Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing secondary reduced iron powder from iron ore concentrate

A technology for reducing iron powder and iron concentrate, which is applied in the field of reduced iron powder for powder metallurgy, can solve the problems of low equipment adaptability and raw material adaptability, and achieve a high degree of automation, convenient production scale, and low labor intensity of workers Effect

Inactive Publication Date: 2021-07-27
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Based on the above deficiencies, the object of the present invention is to provide a method for preparing reduced iron powder using ordinary iron concentrate, aiming to solve the technical problems of low raw material adaptability and low equipment adaptability in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing secondary reduced iron powder from iron ore concentrate
  • Method for preparing secondary reduced iron powder from iron ore concentrate
  • Method for preparing secondary reduced iron powder from iron ore concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of method utilizing common iron concentrate to prepare secondary reduced iron powder, specifically comprises the following steps:

[0034] (1) Material mixing: Prepare to weigh 100g of common iron ore concentrate (TFe=58%), 10g of anthracite, and 10g of pyrite, mix the materials in a mortar, fully grind to -200 mesh, and obtain the mixed material. The mixed material is placed in a graphite crucible, compacted and waits for roasting.

[0035] (2) Direct reduction (primary reduction): The material is heated and roasted in a box furnace at a reduction temperature of 1150° C. and a reduction time of 2 hours to obtain direct reduced iron (primary reduced iron).

[0036] (3) Crushing-grinding-magnetic separation: use crushing equipment to crush direct reduced iron (primary reduced iron) to -2mm, use a ball mill to grind the ore for 15 minutes, and the pulp concentration is 66%. A magnetic separator is used to magnetically separate the pulp to obtain low-sulfur primary...

Embodiment 2

[0041] This embodiment provides a method for preparing secondary reduced iron powder by using ordinary iron concentrate, referring to the operation steps of Example 1,

[0042] The difference with Example 1 is: in step (1), prepare to weigh 200g of common iron ore concentrate (TFe=62%), anthracite 20g, pyrite 20g; Secondary reduced iron powder index is shown in table 1 and table 2.

Embodiment 3

[0044] This embodiment provides a method for preparing secondary reduced iron powder by using ordinary iron concentrate, referring to the operation steps of Example 1,

[0045] The difference with Example 1 is: in step (1), prepare to weigh common iron ore concentrate (TFe=60%) 100g, anthracite 10g, pyrite 10g; Secondary reduced iron powder index sees table 1 and table 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of reduced iron powder for powder metallurgy, in particular to a method for preparing secondary reduced iron powder from iron ore concentrate. The method comprises the following steps of 1) mixing the iron ore concentrate, a reducing agent and a sulfur-containing additive, and uniformly stirring to obtain a mixed material; 2) reducing the mixed material obtained in step 1) to obtain primary reduced iron; 3) crushing the primary reduced iron obtained in step (2), and performing wet ore grinding-wet magnetic separation to obtain primary reduced iron powder; and 4) performing secondary reduction on the primary reduced iron powder obtained in step 3) to obtain secondary reduced iron; and crushing and grading the secondary reduced iron to obtain the secondary reduced iron powder. According to the method, common iron ore concentrate and other iron products are adopted as raw materials, so that a raw material source range is greatly expanded, the adaptability to resources is higher, and the production scale of the reduced iron powder is conveniently expanded.

Description

technical field [0001] The invention relates to the technical field of reduced iron powder for powder metallurgy, in particular to a method for preparing secondary reduced iron powder from iron concentrate. Background technique [0002] Reduced iron powder is an important industrial raw material, which has the characteristics of easy compression, strong magnetism, low price and uniform quality. Therefore, iron powder is widely used in powder metallurgy, soft magnetic materials, metal cutting, sewage treatment and other industries. Since 70%-80% of the total output of iron powder is used in the field of powder metallurgy, in recent years, with the rapid development of the automobile industry and lithium battery industry, the demand for iron powder has also increased. [0003] At present, the reduced iron powder is mainly prepared by using high-purity iron concentrate through the tunnel kiln Heganus process of external coal blending, mainly through the following technical sol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/14B22F9/22B22F9/04
CPCC21B13/146C21B13/008B22F9/22B22F9/04
Inventor 李永利姚广铮郭强齐涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI