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

A method for extracting iron from high-iron and low-silicon laterite iron ore

A technology of laterite and iron ore, applied in the direction of improving process efficiency, etc., to achieve the effects of reducing emissions, improving blast furnace utilization coefficient, and low alkali consumption

Active Publication Date: 2018-11-09
ANSTEEL GRP MINING CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the deficiencies of the above-mentioned beneficiation methods, the technical problem to be solved by the present invention is to use the chemical beneficiation method to provide a kind of high-iron and low-silicon laterite iron with low cost, high recovery quality and efficiency, simple process, and good operability. The method of extracting iron from the ore realizes efficient separation of aluminum, silicon and iron in high-iron and low-silicon laterite iron ore, improves the iron grade before entering the furnace, reduces the content of Si, Al, S and other impurities entering the blast furnace, and improves the blast furnace Utilization factor, reducing the discharge of blast furnace slag, reducing the cost of ironmaking, improving the comprehensive utilization rate of laterite iron ore resources, and reducing environmental pollution

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
  • A method for extracting iron from high-iron and low-silicon laterite iron ore
  • A method for extracting iron from high-iron and low-silicon laterite iron ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 shown.

[0024] The mass content of Fe is 40.1%, SiO 2 The content is 2.98%, Al 2 o 3 The laterite iron ore with a content of 11.96% is placed in a NaOH alkali solution with a mass concentration of 55%, and is subjected to alkali leaching reaction in a closed container at a temperature of 120°C for 6.0 hours, and then the reactant is filtered to obtain an alkali leaching filter cake A and filtrate B, NaOH consumption 14.0 kg / t feed ore, its chemical reaction formula is:

[0025] al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0026] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0027] Filter cake A is the final iron ore concentrate obtained with a TFe content of 66.8%, in which SiO 2The content is 0.45%, Al 2 o 3 The S content is 0.96%, and the S content is 0.02%; the filtrate B is fed into the recycling system.

Embodiment 2

[0029] The TFe content is 49.8%, SiO 2 The content is 0.22%, Al 2 o 3 The laterite iron ore with a content of 8.10% is placed in a NaOH alkali solution with a mass concentration of 4%, and is subjected to alkali leaching reaction in a closed container at a temperature of 210°C for 0.3 hours, and then the reactant is filtered to obtain an alkali leaching filter cake A and filtrate B, NaOH consumption 10.36kg / t feed ore, its chemical reaction formula is the same as embodiment 1.

[0030] Filter cake A is the final iron ore concentrate obtained with a TFe content of 62.1%, in which SiO 2 The content is 0.08%, Al 2 o 3 The content of S is 0.87%, and the content of S is 0.01%; the filtrate B is fed into the recycling system.

Embodiment 3

[0032] The TFe content is 44.2%, SiO 2 The content is 2.54%, Al 2 o 3 The laterite iron ore with a content of 10.82% is placed in a NaOH alkali solution with a mass concentration of 50%, and the alkali leaching reaction is carried out in a closed container at a temperature of 200°C for 4.0 hours, and then the reactant is filtered to obtain an alkali leaching filter cake A and filtrate B, NaOH consumption 19.89kg / t feed ore, its chemical reaction formula is the same as embodiment 1.

[0033] Filter cake A is the final iron ore concentrate obtained with a TFe content of 67.90%, in which SiO 2 The content is 0.12%, Al 2 o 3 The content is 0.66%, and the S content is 0.01%; the filtrate B is fed into the recycling system.

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 a method for extracting iron from high-iron low-silicon type laterite ore. The method is characterized in that the laterite ore with the TFe content ranging from 40% to 50%, the SiO2 content being 0%-3% and the Al2O3 content being 8%-12% is placed into aqueous alkali, alkaline leaching reacting is carried out at 120 DEG C to 210 DEG C for 0.3 h to 6 h, reactants are filtered to obtain filter liquor and an alkaline leaching filter cake A, and the alkaline leaching filter cake A is iron ore concentrate with the TFe content ranging from 62% to 68%. The filter liquor B is fed into a recovery treatment system, and NaAlO2 in the alkaline leaching filter liquor is hydrolyzed to produce a by-product, namely Al(OH)3. By means of the method, effective separation of silicon, aluminum and iron is achieved, the grade of the iron ore concentrate is improved from 40%-50% to 62%-68%, meanwhile, the S content in the iron ore concentrate is smaller than 0.1%, and the SiO2 content and the Al2O3 content are both smaller than 1%, the content of impurities such as S, Si and Al entering a blast furnace is reduced, and the iron-making cost is reduced.

Description

technical field [0001] The invention relates to a beneficiation process of high iron and low silicon type laterite iron ore, in particular to a method for extracting iron from high iron and low silicon type laterite iron ore. Background technique [0002] Laterite iron ore is a typical tropical weathering-eluvial-residual deposit, mainly produced in the laterite weathering crust on the upper part of ultrabasic rock (peridotite), also known as weathering crust type laterite iron ore. The main minerals are needles. It is composed of iron ore, hematite and other hydrous iron oxide minerals, and its chemical composition is based on Fe 2 o 3 Characterized by high content. The types of laterite iron ore are not all the same around the world. It is a nickel-containing ore relative to nickel sulfide ore, and the main nickel-containing component in the ore is nickel oxide. A kind of laterite iron ore layer is widely distributed near the eastern coast of Morowali County, Central Su...

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 Patents(China)
IPC IPC(8): C22B1/00C22B1/11C22B3/12C22B21/00
CPCC22B1/00C22B1/11C22B3/12C22B21/0015Y02P10/20
Inventor 郭客王绍艳牛文杰徐锦海马艺闻乔思宇全名魏宋仁峰
Owner ANSTEEL GRP MINING CO LTD