Method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag

A technology for separating iron and slag, applied in the field of metallurgy, can solve the problems of wasting energy, high cost, environmental pollution, etc., and achieve the effects of high efficiency, energy saving, low production cost, and strong operability

Active Publication Date: 2013-10-09
NORTHEASTERN UNIV
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  • Claims
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Problems solved by technology

[0029] (1) The methods in the above two patents can only realize the effective utilization of one type of slag, that is, titanium-containing blast furnace slag, with low chemical activity, low temperature, high processing cost, and the effect of migration, enrichment and growth of iron and titanium components Poor, low recovery rate, can only realize the recycling of iron and titanium groups, and does not realize the effective enrichment of valuable elements;
[0030] (2) The methods in the above two patents can only use one type of slag, that is, titanium-containing blast furnace slag. The temperature of single slag-titanium-containing blast furnace slag is low, and a large amount of heat needs to be compensated, which is costly and complicated to operate;
[0031] (3) SiO needs to

Method used

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  • Method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag
  • Method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag
  • Method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag

Examples

Experimental program
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Effect test

Embodiment 1

[0070] Fully mix 100kg of titanium-containing blast furnace slag and 3kg of vanadium-containing steel slag flowing out of the slag outlet to form a mixed slag;

[0071] The chemical composition of titanium-containing blast furnace slag is: 25.52wt%TiO 2, 20.69wt%CaO, 7.90wt%MgO, 11.95wt%Al 2 o 3 , 3.20wt% FeO and 17.80wt% SiO 2 , the balance is other impurities;

[0072] The chemical composition of vanadium-containing steel slag is: V 2 o 5 3.17wt%, TFe18.60wt%, 41.73wt%CaO, 11.65wt%SiO 2 , 5.37wt%TiO 2 , 2.60wt%MgO, 1.24wt%MnO, 1.22wt%Al 2 o 3 , the balance is other impurities;

[0073] Inject oxygen into the mixed melt for 25 minutes, the flow rate of oxygen is 1L / (min kg), after the gas injection is completed, the slag is naturally cooled;

[0074] From the cooled slag, manually remove the vanadium-containing metallic iron that settled to the bottom in the slag, crush the remaining slag to a particle size of 20-250 μm, grind the ore, and separate the remaining van...

Embodiment 2

[0078] Fully mix 100kg of titanium-containing blast furnace slag and 500kg of vanadium-containing steel slag flowing out of the slag outlet to form a mixed slag;

[0079] The chemical composition of titanium-containing blast furnace slag is: 23.01wt%TiO 2 , 20.68wt%CaO, 8.52wt%MgO, 12.58wt%Al 2 o 3 , 3.83wt%FeO, and 18.44wt%SiO 2 , the balance is other impurities;

[0080] The chemical composition of vanadium-containing steel slag is: V 2 o 5 2.12wt%, TFe19.55wt%, 40.83wt%CaO, 12.62wt%SiO 2 , 4.40wt%TiO 2 , 3.60wt%MgO, 1.20wt%MnO, 1.26wt%Al 2 o 3 , the balance is other impurities;

[0081] Inject air into the mixed melt for 2 minutes, the flow rate of air is 110L / (min kg), after the gas injection is completed, the slag is naturally cooled;

[0082] From the cooled slag, manually remove the vanadium-containing metallic iron that settled to the bottom in the slag, crush the remaining slag to a particle size of 20-250 μm, grind the ore, and separate the remaining vanadi...

Embodiment 3

[0084] Fully mix 300kg of titanium-containing blast furnace slag and 35kg of vanadium-containing steel slag flowing out of the slag outlet to form a mixed slag;

[0085] The chemical composition of titanium-containing blast furnace slag is: 22.30wt%TiO 2 , 19.89wt%CaO, 8.92wt%MgO, 12.98wt%Al 2 o 3 , 4.23wt%FeO, and 18.74wt%SiO 2 , the balance is other impurities;

[0086] The chemical composition of vanadium-containing steel slag is: V 2 o 5 1.13wt%, TFe17.64wt%, 43.71wt%CaO, 12.63wt%SiO 2 , 4.41wt%TiO 2 , 3.64wt%MgO, 1.00wt%MnO, 1.42wt%Al 2 o 3 , the balance is other impurities;

[0087] Inject oxygen into the mixed melt for 6 minutes, the flow rate of oxygen is 50L / (min kg), after the end of gas injection, the slag is naturally cooled;

[0088] From the cooled slag, the vanadium-containing metal iron that settled to the bottom in the slag is manually removed, the remaining slag is crushed to a particle size of 20-250 μm, the ore is ground, and the remaining vanadiu...

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Abstract

The invention belongs to the field of metallurgy, and in particular relates to a method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag. The method comprises the following steps of: sufficiently mixing blast furnace liquid molten titaniferous blast furnace slag and converter vanadium-containing steel slag flowing out from slag discharge holes, so as to form mixed molten slag, blowing an oxidization gas into a mixed molten body, after the gas blowing is accomplished, naturally cooling down the molten slag, manually taking out the vanadium-containing metal iron which is settled to the bottom of the molten slag, further separating the rest vanadium-containing metal iron in a magnetic separation mode, and finally separating titaniferous ingredients in the molten slag from gangue phase by using a gravity separation method so as to obtain titanium concentrate and tailings the main phases which are perovskite phases, wherein the mass percentage of TiO2 in the titanium concentrate is 35-50%. According to the method, the physical thermal resource of the molten slag is sufficiently utilized, the efficiency is high, the energy is saved, and meanwhile the titanium ingredient, the iron ingredient, the vanadium ingredient and the free calcium oxide ingredient in the mixed molten slag are recycled, so that the purpose of comprehensive high-efficiency recycling on secondary resource is achieved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for separating titanium-iron-vanadium-calcium from titanium-containing mixed slag. Background technique [0002] As we all know, my country is a country rich in titanium resources, which contains abundant resources of vanadium-titanium magnetite. Vanadium-titanium magnetite is a multi-element paragenetic iron ore mainly composed of iron, vanadium and titanium, accompanied by various valuable elements. After the vanadium-titanium magnetite is separated through the traditional metallurgical process "blast furnace ironmaking-converter steelmaking", titanium-containing blast furnace slag and vanadium-titanium steel slag are produced. [0003] Titanium-containing blast furnace slag is produced in the blast furnace ironmaking process of vanadium-titanium magnetite. Its TiO 2 The content is 6%~30%, the content of vanadium-containing pig iron is 4%~8%, and the content of ...

Claims

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Application Information

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IPC IPC(8): C21B3/06C22B7/04C22B34/12C22B34/22C22B26/20
CPCY02P10/20Y02W30/50
Inventor 张力张武张菊花
Owner NORTHEASTERN UNIV
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