method for recycling chemical products by using industrial slag containing vanadium, chromium, iron and phosphorus in the fields of chemical industry and environmental protection. Background technique [0002] Vanadium, chromium, phosphorus, and iron are all important non-renewable strategic resources, especially vanadium and chromium are widely used in special steel, alloy steel, military industry, aerospace, medicine, catalyst and other production and research fields. In 2005, my country's total iron and steel output exceeded 340 million tons, becoming the world's largest iron and steel country. [0003] The industrial slag containing vanadium and chromium mainly comes from the iron phosphorus slag produced in the phosphate fertilizer production process and the industrial slag from the impurity removal in the production of special steel smelting additives. my country's Panzhihua Iron and Steel Company and Chengde Iron and St...

AI Technical Summary

Problems solved by technology

[0004] Since the worldwide technical problem of vanadium and chromium separation in the same solution has not been solved so far, a large amount of vanadium and chromium-containing industrial slag can only be simply reduced and detoxified, then anti-seepage landfill or energy-consuming melting into phosphorus-iron slag

Not only does it cost a lot of money every year, but the waste residue that is simply detoxified is always threatening the environment

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