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Method for preparing artificial rutile from high titanium slag

A technology of artificial rutile and high-titanium slag, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high energy consumption, long roasting treatment time, and long production cycle

Inactive Publication Date: 2017-11-28
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that the heating rate of the roasting process is slow, and the roasting treatment time is long, resulting in a long production cycle and high energy consumption.

Method used

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  • Method for preparing artificial rutile from high titanium slag

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preparation example Construction

[0034] The steps of the preparation method are as follows:

[0035] A. Crushing

[0036] First, the high-titanium slag is ground to -100 mesh to more than 80% by weight using a grinding device to obtain a high-titanium slag powder.

[0037] The high-titanium slag used in the present invention is a product obtained by separating slag and iron after ilmenite is smelted in an electric furnace. TiO by weight 2 The content of SiO is above 85%. 2 Below 4.0%.

[0038] Among them, TiO 2 The content is determined by the aluminum reduction method according to the GB / T1706-2006 standard. SiO 2 It is determined by perchloric acid dehydration gravimetric method according to YB / T190.1-2001 standard.

[0039] In the present invention, the existing grinding equipment and screening equipment are used for grinding and screening, for example, the grinding equipment sold by Nanchang General Laboratory Sample Preparation Factory under the trade name sealed sample preparation grinder (JG100-...

Embodiment 1

[0075] Embodiment 1: the preparation of artificial rutile

[0076] The implementation steps of this embodiment are as follows:

[0077] A. Crushing

[0078] The high titanium slag was chemically analyzed by the method described in this specification, and its TiO 2 The content is 85.5% by weight, SiO 2 At 3.94%. Grinding the high titanium slag to -100 mesh is more than 80% by weight using the grinding equipment sold by Nanchang General Laboratory Prototyping Machine Factory under the trade name sealed sample preparation grinder (JG100-3) to obtain a high titanium slag powder ,Then

[0079] B. Alkaline leaching to remove impurities

[0080] Mix the high-titanium slag powder obtained in step A with a sodium hydroxide solution with a concentration of 22% by weight according to a solid-to-liquid ratio of 1:5.5, and then use a constant temperature heating magnetic stirrer ( DF-101S) to carry out alkaline leaching and impurity removal treatment for 60 min, and then use the filt...

Embodiment 2

[0087] Embodiment 2: the preparation of artificial rutile

[0088] The implementation steps of this embodiment are as follows:

[0089] A. Crushing

[0090] The high titanium slag was chemically analyzed by the method described in this specification, and its TiO 2 The content is 86.3% by weight, SiO 2 At 3.87%. Grinding the high titanium slag to -100 mesh is more than 80% by weight using the grinding equipment sold by Nanchang General Laboratory Prototyping Machine Factory under the trade name sealed sample preparation grinder (JG100-3) to obtain a high titanium slag powder ,Then

[0091] B. Alkaline leaching to remove impurities

[0092] Mix the high-titanium slag powder obtained in step A with a sodium hydroxide solution with a concentration of 25% by weight according to a solid-to-liquid ratio of 1:6, and then use a constant temperature heating magnetic stirrer ( DF-101S) to carry out alkaline leaching and impurity removal treatment for 90 min, and then use the filter...

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Abstract

The invention relates to a method for preparing artificial rutile from high titanium slag. The method comprises the following steps: crushing high titanium slag, performing alkaline leaching decontamination, performing modification roasting, performing acid decontamination, calcining and the like. According to the method, microwaves are adopted as a heat source, so that the heating velocity is increased, the heating effect is improved, and meanwhile the reaction energy consumption is reduced when being compared with that of conventional roasting; the roasting temperature of the high titanium slag is reduced, a roasting process is simple, the grade of titanium dioxide is ensured, furthermore the obtained artificial rutile meets a chlorination process for producing titanium dioxide, the production cycle is greatly shortened, and the production cost is lowered; and meanwhile, due to acid-alkali combined leaching, impurities such as calcium oxide, aluminum oxide and silicon dioxide in the high titanium slag are effectively removed, and the grade of the rutile is greatly increased.

Description

technical field [0001] The invention relates to a method for preparing artificial rutile from high-titanium slag, which belongs to the technical field of microwave metallurgy. Background technique [0002] High-titanium slag is the product of separation of slag and iron after reduction and smelting of ilmenite in an electric furnace, and is used as a high-quality raw material for the production of artificial rutile. With the development of titanium industry, natural rutile resources are gradually exhausted, and there is an urgent need to enrich titanium-rich materials. Artificial rutile is a titanium-rich material with the same composition and structural properties as natural rutile. It is a high-quality substitute for natural rutile and can be used for the production of titanium dioxide by the chloride method. At present, the production methods of artificial rutile include electrothermal method, reduction corrosion method and acid leaching method. [0003] Traditional hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047
CPCC01G23/047C01P2002/72C01P2006/80
Inventor 陈菓刘钱钱陈晋廖雪峰彭金辉何奥希李毅恒冯康露
Owner YUNNAN MINZU UNIV
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