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-containi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1 is 100 parts by weight of TiO 2 Titanium-containing molten slag with a content of 30% is used as a raw material to produce titanium-rich material, and the particle size of the molten slag is 50-300 mesh, of which the particle size is less than 120 mesh and not less than 80%. The preparation process is as follows: (1) adding Na with a slag content of 30% to the titanium-containing molten slag 2 CO 3 After mixing for 0.5 hours; put the mixture into the roasting furnace for 2 hours at 900°C, and the roasted material is ball-milled to 50 mesh; (2) the roasted material after ball milling is added with a concentration of 1% according to the solid-liquid volume ratio of 1:5. The 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, and then sent to a calciner, and calcined at 300 °C ...

Example Embodiment

[0017] Embodiment 2 is 100 parts by weight of TiO 2 Titanium-containing molten slag with a content of 40% is used as the raw material to produce titanium-rich material, and the particle size of the molten slag is 50-300 mesh, of which the particle size is less than 120 mesh and not less than 80%. The preparation process is as follows: (1) adding Na with a slag content of 50% to the titanium-containing molten slag 2 HCO 3 After mixing for 1 hour; put the mixture into the roasting furnace and roast at 1000°C for 5 hours, and the roasted material is ball-milled to 100 mesh; (2) add the 5% HCl solution to the ball-milled roasted material at a solid-liquid volume ratio of 1:8 Leaching for 5 hours, the leaching temperature is 70 °C; (3) The solid-liquid mixture obtained in (2) is filtered, and the filtrate is concentrated and returned to be recycled; the filter residue is washed and dried and sent to a calciner, calcined at 380 °C for 4.5 hours, TiO 2 Finished titanium-rich mater...

Example Embodiment

[0018] Embodiment 3 is 100 parts by weight of TiO 2 Titanium-containing molten slag with a content of 50% is used as a raw material to produce titanium-rich material, and the particle size of the molten slag is 50-300 mesh, of which the particle size is less than 120 mesh and not less than 80%. The preparation process is as follows: (1) adding NaOH with a slag content of 10% to the titanium-containing molten slag and mixing for 1 hour; placing the mixture in a roasting furnace for 10 hours at 1100° C., and the roasted product is ball-milled to 300 mesh; (2) ) Add HCl solution with a concentration of 10% to the calcined material after ball milling at a solid-liquid volume ratio of 1:10 and leaching for 10 hours at a leaching temperature of 100°C; (3) Filter the solid-liquid mixture obtained in (2), and the filtrate is concentrated after Returned for recycling; the filter residue was washed and dried and then sent to the calciner, and calcined at 450 ° C for 3 hours to obtain Ti...

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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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