Method for preparing ferronickel byproduct active smelting electric furnace grain slag through red mud and nickel laterite ore

A technology for laterite nickel ore and iron-nickel alloy, which is applied in the direction of improving process efficiency, can solve problems such as a large amount of ferronickel smelting slag storage, etc., so as to improve the ferronickel smelting process, change chemical composition and mineral composition, and improve hydration. active effect

Active Publication Date: 2016-11-23
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned utilization methods have not effectively solved the resource utilization problem of ferronickel smelting slag, resulting in the current situation of a large amount of stockpiling of ferronickel smelting slag

Method used

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  • Method for preparing ferronickel byproduct active smelting electric furnace grain slag through red mud and nickel laterite ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present invention utilizes red mud and laterite nickel ore to prepare the method for by-product active submerged arc furnace granulated slag, wherein, the method comprises the following steps:

[0027] 1) The selected raw materials are red mud, laterite nickel ore and coke powder. The main chemical composition and mass percentage of red mud are: Fe 2 O 3 32.96%, Al 2 O 3 17.25%, CaO 14.73%, SiO 2 12.81%, Na 2 O 4.06%; the main chemical composition and mass percentage of laterite nickel ore are: Fe 16.62%, Ni 1.70%, MgO 17.18%, CaO 0.31%, SiO 2 40.12%, Cr 2 O 3 0.86%; coke powder contains fixed carbon 65.02%, SiO 2 13.88%, CaO 2.96%; CaO content in lime is greater than 95%, Na in sodium silicate 2 SiO 3 ≥96%.

[0028] 2) According to the mass ratio of red mud: laterite nickel ore: coke powder: lime: sodium silicate = 100: 60: 10: 8: 3.4, the ingredients are made into dry agglomerates.

[0029] 3) The dry agglomerate obtained by the above steps is se...

Embodiment 2

[0032] The present invention utilizes red mud and laterite nickel ore to prepare the method for by-product active submerged arc furnace granulated slag, wherein, the method comprises the following steps:

[0033]1) The selected raw materials are red mud, laterite nickel ore and coke powder; the main chemical components and mass ratio of red mud are: Fe 2 O 3 32.96%, Al 2 O 3 17.25%, CaO 14.73%, SiO 2 12.81%, Na 2 O 4.06%; the main chemical composition and mass ratio of laterite nickel ore are: Fe 16.62%, Ni 1.70%, MgO 17.18%, CaO 0.31%, SiO 2 40.12%, Cr 2 O 3 0.86%; coke powder contains fixed carbon 65.02%, SiO 2 13.88%, CaO 2.96%; sodium silicate contains Na 2 SiO 3 ≥96%.

[0034] 2) According to the mass ratio of red mud: laterite nickel ore: coke powder: sodium silicate = 20: 80: 10: 2.4, ingredients are made to make dry agglomerates.

[0035] 3) The dried agglomerates obtained by the above steps are sent to a 150kW submerged arc furnace for direct reductio...

Embodiment 3

[0038] The present invention utilizes red mud and laterite nickel ore to prepare the method for by-product active submerged arc furnace granulated slag, wherein, the method comprises the following steps:

[0039] 1) The selected raw materials are red mud, laterite nickel ore, limestone and coke powder; the main chemical composition and mass percentage of red mud are: Fe 2 O 3 32.96%, Al 2 O 3 17.25%, CaO 14.73%, SiO 2 12.81%, Na 2 O 4.06%; the main chemical composition and mass percentage of laterite nickel ore are: Fe 16.62%, Ni 1.70%, MgO 17.18%, CaO 0.31%, SiO 2 40.12%, Cr 2 O 3 0.86%; coke powder contains fixed carbon 65.02%, SiO 2 13.88%, CaO 2.96%; CaCO in limestone 3 Content greater than 97%, Na in sodium silicate 2 SiO 3 ≥96%.

[0040] 2) According to the mass ratio of red mud: laterite nickel ore: coke powder: limestone: sodium silicate = 10: 100: 5: 9: 1.8, ingredients are made to make dry agglomerates.

[0041] 3) The dried agglomerates obtained by...

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Abstract

The invention provides a method for preparing ferronickel byproduct active smelting electric furnace grain slag through red mud and nickel laterite ore. The method is characterized by comprising the following steps that 1, proportioning is carried out, specifically, raw materials include the red mud, the nickel laterite ore, coke powder and lime; and 2, reduction smelting of a smelting electric furnace is carried out, specifically, clusters formed through the raw materials prepared in the step 1 are conveyed into the smelting electric furnace for reduction smelting, slag and iron separation is completed through slag pre-making, melting and reduction, a furnace slag layer is formed, the furnace slag is discharged out of a slag opening regularly and subjected to water quenching or air-cooling pelletization, and the active smelting electric furnace grain slag is obtained. The smelting electric furnace grain slag prepared through the method can serve as a mixed material applied in the cement production process, the cement performance is improved, the variety and labels of cement products are adjusted, and the production cost is reduced; and meanwhile, the slag can be used for producing a concrete admixture independently or by being combined with other raw concrete admixture materials, and the resource utilization of the ferronickel byproduct active smelting electric furnace grain slag prepared through the red mud and the nickel laterite ore is effectively achieved.

Description

technical field [0001] The invention relates to the field of Portland cement and its concrete production technology and iron and steel metallurgy technology, in particular to a method for preparing iron-nickel alloy by-product active submerged arc furnace granulated slag by using red mud and laterite-nickel ore. Background technique [0002] Red mud is the residue formed after the bauxite is extracted from alumina. The residue is rich in chemical components such as ferric oxide, silicon dioxide, aluminum oxide, calcium oxide and sodium oxide. For every ton of alumina produced, approximately 0.8-2.0 tons of red mud is 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. 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 storage yard for storage in the open air. Cause soil alkalization, swampy, pollute surface an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B4/06
CPCY02P10/20
Inventor 曹德光曾建民
Owner GUANGXI UNIV
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