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A kind of preparation method of nano-modified grinding ball

A technology of nano-modification and nano-modifier, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., which can solve the problem of affecting the uniform dispersion of grinding balls, the shortage of chromium alloy raw materials, and the unfavorable enhancement effect and other issues, to achieve the effect of low cost, lower production cost and high economic benefit

Active Publication Date: 2021-08-10
ANHUI RUITAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used grinding balls in cement enterprises are high-chromium cast iron grinding balls. However, due to the shortage of chromium alloy raw materials and high prices, the development of grinding balls with less chromium content and satisfactory performance has become the focus of current research.
Nano-additives can have a certain strengthening effect and improve the comprehensive mechanical properties of the grinding ball, but the nano-additive has surface effects such as small particles, high activity, and easy agglomeration, which affects its uniform dispersion in the grinding ball, which is not conducive to the strengthening effect play

Method used

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  • A kind of preparation method of nano-modified grinding ball

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of nano-modified grinding balls, comprising the following steps:

[0024] S1. Weigh the raw materials and smelt them at 1420°C to obtain molten iron. The molten iron includes the following chemical components in weight percentage: C: 2.6%, Si: 0.8%, Mn: 0.6%, Cr: 1.0%, Cu 0.3%, P : 0.5%, S: 0.3%, La 0.02%, Ce 0.03%, the balance is Fe;

[0025] S2, adding nano-modified iron powder equivalent to 0.2% of the weight of molten iron to the molten iron obtained in step S1, heat preservation treatment for 20 minutes, and then pouring to obtain a ball blank;

[0026] S3. Heat the ball green body to 620° C. for 1 hour, then air cool it to 60° C., then heat it to 180° C. and hold it for 1 hour, and air cool it to room temperature to obtain nano-modified balls.

[0027] Wherein the specific preparation method of the nano-modified iron powder is as follows: 100 parts by weight of reduced iron powder, 1 part by weight of polyethylene glycol and 5 parts by weight...

Embodiment 2

[0029] A preparation method of nano-modified grinding balls, comprising the following steps:

[0030] S1. Weigh raw materials and smelt them at 1440°C to obtain molten iron. The molten iron includes the following chemical components in weight percentage: C: 2.8%, Si: 0.95%, Mn: 0.65%, Cr: 1.2%, Cu 0.4%, P : 0.4%, S: ≤0.6%, Ce0.06%, La 0.02%, the balance is Fe;

[0031] S2, adding nano-modified iron powder equivalent to 0.4% of the weight of molten iron to the molten iron obtained in step S1, heat preservation treatment for 25 minutes, and then pouring to obtain a ball blank;

[0032] S3. Heat the ball green body to 650° C. for 1.5 hours, then air-cool to 800° C., then heat to 200° C. and hold for 1.5 hours, and air-cool to room temperature to obtain nano-modified balls.

[0033] Wherein the specific preparation method of the nano-modified iron powder is as follows: 100 parts by weight of reduced iron powder, 0.5 parts by weight of polyethylene glycol, 1 part by weight of poly...

Embodiment 3

[0035] A preparation method of nano-modified grinding balls, comprising the following steps:

[0036] S1. Weigh raw materials and smelt them at 1450°C to obtain molten iron. The molten iron includes the following chemical components in weight percentage: C: 3.0%, Si: 1.0%, Mn: 0.8%, Cr: 1.5%, Cu 0.5%, P : 0.8%, Cu 0.4%, S: ≤0.7%, La 0.1%, the balance is Fe;

[0037] S2, adding nano-modified iron powder equivalent to 0.5% of the weight of molten iron to the molten iron obtained in step S1, heat preservation treatment for 30 minutes, and then pouring to obtain a ball blank;

[0038] S3. Heat the ball green body to 660° C. for 2 hours, then air-cool to 100° C., then heat to 220° C. for 2 hours, and air-cool to room temperature to obtain nano-modified balls.

[0039] Wherein the specific preparation method of the nano-modified iron powder is as follows: 100 parts by weight of reduced iron powder, 2 parts by weight of polyvinylpyrrolidone and 5 parts by weight of nano-TiC, 5 parts...

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Abstract

The invention discloses a method for preparing nano-modified grinding balls, comprising the following steps: S1, weighing raw materials and smelting to obtain molten iron; S2, adding nano-modified iron powder to the molten iron obtained in step S1, and heat preservation for 20-30min , and then poured to obtain a grinding ball body, wherein the nano-modified iron powder is obtained by grinding the reduced iron powder, polymer dispersant and nano-modifier uniformly in absolute ethanol, and then carbonized at high temperature in an inert atmosphere Preparation; S3, heat-treating the grinding ball blank to obtain a nano-modified grinding ball. The invention has the advantages of low cost, simple process, and high comprehensive mechanical properties of the prepared grinding ball, which can meet the requirements of cement industrial application.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a preparation method of nano-modified grinding balls. Background technique [0002] Grinding balls are commonly used media in the cement industry for crushing materials. The microhardness of cement clinker is 450-580HV, and the mixed slag contains hard particles, and the microhardness is between 450-700HV. Therefore, the grinding balls used in the cement industry need to have sufficient hardness and toughness to make them in cement The material does not break under repeated impact. At present, the most commonly used grinding balls in cement enterprises are high-chromium cast iron grinding balls. However, due to the shortage of chromium alloy raw materials and high prices, the development of grinding balls with less chromium content and satisfactory performance has become the focus of current research. Nano-additives can have a certain strengthening effect and improve th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/06C22C33/08B22F9/04B22F1/00B82Y30/00B82Y40/00
CPCC22C37/10C22C37/06C22C33/08B22F9/04B82Y30/00B82Y40/00B22F2009/043B22F1/145
Inventor 蒋杰朱冬祥竺翠云周云霞
Owner ANHUI RUITAI NEW MATERIALS TECH
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