A kind of preparation method of acid-soluble titanium slag

A technology of acid-soluble titanium slag and titanium slag, which is applied in furnaces, electric furnaces, furnace types, etc., can solve the problems of poor raw material applicability, long reaction time, and separation of titanium and iron, and achieve pollution reduction, short reaction time, and reduced reaction time. the effect of time

Active Publication Date: 2022-03-04
CHONGQING UNIV
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  • Abstract
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Problems solved by technology

[0006] Aiming at the above-mentioned problems existing in the prior art, the present invention aims to overcome the problems existing in the existing acid-soluble titanium slag preparation process, and the technical problems solved include the separation of ferro-titanium, the generation of rutile phase, high energy consumption, long reaction time, and poor applicability of raw materials and other technical issues

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  • A kind of preparation method of acid-soluble titanium slag
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  • A kind of preparation method of acid-soluble titanium slag

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Embodiment 1

[0036] Embodiment 1: a kind of preparation method of acid-soluble titanium slag comprises the following steps:

[0037] (1) Ball mill ilmenite and magnesium-containing slag to about 50 μm, and then mix with graphite, additive Na 2 CO 3 Send them together into a mixer for mixing, make pellets and dry at 120°C; wherein, the mass ratio of ilmenite, reducing agent, additive and modifier is: 100:12:6:3.

[0038] (2) Put the pellets in step (1) into an electric furnace for semi-molten smelting, and at the same time pass in argon gas to obtain semi-molten pellets; the conditions for the reduction are: control the reaction temperature to 1380°C, and keep the temperature constant Treat for 90min.

[0039] (3) The semi-molten pellets in step (2) are crushed by a crusher until the particle size is -50 mesh, accounting for 70-100%, to obtain a mixture of slag and iron, and the metal iron particles are screened out during the coarse grinding process; to obtain metal iron:

[0040] (4) ...

Embodiment 2

[0042] Embodiment 2: a kind of preparation method of acid-soluble titanium slag comprises the following steps:

[0043] (1) Ball mill ilmenite and magnesium-containing slag to about 125 μm, and then mix with graphite, additive Na 2 CO 3 Send them together into a mixer and mix them evenly to form pellets and dry them at 120°C; the mass ratio of ilmenite, reducing agent, additive and modifier is: 100:12:7:4.

[0044] (2) Put the pellets in step (1) into an electric furnace for semi-melting smelting, and at the same time pass in argon (containing 5% CO) to obtain semi-molten pellets; the conditions for the reduction are: control the reaction The temperature is 1400°C, and it is treated at constant temperature for 80 minutes.

[0045](3) The semi-molten pellets in step (2) are crushed by a crusher until the particle size is -50 mesh, accounting for 70-100%, to obtain a mixture of slag and iron, and the metal iron particles are screened out during the coarse grinding process; to ...

Embodiment 3

[0048] Embodiment 3: a kind of preparation method of acid-soluble titanium slag comprises the following steps:

[0049] (1) Ball mill ilmenite and magnesium-containing slag to about 200 μm, then mix with graphite, additive Na 2 CO 3 Send them together into a mixer to mix evenly, make pellets and dry at 120°C; wherein, the mass ratio of ilmenite, reducing agent, additive and modifier is: 100:12:8:5.

[0050] (2) Put the pellets in step (1) into an electric furnace for semi-melt smelting, and at the same time pass in argon (containing 10% CO) to obtain semi-molten pellets; the conditions for the reduction are: control the reaction The temperature is 1420°C, and it is treated at constant temperature for 70 minutes.

[0051] (3) The semi-molten pellets in step (2) are crushed by a crusher until the particle size is -50 mesh, accounting for 70-100%, to obtain a mixture of slag and iron, and the metal iron particles are screened out during the coarse grinding process; to obtain me...

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Abstract

The invention relates to a preparation method of acid-soluble titanium slag, comprising the following steps: ball-milling and mixing ilmenite, a reducing agent, an additive and a modifier to form pellets and drying; The semi-molten reduction is carried out under the same conditions to obtain semi-molten pellets. The mixed gas is introduced into the reaction system throughout the reaction process to play the role of protection, reduction and stirring; the semi-molten pellets are broken to obtain a slag-iron mixture. In the process of crushing, the metal iron particles are screened out; the slag-iron mixture is wet-milled, and magnetic separation is performed during the wet-grinding process. The magnetically separated material is wet-milled in clean water again, and circulated in sequence, and the titanium slag is suspended in the water to form a suspension. ; Filter the suspension and dry it to obtain titanium slag. The invention can reduce the smelting temperature and smelting time, save energy, high efficiency and reduce environmental pollution, so that the production efficiency is high, the production process is short, the acid consumption is small, the generation of waste pollutants is effectively reduced, and the clean production of titanium dioxide is realized.

Description

technical field [0001] The invention relates to the technical field of pyrometallurgy of nonferrous metals, in particular to a preparation method of acid-soluble titanium slag. Background technique [0002] my country's titanium ore resources are mainly relatively low-grade titanium resources such as vanadium-titanium magnetite and ilmenite, and rutile ore is less. And with the rapid development of the titanium industry, the reserves of high-grade titanium minerals around the world are gradually exhausted, and low-grade titanium resources are getting more and more attention. At present, a considerable part of titanium concentrate is processed into titanium slag through electric furnace smelting. Titanium slag can be divided into high titanium slag and low titanium slag. High-titanium slag is mainly used in the production of titanium dioxide by the chloride method and the production of sponge titanium. Low-titanium slag is easily dissolved by sulfuric acid, so it is also c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/12C22B1/24C22B5/10C21B13/12
CPCC22B34/12C22B1/2406C22B5/10C21B13/12C21B13/006C21B13/008
Inventor 辛云涛吕晓东吕学伟李刚白晨光吕炜党杰余文轴游志雄胡丽文向俊一
Owner CHONGQING UNIV
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