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Calcining method for preparing rutile-type titanium dioxide powder

A technology for preparing gold from rutile titanium dioxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of poor quality of rutile titanium dioxide products, low conversion rate of production raw materials, high production energy consumption, etc., and achieve heat preservation time Short, reduce production costs, reduce the effect of production energy consumption

Inactive Publication Date: 2015-05-06
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

[0005] As a result, the conversion rate of raw materials in the production process of rutile titanium dioxide is low, the product quality of rutile titanium dioxide is poor, and the production energy consumption is high; a large amount of energy is wasted; resulting in high production costs

Method used

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  • Calcining method for preparing rutile-type titanium dioxide powder
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  • Calcining method for preparing rutile-type titanium dioxide powder

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Embodiment

[0074] A manufacturer produces a kind of rutile titanium dioxide. The raw material is metatitanic acid. The calcining equipment used is a calcining rotary kiln with a designed production capacity of 40,000 tons. The original process parameters obtained by implementing the traditional process are shown in Table 1:

[0075] Table 1 Original process parameters

[0076]

[0077] 1. Determine the optimal calcination temperature T and holding time t

[0078] 1.1 According to the production raw material is metatitanic acid, and the salt treatment agent used; the salt treatment agent is zinc sulfate, zinc chloride, zinc oxide, aluminum oxide, etc. It is detected that the theoretical transformation temperature range of the production raw material into titanium dioxide is 800-1000°C; the holding time of the production raw material in the calcination equipment is 60-90min; the calcination temperature of the production raw material is determined to be 800°C, and the holding time is t1=...

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Abstract

The invention discloses a calcining method for preparing rutile-type titanium dioxide powder and capable of reducing the energy consumption in the production process of rutile-type titanium dioxide powder. The calcining temperature and holding time in the calcining process of the method are determined by the following manner: determining a theoretical conversion temperature range and the holding time range of raw materials for the production; determining specific calcining temperature and the holding time and calcining a sample of the raw materials, if the conversion rate is not in line with production process requirements, adjusting the calcining temperature and the holding time again and calcining a sample of the raw materials until the conversion rate is in line with production process requirements; and based on the calcining temperature T and the holding time t, respectively calcining the sample of the raw materials at the calcining temperatures of T+10, T+20, T+30 (DEG C) and holding times of t-30, t-20, t-20, t+10, t+20 and t+30 (minutes) and detecting to obtain the optimal calcining temperature and the holding time. By the method, the energy consumption in the production is reduced and the production cost is decreased.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide production, in particular to a calcining method for preparing rutile titanium dioxide. Background technique [0002] It is well known that with the acceleration of social development and the improvement of living standards, especially the rapid development of construction and decoration industries, the demand for rutile titanium dioxide is also increasing, especially since 2005, the world's largest titanium dioxide production The continuous increase of the price of titanium dioxide by the enterprise DuPont has led to the emergence of a large number of domestic titanium dioxide enterprises. The focus of these enterprises is to be able to produce qualified titanium dioxide products, without excessive requirements on energy consumption and process control. [0003] In the traditional production process, in order to obtain qualified products and improve the conversion rate of production raw ...

Claims

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Application Information

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IPC IPC(8): C01G23/08
CPCC01G23/08
Inventor 肖利黎建明薛念福陈新红李里王显云王敏莉
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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