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Filling method of double-layer stuffing sand and application thereof

A filling method and drainage sand technology, which can be applied to casting melt containers, manufacturing tools, metal processing equipment, etc., can solve problems such as deterioration of molten steel cleanliness, aluminum loss, environmental pollution, etc., and reduce acid-soluble aluminum loss and pollution , the effect of improving the working environment

Active Publication Date: 2020-06-16
首钢股份公司迁安钢铁公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of which SiO 2 , Fe 2 o 3 、Cr 2 o 3 They are all low-level oxides. When the drainage sand enters the tundish, the aluminum dissolved in the molten steel will combine with these oxides SiO 2 , Fe 2 o 3 、Cr 2 o 3 Reaction occurs to form inclusions Al 2 o 3 , which deteriorates the cleanliness of the molten steel and causes the loss of aluminum in the molten steel during the pouring process, and also causes serious pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The concrete filling method of double-layer drainage sand of the present invention is:

[0026] When the ladle is empty, fill the upper nozzle of the ladle with drainage material, the upper layer of the drainage material is drainage sand A, wherein the drainage sand A is forsterite drainage sand (commercially purchased from Henan Tongyu Smelting Materials Group Co., Ltd. ); the lower layer of the drainage material is drainage sand B, wherein by weight percentage, the drainage sand B comprises: MgO 98.5%, SiO 2 0.55%, Fe 2 o 3 0.31%, C 0.55%, S 0.01%, H 2 O 0.08%; The number of times of use of the ladle upper nozzle is 12 times in the present embodiment, and the filling quality of this drainage sand B is 20kg, and the filling quality of described drainage sand A is 50kg; The granularity of this drainage sand B is 0.9mm; The particle size of drainage sand A is 0.9mm. The method of the invention reduces the burning loss of acid-soluble aluminum in molten steel by 30p...

Embodiment 2

[0028] The concrete filling method of double-layer drainage sand of the present invention is:

[0029] When the ladle is empty, fill the upper nozzle of the ladle with drainage material, the upper layer of the drainage material is drainage sand A, wherein the drainage sand A is silicon drainage sand (commercially purchased from Henan Tongyu Metallurgy Group Co., Ltd.) ; The lower layer of the drainage material is drainage sand B, wherein by weight percentage, the drainage sand B comprises MgO 98%, SiO 2 0.628%, Fe 2 o 3 0.6%, C 0.7%, S 0.012%, H 2 O 0.06%; The number of times of use of the ladle upper nozzle is 5 times in the embodiment, and the filling quality of this drainage sand B is 10kg, and the filling quality of described drainage sand A is 40kg; The granularity of this drainage sand B is 1.5mm; The particle size of quicksand A is 0.3mm. The method of the invention reduces the burning loss of acid-soluble aluminum in molten steel by 30ppm.

Embodiment 3

[0031] The concrete filling method of double-layer drainage sand of the present invention is:

[0032] When the ladle is empty, fill the upper nozzle of the ladle with drainage material, the upper layer of the drainage material is drainage sand A, wherein the drainage sand A is zirconium drainage sand (commercially purchased from Henan Tongyu Metallurgy Group Co., Ltd.) ; The lower layer of the drainage material is drainage sand B, wherein by weight percentage, the drainage sand B comprises MgO 99%, SiO 2 0.65%, Fe 2 o 3 0.292%, C 0.3%, S 0.008%, H 2 O 0.1%; The number of times of use of the ladle upper nozzle is 8 times in the embodiment, and the filling quality of this drainage sand B is 15kg, and the filling quality of described drainage sand A is 45kg; The granularity of this drainage sand B is 0.3mm; The particle size of quicksand A is 1.5mm. The method of the invention reduces the burning loss of acid-soluble aluminum in molten steel by 28ppm.

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Abstract

The invention provides a filling method of double-layer stuffing sand. The filling method of the double-layer stuffing sand comprises the following step that an upper gate of a steel ladle is filled with a drainage substance, is characterized in that the upper layer of the drainage substance is stuffing sand A, the stuffing sand A is selected from one or more than two of forsterite stuffing sand,silicon stuffing sand, zirconium stuffing sand or chromite stuffing sand, the lower layer of a drainage substance is a stuffing sand B, the stuffing sand B comprises the following components of, in percentage by weight, 98%-99% of MgO, 0.3%-0.65% of SiO2, 0.2%-0.6% of Fe2O3, 0.3%-0.7% of C, 0.008%-0.012% of S and 0.06%-0.1% of H2O. According to the filling method, under the condition that the automatic casting rate of the molten steel is not affected, inclusions in the molten steel are reduced, and pollution to the environment is relieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a filling method and application of double-layer drainage sand. Background technique [0002] With the development of science and technology, the requirements for steel properties are becoming increasingly strict, and the requirements for steel quality are constantly improving. Further reducing the content of inclusions in steel and improving the cleanliness of steel are one of the development directions of steel production at present. With the continuous development of new products, the purity of steel has become a bottleneck in the production of high-end metallurgical products. Therefore, the iron and steel industry is paying more and more attention to the purity of steel. How to reduce the content of inclusions in steel has become a problem for people. subject of increasing concern. The production process of steel is mainly divided into two parts: steelmaking a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/44B22D11/108
CPCB22D41/44B22D11/108
Inventor 刘春阳贾毅贾祥超安永超李春奇赵艳宇刘珍童刘道正
Owner 首钢股份公司迁安钢铁公司
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