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Deoxidizing piece for steel production and preparation method of deoxidizing piece

A technology of deoxidation block and deoxidizer, which is applied in the field of metallurgical industry, can solve the problems of slow diffusion deoxidation and poor deep deoxidation effect, and achieve the effects of low cost, environmental protection and high efficiency

Active Publication Date: 2015-06-24
丹阳龙江钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, silicon carbide and silicon are usually used for diffusion deoxidation, that is, silicon carbide or silicon is added to the slag to directly reduce the iron oxide content in the slag, and the iron oxide in the molten steel is gradually transferred to the slag by the effect of the distribution law. However, the speed of diffusion deoxidation is slow, and the effect of deep deoxidation is poor.

Method used

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  • Deoxidizing piece for steel production and preparation method of deoxidizing piece
  • Deoxidizing piece for steel production and preparation method of deoxidizing piece

Examples

Experimental program
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Effect test

preparation example Construction

[0022] The preparation method includes the steps:

[0023] 1. Separate the waste mortar from silicon wafer cutting into solid and liquid, and dry the solid components to obtain deoxidizer.

[0024] 2. Prepare a pig iron block with multiple holes.

[0025] 3. Put the deoxidizer and the pig iron block into a ball mill to rotate together, so that the deoxidizer is filled in the hole column to obtain the deoxidizer block.

[0026] The preparation method of the deoxidizing block utilizes the waste mortar generated in the process of cutting the crystalline silicon to realize resource recycling and utilization, which is beneficial to environmental protection. The prepared deoxidation block can allow silicon carbide and silicon to enter the inside of molten steel for deep deoxidation. The deoxidation method has high efficiency, low cost and simple operation.

[0027] In a more preferred solution, calculated by weight percentage, the chemical composition of the deoxidizer is: 80% to 90% SiC, 5%...

Embodiment 1

[0032] First, the waste mortar for silicon wafer cutting is subjected to solid-liquid separation, and the solid components are dried to obtain a deoxidizer. In this embodiment, calculated by weight percentage, the chemical composition of the prepared deoxidizer is 87% SiC, 6% Si, and 5% SiO 2 , 2% Fe.

[0033] Then, a pig iron block with a plurality of pore columns is prepared. In this embodiment, such as figure 1 with figure 2 As shown, the pig iron block 10 has a spherical shape with a diameter D of 5 cm. A plurality of hole columns 20 are evenly distributed in the spherical pig iron block 10. The hole diameter d of the hole column 20 is 5 mm, and the length of the hole column 20 is 2.3 cm. The volume of the plurality of hole columns 20 accounts for 40% of the volume of the entire pig iron block 10. In addition, a plurality of hole posts 20 extend from the center of the spherical pig iron block 10 to the surface of the spherical pig iron block 10, and have a radial structu...

Embodiment 2

[0038] The difference from Example 1 is: First, the chemical composition of the deoxidizer prepared in this example is: 80% SiC, 15% Si, 2% SiO 2 , 3% Fe. Next, the diameter D of the spherical pig iron block 10 is 6 cm. The hole diameter d of the hole column 20 is 10 mm, and the length of the hole column 20 is 2.8 cm. The volume of the plurality of hole columns 20 accounts for 45% of the volume of the entire pig iron block 10. The final prepared spherical pig iron block 10 has a density greater than 4g / cm 3 . The deoxidized block prepared in this embodiment is applied to steelmaking and has an effect similar to that in Embodiment 1.

[0039] In summary, compared with the prior art, the deoxidizing block for steelmaking provided by the present invention can make the deoxidizer enter the molten steel for deep deoxidation, with good deoxidation effect, and the final oxygen content in the molten steel can be controlled below 10 ppm. The chemical composition of the deoxidizing bloc...

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Abstract

The invention discloses a deoxidizing piece for steel production, comprising a pig iron piece body with a plurality of bore logs and a deoxidizing agent contained in the bore logs, wherein the deoxidizing agent is a solid component obtained after solid-liquid separation of waste slurry obtained from cutting silicon slices. The preparation method of the deoxidizing piece comprises the following steps: carrying out solid-liquid separation on the waste slurry obtained from cutting silicon slices and drying the solid component to obtain the deoxidizing agent; preparing the pig iron piece body with the plurality of bore logs; placing the deoxidizing agent and the pig iron body into a ball mill for rotation together to allow the deoxidizing agent fill the bore logs and obtain the deoxidizing piece. In the preparation method of the deoxidizing piece, the waste slurry produced during cutting crystalline silicon is utilized so that resource is recycled, and the environment is protected. With the obtained deoxidizing piece, silicon carbide and silicon can enter the interior of the liquid steel for deep deoxidization. The deoxidization method has the advantages of high efficiency, low cost and simple operation.

Description

Technical field [0001] The invention relates to the technical field of the metallurgical industry, in particular to a deoxidizing block for steelmaking and a preparation method thereof. Background technique [0002] With the rapid development of my country’s economy, the energy crisis has also increased. With its advantages, solar energy has become the first choice for people to solve the energy crisis. The application of solar energy technology requires high-purity crystalline silicon materials as the first choice. In the process of cutting crystalline silicon Need to add cutting slurry composed of silicon carbide and polyethylene glycol. As the cutting progresses, the sphericity coefficient, particle size, and particle size distribution of silicon carbide change, which ultimately results in insufficient cutting ability to become a waste slurry. The slurry contains a large amount of silicon carbide, causing a great waste of resources. [0003] Silicon carbide is a man-made materi...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 铁生年汪长安侯思懿王涛张晨光张钲
Owner 丹阳龙江钢铁有限公司
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