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Pollution-free recycling method of iron-based grinding waste material

A non-polluting technology for grinding waste, applied in the field of circular economy, can solve the problem of high cost of raw materials, and achieve the effects of high recycling rate, increasing thickness, and suppressing reaction temperature

Inactive Publication Date: 2012-06-06
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 200710075464.9 The main raw materials for preparing magnetic abrasives are: steel needles (0.5mm-2mm in diameter, 5mm-20mm in length), steel balls (0.5mm-2mm in diameter), ceramic powder (corundum, kaolin, silicon micropowder), The cost of raw materials used in this method is higher
The method of preparing magnetic abrasives from iron-based grinding waste has not been reported

Method used

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  • Pollution-free recycling method of iron-based grinding waste material
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The iron-based grinding waste and the surfactant sodium octyl sulfonate are uniformly mixed, and the mass ratio thereof is iron-based grinding waste: sodium octyl sulfonate is 100:1. After mixing evenly, add water to the mixed powder, stir and wash thoroughly. The washed grinding waste was taken out and baked in an oven at 200° C. for 2 hours to obtain iron-based alloy powder with TFe%=81.6%.

Embodiment 2

[0042] The iron-based grinding waste and the surfactant sodium octyl sulfonate are uniformly mixed, and the mass ratio thereof is iron-based grinding waste: sodium octyl sulfonate is 100:3. After mixing evenly, add water to the mixed powder, stir and wash thoroughly. The washed grinding waste was taken out and baked in an oven at 800° C. for 0.5 h to obtain iron-based alloy powder with TFe%=70.2%.

Embodiment 3

[0044] The iron-based grinding waste and the surfactant sodium octyl sulfonate are uniformly mixed, and the mass ratio thereof is iron-based grinding waste: sodium octyl sulfonate is 100:1. After mixing evenly, add water to the mixed powder, stir and wash thoroughly. The washed grinding waste was taken out and baked in an oven at 200°C for 2 hours to obtain an iron-based alloy powder with TFe%=81.6%, which was sieved to obtain -40~+400 mesh iron-based alloy powder. Mix the reducing agent Al powder and the sieved iron-based alloy powder evenly with a mass ratio of 1:3; put the mixed powder as the raw material of the SHS-lined steel pipe into a steel pipe with a diameter of 80 mm, a wall thickness of 4 mm, and a length of 150 mm. Fix the steel pipe on the pipe making machine, start the pipe making machine, and ignite the material with tungsten wire. After the reaction, a ceramic coating with a smooth surface and no cracks is formed on the inner wall of the steel pipe.

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Abstract

The invention provides a pollution-free recycling method of iron-based grinding waste material, belonging to the technical field of circular economy, and more particularly relating to the green circulating and recycling technology of the iron-based grinding waste material in the metallurgy industry. The recycling method of the iron-based grinding waste material comprises the steps of removing oil, heat treating, sieving and proportioning to obtain the iron-based alloy powder which can be used for an SHS lining steel tube, a powder metallurgy structural component, magnetic grinding and thermalspraying. The invention has the recovery rate of the iron-based alloy powder more than 95%, and the characteristics of wide raw material source, low cost, no secondary pollution, high circulating andrecycling rate and wide powder use.

Description

technical field [0001] The invention relates to a method for non-pollution reutilization of iron-based grinding waste generated during grinding or milling, and belongs to the technical field of circular economy. Background technique [0002] Powder metallurgy is a process in which metal powder (or a mixture of metal powder and non-metal powder) is used as a raw material to produce metal materials, composite materials and various types of products through forming and sintering processes. As an important metal raw material powder in the powder metallurgy industry, iron powder is widely used. But with the development of science and technology, the requirements for materials are getting higher and higher. The materials prepared by using pure iron powder can no longer meet people's needs. [0003] The composition and structure of the iron-based pre-alloyed powder are uniform, which can not only greatly improve the compressive and flexural strength of the iron-based powder metal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F3/12B22F3/23B22F7/04C23C4/08C09K3/14
CPCB22F5/106B22F3/23B22F9/00B22F8/00B22F7/08Y02W30/50Y02P10/20
Inventor 张深根刘波田建军潘德安李彬
Owner UNIV OF SCI & TECH BEIJING
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