Vanadium-titanium-containing molten iron slag accretion agent and preparation method thereof
A technology of slag accumulating agent and molten iron, which is applied in the field of iron and steel smelting, can solve the problems of affecting the quality of steel, the slag adjusting agent has no spreadability, and complex components, etc., and achieves the effect of increasing the volume of slag block, simple composition, and easy preparation
Active Publication Date: 2021-03-26
SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
At present, the technical problem encountered by those skilled in the art is: when the molten iron after desulfurization pretreatment is poured into the converter for smelting, the desulfurization slag resulfurizes and the sulfur content in the molten steel is basically above 0.005wt%, which seriously affects the quality of the steel.
[0009]
Although the slagging agent or slagging agent disclosed in the above prior art can achieve the purpose of reducing the sulfur return of desulfurization slag and reducing the iron loss of slag removal, its components are relatively complicated, and it can be seen from the composition of the composition that the slagging agent does not It does not have the characteristics of good spreadability, and whether it can gather thin slag to form a larger slag block is not disclosed in the technical plan
Method used
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Embodiment 1
[0026] 20 parts of calcium oxide, 20 parts of aluminum oxide, 10 parts of porous silicon dioxide and 10 parts of fibrous gypsum particles are uniformly mixed, dried until the water content is 1.3-1.5%, and the slag accumulating agent is obtained.
Embodiment 2
[0028] 30 parts of calcium oxide, 30 parts of aluminum oxide, 20 parts of porous silicon dioxide and 10 parts of fibrous gypsum particles are uniformly mixed, dried until the water content is 1.3-1.5%, and the slag accumulating agent is obtained.
Embodiment 3
[0030] 40 parts of calcium oxide, 30 parts of aluminum oxide, 30 parts of porous silicon dioxide and 10 parts of fibrous gypsum particles are uniformly mixed, dried until the water content is 1.3-1.5%, and the slag accumulating agent is obtained.
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Abstract
The invention discloses a vanadium-titanium-containing molten iron slag accretion agent. The vanadium-titanium-containing molten iron slag accretion agent is characterized in that the slag accretion agent comprises the following raw materials including, by mass, 20-40 parts of calcium oxide, 20-40 parts of aluminum oxide, 10-30 parts of porous silicon dioxide and 10-20 parts of fibrous gypsum particles. The porous silicon dioxide is spherical particles, the average particle size is 1-2 mm, and the average size of the fibrous gypsum particles is 3-5 mm. An application method of the slag accretion agent comprises the steps that after desulfurization pretreatment of vanadium-titanium-containing molten iron, before slagging-off, the slag accretion agent is added, slagging-off is carried out, when slagging-off is carried out till the desulfurization slag amount is 20-30% of the original mass, the slag accretion agent is added for the second time, and slagging-off is carried out again. The slag accretion agent has good spreadability, can accrete dilute slag to form slag blocks with large sizes, and brings convenience to slagging-off.
Description
technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a vanadium-titanium molten iron slag accumulator, which can effectively reduce the iron loss of desulfurization and slag removal of vanadium-titanium molten iron, and at the same time reduce the amount of sulfur returned after desulfurization of vanadium-titanium molten iron. Background technique [0002] Vanadium-titanium-containing hot metal is usually obtained by blast furnace smelting. During the blast furnace tapping process, part of the blast furnace slag enters the molten iron tank along with the vanadium-titanium-containing hot metal. Therefore, there is generally a large amount of blast furnace slag in the vanadium-titanium-containing hot metal. The blast furnace slag carried by vanadium-titanium molten iron is vanadium-titanium blast furnace slag, which has a higher melting point, poor fluidity and more iron in the slag. However, after desulf...
Claims
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IPC IPC(8): C21C7/064
CPCC21C7/064Y02P10/20
Inventor 刘德安高华斌姜子文麦吉昌闵荣辉
Owner SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD