Zirconium Silicate Powder Crushing Processing And Numerical Optimization

As opacifier, zirconium silicate is widely used in all kinds of ceramic industry, and is irreplaceable raw materials of ceramic glaze in currently ceramic production. With the continuous development of the ceramic industry, the quality of zirconium silicate products is also higher and higher. Based on the previous research of the process parameters, this paper aims to optimize process parameters, including the ball material ratio, rotation speed, ball milling time and grinding agent, in order to improve the production efficiency. Crushing kinetic equation was introduced for the crushing process to provide a theoretical guidance for the optimization of grinding conditions in the production of superfine zirconium silicate.The orthogonal experiment of zirconium silicate wet ball milling was carried out in a 600x520 ball mill, and the optimal process parameters of the ball mill were obtained as follows: 48 rpm of mill speed, 5:1 of ball material ratio and 22 hours of the most appropriate milling time.By studying various grinding aids, four effective kinds of which were determined, including six partial sodium phosphate, citric acid, triethanolamine and ethylene glycol. Considered power consumption and the median particle diameter, the optimal dosages of four kinds of grinding aids were determined as follows: ethylene glycol 2%, triethanolamine 1%, citric acid 2% and six partial sodium phosphate 1%. When the median particle size reached 2μ m, the grinding time was shortened by 37.7%, 17.8%, 5% and 2% with the adding of ethylene glycol, triethanolamine, citric acid and six partial sodium phosphate respectively. During the coarse grinding stage, appropriate amount of effective aids can help to improve the grinding efficiency, which can provide reference data for the wet milling grinding superfine zirconium silicate segment.The grinding kinetic equation was introduced into the zirconium silicate powder ball milling, and it can be found that the equation can be derived in the form of φ=φ₀?e^-k?t^m, whether or not grinding aids are added, and the values of k and m were determined under different grinding conditions. The results of the equation theory were verified to be in good agreement with the experimental results. The dynamic equations can make up for the shortage in experimental study of zirconium silicate powder and provide theoretical guidance for the optimization of grinding conditions in the production of superfine zirconium silicate.The relationship model between milling time, ball to material ratio and mill speed with median grain size values of zirconium silicate powder was set up based on the experimental data. It is found that the most important factor on the median grain size value is ball milling time, then ball to material ratio; mill speed. The regression model about the grinding efficiency when the median grain size value reaches the target value of 2μ m was established, and the most suitable ball to material ratio and mill speed in theory were determined, which makes the lowest power consumption and production cost.