Ecological treating method for blast furnace slag containing titanium

A technology for ecological treatment and blast furnace slag, applied in chemical instruments and methods, wind shaker, solid separation, etc., can solve the problems of low TiO2 extraction rate, complex process, long process, etc., and achieve good social and economic benefits, process The effect of simple method and short process

Inactive Publication Date: 2006-05-24
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of these technologies are complex process, long process, high cost, TiO 2 The extraction rate is low and difficult, and these methods are not effective in extracting TiO 2 In the process, new waste and pollution are caused, so there is still no ecological utilization practice for titanium-containing blast furnace slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: Using Panzhihua Iron and Steel Slag, in which TiO 2 23.16wt%, containing about 1.85wt% Fe, containing SiO 2 24.01wt%, MgO 7.47wt%, Al 2 o 3 13.49wt%, CaO 27.19wt%, V 2 o 5 0.23 wt% is raw material. After the following process:

[0018] 1) Crushing: choose a pulverizer to crush the blast furnace slag to 1-5mm;

[0019] 2) Magnetic separation: use a magnet to remove metallic iron in the slag;

[0020] 3) Grinding: Grinding with a ball mill for about 8 hours, the average particle size is below 2 μm;

[0021] 4) Doping mixture: add 0.5wt% ZnO micropowder, grind it with a ball mill until the average particle size is less than 2 μm, and mix it with titanium-containing blast furnace slag fine powder;

[0022] 5) Roasting activation: the above-mentioned mixture is heated to 800°C in a strong magnetic field of 4.0 Tesla, and then activated for 1 hour at a heat preservation condition, and then naturally cooled to room temperature;

[0023] 6) Re-grinding: G...

example 2

[0026] Example 2: Adopt Panzhihua Iron and Steel Slag, and the ingredients are the same as in Example 1.

[0027] In the treatment method, the magnetic field strength is 1.0 Tesla, no oxide or metal salt is doped after grinding, and other process steps are the same as in Example 1.

[0028] According to the test method of Example 1, the degradation rate of the dye methylene blue can reach 49~55% after 2 hours.

example 3

[0029] Example 3: Using blast furnace slag from Chengde Iron and Steel Company as raw material, the slag contains TiO after testing 2 16.03wt%, containing Fe about 0.40wt%, MgO 14.89wt%, Al 2 o 3 24.94wt%, CaO 32.12wt%. No doping is done after grinding, and other process steps are the same as in Example 1. According to the test method of Example 1, the degradation rate of the dye methylene blue can reach 45% to 53% after 2 hours.

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Abstract

The invention relates to biology process method for titanium contained blast furnace slag that the TiO2 is over 16.03% titanium contained as raw material. After crashing, magnetic separation, pulverizing, and baking for 1 hour under the condition of 800 degree centigrade and strong magnetic field of 0.8-4.0, tesla cooling naturally, the ZnO, CeO2, or AgCl could be mixed in it. The invention has simple process, low cost and could be used in kinds of fields.

Description

technical field [0001] The invention relates to a treatment method for slag produced by blast furnace smelting pig iron, in particular to an ecological treatment method for titanium-containing blast furnace slag produced by blast furnace smelting ilmenite. Background technique [0002] At present, there are a large number of research reports on the treatment and application of titanium-containing blast furnace slag at home and abroad. [0003] The ilmenite ores used in foreign blast furnace smelting generally contain TiO due to their low titanium content. 2 Not more than 3 to 4%, the TiO contained in its blast furnace slag 2 Generally, it is lower than 10%. Therefore, foreign titanium-containing blast furnace slag is similar to ordinary blast furnace slag, and does not require special processing in utilization, and is completely utilized as ordinary slag. [0004] my country has relatively large reserves of vanadium-titanium magnetite, which has been proven to be 6.19 bill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06B03B4/00B03C1/02
CPCY02W30/50
Inventor 薛向欣杨合姜涛段培宁张志宏赵娜董学文刘卯
Owner NORTHEASTERN UNIV
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