Wearable steel ball for producing ore pulp in mine, and preparation method thereof

A technology of wear-resistant steel and slurry, which is applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of not meeting the performance of slurry in mine operations, improve hardenability and surface hardness, promote hardenability, improve The effect of hardenability and hardness

Active Publication Date: 2018-12-18
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there are some wear-resistant steel balls that add a variety of microalloying elements to the steel, but the steel balls are forged from round steel; there are also some high-alloy steel balls that have good impact resistance and durability. Abrasiveness, but all can not reach the performance that mine operation pulp is used, also do not see the research report of wear-resistant steel ball and preparation method thereof for mine operation pulp described in this patented technology at present

Method used

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  • Wearable steel ball for producing ore pulp in mine, and preparation method thereof
  • Wearable steel ball for producing ore pulp in mine, and preparation method thereof
  • Wearable steel ball for producing ore pulp in mine, and preparation method thereof

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preparation example Construction

[0026] The preparation method of wear-resistant steel balls for producing ore pulp in mines of the present invention comprises the following process steps:

[0027] A. Molten steel smelting: Put molten iron, high-quality steel scrap and low-phosphorus-sulfur pig iron into a 120-ton LD converter for conventional top-bottom composite blowing, respectively at 25.0-30.0kg / t 钢 , 20.0~25.0kg / t 钢 , 1.0~2.0kg / t 钢 Adding lime, lightly burned dolomite and magnesite balls to make slag, controlling the carbon content at the end point ≥0.10wt%, tapping temperature ≤1640°C; adding active lime to the bottom of the ladle before tapping for slag washing, the amount of lime added 2.5kg / t 钢 ;The whole process of bottom blowing argon is adopted when tapping, and the flow rate of argon is controlled at 15-20NL / min;

[0028] B. Deoxidation alloying: Tap out the molten steel smelted in step A. When the amount of molten steel in the ladle is greater than 1 / 4, follow the following deoxidation alloy...

Embodiment 1

[0053] A, molten steel smelting: molten iron (chemical composition C 4.0wt%, Si 0.20wt%, Mn 0.40wt%, P 0.080wt%, S0.020wt%, the rest is Fe and unavoidable impurities), high-quality steel scrap ( Chemical composition C 0.16wt%, Si 0.12wt%, Mn 0.45wt%, P 0.015wt%, S 0.018wt%, the rest is Fe and unavoidable impurities) and low phosphorus sulfur pig iron (chemical composition C 3.2wt% , Si 0.30 wt%, Mn 0.30wt%, P 0.070wt%, S 0.020wt%, the rest are Fe and unavoidable impurities) into a 120-ton LD converter for conventional top-bottom compound blowing, respectively according to 25.0 kg / t 钢 、20.0kg / t 钢 、1.0kg / t 钢 Adding lime, lightly burned dolomite and magnesite balls to make slag, controlling the C content at the end point to 0.13wt%, and tapping temperature at 1630°C; before tapping, add active lime to the bottom of the ladle for slag washing, and the amount of lime added is 2.5kg / t 钢 ; The whole process of bottom blowing argon is adopted when tapping, and the flow rate of arg...

Embodiment 2

[0070] A, molten steel smelting: molten iron (chemical composition C 4.3wt%, Si 0.30wt%, Mn 0.58wt%, P 0.100 wt%, S0.032wt%, the rest is Fe and unavoidable impurities), high-quality steel scrap ( Chemical composition C 0.20wt%, Si 0.18wt%, Mn 0.58wt%, P 0.026wt%, S 0.027wt%, the rest is Fe and unavoidable impurities) and low phosphorus sulfur pig iron (chemical composition C 3.3wt% , Si 0.40wt%, Mn 0.40wt%, P 0.080wt%, S 0.027wt%, and the rest are Fe and unavoidable impurities) into a 120-ton LD converter for conventional top-bottom composite blowing, respectively according to 27.0 kg / t 钢 、22.0kg / t 钢 、1.6kg / t 钢 Adding lime, lightly burned dolomite and magnesite balls to make slag, controlling the end point C content to 0.12wt%, and tapping temperature at 1635°C; before tapping, add active lime to the bottom of the ladle for slag washing, and the amount of lime added is 2.5 kg / t 钢 ; The whole process of bottom blowing argon is adopted when tapping, and the flow rate of argo...

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Abstract

The invention discloses a wearable steel ball for producing ore pulp in a mine, and a preparation method thereof. The wearable steel ball is obtained in the mode that molten iron is subjected to the steps of molten steel smelting, deoxidation alloying, molten steel LF refining, molten steel casting, steel billet heating, rolling, reducing / sizing, flying shear double dimension segmentation, cooling, shear to length, wearable steel round rod product forming and ball manufacturing. The produced wearable steel ball for producing the ore pulp in the mine has the advantages of being high in surfacehardness (the Rockwell hardness HRC is 46-50), good in wearable property, excellent in impact-resistant and crack-resistant property (carbon is moderate), long in service life and the like.

Description

technical field [0001] The invention belongs to the technical field of metal materials and metal pressure processing, and in particular relates to a wear-resistant steel ball for mine pulp production and a preparation method thereof. Background technique [0002] At present, the iron ore in large-scale metallurgical mines in China is mined and transported from the underground, and then it is mined, sorted and cleaned. Most of the subsequent processes use advanced large-scale special professional ball mill equipment to grind the concentrate into fine powder slurry, which is beneficial to the pressure of the slurry pipeline. Long-distance transport. At present, in the process of operating special large-scale ball mills, it is necessary to regularly add (or supplement) wear-resistant steel balls with different diameters. The current wear-resistant steel balls usually use Q345, 45 steel, 60 steel, 70 steel, 60Si2Mn or medium-high carbon alloy steel Round bar forging (large diam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/28C22C38/32C21C7/06C21D8/06C21D1/18C21D9/36
CPCC21C7/06C21D1/18C21D8/065C21D9/36C21D2211/008C22C38/002C22C38/02C22C38/04C22C38/28C22C38/32Y02P10/20
Inventor 邓家木陈伟张卫强李德贵王文锋苏灿东文玉兵
Owner WUKUN STEEL
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