An acid-resistant tough high-wear cast ball and its preparation method

A high anti-wear and cast ball technology, applied in the field of casting, can solve the problems that ordinary cast balls and ultra-high chromium balls cannot meet the requirements of working conditions, increase production costs, and consume large grinding balls, so as to achieve good economic benefits and eliminate stress , Improve the effect of corrosion resistance

Active Publication Date: 2021-09-24
宁国东方碾磨材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Some mines, such as cobalt ore, have working conditions in a strong acid and high corrosion environment, and ordinary cast balls and extra-high chromium balls cannot meet the requirements of the working conditions.
At present, this kind of mine mainly uses stainless steel balls as grinding bodies. Although stainless steel balls are corrosion-resistant and can be used in strong acid and corrosion-resistant environments, their hardness is low, with HRC around 10, and the consumption of grinding balls is large, resulting in serious damage. waste, which greatly increases production costs

Method used

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  • An acid-resistant tough high-wear cast ball and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing an acid-resistant tough high-wear casting ball, comprising the following steps:

[0020] S1. Add steel scrap, recarburizer, ferrochromium, ferromanganese, ferrosilicon, ferronickel, and ferromolybdenum in sequence in the smelting furnace, and smelt at 1520-1540°C to obtain molten iron;

[0021] S2. Add 0.3kg / t aluminum ingots to the molten iron for deoxidation before it is released from the furnace, then transfer the molten iron to the transfer ladle, remove the slag and pour it into the pouring ladle, pour it at 1450°C, and obtain the billet after cooling ;

[0022] S3. Raise the temperature of the billet to 500°C for 2 hours, then raise the temperature to 780°C for 2 hours, then raise the temperature to 940°C for 2 hours, then raise the temperature to 1015°C for 2 hours, quench with quenching oil for 10 minutes, and finally keep the temperature at 260°C for 6 hours Tempering treatment is carried out to obtain acid-resistant, strong, tough and w...

Embodiment 2

[0025] A method for preparing an acid-resistant tough high-wear casting ball, comprising the following steps:

[0026] S1. Add steel scrap, recarburizer, ferrochromium, ferromanganese, ferrosilicon, ferronickel, and ferromolybdenum in sequence in the smelting furnace, and smelt at 1530°C to obtain molten iron;

[0027] S2. Add 0.4kg / t aluminum ingots to the molten iron for deoxidation before it is released from the furnace, then transfer the molten iron to the transfer ladle, remove the slag and pour it into the pouring ladle, pour it at 1500°C, and obtain the billet after cooling ;

[0028] S3. Raise the temperature of the billet to 500°C for 2 hours, then raise the temperature to 780°C for 2 hours, then raise the temperature to 950°C for 3 hours, then raise the temperature to 1030°C for 3 hours, quench with quenching oil for 12 minutes, and finally keep the temperature at 275°C for 7 hours Tempering treatment is carried out to obtain acid-resistant, strong, tough and wear-r...

Embodiment 3

[0031] A method for preparing an acid-resistant tough high-wear casting ball, comprising the following steps:

[0032] S1. Add steel scrap, recarburizer, ferrochromium, ferromanganese, ferrosilicon, ferronickel, and ferromolybdenum in sequence in the smelting furnace, and smelt at 1540°C to obtain molten iron;

[0033] S2. Add 0.5kg / t aluminum ingot to the molten iron for deoxidation before it is released from the furnace, then transfer the molten iron to the transfer ladle, remove the slag and pour it into the pouring ladle, pour it at 1520°C, and obtain the billet after cooling ;

[0034] S3. Raise the temperature of the billet to 510°C for 3 hours, then raise the temperature to 790°C for 3 hours, then raise the temperature to 950°C for 3 hours, then raise the temperature to 1030°C for 3 hours, quench with quenching oil for 15 minutes, and finally keep the temperature at 280°C for 8 hours Tempering treatment is carried out to obtain acid-resistant, strong, tough and wear-re...

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Abstract

The invention discloses an acid-resistant, tough, high-wear cast ball and a preparation method thereof. The preparation method comprises the following steps: S1, smelting in a smelting furnace to obtain molten iron; S2, adding aluminum ingots to the molten iron before being released from the furnace Carry out deoxidation, then transfer the molten iron to the transfer ladle, pour the slag into the pouring ladle for pouring, and obtain the cast slab after cooling; S3, raise the temperature of the cast slab to 500-510°C for 2-3h, and then raise the temperature to 780‑790°C for 2‑3h, then heated to 940‑950°C for 2‑3h, then raised to 1015‑1030°C for 2‑3h, quenched with quenching oil for 10‑15min, and finally kept at 260‑280°C for 6‑ 8h for tempering treatment, that is. The casting ball prepared by the invention not only has excellent acid and corrosion resistance, but also has high hardness and good wear resistance, which is beneficial to improving economic benefits.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to an acid-resistant, strong, tough and highly wear-resistant cast ball and a preparation method thereof. Background technique [0002] Some mines, such as cobalt ore, have working conditions in a strong acid and high corrosion environment, and ordinary cast balls and extra-high chromium balls cannot meet the requirements of the working conditions. At present, this kind of mine mainly uses stainless steel balls as grinding bodies. Although stainless steel balls are corrosion-resistant and can be used in strong acid and corrosion-resistant environments, their hardness is low, with HRC around 10, and the consumption of grinding balls is large, resulting in serious damage. waste, which greatly increases production costs. Therefore, it is necessary to develop an acid-resistant, tough and high-wear-resistant casting ball for mines that can be adapted to be used in a strong acid corrosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C22C33/08C21D1/18C21D9/36C22C38/02C22C38/04C22C38/44C22C38/60C22C37/10C22C37/08
CPCC21D1/18C21D9/36C22C33/006C22C33/06C22C33/08C22C37/08C22C37/10C22C38/02C22C38/04C22C38/44C22C38/60Y02P10/20
Inventor 赵金斌赵东凯明章林胡璇杨霄
Owner 宁国东方碾磨材料股份有限公司
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