A simulation analysis method for the growth of metatitanic acid particles in the hydrolysis process of titanyl sulfate
A titanium oxysulfate, simulation analysis technology, applied in particle size analysis, individual particle analysis, particle and sedimentation analysis, etc., can solve problems such as inability to rework and affect the quality of finished titanium dioxide, and achieve the effect of improving quality
Inactive Publication Date: 2017-12-08
CHONGQING UNIV
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Problems solved by technology
Since the formation of crystal nuclei of metatitanic acid particles can be controlled by adding external seeds and other measures, and the growth of particles is irreversible, improper operation cannot be reworked and remedied, which will directly affect the operation of the subsequent process and the quality of the finished titanium dioxide.
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[0029] 1) Use online particle analysis technology to monitor the total number and average particle size of metatitanic acid particles in the hydrolysis process of titanyl sulfate in real time, and record the change curve of the total number of particles and average particle size over time from the end of feeding to the equilibrium of the hydrolysis reaction picture;
[0030] Described step 1) comprises the following steps:
[0031] 1.1) The titanium solution and water (raw material) for preparing titanium dioxide by the sulfuric acid method are placed in a reactor for hydrolysis reaction, and the volume ratio of the two is 4:1;
[0032] At the same time, the number and average particle size of metatitanic acid particles during the hydrolysis process of titanyl sulfate were detected in real time by using a focusing beam reflectance measurement instrument (FBRM);
[0033] The titanium liquid which was first added to the reactor and preheated to 95°C, and then also preheated to ...
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The invention relates to a method for simulating and analyzing the growth of metatitanic acid particles in the hydrolysis process of titanyl sulfate. Specifically, the number and average particle size of metatitanic acid particles in the hydrolysis process of titanyl sulfate are detected in real time by an online particle analysis technology-focused light velocity reflection measuring instrument. Based on the variation trend of diameter with time, according to the results of experimental detection, the Sigmoidal-Boltzmann equation is used to regress and fit the total number of particles and the average particle size of each stage with time, so as to obtain the partial titania in the titanyl sulfate hydrolysis process. Acid particle growth law model. The invention solves the problems that the hydrolysis reaction speed is difficult to grasp, the particle size distribution of metatitanic acid is not uniform during the hydrolysis process, and the quality of the final product of titanium dioxide is not high. At the same time, the growth law of the particles in the hydrolysis process is mastered, and the hydrolysis process is modeled. It is beneficial to follow-up research.
Description
technical field [0001] The invention relates to a method for simulating and analyzing the growth of metatitanic acid particles in the hydrolysis process of titanyl sulfate. Specifically, the number and average particle size of metatitanic acid particles in the hydrolysis process of titanyl sulfate are detected in real time by an online particle analysis technology-focused light velocity reflection measuring instrument. Based on the change trend of diameter over time, according to the results of experimental detection, the Sigmoidal-Boltzmann equation is used to regress and fit the total number of particles and the change of average particle size over time in each stage, so as to obtain the partial titania in the hydrolysis process of titanyl sulfate Acid particle growth law model. [0002] The invention solves the problems that the hydrolysis reaction speed is difficult to grasp, the particle size distribution of metatitanic acid is not uniform during the hydrolysis process, a...
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IPC IPC(8): G01N15/02G01N15/14
Inventor刘清才周强陈奎林凡方诗惠王小青姚璐朱博洪孟飞赵冬路瑞芳
OwnerCHONGQING UNIV