Recycling process of vanadium in vanadium-containing steel slag
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A process and steel slag technology, applied in metallurgy and comprehensive utilization of solid waste, can solve the problems of high recycling cost and low yield, and achieve the effect of reduced recycling cost and high yield
Inactive Publication Date: 2019-02-01
盐边县向阳钒业有限公司
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[0004] The purpose of the present invention is to provide a recovery process of vanadium in vanadium-containing steel slag, which solves the technical problems of high recovery cost and low yield of vanadium-containing steel slag in the fire recovery process
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Embodiment 1-3
[0063] A recovery process for vanadium in vanadium-containing steel slag, comprising:
[0064] a. Ingredients, the specific material ratio is shown in Table 1.
[0065] b. Grinding: Put the recycled raw material obtained in step a into a ball mill for grinding and adjust the water content to make pellets.
[0066] c. Ball making: the grinding material obtained in step b is pressed into balls through a ball pressing machine.
[0067] d. Drying: put the spherical material obtained in process c into a cylinder dryer for drying.
[0068] e. Pre-reduction: put the dried material obtained in process d into the rotary kiln for pre-reduction treatment.
[0069] f. Smelting: Put the pre-reduced material obtained in process e into the submerged arc furnace, and add a certain amount of coke for smelting at the same time. See Table 1 for the amount of material.
[0070] g. Vanadium extraction: After smelting for a certain period of time, put the vanadium-containing molten iron obtained...
Embodiment 4-5
[0076] A recovery process of vanadium in vanadium-containing steel slag, the difference from the recovery process of Examples 1-3 is: the material ratio is shown in Table 2, the rotary kiln is cancelled, and the pre-reduction treatment in the operation e is carried out in the submerged arc furnace conduct.
[0077] The second material formula of table 2 (dry matter mass percent / %)
[0078]
[0079] It should be noted that the mass percentage of dry matter in Table 1 and Table 2 refers to the ratio of the dry matter mass of each component to the total dry matter mass of recycled raw materials, taking the total dry matter mass of recycled raw materials as a reference.
[0080] The yield of the recovery process of vanadium in the vanadium-containing steel slag provided in Examples 1-5 is analyzed with reference to relevant metallurgical examples, and under the situation of adjusting smelting temperature and smelting time, the recovery of vanadium and iron The rate can reach m...
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Abstract
The invention discloses a recycling process of vanadium in vanadium-containing steel slag and belongs to the technical field of metallurgy and solid waste comprehensive utilization. The recycling process comprises that recycled raw materials are subjected to pre-reduction treatment, and pre-reduced materials are obtained; the recycled raw materials comprise the vanadium-containing steel slag, irony raw materials, a modifying agent and a first carbon source reducing agent; the pre-reduced materials and a second carbon source reducing agent are smelted, and molten slag and vanadium-containing molten iron are separated; and the vanadium-containing molten iron is subjected to oxygen blowing vanadium extracting, and vanadium slag and vanadium-extracted molten iron are obtained. Smelting is performed after the pre-reduction process is adopted for performing pre-reduction treatment on the recycled raw materials, vanadium-titanium magnetite concentrate powder is adopted for the selectable irony raw materials so that the vanadium content can be improved, and ball milling pelletizing is performed before the selectable pre-reduction process so that the reaction dynamic condition can be provided. The technical problems that the vanadium-containing steel slag is high in recycling cost in the pyrogenic process recycling process, and low in yield are solved, the recycling cost is low, and theyield is high.
Description
technical field [0001] The invention relates to the technical field of metallurgy and solid waste comprehensive utilization, in particular to a recovery process for vanadium in vanadium-containing steel slag. Background technique [0002] In the prior art, in the process of using vanadium-titanium magnetite to extract vanadium through blast furnace smelting, a small amount of vanadium still remains in the molten iron after vanadium-containing molten iron extracts vanadium slag, which will produce about 7% of the steel output during the steelmaking process. % vanadium-containing steel slag, the content of vanadium in oxidized form in the slag is about 1-2%. Since the vanadium content is low and dispersed in the slag in the form of oxidation, it is difficult to utilize in depth. Due to the huge output of vanadium-containing steel slag, Panzhihua Iron and Steel alone discharges about 700,000 tons of vanadium-containing steel slag every year, and the total vanadium-containing r...
Claims
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