Method for producing superfine talcum powder by adopting mixed grinding technology
A technology of ultra-fine talc powder and mixed grinding, which is applied in chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc. It can solve the problems of reducing production costs, talc powder structure changes, and poor particle uniformity, so as to improve mechanical properties. , Narrow particle size distribution and low degree of agglomeration
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[0022] Example 1
[0023] Weigh 40g of talc powder with a fineness of 1250 mesh, mix it with 800g zirconia microspheres with a diameter of 0.1~0.2mm and add it to the grinding container of the sand mill. The effective volume of the grinding container is 750mL, and adjust it to sand mill The linear speed of the machine is 4.7m / s, and the grinding time is 30min; then 160g of deionized water is added, and the linear speed of the sand mill is adjusted to 12.6m / s, and the grinding time is 12.6m / s. 25min. After the grinding, the obtained slurry is filtered, spray-dried and jet pulverized to obtain ultrafine talc powder with an average particle size of 367.4nm.
Example Embodiment
[0024] Example 2
[0025] Weigh 40g of talc powder with a fineness of 1250 mesh, mix it with 800g zirconia microspheres with a diameter of 0.1~0.2mm and add it to the grinding container of the sand mill. The effective volume of the grinding container is 750mL, and adjust it to sand mill The linear speed of the machine is 6.3m / s, dry grinding is carried out, and the grinding time is 30min; then 160g of deionized water is added, and the linear speed of the sand mill is adjusted to 12.6m / s, and the wet grinding is carried out. 25min. After the grinding, the obtained slurry is filtered, spray-dried and jet pulverized to obtain ultrafine talc powder with an average particle size of 293.2 nm.
Example Embodiment
[0026] Example 3
[0027] Weigh 40g of talc powder with a fineness of 1250 mesh, mix it with 800g zirconia microspheres with a diameter of 0.1~0.2mm and add it to the grinding container of the sand mill. The effective volume of the grinding container is 750mL, and adjust it to sand mill The linear speed of the machine is 7.9m / s, dry grinding is carried out, and the grinding time is 30min; then 160g of deionized water is added, and the linear speed of the sand mill is adjusted to 12.6m / s, and the wet grinding is carried out. 25min. After the grinding, the obtained slurry is filtered, spray-dried and jet pulverized to obtain ultrafine talc powder with an average particle size of 421.1 nm.
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