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Method and device for producing titanium dioxide slag from ilmenite

A technology of titanium dioxide and ilmenite, which is applied in the field of producing titanium dioxide slag and devices from ilmenite, can solve the problems of first granulation of ilmenite, and achieve the effects of increasing the magnetic susceptibility and reliable separation

Inactive Publication Date: 2007-10-10
OUTOTEC OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another disadvantage of the aforementioned method is that the applied ilmenite must first be granulated before reduction

Method used

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  • Method and device for producing titanium dioxide slag from ilmenite
  • Method and device for producing titanium dioxide slag from ilmenite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] In the device corresponding to Fig. 2, the raw material ilmenite (12kg / h) having a particle size of the following composition less than 1mm is added to the suspension heat exchanger 5 through the solid supply pipeline 1:

[0036] TiO 2 50.04wt%

[0037] Fe 2 o 3 13.44wt%

[0038] FeO 32.79wt%

[0039] MnO 0.58wt%

[0040] SiO 2 0.62wt%

[0041] Al 2 o 3 0.53wt%

[0042] MgO 0.68wt%

[0043] CaO 0.05wt%

[0044] S 0wt%

[0045] C 0wt%

[0046] Other 0.37wt%

[0047] Loss on ignition (LOI) 0.90wt%

[0048] Total 100.00wt%

[0049] Ti 合计 30wt%

[0050] Fe 合计 34.90wt%

[0051] After passing through the first and second preheating sections, the preheated ore is fed into the oxidation reactor 23 through the pipeline 7', thereby almost completely oxidizing FeO to form Fe 2 o 3 . In addition, fuel and ...

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Abstract

In the process for the production of titania slag from ilmenite, granular ilmenite is first partially reduced with a reducing agent in a reduction reactor, and then the hot mass with an inlet temperature of at least 550° C. is conveyed into an electric furnace and therein Melted in the presence of a reducing agent to form liquid pig iron and titania slag. The reduction reactor consists of a circulating fluidized bed reactor.

Description

technical field [0001] The invention relates to a method for producing titania slag from ilmenite and a corresponding device. Background technique [0002] Ilmenite is one of the most important raw materials for the recovery of metallic titanium and titanium compounds such as titanium dioxide for the production of pigments in addition to rutile, which contains a large amount of iron oxide (x TiO 2 +y·FeO+z·Fe 2 o 3 ). Separation of iron from ore is usually carried out by electromelting ilmenite in a metallurgy furnace, where iron oxides are reduced to metallic iron which is precipitated from a titania-containing slag. But the disadvantage of this method is that it requires a lot of electrical energy, about 2,200 kWh per ton of titania slag, which constitutes a major part of the production costs. [0003] From U.S. 3,765,868 is known a process for the production of titania slag from ilmenite, in which the raw ore is first partially reduced in a rotary kiln and subsequentl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C22B5/14
CPCC22B4/08C22B5/10C22B5/14C22B5/18C22B34/1209
Inventor P·乔金南A-N·贝扎维L·弗曼尼克
Owner OUTOTEC OYJ