Comprehensive utilization method of ferriferous fayalite material

A technology of olivine and materials, applied in the direction of improving process efficiency, etc., can solve the problems of unrecoverable iron, poor technical economy, and difficult separation of ferrosilicon, so as to reduce consumption, high comprehensive utilization rate of resources, and strong applicability Effect

Active Publication Date: 2013-10-09
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Abstract
  • Description
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Problems solved by technology

However, about 90% of the iron in copper slag is fayalite (Fe 2 SiO 4 ), the particle size of the embedding cloth is extremely fine, and it is difficult to separate ferrosilicon, which leads to the failure of reasonable recovery of iron
Although there are studies to reduce the fayalite in the copper slag to pig iron for recycling in the molten state, the reduction temperature of fayalite is high and the reaction is endothermic, resulting in high energy consumption for smelting and poor technical economy

Method used

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  • Comprehensive utilization method of ferriferous fayalite material

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Effect test

Embodiment 1

[0032] Such as figure 1 Shown, a kind of processing method of iron-containing olivine material comprises the following steps:

[0033] Contains Fe35.32%, SiO 2 32.56% iron-containing olivine iron ore was mixed with 50g / L NaOH solution and additives at 90°C for 5 hours, the liquid-solid ratio was 30, and the amount of additives was 0.5% of the silicon content in the iron ore. SiO was obtained by centrifugation 2 9.35g / L silicon-containing alkali solution, and Fe61.94%, SiO 2 4.57% desiliconized concentrate. The leachate circulation is used in the leaching process, and when the molecular ratio of silicon dioxide to sodium oxide in the solution is greater than 0.7, it is used for the production of sodium silicate.

Embodiment 2

[0035] Such as figure 1 Shown, a kind of processing method of iron-containing olivine material comprises the following steps:

[0036] The composition is Fe38.32%, SiO 2 30.83% of a copper slag was mixed with 500g / L KOH solution for 10 minutes at 280°C, the liquid-solid ratio was 5, and the amount of additive was 1% of the silicon content in the copper slag. Filter to get SiO 2 48.98g / L leachate, and Fe60.81%, SiO 2 8.07% desiliconized concentrate. The leachate circulation is used in the leaching process, and when the molecular ratio of silicon dioxide to potassium oxide in the solution is greater than 0.8, it is used for the production of potassium silicate.

Embodiment 3

[0038] Such as figure 1 Shown, a kind of processing method of iron-containing olivine material comprises the following steps:

[0039] Fe42.41%, SiO 2 27.56% ferronickel slag was mixed and reacted with 100g / L NaOH and KOH solution at 150°C for 2 hours, and the liquid-solid ratio was 10. SiO was obtained by centrifugation 2 24.74g / L silicon-containing lye, and Fe65.05%, SiO 2 3.92% desiliconized concentrate. The leachate circulation is used in the leaching process and is used for the production of sodium potassium silicate when the molecular ratio of silicon dioxide to sodium oxide and potassium oxide in the solution is greater than 0.7.

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Abstract

The invention discloses a comprehensive utilization method of a ferriferous fayalite material, relates to a processing method of the ferriferous fayalite material, and in particular relates to a method for separating and utilizing iron and silicon in fayalite. The method is characterized by comprising the following steps of: grinding the ferriferous fayalite material; mixing with alkaline liquor for leaching reaction; performing solid-liquid separation on obtained reaction slurry to obtain desilicated concentrate and silicon containing alkaline liquor; and oxidizing the desilicated concentrate in air to goethite. The method disclosed by the invention enriches, separates and extracts iron and silicon elements to form two products: goethite and silicon containing alkaline liquor through alkaline liquor leaching, wherein iron and silicon in ferriferous fayalite exist in solid and liquid states, so that the comprehensive utilization ratio of resources is high and the economic benefit is better.

Description

technical field [0001] A method for comprehensive utilization of iron-containing olivine materials relates to a treatment method for iron-containing olivine materials, in particular to a method for separating and utilizing iron and silicon in the iron-containing olivine. Background technique [0002] There are about 26 billion tons of iron ore resources available for development and utilization in my country, but rich iron ore resources are insufficient. 96% of the iron ore resources are lean ore, and the average iron grade is 32.6%. Since 2003, my country's dependence on imported iron ore has reached more than 55%. It is imminent to find new sources of raw materials. [0003] Fayalite and other iron minerals in the form of iron silicate have been discarded as unusable iron for industry due to their low iron content and high silicon content. At present, many metallurgical slags contain a certain amount of iron, but due to technical and economic reasons, large-scale utiliza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12
CPCY02P10/20
Inventor 刘万超陈湘清闫琨和新忠
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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