Method for producing fine powder of magnetite from active iron ore

A magnetite and iron ore technology, which is applied in the field of iron ore powder preparation, can solve the problems of high production cost, excessive impurities, and unsatisfactory magnetite, and achieve the effects of simple production, energy saving, and low cost

Inactive Publication Date: 2007-02-21
石启洁
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has following deficiencies: because live iron ore contains harmful substances such as sulfur, phosphorus, zinc, sodium, copper, gold, silicon, crystal water, mercury, magnesium at least, existing method can not remove these substances effectively, As a result, the magnetite produced cannot meet the standards promulgated by the state at all, for example:...

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with embodiment:

[0018] The present invention is carried out according to the following steps:

[0019] (1), crush live iron ore into crushed iron ore;

[0020] (2), the crushed iron ore in the above steps and the separation deoxidation accelerator are mixed uniformly in a ratio of 1: (1‰~5‰) by weight; the separation deoxidation accelerator is composed of marble powder, raw gypsum, Composed of stone powder, graphite, sodium chloride, Glauber's salt, and quicklime, their parts by weight are:

[0021] Marble powder: 50-80, raw gypsum: 60-90, nepheline powder: 200-400,

[0022] Graphite: 150-300, Sodium Chloride: 250-350, Glauber's Salt: 0.2-5,

[0023] Quicklime: 400-500;

[0024] The separation and deoxidation accelerator is mixed evenly with crushed iron ore in this way: dissolve the above-mentioned components with water, mix them into water after melting, and then mix them with crushed iron ore...

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

This invention discloses a method for manufacturing magnetite concentrate from active iron ore. The method comprised: (1) pulverizing active iron ore, mixing with separation-deoxygenation promoter at a weight ratio of 1: (0.001-0.005), and placing the mixture in an earth kiln or suspended kiln; (2) uniformly heating to 550-850 deg.C to calcine the active iron ore, taking out milling in a ball mill to obtain iron ore slurry; (3) performing magnetic separation by a magnetic separator, precipitating, filtering and drying to obtain magnetite separator, precipitating, filtering and drying to obtain magnetite concentrate. The method has such advantages as low cost and simple process, and can obviously reduce the contents of harmful substances such as S, P, Zn, Na, Cu, Si, crystalline water, Hg and Mg, and increase iron content to higher than 62%. The obtained magnetite concentrate can satisfy corresponding state standards, and can be used to manufacture high-quality steel.

Description

(1) Technical field [0001] The invention relates to a method for preparing iron ore powder, in particular to a method for magnetite fine powder. (two), background technology [0002] As we all know, magnetite can produce high-quality steel products. However, the resources of magnetite are very short at present, and it is far from meeting the needs of steelmaking plants. Mines are of great economic importance. The existing method of producing magnetite from live iron ore is: select raw ore containing sulfur and low phosphorus, then crush the raw ore into ore sand, and then evenly stir the ore sand and magnetite fine powder in a weight ratio of 1:1 At the same time, after forming into balls, machine burning is carried out, and the finished product is finished after machine burning. This method has following deficiencies: because live iron ore contains harmful substances such as sulfur, phosphorus, zinc, sodium, copper, gold, silicon, crystal water, mercury, magnesium at leas...

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
IPC IPC(8): C22B1/00C22B1/14B03C1/00
Inventor 石启洁
Owner 石启洁
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap