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Sintered calcium magnesium silicate refining slag for tire cord steel and preparing method thereof

A calcium magnesium silicate and refining slag technology, applied in the field of smelting, can solve the problems of uncontrollable form and quantity of non-metallic inclusions in cord steel, low steel quality, etc., and achieves low product cost, improved quality and simple process. Effect

Inactive Publication Date: 2019-03-08
WUHAN RUXING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The high-quality high-carbon steel used for steel cord cannot control the shape and quantity of non-metallic inclusions in the cord steel during the LF refining process, and the composite inclusions formed by non-metallic inclusions in the steel make the quality of the steel not high. Therefore, we propose a sintered calcium magnesium silicate refining slag for cord steel and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of sintered calcium magnesium silicate refining slag for cord steel, the weight percentage of its chemical composition is as follows: CaO 42%, MgO 15%, CaF 2 5%, SiO 2 35%, Al 2 o 3 2%, the total content of other impurities is 1%.

[0016] The present invention also proposes a preparation method of sintered calcium magnesium silicate refining slag for cord steel, comprising the following steps:

[0017] S1, prepare materials, select dolomite, fluorite and silica as raw materials, and control the content of dolomite CaCO in the selected raw materials 3 60-75%, MgCO 3 25-40%, Al 2 o 3 Not more than 2%; the content of fluorite powder CaF 2 Not less than 90%, Al 2 o 3 Not more than 2%; silica content SiO 2 Not less than 95%, Al 2 o 3 Not more than 2%;

[0018] S2. Pulverize the raw materials selected in S1, and the raw materials are pulverized into 120-mesh powders with a ratio of not less than 90%;

[0019] S3, after the completion of S2, the powd...

Embodiment 2

[0023] The present invention proposes a sintered calcium magnesium silicate refining slag for cord steel, the weight percent of its chemical composition is as follows: CaO 40%, MgO 12%, CaF 2 6%, SiO 2 40%, Al 2 o 3 1.5%, the total content of other impurities is 0.5%.

[0024] The present invention also proposes a preparation method of sintered calcium magnesium silicate refining slag for cord steel, comprising the following steps:

[0025] S1, prepare materials, select dolomite, fluorite and silica as raw materials, and control the content of dolomite CaCO in the selected raw materials 3 60-75%, MgCO 3 25-40%, Al 2 o 3 Not more than 2%; the content of fluorite powder CaF 2 Not less than 90%, Al 2 o 3 Not more than 2%; silica content SiO 2 Not less than 95%, Al 2 o 3 Not more than 2%;

[0026] S2. Pulverize the raw materials selected in S1, and the raw materials are pulverized into 120-mesh powders with a ratio of not less than 90%;

[0027] S3, after the com...

Embodiment 3

[0031] The present invention proposes a sintered calcium magnesium silicate refining slag for cord steel, the weight percentage of its chemical composition is as follows: CaO 39%, MgO 10%, CaF 2 7%, SiO 2 41%, Al 2 o 3 1%, the total content of other impurities is 4%.

[0032] The present invention also proposes a preparation method of sintered calcium magnesium silicate refining slag for cord steel, comprising the following steps:

[0033] S1, prepare materials, select dolomite, fluorite and silica as raw materials, and control the content of dolomite CaCO in the selected raw materials 3 60-75%, MgCO 3 25-40%, Al 2 o 3 Not more than 2%; content of fluorite powder CaF 2 Not less than 90%, Al 2 o 3 Not more than 2%; silica content SiO 2 Not less than 95%, Al 2 o 3 Not more than 2%;

[0034] S2. Pulverize the raw materials selected in S1, and the raw materials are pulverized into 120-mesh powders with a ratio of not less than 90%;

[0035] S3, after the completi...

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Abstract

The invention discloses sintered calcium magnesium silicate refining slag for tire cord steel. The slag comprises, by weight percent, 35 to 42% of CaO, 10 to 20% of MgO, 5 to 10% of CaF2, 35 TO 50% ofSiO2, not larger than 2% of Al2O3, and not larger than 4% of other impurities. The invention further provides a preparing method of the sintered calcium magnesium silicate refining slag for tire cordsteel. The form and the number of nonmetallic inclusions in the tire cord steel can be effectively controlled, the nonmetallic inclusions in the steel form low-melting-point plastic composite inclusions, the quality of the steel is improved, and the preparing method of the sintered calcium magnesium silicate refining slag can achieve continuous charging and discharging, simple process, uniform and stable component and low product cost.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a sintered calcium magnesium silicate refining slag for cord steel and a preparation method thereof. Background technique [0002] Steel cord is a fine-gauge steel wire strand or rope made of high-quality high-carbon steel with a brass-plated surface and a special purpose. Mainly used for car tires, light truck tires, heavy truck tires, construction machinery tires and aircraft tires and other rubber products skeleton materials. [0003] The high-quality high-carbon steel used for steel cord cannot control the shape and quantity of non-metallic inclusions in the cord steel during the LF refining process, and the composite inclusions formed by non-metallic inclusions in the steel make the quality of the steel not high. Therefore, we propose a sintered calcium magnesium silicate refining slag for cord steel and a preparation method thereof. Contents of the invention [0004] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076
CPCC21C7/076Y02P10/20
Inventor 刘星程益红郭城成
Owner WUHAN RUXING TECH CO LTD
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