Method for comprehensively utilizing red mud and high-phosphorus iron ore

A high-phosphorus iron ore and red mud technology, which is applied in the field of red mud and high-phosphorus iron ore solid-state dephosphorization and iron extraction technology, can solve the problems of environmental pollution, red mud cannot be used, etc., to reduce the phosphorus content and facilitate industrialization The effect of low promotion and production cost

Inactive Publication Date: 2013-02-20
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] At the same time, the present invention solves the problem of environmental pollution caused by unusable red mud and the problem of phosphorus reduction of high-phosphorus iron ore. The present invention achieves the purpose of "treating waste with waste" through red mud + high-phosphorus iron ore solid-state reduction conversion technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for comprehensive utilization of red mud and high phosphorus iron ore of the present invention comprises the following preparation steps:

[0033] a. Mix 1kg high-phosphorus iron ore, 10g red mud and 10g coal powder evenly, wherein the main components of red mud are: SiO2 is 12wt%, CaO is 3.5wt%, Fe 2 o 3 38wt%, Al 2 o 3 18wt%, Na 2 O is 9 wt %, TiO 2 1.5wt%; high phosphorus iron ore main components: TFe is 50wt%, Al 2 o 3 is 5wt%, P is 1.28wt%;

[0034] b. Heat the mixed material described in step a to 100°C and keep it warm for 10 minutes;

[0035] c, after the step b reaction finishes, drop to room temperature, filter the liquid after soaking in water for 10min, and reclaim it for the preparation of phosphate fertilizer;

[0036] d, the solid filtered out in step c is subjected to magnetic separation to obtain hematite; the obtained non-magnetic part is a mixture of aluminum, silicon, titanium and other valuable metal salts in high phosphorus iron or...

Embodiment 2

[0039] A method for comprehensive utilization of red mud and high phosphorus iron ore of the present invention comprises the following preparation steps:

[0040] a. Mix 1kg of high-phosphorus iron ore, 500g of red mud and 100g of coal powder evenly, wherein the main components of red mud are: SiO2 is 12wt%, CaO is 3.5wt%, Fe 2 o 3 38wt%, Al 2 o 3 18wt%, Na 2 O is 9 wt %, TiO 2 1.5wt%; high phosphorus iron ore main components: TFe is 50wt%, Al 2 o 3 is 5wt%, P is 1.28wt%;

[0041]b. Heat the mixed material described in step a to 500°C and keep it warm for 300min;

[0042] c, after the completion of the reaction in step b, cool down to room temperature, soak in circulating water for 60min and filter out the liquid;

[0043] d. The solid filtered out in step c is separated by magnetic separation to obtain magnetite; aluminum, titanium, rare scattered metals and rare rare earth metals in the high phosphorus iron ore and red mud enter the non-magnetic part for recycling. ...

Embodiment 3

[0046] A method for comprehensive utilization of red mud and high phosphorus iron ore of the present invention comprises the following preparation steps:

[0047] a. Mix 500g of high-phosphorus iron ore, 500g of red mud and 500g of coal powder evenly, wherein the main components of red mud are: SiO2 is 12wt%, CaO is 3.5wt%, Fe 2 o 3 38wt%, Al 2 o 3 18wt%, Na 2 O is 9 wt %, TiO 2 1.5wt%; high phosphorus iron ore main components: TFe is 50wt%, Al 2 o 3 is 5wt%, P is 1.28wt%;

[0048] b. Heat the mixed material described in step a to 900°C and keep it warm for 120min;

[0049] c, after the completion of the reaction in step b, drop to room temperature, soak in water for 120min and filter out the liquid;

[0050] d. The solid filtered out in step c is separated by magnetic separation to obtain iron concentrate; the aluminum and titanium in the high phosphorus iron ore and red mud enter the non-magnetic part for recycling.

[0051] After analysis and testing, the obtained ...

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Abstract

The invention relates to a method for comprehensively utilizing red mud and high-phosphorus iron ore, and specifically relates to a red mud and high-phosphorus iron ore solid dephosphorization and iron extraction technology. The method comprises the following preparation steps of: a, evenly mixing powdered high-phosphorus iron ore, powdered red mud and pulverized coal according to the proportion of 100: (1-100): (1-100), b, heating the mixed material obtained in the step a in a temperature range of 100-900 DEG C and preserving the temperature for 10-300min, c, after the material obtained in the step b is cooled, soaking the material by water for 10-120min and then filtering the liquid, and d, carrying out magnetic separation on the solid filtered in the step c, wherein the magnetic part is hematite or magnet or iron ore concentrate and the phosphorus content is less than 0.3wt%. According to the method, the red mud can be effectively utilized to reduce the pollution to the environment, and at the same time, the phosphorus content of the high-phosphorus iron ore can be decreased for recycling. The method is simple in process, low in production cost and beneficial to industrial popularization.

Description

[0001] technical field [0002] The invention belongs to the field of energy and metallurgical metals, and in particular relates to a comprehensive utilization method of red mud and high-phosphorus iron in aluminum metallurgy, specifically a technology for solid-state dephosphorization and iron extraction of red mud and high-phosphorus iron ore. [0003] Background technique [0004] Red mud is the solid residue obtained after extracting alumina from bauxite with alkali. It is one of the main factors that cause environmental pollution during the production of alumina. The main components of red mud are SiO 2 , CaO, Fe 2 o 3 、Al 2 o 3 、Na 2 O, TiO 2 And certain rare earth elements and trace radioactive elements. Generally, about 1.0-1.7 tons of red mud are produced for every ton of alumina produced. According to incomplete estimates, the world discharges about 60 million tons of red mud every year. my country is the world's fourth largest producer of alumina, and its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/11C22B1/00
Inventor 马瑞新李士娜肖玉琴黄凯李东冉贺良伟
Owner UNIV OF SCI & TECH BEIJING
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