Titanium beneficiation method from titaniferous blast furnace slag

A blast furnace slag enrichment technology, which is applied in the direction of improving process efficiency, can solve problems such as separation difficulties, and achieve the effects of simple process, easy separation and utilization, and high grade titanium content

Active Publication Date: 2013-12-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the TiO in perovskite 2 The theoretical content of the perovskite is only 58%, and the density of th

Method used

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  • Titanium beneficiation method from titaniferous blast furnace slag

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Example Embodiment

[0017] Example 1:

[0018] The implementation of the present invention is Panzhihua Iron and Steel's actual titanium-containing blast furnace slag, whose components are: 27.73%CaO, 26.36%SiO 2 , 14.41%Al 2 o 3 , 8.31%MgO, 22.50%TiO 2 , 0.25%V 2 o 5 , 0.44%S. Add 2.5% slag weight of B 2 o 3 , under a reducing atmosphere (the sample is placed in a graphite crucible with a graphite cover, and the outer furnace tube of the crucible is protected by high-purity argon gas), melted at 1360°C for 20min, and then cooled to 1320°C at a cooling rate of 0.25°C / min After heat preservation for 360 minutes, after quenching and solidification in ice water, the slag sample was ground, polished and carbon-sprayed. According to the analysis of scanning electron microscope and electron probe, the enrichment degree of titanium reached 29.5%, and the grade of titanium in black titanite was 88.6%.

Example Embodiment

[0019] Example 2:

[0020] The implementation of the present invention is Panzhihua Iron and Steel's actual titanium-containing blast furnace slag, whose components are: 27.73%CaO, 26.36%SiO 2 , 14.41%Al 2 o 3 , 8.31%MgO, 22.50%TiO 2 , 0.25%V 2 o 5 , 0.44%S. Add 1.5% slag weight of B 2 o 3 , under a reducing atmosphere (the sample is placed in a graphite crucible with a graphite cover, and the outer furnace tube of the crucible is protected by high-purity argon gas), melted at 1360°C for 20min, and then cooled to 1320°C at a cooling rate of 0.25°C / min After heat preservation for 360 minutes, after quenching and solidification in ice water, the slag sample was ground, polished and carbon-sprayed. According to the analysis of scanning electron microscope and electron probe, the enrichment degree of titanium reached 23.5%, and the grade of titanium in black titanite was 87.7%.

Example Embodiment

[0021] Example 3:

[0022] The implementation of the present invention is Panzhihua Iron and Steel's actual titanium-containing blast furnace slag, whose components are: 27.73%CaO, 26.36%SiO 2 , 14.41%Al 2 o 3 , 8.31%MgO, 22.50%TiO 2 , 0.25%V 2 o 5 , 0.44%S. Add 1.5% slag weight of B 2 o 3 , under a reducing atmosphere (the sample is placed in a graphite crucible with a graphite cover, and the outer furnace tube of the crucible is protected by high-purity argon gas), melted at 1360 ° C for 20 minutes, and then cooled to 1200 ° C at a cooling rate of 1 ° C / min After 60 minutes of heat preservation, after quenching and solidification in ice water, the slag sample was ground, polished and carbon-sprayed. According to the analysis of scanning electron microscope and electron probe, the enrichment degree of titanium reached 31.5%, and the grade of titanium in black titanite was 91.8%.

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Abstract

The invention relates to a titanium beneficiation method from titaniferous blast furnace slag and belongs to the field of metallurgy waste residue comprehensive utilization technology. The method comprises the following steps: adding B2O3 with quantity of slag of 1.5-2.5% or solid H3BO3 additive with quantity of slag of 2.7-4.4% to titaniferous blast furnace slag with the titaniferous quantity of 22.5%, performing fusion, cooling and heat preservation treatment under the reducing condition, and performing quenching on the furnace slag in ice water. Through the adoption of the beneficiation method, more than 20% of titanium dispersed and distributed in the furnace slag is transferred to titanium-containing kainotype anosovite for beneficiation and seed out, and separation and extraction of titanium from titaniferous blast furnace slag are facilitated. The beneficiation method is simple in technology and low in cost; in addition, the titanium beneficiation phase has higher titaniferous content and can be directly used for extracting titanium, so that the titanium beneficiation method from titaniferous blast furnace slag has significant social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of metallurgical slag, and in particular relates to a method for enriching titanium in titanium-containing blast furnace slag. Background technique [0002] Panzhihua is the world-renowned capital of vanadium and titanium. The titanium reserves in its vanadium-titanium magnetite account for 90.54% of the domestic proven reserves and 35.17% of the world's proven reserves. However, the existing iron and steel production process is to smelt the vanadium-titanium magnetite concentrate through a blast furnace, and TiO 2 Basically enter the blast furnace slag, and discard it as waste together with the slag. TiO in Panzhihua Iron and Steel Blast Furnace Slag 2 The content is as high as 22-23%. Based on the annual output of 4 million tons of iron in Panzhihua Iron and Steel, the annual output of blast furnace slag is 3.2 million tons, of which about 900,000 tons are TiO 2 , The direct...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B34/12
CPCY02P10/20
Inventor 张建良任山邢相栋
Owner UNIV OF SCI & TECH BEIJING
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