Method for preparing ferronickel by using red mud and laterite-nickel ore

A technology of lateritic nickel ore and iron-nickel alloy, which is applied in the direction of fluidized bed furnace, etc., to achieve the effect of reducing the amount of slag, reducing the cost of reduction, and good effect

Active Publication Date: 2014-12-03
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the existing literature, the production and research of laterite nickel ore reduction smelting to produce iron-nickel alloys are all carried out with laterite nickel ore as the main raw material, adding reducing agent, flux and a small amount of additives, and there is no report yet. Adding some kind of solid residue to optimize its production process

Method used

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Examples

Experimental program
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Embodiment 1

[0031] A method for preparing iron-nickel alloy using red mud and laterite nickel ore, wherein the iron-nickel alloy is produced according to the following process steps:

[0032] 1) The selected raw materials are red mud, laterite nickel ore and coke powder. The main chemical composition of red mud: Fe 2 O 3 32.96%, Al 2 O 3 17.25%, CaO 14.73%, SiO 2 12.81%, Na 2 O4.06%; the main chemical composition of laterite nickel ore: Fe 16.62%, Ni 1.70%, MgO 17.18%, CaO 0.31%, SiO 2 40.12%, Cr 2 O 3 0.86%; the coke powder contains more than 85% of fixed carbon, ash content is less than 12.5%, sulfur content is less than 0.6%; the main chemical composition of bentonite is: SiO 2 67%, Al 2 O 3 13%, Fe 2 O 3 3%, Na 2 O4%, CaO3%.

[0033] 2) According to the mass ratio of (red mud: laterite nickel ore: coke powder: bentonite)=(100:60:10:3.4), weigh 10kg red mud, 6kg laterite nickel ore, and 1.0kg coke powder , 0.34kg of bentonite is mixed uniformly, and an appropriate amount of water is added, ...

Embodiment 2

[0036] A method for preparing iron-nickel alloy using red mud and laterite nickel ore, wherein the iron-nickel alloy is produced according to the following process steps:

[0037] 1) The selected raw materials are red mud, laterite nickel ore, coke powder, bentonite and polyvinyl alcohol. The composition of red mud, laterite nickel ore coke powder and bentonite is the same as that of Example 1;

[0038] 2) According to the mass ratio of (red mud: laterite nickel ore: coke powder: bentonite: polyvinyl alcohol) = (100:100:12:3:1), weigh the red mud and laterite nickel ore 10kg each, 1.2kg coke powder, 0.3kg bentonite, and 0.1kg polyvinyl alcohol are uniformly mixed, and an appropriate amount of water is added. The pellets are made into agglomerates with a ball press and dried naturally in flowing air.

[0039] 3) The dry agglomerates prepared by the above steps are sent to a 150kW submerged arc furnace for direct reduction smelting, the reduction temperature is raised to 1550°C, and t...

Embodiment 3

[0041] A method for preparing iron-nickel alloy using red mud and laterite nickel ore, wherein the iron-nickel alloy is produced according to the following process steps:

[0042] 1) The selected raw materials are red mud, laterite nickel ore, coke powder, and paper pulp waste liquid, and the composition of each raw material is the same as in Example 1.

[0043] 2) According to the mass ratio of (red mud: laterite nickel ore: coke powder: pulp waste liquid) = (10: 100: 7.3: 1.3), weigh the red mud 1kg, laterite nickel ore 10kg, coke Mix 0.73kg of powder and 0.13kg of paper pulp waste liquid, add appropriate amount of water, and form agglomerates with a ball press and dry naturally in flowing air.

[0044] 3) The dry agglomerates prepared by the above steps are sent to a 150kW submerged arc furnace for direct reduction smelting, the reduction temperature is raised to 1550°C, and the temperature is kept for 5-10 minutes, and then the iron-nickel alloy is obtained after removing the sla...

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Abstract

The invention provides a method for preparing ferronickel by using red mud and laterite-nickel ore. Meanwhile, a novel method is provided for recovery of iron in red mud and production of ferronickel from the red mud and the laterite-nickel ore. According to the method, iron-nickel reduction products in the red mud and the laterite-nickel ore are directly utilized, and low-cost ferronickel can be provided for stainless steel smelting production, ferroalloy casting and alloy steel production. The laterite-nickel ore also contains a little of chromium, and in the production method disclosed by the invention, chromium enters the iron-nickel alloy, so that beneficial chemical components of the iron-nickel alloy are enriched. The contained iron-nickel alloy produced by the method disclosed by the invention is iron-nickel alloy with low P and S content.

Description

Technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for preparing an iron-nickel alloy by using red mud and laterite nickel ore. Background technique [0002] Red mud is the residue formed after alumina is extracted from bauxite. The residue is rich in iron oxide and appears red, so it is called red mud. For every ton of alumina produced, about 0.8-2.0 tons of red mud are produced. Currently, the world produces about 90 million tons of red mud every year, of which nearly 30 million tons are produced in China. Red mud mainly contains Fe 2 O 3 , A1 2 O 3 , CaO, SiO 2 , TiO, Na 2 O and other components, the particle diameter is about 0.088-0.25mm, the melting point is about 1200-1250°C, and the pH value is about 10.0-13.0. [0003] At present, only a very small part of the red mud in the world is comprehensively used, and most of it is still sent to storage yards for open storage, which not only takes up a lot o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C21B13/00C22B4/06
Inventor 曾建民何奥平詹海鸿戴传智曹德光陈锡勇刘晨胡治流
Owner GUANGXI UNIV
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