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Iron Steel Vanadium Titanium
Organizer:Pangang Group Company Ltd.

Sponsored by:Panzhihua Iron & Steel Institute Co.,Ltd. of Pangang Group

Edited & Published by:Editorial Board of Iron Steel Vanadium Titanium Overseas Distribution by China National Publishing Industry Trading Corporation

Chief Editor:Hu Hongfei

Serial Number:ISSN1004-7638 CN51-  1245/TF

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《Iron Steel Vanadium Titanium》---------------------------------2019  No.  2    ---------------------------------20190204

Application Study on the Grey Point Determination of Hydrolysis by On-line Instrument

        Lu Ruifang

        (Pangang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China)

        In this work,spectrophotometry was used to characterize the grey point of hydrolysis during titanium dioxide preparation via sulphate process.Employing the selfdeveloped online grey point determination instrument,the effects of scanning wavelength at a certain range and dilution ratio on the transmittance at gray point were studied for the hydrolysis process within adding external seeds,and the optimum scanning wavelength and dilution ratio were determined.Furthermore,the influences of two methods of grey point judgement,the online determination by the instrument and artificial observation,on the control level and process capability of hydrolysis process were compared.The results show that the control level and process ability of hydrolysis process could be improved significantly by using the selfdeveloped grey point detector instead of artificial observation.

Key  words
        titanium dioxide,sulphate process,hydrolysis,grey point,online grey point determination instrument,scanning wavelength,dilution rate


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