Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization

A technology of vanadium-titanium-iron and slag-adjusting agent is applied in the field of iron and steel metallurgy, which can solve the problems of serious sulfur return in steelmaking furnaces, and achieve the effects of reducing iron loss, improving removal rate and broad application prospect.

Inactive Publication Date: 2008-03-26
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a special slagging agent for magnesium desulfurization of vanadium-titanium hot metal to

Method used

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  • Special-purpose slag adjusting agent for vanadium-titanium-iron-water-magnesium desulfurization

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1

[0015] Crush 70 parts of lime, 3 parts of fluorite, 9 parts of manganese ore, 4 parts of expanded graphite, 7 parts of calcium carbide, 11 parts of glass powder, 3 parts of MgO, and then use Raymond mill to further pulverize the raw materials to a particle size of 80% or less. 1mm and the maximum particle size does not exceed 10mm, and finally mixing to obtain the special slag regulator for the vanadium-titanium-iron-magnesium desulphurization.

[0016] The above prepared vanadium-titanium-iron-magnesium-specific slag regulator for desulphurization has been determined to contain 64.8% CaO and CaF 2 2.55%, containing MnO4.3%, containing expanded graphite 3.8%, containing SiO 2 8.1%, with CaC 2 4.7%, containing MgO 3.2%, containing Al 2 O 3 (Manganese ore contains Al 2 O 3 ) 3.2%.

Example Embodiment

[0017] Example 2

[0018] The slag control agent prepared in Example 1 was tested in the vanadium extraction steelmaking plant of Panzhihua Iron and Steel Co., Ltd. The slag control agent was added at 200kg / furnace, and each furnace of molten iron was about 130 tons. Each furnace was numbered 1, 2, 3, 4, and 5. The test results are shown in Table 2. In the table, Mg and lime are desulfurizers.

[0019] Steelmaking into the furnace [S] / %: the initial sulfur content of molten iron into the steelmaking furnace.

[0020] Steel making and pulling carbon [S] / %: Sulfur content of steel making and pulling carbon sampling.

[0021] Into the furnace ~ after desulfurization [S] / %: The difference between the initial sulfur content of steel-making entering the furnace and the sulfur content at the end of desulfurization. The smaller the value, the cleaner the desulfurization slag is removed, and the better the control effect of resulfurization.

[0022] Carbon pull-back after desulfurization [...

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Abstract

The present invention is desulfurizing and slag regulating agent for molten vanadium-titanium iron, and belongs to the field of ferrous metallurgy. The desulfurizing and slag regulating agent consists of CaO 55-70 weight portions, SiO2 7-15 weight portions, expandable graphite 1-6 weight portions, MnO 2-10 weight portions, MgO 2-10 weight portions, CaC2 1-20 weight portions, CaF2 1-4 weight portions and Al2O3 1-5 weight portions. The desulfurizing and slag regulating agent of the present invention has high desulfurizing slag eliminating rate, capacity of reducing the sulfur content from 0.035-0.120 % to about 0.005 %, lowered iron loss and broad application foreground.

Description

technical field [0001] The invention relates to a special slagging agent for desulfurization of vanadium, titanium and magnesium hot metal, which belongs to the field of iron and steel metallurgy. Background technique [0002] When smelting vanadium-titanium magnetite, when the ratio of vanadium-titanium magnetite in the blast furnace exceeds 15%, the TiO in the slag 2 After the content > 5%, there will be a prominent problem that the desulfurization ability of the slag will drop sharply, leading to a sharp increase in the sulfur content of pig iron. one of the tasks. Magnesium desulfurization agents are mostly used for desulfurization outside the vanadium-titanium hot metal furnace. For example, lime, calcium carbide, and metal magnesium are used as the main agent of the desulfurizer, and limestone, fluorite, and coke powder are used as auxiliary agents to form lime-based, calcium carbide-based, and magnesium-based agents. Compound desulfurizer. Because of its particu...

Claims

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Application Information

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IPC IPC(8): C21C7/064
Inventor 谭成英卓钧王石林杨素波黎光正解明科叶翔飞
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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