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Method for adjusting calcination temperature of rutile type titanium dioxide and automatic control method thereof

A technology of rutile titanium dioxide and calcination temperature, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of not strictly controlling the calcination temperature, adjusting the reaction time lag, and high production cost, so as to reduce the manual workload, The effect of reducing work difficulty and reducing production costs

Active Publication Date: 2015-04-08
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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AI Technical Summary

Problems solved by technology

In the process of traditional calcination of rutile titanium dioxide, the calcination temperature in the rotary kiln is generally not strictly controlled, but the heat supply of the combustion chamber is adjusted by continuously testing the conversion rate and quality indicators of the obtained titanium dioxide, which inevitably has the adjustment reaction time Severe lag, affecting the final product quality
At the same time, in order to obtain a higher conversion rate, manufacturers often heat by increasing the calcination temperature, so the energy consumption is high and the production cost is high.

Method used

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  • Method for adjusting calcination temperature of rutile type titanium dioxide and automatic control method thereof

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Embodiment

[0060] An enterprise produces a kind of rutile titanium dioxide with a designed production capacity of 40,000 tons, a rotary kiln with a diameter of 3.6m and a length of 58m. The original process is as follows:

[0061] The implementation process is as follows:

[0062] (1) Through the adjustment of production capacity, gas flow, air flow, kiln speed, etc., it is determined that the length of the crystal transformation zone of the rotary kiln is 6.5m.

[0063] (2) Determine the relationship between production capacity and calcination temperature through industrial tests of different production capacities, and establish process control table 1, which shows the calcination temperature corresponding to part of production capacity.

[0064] Table 1 Production capacity and its corresponding calcination temperature

[0065] serial number

production capacity

temperature °C

1

60% design capacity

825

2

80% design capacity

845

3

...

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Abstract

The invention discloses a method for adjusting calcination temperature of rutile type titanium dioxide, which can be used for adjusting the calcination temperature of the rutile type titanium dioxide in real time according to specific productivity of a rotary kiln. The method comprises the following steps: determining the corresponding calcination temperature when the rotary kiln is used for performing production according to different productivities; selecting the calcination temperature of a corresponding crystal form transformed band; and performing real-time detection on the calcination temperature of the rotary kiln in the production process, and then adjusting the calcination temperature of the rotary kiln. The invention also discloses an automatic control method for the method for adjusting the calcination temperature of rutile type titanium dioxide. By adopting the automatic control method, a detection device is used for transmitting productivity conditions of the rotary kiln to a PLC (programmable logic controller), and then the PLC controls the corresponding temperature adjusting equipment to adjust the calcination temperature of the crystal form transformed band, so that automatic control is realized. By virtue of the calcination temperature adjusting method, the production energy consumption can be reduced, and the finished product quality of titanium dioxide can be ensured; and meanwhile, by virtue of the automatic control method, automatic control can be realized, the working efficiency can be improved, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide production, in particular to a method for adjusting the gradient calcining temperature of rutile titanium dioxide and an automatic control method for adjusting the calcining temperature of rutile titanium dioxide. Background technique [0002] It is known that rutile titanium dioxide is obtained from metatitanic acid material added with salt treatment agent and crystal seed, calcined in a rotary kiln for dehydration, desulfurization, and crystal transformation. Dehydration, desulfurization, and crystal transformation are realized by gradually lowering the temperature of the hot flue gas from the calcining rotary kiln. The length and temperature of the dehydration zone, desulfurization zone and crystal transformation zone can be realized by adjusting the relevant parameters of the calcining rotary kiln. At the same time, the length and temperature of the dehydration zone, desulfurization z...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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任艳丽
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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