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Slag-free combined production process for iron, aluminum and titanium

A production process and combined method technology, applied in the field of metal smelting, can solve the problems of large power consumption, high operating cost, large amount of waste gas, etc., and achieve the effects of thorough reaction, low operating cost and fast speed.

Inactive Publication Date: 2012-11-07
胡长春 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method consumes a large amount of electric energy and produces a large amount of waste gas, the operating cost is quite high and the pollution is very large.

Method used

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  • Slag-free combined production process for iron, aluminum and titanium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 Shown, a kind of iron, aluminum, titanium combined method slag-free production process, comprises the steps:

[0028] a) take ilmenite and bauxite according to the weight ratio of 0.5:0.5 and mix them; respectively take coal, alkali and fluorite ore according to 20%, 5% and 1% of the total weight of the mixture of ilmenite and bauxite; They are ground and mixed evenly to make mixed raw meal;

[0029] b) Add the above mixed raw meal into the rotary kiln 1, the temperature from the tail to the head in the rotary kiln 1 gradually rises from 800 degrees Celsius to 1460 degrees Celsius; the mixed raw meal is dried and pre-reduced in the rotary kiln 1, The time is 2 hours; generate the reducing material in semi-molten state;

[0030] c) The above-mentioned reducing materials are passed through the closed channel 4 from the rotary kiln 1, and then enter the melting furnace 2. Three gas guns 23 are installed at the head of the melting furnace 2, and more than on...

Embodiment 2

[0034] like figure 1 Shown, a kind of iron, aluminum, titanium combined method slag-free production process, comprises the steps:

[0035] a) get ilmenite and bauxite mixed according to the weight ratio of 1:1; get coal, alkali and fluorite according to 50%, 10%, and 4% of the total weight of ilmenite and bauxite mixture respectively; They are ground and mixed evenly to make mixed raw meal;

[0036] b) Add the above mixed raw meal into the rotary kiln 1, the temperature from the tail to the head in the rotary kiln 1 gradually rises from 800 degrees Celsius to 1460 degrees Celsius; the mixed raw meal is dried and pre-reduced in the rotary kiln 1, The time is 10 hours; Generate the reducing material that is semi-molten state;

[0037] c) The above-mentioned reducing materials are passed through the closed channel 4 from the rotary kiln 1, and then enter the melting furnace 2. Three gas guns 23 are installed at the head of the melting furnace 2, and more than one gas gun 23 is in...

Embodiment 3

[0041] like figure 1 Shown, a kind of iron, aluminum, titanium combined method slag-free production process, comprises the steps:

[0042] a) According to the weight ratio of 0.7:0.8, ilmenite and bauxite are mixed; according to 30%, 7%, and 2% of the total weight of the ilmenite and bauxite mixture, coal, alkali and fluorite are respectively taken; They are ground and mixed evenly to make mixed raw meal;

[0043] b) Add the above mixed raw meal into the rotary kiln 1, the temperature from the tail to the head in the rotary kiln 1 gradually rises from 800 degrees Celsius to 1460 degrees Celsius; the mixed raw meal is dried and pre-reduced in the rotary kiln 1, Time is 5 hours; Generation is the reducing material of semi-molten state;

[0044] c) The above-mentioned reducing materials are passed through the closed channel 4 from the rotary kiln 1, and then enter the melting furnace 2. Three gas guns 23 are installed at the head of the melting furnace 2, and more than one gas ...

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Abstract

The invention discloses a slag-free combined production process for iron, aluminum and titanium, which comprises the following steps: a) preparing a mixed raw material by ilmenite, bauxite, coal, alkali, fluorite and lime according to a ratio; b) feeding the mixed raw material into a rotary kiln, drying and pre-reducing to generate a reduced material; c) feeding the reduced raw material into a melting and separating furnace, melting and separating iron from the slag; and d) carrying out water quenching on the discharged high-aluminum titanium clinkers, grinding and acid-leaching to obtain solid light metal oxides of silicon, calcium, magnesium, aluminum and titanium. The production process has the following advantages that alkali and fluorite play a role in catalyzing and fluxing, so that the separation of titanium and iron is fast and thorough; alkali and fluorine are evaporated, recovered and reused under the coal gas effect; furthermore, the production cost is reduced, titanium oxide, iron and aluminum and the like in the ilmenite can be separated and extracted, and no red mud is generated to pollute the environment; and the yields of titanium, iron and aluminum are 99% or more. A new process for a combined production of ilmenite and bauxite is implemented; the energy can be utilized in a stepped way; and the operation cost of the process is low, the economic benefit is high, and the green and environmental protection effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a slag-free production process of an iron, aluminum and titanium combined method. Background technique [0002] In the prior art, the processes for producing alumina by using bauxite mainly include the Bayer method, sintering method, combined method, and series method. The Bayer method mainly wet-mills bauxite and sodium hydroxide, and dissolves alumina at low temperature. The defect is that the yield of alumina is low (about 75%); the sintering method is to add sodium carbonate and limestone to bauxite ball milling and pulping with coal, etc., spraying and sintering in a rotary kiln to produce alumina clinker, and the yield of alumina can reach 80-85%. The combination or selective use of aluminum oxide can achieve a yield of 85-90%. The above-mentioned various methods only pursue the recovery rate of alumina, but do not pay attention to the comprehensive uti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/00F27D17/00
CPCY02P10/20Y02P10/25
Inventor 胡长春胡晓雪
Owner 胡长春
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