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Bainite-based grinding medium as well as preparation method and application thereof

A grinding medium and bainite technology, which is applied in the field of bainite-based grinding medium and its preparation, can solve the problems of high energy consumption, complicated heat treatment process in the production process, poor matching of strength and toughness, etc., and achieves low energy consumption and improved Grinding economic benefits and improving the effect of strength and toughness matching

Pending Publication Date: 2022-08-05
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a bainite-based grinding medium and its preparation method and application, so as to solve the problems of poor matching of strength and toughness of the forging ball used in the grinding medium of the existing ball mill, complicated heat treatment process in the production process, and high energy consumption.

Method used

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preparation example Construction

[0024] The preparation method of the bainite-based grinding medium provided by the present invention is to optimize the metallographic structure through the Nb-Ti composite microalloying design and the forging-low temperature tempering heat treatment process, so as to improve the strength and toughness matching of the forged ball. Simple process, fast pace, high efficiency and low energy consumption. The bainite-based grinding medium provided by the invention has a metallographic structure mainly composed of bainite, and also has a martensite and carbon-rich retained austenite structure, and has high strength and high toughness. The bainite-based grinding medium of the present invention can be used as a grinding medium for forging balls in a ball mill, so that the service life of the forging balls can be prolonged, the ton consumption can be reduced, and the economic benefit of grinding can be improved.

[0025] An optional embodiment of the present invention provides a method...

Embodiment 1

[0041] A preparation method of a bainite-based grinding medium with medium carbon, high strength and high toughness, comprising:

[0042] 1) Based on Si-Mn-B bainitic steel, the composition system is designed by Nb-Ti composite microalloying. Smelting and adjusting the composition of molten steel to obtain molten steel, its composition: C 0.42%, Si 1.8%, Mn 1.7%, Nb0.05%, Ti 0.02%, Mo0.6%, Cr 1.0%, B 0.002%, N 0.0028 %, O 0.005%, P 0.007%, S 0.006%, and the balance is Fe.

[0043] 2) The round steel is obtained by continuous casting and rolling of molten steel, and the forging billet is obtained by cutting it according to the required size; the forging billet is heated, forged and formed, and the forged steel ball is quenched by water and rapidly cooled to 400 ℃, and then air-cooled to 400°C. room temperature. Among them, the diameter of the steel ball made is 50mm, the diameter of the round steel used: the diameter of the steel ball=1:1.6, and the length of the forging bill...

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Abstract

The invention discloses a bainite-based grinding medium as well as a preparation method and application thereof. The method comprises the following steps: smelting and adjusting molten steel components to obtain molten steel; wherein an Nb-Ti composite microalloying design component system is adopted; forging and forming the molten steel, and cooling to obtain a steel ball; and the steel balls are subjected to low-temperature tempering heat treatment, and the high-strength and high-toughness bainite-based grinding medium is obtained. The metallographic structure is synchronously optimized through alloying design, forging controlled cooling and low-temperature tempering heat treatment, the obdurability matching of the forged balls can be improved, the service life of the forged balls is prolonged, ton consumption is reduced, and the grinding economic benefit is improved; therefore, the problems of poor obdurability matching, complicated heat treatment process in the production link, high energy consumption and the like of the forging ball for the grinding medium of the existing ball mill are solved.

Description

technical field [0001] The invention relates to the technical field of grinding medium preparation, in particular to a bainite-based grinding medium and a preparation method and application thereof. Background technique [0002] Grinding and grading is an indispensable part of the beneficiation process and plays a key role in the technical indicators of the beneficiation process. The level of grinding efficiency is closely related to the economic benefits of beneficiation. The ball mill is one of the high-fine grinding machines widely used in the grinding process. The steel ball as the grinding medium is an indispensable partner for the movement of the ball mill. It is the implementer of the grinding operation and the transmitter of energy. Grinding fineness etc. play a crucial role. Steel balls are the main consumable parts for grinding, and the loss cost can reach 40% to 50% of the grinding cost. With the prosperity of the mining economy, the amount of ore processed has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21K1/02B02C17/10B02C17/20C22C33/06C22C38/34C22C38/38C22C38/04C22C38/26C22C38/28C22C38/22C22C38/32C21D9/36C21D6/00C21D1/18
CPCB21J5/002B21K1/02B02C17/10B02C17/20C22C33/06C22C38/34C22C38/38C22C38/04C22C38/26C22C38/28C22C38/22C22C38/32C21D9/36C21D6/005C21D6/002C21D6/008C21D1/18C21D2211/002
Inventor 陈曦代文彬陈学刚祁永峰王书晓
Owner CHINA ENFI ENGINEERING CORPORATION
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