Preparation method of coarse whiting special for papermaking
A heavy calcium and calcite technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of unstable conditions, large powder particle size, low output, etc., and achieve good environmental benefits, good economic benefits, and high output.
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[0017] Such as figure 1 Shown, the preparation method step of special heavy calcium for papermaking is as follows:
[0018] S1 Primary crushing: Clean and screen the calcite ore; carry out the primary coarse crushing of the cleaned and screened calcite by 4-6cm; carry out the secondary crushing and fine crushing of the calcite after coarse crushing by 1-2cm; carry out the fine crushing of the calcite dry grinding;
[0019] S2 classification: classify the calcite powder obtained after dry grinding, and collect 600-mesh fine powder;
[0020] S3 slurry preparation: mix the collected 600-mesh calcite powder with water, and the solid content is 70%~80%;
[0021] S4 Wet grinding: wet grinding the slurry obtained by mixing slurry, adding polyacrylic acid grinding medium as zirconia micro-beads in the grinding, the weight ratio of grinding medium to zirconia micro-beads is 1:1.4~1:3.5, The speed of wet grinding is 1300 rpm~1700 rpm;
[0022] S5 passing through a vibrating sieve: p...
Embodiment 1
[0026] The raw material used is calcite ore, which is cleaned and screened, and then sent to a crusher for coarse crushing to a size smaller than or equal to 6 mm; the coarsely crushed calcite is then finely crushed to a size smaller than or equal to 2 mm to produce calcite fine powder; The finely crushed calcite fine powder is sent to Yifeng Mill for dry grinding, and after grinding, it is graded and screened to collect 600-mesh calcite fine powder; the 600-mesh calcite fine powder accounts for 70% of the solid content and 30% of water The ratio of % is made into a slurry; the prepared slurry is sent to a wet grinding machine, and polyacrylic acid and grinding media zirconia microbeads are added to grind it to form a slurry with a 2um content of 80-95. The material and oxidation The weight ratio of zirconium microbeads is 1:2.0, and the rotational speed of the wet grinding machine is 1700 rpm; the slurry obtained after wet grinding is passed through a vibrating sieve, and the ...
Embodiment 2
[0028] The raw material used is calcite ore, which is cleaned and screened, and then sent to the crusher for coarse crushing to less than or equal to 4mm; the coarsely crushed calcite is then finely crushed to be less than or equal to 1mm by the crusher to make calcite fine powder; Send the finely crushed calcite fine powder into dry grinding, and carry out classification treatment after grinding, and screen and collect 600-mesh calcite fine powder; mix 600-mesh calcite fine powder according to the ratio of solid content to 80% and water to 20%. into a slurry; the prepared slurry is sent to a wet grinding machine, and polyacrylic acid and grinding media zirconia microbeads are added to grind it into a slurry with a 2um content of 80-95. The material and zirconia microbeads The weight ratio is 1:3.5, and the speed of the wet grinding machine is 1300 rpm; the slurry obtained after wet grinding is passed through a vibrating sieve, and impurities such as zirconia microbeads and lar...
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