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Novel liquid steel refining fluxing slag

A technology for assisting slag and molten steel, which is applied in the field of iron and steel smelting, can solve the problems of reducing the service life of ladles, increasing processing costs, and long slag turning time, so as to avoid environmental pollution, shorten slag turning time, and reduce costs.

Inactive Publication Date: 2011-03-23
营口晟尔冶金新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: the slagging time is 20 minutes, and the slagging time is long, resulting in an increase in processing costs
At the same time, fluorite has an erosive effect on the ladle lining, which reduces the service life of the ladle and causes pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) molten steel refining flux slag is made of the following raw materials in proportions by weight,

[0018] 1 part of boron mud, 0.8 part of limestone powder,

[0019] Bauxite powder 0.5 part, sodium silicate 0.02 part.

[0020] Technical index of boron mud: B 2 o 3 The content is 2.5%;

[0021] Technical indicators of limestone powder: CaCO 3 52%, SiO 2 1.5%, P 0.005%, S 0.023%;

[0022] Technical index of bauxite powder: Al 2 0 3 79%, Fe 2 o 3 1.8%;

[0023] The particle size of boron mud, limestone powder and alumina powder is less than 5mm.

[0024] (2) The preparation method of molten steel refining flux slag is as follows:

[0025] 1) Dry the boron mud at 150-300°C for 3 hours to drain the moisture and control the moisture to less than 2.0%;

[0026] 2) Mix 1 part of dried boron mud with 0.8 part of limestone powder and 0.5 part of alumina powder;

[0027] 3) Add 0.02 parts of sodium silicate to the uniformly mixed material, and use a ball pres...

Embodiment 2

[0032] (1) molten steel refining flux slag is made of the following raw materials in proportions by weight,

[0033] 1 part of boron mud, 0.5 part of limestone powder,

[0034] Bauxite powder 0.3 part, sodium silicate 0.01 part.

[0035] (2) The preparation method of molten steel refining flux slag is as follows:

[0036] 1) drying the boron mud to remove moisture, so that the moisture of the boron mud is less than 2.0%;

[0037] 2) Boron mud after drying is mixed with limestone powder and alumina powder according to the above-mentioned proportioning by weight;

[0038] 3) Add sodium silicate to the uniformly mixed material, press the ball, and dry;

[0039] 4) Pack after natural cooling.

[0040] The main technical indicators of the product are shown in Table 1

Embodiment 3

[0042] (1) The melting slag for molten steel refining is made of the following raw materials in proportions by weight,

[0043] 1 part of boron mud, 1.0 part of lime powder,

[0044] Bauxite powder 0.7 part, sodium silicate 0.1 part.

[0045] Technical index of boron mud: B 2 o 3 The content is 2.7%;

[0046] Technical indicators of lime powder: CaO 89.2%, SiO 2 2.54%, P 0.013%, S 0.032%;

[0047] Technical index of bauxite powder: Al 2 o 3 79%, Fe 2 o 3 1.8%;

[0048] The particle size of boron mud, lime powder and alumina powder is less than 5mm.

[0049] (2) The preparation method of molten steel refining flux slag is as follows:

[0050] 1) Dry the boron mud at 150-300°C for 3 hours to drain the moisture and control the moisture to less than 2.0%;

[0051] 2) Mix 1 part of dried boron mud with 1.0 part of lime powder and 0.7 part of alumina powder;

[0052] 3) Add 0.1 part of sodium silicate to the uniformly mixed material, and mechanically press it into ba...

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Abstract

The invention relates to novel liquid steel refining fluxing slag. The invention adopts the technical scheme that the novel liquid steel refining fluxing slag comprises the following raw materials by weight part: 1 part of boric sludge, 0.5-1.0 part of limestone powder or lime powder, 0.3-0.7 part of alumina powder and 0.01-0.1 part of sodium silicate. A preparation method of the novel liquid steel refining fluxing slag comprises the following steps: drying the boric sludge to remove water; uniformly mixing the dried boric sludge with the limestone powder or the lime powder and the alumina powder by the weight part; adding the sodium silicate to an obtained uniformly mixed material, pressing the material into balls and drying. The invention sufficiently utilizes the waste boric sludge, and not only reduces the production cost, but also protects environment and shortens slagging time.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a new material added to molten steel to improve the refining effect when the molten steel in a steelmaking plant is processed in an out-of-furnace refining device. Background technique [0002] Before the molten steel in the steel mill enters the steelmaking furnace, it must be refined. The commonly used method is: the molten steel is pretreated in the refining device outside the furnace (LF furnace), adding fluorite and refining solvent to the LF furnace, and accelerating the melting of the refining solvent through fluorite. The disadvantages are: the slagging time is 20 minutes, and the slagging time is long, resulting in an increase in processing cost. At the same time, fluorite has an erosive effect on the ladle lining, which reduces the service life of the ladle and pollutes the environment. [0003] In addition, enterprises producing borax and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 谢磊
Owner 营口晟尔冶金新材料有限公司
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