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Method for preparing titanium-rich material from titanium-containing slag

A technology of titanium-rich material and slag, which is applied in the direction of improving process efficiency, can solve the problem of not being retrieved, and achieve the effects of less waste gas, convenient operation and significant economic benefits.

Inactive Publication Date: 2010-07-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the newly developed ironmaking technology of the direct ironmaking method, before the inventor of the present invention completed the present invention, no titanium-containing fused slag produced from the direct ironmaking method of vanadium-titanium magnetite was retrieved from the published literature Report on Production of Titanium-rich Materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 is the TiO of 100 parts by weight 2 Titanium-containing fused slag with a content of 30% is used as a raw material to produce titanium-rich material, and the particle size of the fused slag is 50-300 mesh, and no less than 80% of the particle size is less than 120 mesh. The preparation process is as follows: (1) Add 30% Na in the slag containing titanium 2 CO 3 After mixing for 0.5 hours; put the mixture into the roaster at 900°C for 2 hours, and ball-mill the roasted material to 50 mesh; HCl solution was leached for 2 hours, and the leaching temperature was 50°C; (3) The solid-liquid mixture obtained in (2) was filtered, and the filtrate was concentrated and returned for recycling; the filter residue was washed and dried, then sent to the calciner, and calcined at 300°C for 3 hours, TiO 2 Finished titanium-rich material with a grade greater than 90%.

Embodiment 2

[0017] Embodiment 2 is the TiO of 100 parts by weight 2 Titanium-containing slag with a content of 40% is used as a raw material to produce titanium-rich materials, and the particle size of the slag is 50-300 mesh, and no less than 80% of the particle size is less than 120 mesh. The preparation process is as follows: (1) Add 50% Na in the slag containing titanium 2 HCO 3 After mixing for 1 hour; put the mixture in a roaster at 1000°C and roast for 5 hours, and ball mill the roasted material to 100 mesh; (2) add 5% HCl solution to the roasted material after ball milling at a solid-to-liquid volume ratio of 1:8 Leaching for 5 hours, the leaching temperature is 70°C; (3) Filter the solid-liquid mixture obtained in (2), and return the filtrate for recycling after being concentrated; the filter residue is washed and dried, then sent to the calciner, and calcined at 380°C for 4.5 hours, TiO 2 Finished titanium-rich material with a grade greater than 90%.

Embodiment 3

[0018] Embodiment 3 is the TiO of 100 parts by weight 2 Titanium-containing fused slag with a content of 50% is used as a raw material to produce titanium-rich material, and the particle size of the fused slag is 50-300 mesh, and no less than 80% of the particle size is less than 120 mesh. The preparation process is as follows: (1) Add NaOH with a slag content of 10% to the titanium-containing molten slag and mix for 1 hour; put the mixture in a roasting furnace for 10 hours at 1100°C, and ball mill the roasted product to 300 mesh; (2 ) Add the HCl solution with a concentration of 10% to leaching the roasted material after ball milling according to the solid-liquid volume ratio of 1:10 for 10 hours, and the leaching temperature is 100°C; (3) Filter the solid-liquid mixture obtained in (2), and the filtrate is concentrated Return to recycling; the filter residue is sent to the calciner after washing and drying, and is calcined at 450°C for 3 hours to obtain TiO 2 Finished tita...

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Abstract

The invention relates to a method for preparing titanium-rich material from titanium-containing slag, comprising the following steps: 1. carrying out ball-milling on titanium-containing slag, then adding Na2CO3 or NaOH and mixing evenly; 2. carrying out calcination on the mixture obtained in step 1, then adding HC1 solution for leaching; 3. filtering the leached solution, concentrating and then recycling the filtrate; 4. calcining the filter residue to obtain titanium-rich material with grade of TiO2 being more than 90%.In the invention, Na2CO3, NaHCO3 or NaOH are added into the titanium-containing slag, then SiO2, Al203 in the slag are converted into NaSiO3 and NaAlO2 which are later leached by HC1 solution, so that SiO2, Al2O3 and MgO which are not converted are leached into the solution and grade of TiO2 in leached slag is improved by a big margin. The technique of the invention features simple method, convenient operation, environmental-friendliness, good economic benefits, high level of resource utilization and adaptability to industrialized production; in addition, the technique is especially suitable for recovering titanium in titanium-containing slag produced by the direct iron process.

Description

technical field [0001] The invention discloses a method for preparing titanium-rich material from titanium-containing slag, in particular to a process for producing titanium-rich material by using titanium-containing molten slag produced by a direct ironmaking method as a raw material; it belongs to the recovery of titanium resources Take advantage of technical areas. Background technique [0002] Titanium is an important strategic resource, widely used in aviation, aerospace, electronics, electric power, chemical industry, environmental protection and daily life and other fields. Titanium resources are very rich and widely distributed, and TiO has been found 2 There are more than 140 kinds of titanium minerals with a content greater than 1%, but there are only a few minerals with utilization value, mainly rutile and ilmenite, followed by white titanium, anatase and red ilmenite, and other minerals containing Titanium minerals need to be first prepared into titanium-rich m...

Claims

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Application Information

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IPC IPC(8): C22B34/12C22B7/04
CPCY02P10/20
Inventor 袁铁锤刘洪贵
Owner CENT SOUTH UNIV
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