Combined sodium salt roasting method for vanadium-containing and chromium-containing raw materials
A technology for sodium roasting and raw materials, applied in the field of metallurgy and chemical industry, can solve the problems of high energy consumption, unsuitable for industrialized production, long process flow, etc., and achieve the effects of improving recovery rate, efficient extraction, and realizing joint production and extraction.
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Embodiment 1
[0031] A method for combined sodium roasting of vanadium-containing and chromium-containing raw materials of the present embodiment comprises the following steps:
[0032] Select vanadium slag (vanadium content 7.5%, chromium content 5.5%) and chromium-containing tailings (vanadium content 0.1%, chromium content 20.20%) produced in the iron and steel industry as the main raw materials, vanadium slag and chromium-containing tailings are mixed in a certain proportion, Then add the theoretical amount of 1.2 parts of sodium carbonate and 0.45 parts of sodium chloride for mixing. The mixed raw meal is put into the calciner for roasting, and the roasted clinker is kept at 875 ° C for 3-5 hours. The roasted clinker is passed through the sample making machine. Pulverize, keep most of the clinker fineness within the range of 80 mesh to 200 mesh, and add water of the same quality according to the quality of the clinker to carry out the leaching operation. Take away the residual vanadium...
Embodiment 2
[0034] A method for combined sodium roasting of vanadium-containing and chromium-containing raw materials of the present embodiment comprises the following steps:
[0035] Select vanadium extraction tailings (vanadium content 1.5%, chromium content 5.2%) and high chromium tailings (vanadium content 0.15%, chromium content 32.20%) produced in the vanadium extraction industry as the main raw materials, vanadium extraction tailings and high chromium tailings Mix according to a certain proportion, then add the theoretical amount of 0.8 parts of sodium carbonate and 0.75 parts of sodium sulfate for mixing, and put the mixed raw meal into the calciner for roasting, and keep roasting at 845 ° C for 4.5 hours. The sample making machine is crushed to keep most of the clinker fineness within the range of 80 mesh to 200 mesh. According to the quality of the clinker, water of the same quality is added to carry out the leaching operation. The residual vanadium and chromium compounds in the...
Embodiment 3
[0037] A method for combined sodium roasting of vanadium-containing and chromium-containing raw materials of the present embodiment comprises the following steps:
[0038]Select vanadium-containing steel slag (vanadium content 2.2%, chromium content 7.6%) and high-chromium tailings (vanadium content 0.15%, chromium content 32.20%) produced in the iron and steel industry as the main raw materials. Proportionally mixed, then add the theoretical amount of 75 parts of sodium carbonate, 0.45 parts of sodium sulfate, 0.6 parts of sodium chloride for mixing, the mixed raw meal is put into the calciner for roasting, and the roasting is kept at 795 ° C for 5 hours. The clinker is pulverized by the sample making machine to keep most of the clinker fineness within the range of 80 mesh to 200 mesh. According to the quality of the clinker, the same quality of water is added to carry out the leaching operation. The filtrate filtered for the first time is a high-concentration leachate. , was...
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