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A vanadium-containing iron water extraction vanadium dephosphorization agent

A technology of vanadium dephosphorization agent and dephosphorization agent, which is applied in vanadium-containing molten iron vanadium extraction dephosphorization agent, molten iron vanadium extraction dephosphorization field, can solve the problems of reduced vanadium extraction rate, high melting point of lime, serious temperature drop, etc., and achieve high Vanadium extraction rate and dephosphorization rate, effect of reducing dephosphorization load

Active Publication Date: 2015-11-18
CHONGQING UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the melting point of lime is relatively high, adding too much in the initial stage will cause difficulty in slag removal and severe temperature drop, which will not only adversely affect the dephosphorization of vanadium-containing molten iron, but also reduce the rate of vanadium extraction

Method used

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  • A vanadium-containing iron water extraction vanadium dephosphorization agent
  • A vanadium-containing iron water extraction vanadium dephosphorization agent
  • A vanadium-containing iron water extraction vanadium dephosphorization agent

Examples

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preparation example Construction

[0015] The preparation of the vanadium-containing hot metal extracting vanadium dephosphorization agent in the present invention involves the crushing and drying of raw materials, the preparation of the dephosphorizing agent and the vanadium extracting agent, and the preparation of the dephosphorizing agent to obtain a calcium ferrite dephosphorizing agent and a calcium ferrite dephosphorizing agent. Mixed with vanadium extractor. Each link will be described in detail below in the order of preparation.

[0016] 1. Selection and crushing of raw materials. Since the chemical components and proportions of the dephosphorization agent in the present invention are, Fe 2 O 3 45~55wt%, CaO35~47wt%, Al 2 O 3 2~5wt%, SiO 2 2 O 3 50~70wt%, Al 2 O 3 5~10wt%, SiO 2 5-20wt%, MgO5-15wt%; of course, these all contain appropriate amount of impurities, among which Al 2 O 3 All are flux. Therefore, the raw materials constituting the dephosphorization agent of the present invention ar...

example 1

[0031] According to the above preparation method of vanadium extracting and dephosphorizing agent, 9 groups of calcium ferrite dephosphorizing agents were prepared. The main parameters of its composition and preparation are shown in Table 2. At the same time, three groups of vanadium-extracting agents with different components were prepared, as shown in Table 3. The obtained calcium ferrite dephosphorization agent and vanadium extraction agent were prepared into 11 groups of vanadium extraction and dephosphorization agents according to the ratio of 1:0.5.

[0032]In an induction furnace equipped with 10kg of vanadium-containing molten iron (V0.3wt%, P0.08wt%), adding 40kg of vanadium-extracting and dephosphorizing agent per ton of molten iron, adding the above-prepared extractors of different compositions to the vanadium-containing molten iron. Vanadium dephosphorization agent. Table 4 shows the vanadium extraction and dephosphorization effect of vanadium extraction and deph...

example 2

[0040] According to the preparation method of the above-mentioned vanadium extracting and dephosphorizing agent, on the basis of Example 1, the roasting time of the calcium ferrite dephosphorizing agent was increased to 1 hour, and 9 groups of calcium ferrite dephosphorizing agents were prepared. The main parameters of its composition and preparation are shown in Table 5. The composition of vanadium extracting agent is shown in Table 3. The obtained calcium ferrite dephosphorizing agent and vanadium extracting agent were prepared according to the ratio of 1:1 to obtain 11 groups of vanadium extracting and dephosphorizing agent.

[0041] In an induction furnace equipped with 10kg of vanadium-containing molten iron (V0.28wt%, P0.09wt%), adding 50kg of vanadium-extracting and dephosphorizing agent per ton of molten iron, adding the above-prepared extractors of different compositions to the vanadium-containing molten iron. Vanadium dephosphorization agent. The composition of van...

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Abstract

The invention discloses a vanadium extraction and dephosphorizing agent for vanadium-containing molten iron. The preparation method comprises the following steps: (1) respectively preparing a dephosphorizing agent and a vanadium extraction agent, wherein the dephosphorizing agent comprises the following chemical components in percentage by weight: 45-55 percent of Fe2O3, 35-47 percent of CaO, 2-5 percent of Al2O3 and less than 4 percent of SiO2, and sintering the dephosphorizing agent at high temperature to generate a calcium ferrite dephosphorizing agent, wherein the vanadium extraction agent comprises the following chemical components in percentage by weight: 50-70 percent of Fe2O3, 5-10 percent of Al2O3, 5-20 percent of SiO2 and 5-15 percent of MgO; and (2) mixing the calcium ferrite dephosphorizing agent and the vanadium extraction agent according to a mass ratio of 1:(0.5-3), and mixing to obtain the vanadium extraction dephosphorizing agent. According to the vanadium extraction dephosphorizing agent, high vanadium extraction rate and dephosphorizing rate can be simultaneously obtained, the dephosphorizing load in the semi-steel steelmaking process is lightened, and vanadium slag and low-phosphorus semi-steel with qualified components are obtained.

Description

technical field [0001] The invention relates to a technology for extracting vanadium and dephosphorizing from molten iron, in particular to a vanadium extracting and dephosphorizing agent from molten iron containing vanadium, and belongs to the technical field of iron and steel metallurgy auxiliary materials. Background technique [0002] At present, vanadium in vanadium titanomagnetite in my country is mostly extracted by blast furnace ironmaking-converter double vanadium extraction process, that is, vanadium is extracted in one converter first, and then semi-steel is poured into another converter for semi-steel steelmaking. The produced vanadium slag converts low-valent vanadium into high-valent vanadium through subsequent oxidative roasting process, and then adopts wet leaching method to leaching pentavalent vanadium into the solution, and purifies vanadium precipitation to obtain vanadium product. However, the traditional vanadium slag sodium roasting-water leaching proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064C21C7/04
Inventor 谢兵张涛刘璇刁江李鸿乂
Owner CHONGQING UNIV
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