On-line graying point judging device in titanium white production

A judging device and a technology for graying point, which are applied to the device for online judging graying point, a device field in the production of titanium dioxide, to achieve the effects of narrow particle size distribution, good pigment performance, and elimination of quality fluctuations

Active Publication Date: 2012-10-10
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are no online devices and automatic control measures for gray point determination at home and abroad.

Method used

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  • On-line graying point judging device in titanium white production
  • On-line graying point judging device in titanium white production
  • On-line graying point judging device in titanium white production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The UV723PCS spectrophotometer is used as the transmittance detection unit of the present invention, and the transmittance of the diluted titanium solution is detected after the above modification, and a computer is used as the output unit. dilute H 2 SO 4 The mass concentration of the dilute sulfuric acid solution in the storage device is 10%, and the flow ratio of the first metering pump and the second metering pump is adjusted to 1:100.

[0030] Take deionized water with 25% volume of the titanium solution and add it into the hydrolysis tank as bottom water, and preheat to 96° C. under stirring. The titanium solution preheated to 96°C, with a concentration of 230g / L and an F value of 1.85 was added to the hydrolysis tank at a uniform speed within 17 minutes, and the temperature of the hydrolysis system was maintained at 96°C during the feeding process. After the feeding is complete, the hydrolysis system is heated to the first boiling point (about 106° C.), and the...

Embodiment 2

[0034] Except adopting the single-chip microcomputer as the output unit, adopt the judging device of the online graying point identical with embodiment 1 to measure the light transmittance of the hydrolyzed titanium solution. Except that the flow ratio of the first metering pump and the second metering pump is adjusted to 1:200, the same process as in Example 1 is used to produce titanium dioxide, and the diluted titanium solution when the titanium solution reaches the first boiling point is used as a reference. Compared with the solution, the microcontroller will record the corresponding signal as 1amV. When the signal recorded by the single-chip microcomputer is 0.5amV (at this time, it is the gray point), the single-chip microcomputer immediately outputs a control signal to the control unit to stop the heating and stirring of titanium dioxide production. It took 11.2 minutes from the first boiling point to the graying point, and then aged for 25 minutes.

[0035] The parti...

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Abstract

The invention discloses an on-line graying point judging device in the titanium white production. The on-line graying point judging device comprises a transmittance detecting unit, an output unit and a control unit, wherein the transmittance detecting unit is connected with a hydrolyzer in the titanium white production and is used for detecting the transmittance of titanium liquid in real time; the output unit is connected with the transmittance detecting unit; and the control unit is connected with the output unit, and receives control signals output from the output unit to control the heating and stirring of the hydrolyzer in the titanium white production. The on-line graying point judging device can accurately judge greying points in the hydrolytic process of the titanium liquid, the prepared titanium pigment has uniform particle size distribution, narrow particle diameter distribution and high pigment performance, and simultaneously, the judgment of the graying points and the relevant control conditions are institutionalized, indexed and automated, thereby providing a new control technique and a new device for the titanium pigment production.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a device in the production of titanium dioxide, in particular to a device for online determination of graying points during the hydrolysis of titanium liquid. Background technique [0002] The production process of titanium dioxide is mainly divided into sulfuric acid method and chlorination method. At present, the sulfuric acid method is mostly used in China. The hydrolysis process is one of the most important processes in the production of titanium dioxide by the sulfuric acid method. The quality of hydrolysis not only affects the economics of industrial production, but also has a great impact on the quality of the final product. [0003] Taking the autogenous seed crystal thermal hydrolysis process as an example, it mainly includes the following steps: First, add the preheated hydrolyzed titanium solution into the deionized water that has been preheated to a certain temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G01N21/29C01G23/053
Inventor 田从学胡鸿飞唐勇杜剑桥陈新红李礼牛茂江胡晓程晓哲
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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