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Technological method for improving TiO2 grade of synthetic rutile by reduction rust method

A technology of artificial rutile and process method, applied in chemical instruments and methods, titanium oxide/hydroxide, inorganic chemistry, etc., can solve problems such as insufficiency, achieve low cost, improve TiO2 grade, and reduce production costs.

Inactive Publication Date: 2018-06-29
MAOMING UBRIDGE GROUP MINERAL IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Limited by the process conditions, the original reduction corrosion method artificial rutile TiO 2 The grade is generally below 92%, which cannot meet the needs of high-grade artificial rutile in some fields

Method used

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  • Technological method for improving TiO2 grade of synthetic rutile by reduction rust method
  • Technological method for improving TiO2 grade of synthetic rutile by reduction rust method
  • Technological method for improving TiO2 grade of synthetic rutile by reduction rust method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment selects seashore placer titanium concentrate 1#, its main component TiO 2 is 56.00%.

[0026] Step 1: Pass it through 800GS, 8000GS cascade magnetic separation and 20,000-volt high-voltage electric separation to discharge magnetite, low-grade titanium concentrate, non-magnetic ore, weak magnetic titanium ore and garnet in titanium concentrate and Titanium concentrate is magnetically close to the impurity ore to obtain high-grade, high-purity titanium concentrate raw materials.

[0027] Step 2: put the above-mentioned titanium concentrate into the rotary kiln for high temperature and negative pressure sealed reduction, control the reduction temperature at 1180°C, and the metallization rate of iron oxide is 90%.

[0028] Step 3: Pass the high-temperature material from the reduction kiln through the heat exchanger to generate high-temperature steam into the corrosion tank, keep the corrosion reaction temperature at 80°C, and control the metal iron content ...

Embodiment 2

[0036] This embodiment selects seashore placer titanium concentrate 2#, its main component TiO 2 is 58.00%.

[0037] Step 1: Pass it through 900GS, 8000GS cascade magnetic separation and 25,000-volt high-voltage electric separation to discharge magnetite, low-grade titanium concentrate, non-magnetic ore, weak magnetic titanium ore and garnet in titanium concentrate and Titanium concentrate is magnetically close to the impurity ore to obtain high-grade, high-purity titanium concentrate raw materials.

[0038] Step 2: Put the above-mentioned titanium concentrate into the rotary kiln for high-temperature negative pressure sealed reduction, control the reduction temperature at 1200°C, and the metallization rate of iron oxide is 92%.

[0039] Step 3: Pass the high-temperature material from the reduction kiln through the heat exchanger to generate high-temperature steam into the corrosion tank, keep the corrosion reaction temperature at 85°C, and control the metal iron content to 0...

Embodiment 3

[0047] This embodiment selects seashore placer titanium concentrate 3#, its main component TiO 2 is 60.00%.

[0048] Step 1: Pass it through 1000GS, 9000GS cascade magnetic separation and 30,000 volt high-voltage electric separation to discharge magnetite, low-grade titanium concentrate, non-magnetic ore, weak magnetic titanium ore and garnet in titanium concentrate and Titanium concentrate is magnetically close to the impurity ore to obtain high-grade, high-purity titanium concentrate raw materials.

[0049] Step 2: put the above-mentioned titanium concentrate into the rotary kiln for high-temperature negative pressure sealed reduction, control the reduction temperature at 1250°C, and the metallization rate of iron oxide is 93%.

[0050]Step 3: Pass the high-temperature material from the reduction kiln through the heat exchanger to generate high-temperature steam into the corrosion tank, keep the corrosion reaction temperature at 90°C, and control the metal iron content to 0...

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Abstract

The invention discloses a technological method for improving TiO2 grade of synthetic rutile by a reduction rust method. The method comprises the following steps: 1, selecting high-grade seashore altered titanium concentrate with TiO2 not less than 56%, performing stepped magnetic separation and high tension separation for the titanium concentrate; 2, putting the titanium concentrate obtained in the step 1 into a rotary kiln to be subjected to high-temperature negative-pressure sealing reduction; 3, using a high-temperature material from a reduction kiln to be introduced into a rust tank through high-temperature steam produced by a heat exchanger, and controlling the content of metallic iron below 0.3%; 4, carrying out combined washing on a rusted titanium-rich material by using a horizontal spiral classifier, a vertical spiral chute and a vacuum belt filter press; 5, firstly, carrying out acid leaching on a washed titanium-rich material with dilute hydrochloric acid of which the concentration is 10 to 15%; then adding diluted hydrofluoric acid of which the concentration is 2 to 5% to perform acid leaching for 0.5 to 1 h; and 6, drying the titanium-rich material obtained in the step 5, and then improving the TiO2 grade through dry magnetic separation. The method does not require pelletizing, crushing and ore grinding, and further does not need to perform pre-oxidation treatment, and is simple in treatment process of raw materials before reduction and low in cost.

Description

technical field [0001] The invention belongs to the field of chemical metallurgy, and in particular relates to a process method for manufacturing high-grade artificial rutile by reducing corrosion method, and the produced product is suitable for producing raw materials of titanium dioxide, titanium tetrachloride and welding materials by chlorination method. Background technique [0002] Artificial rutile is made of titanium concentrate, and the iron oxide in it is removed by metallurgical or chemical methods, so as to improve its TiO 2 grade. To sum up, there are no more than three production methods: one is to remove iron oxide by acid leaching after direct or pretreatment (such as pre-oxidation, pre-reduction, etc.) of titanium concentrate; Iron oxide is separated into metallic iron, and titanium dioxide forms high-titanium slag; the other is to first reduce iron oxide in titanium concentrate, and then use electrochemical corrosion method to rust and separate metallic iro...

Claims

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Application Information

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IPC IPC(8): C01G23/047
CPCC01G23/0475C01P2002/30C01P2006/80
Inventor 夏国春刘永雄孙红宇谭健锋
Owner MAOMING UBRIDGE GROUP MINERAL IND
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