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A kind of method that utilizes red mud and laterite nickel ore to prepare iron-nickel alloy

A technology of laterite-nickel ore and iron-nickel alloy, applied in furnaces, furnace types, fluidized bed furnaces, etc., to achieve the effect of reducing the amount of slag, reducing the reduction cost, and achieving good effects

Active Publication Date: 2017-01-04
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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  • A kind of method that utilizes red mud and laterite nickel ore to prepare iron-nickel alloy
  • A kind of method that utilizes red mud and laterite nickel ore to prepare iron-nickel alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of method utilizing red mud and laterite nickel ore to prepare iron-nickel alloy, wherein, described 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 components of red mud are: Fe 2 o 3 32.96%, Al 2 o 3 17.25%, CaO14.73%, SiO 2 12.81%, Na 2 O4.06%; the main chemical composition of laterite nickel ore: containing Fe16.62%, containing Ni1.70%, MgO17.18%, CaO0.31%, SiO 2 40.12%, Cr 2 o 3 0.86%; coke powder contains more than 85% fixed carbon, ash content: less than 12.5%, sulfur content 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) to prepare ingredients, weigh 10kg of red mud, 6kg of laterite nickel ore, and 1.0kg of coke powder , 0.34 kg...

Embodiment 2

[0036] A kind of method utilizing red mud and laterite nickel ore to prepare iron-nickel alloy, wherein, described 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. Wherein the composition of red mud, laterite nickel ore coke powder and bentonite is identical with embodiment 1;

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

[0039] 3) Send the dry agglomerate obtained by the above steps into a 150kW submerged arc furnace for direct reduc...

Embodiment 3

[0041] A kind of method utilizing red mud and laterite nickel ore to prepare iron-nickel alloy, wherein, described iron-nickel alloy is produced according to the following process steps:

[0042] 1) The selected raw materials are raw materials such as red mud, laterite nickel ore, coke powder and pulp waste liquid, and the components of each raw material are the same as those 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) mass proportioning, weighing 1kg of red mud, 10kg of laterite nickel ore, coke Powder 0.73kg, pulp waste liquid 0.13kg, mix evenly, and add appropriate amount of water, use a ball press machine to make agglomerates, and then dry naturally in the flowing air.

[0044] 3) Send the dry agglomerate obtained by the above steps into a 150kW submerged arc furnace for direct reduction smelting, the reduction temperature rises to 1550°C, keep warm for 5-10min, and then come out...

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Abstract

The present invention provides a method for preparing iron-nickel alloy by utilizing red mud and laterite nickel ore, and provides a new method for iron recovery in red mud and production of iron-nickel alloy by red mud and laterite nickel ore at the same time, the method directly Using iron and nickel reduction products in red mud and laterite nickel ore can provide low-cost iron and nickel alloys for stainless steel smelting production, ferroalloy castings and alloy steel production. Because the laterite-nickel ore also contains a small amount of chromium, in the method production of the present invention, chromium also enters in the iron-nickel alloy, thereby enriching the beneficial chemical composition of the iron-nickel alloy. The iron-nickel alloy produced by the method of the present invention is an 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 iron-nickel alloys by utilizing red mud and laterite nickel ore. Background technique [0002] Red mud is the residue formed after alumina is extracted from bauxite. The slag 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. At present, 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 utilized, and most of it is still sent to the yard for open storage, which not only occup...

Claims

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Application Information

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Patent Type & Authority Patents(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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