Process method for preparing high-purity calcium aluminate and polyaluminum chloride
A technology of polyaluminum chloride and a process method is applied in the field of preparation of high-purity water purifying agents, can solve problems such as aluminum ash pollution, and achieve the effects of low cost, high product purity, and easy availability of raw materials
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Examples
Embodiment 1
[0024] Example 1: During the hydrolysis catalytic reaction step of the secondary aluminum ash: the liquid-solid ratio of the secondary aluminum ash to water is 7ml / g, the heating temperature is 100°C, the hydrolysis catalytic reaction time is 6h, and the acidolysis reaction of the primary solid phase In the step: the ratio of the primary solid phase to hydrochloric acid and water is 1:2:4, the reaction temperature is maintained at 60° C., and the reaction is fully stirred for 4 hours. In the secondary liquid phase polymerization step: the solid-to-liquid ratio is 20:1, and the solution Keep the pH between 2.5 and 4.5, keep heating to keep the reaction temperature at 60°C, and the aging time is 10h. In the secondary solid phase calcination step: the ratio of secondary solid phase to limestone in the ball mill is 1:2, and it must go through 2 stages After crushing, the particle size is 5-13mm, fully mixed in the ball mill and the grinding fineness reaches 200 mesh, and sent to th...
Embodiment 2
[0025] Example 2: During the hydrolysis catalytic reaction step of the secondary aluminum ash: the liquid-solid ratio of the secondary aluminum ash to water is 6ml / g, the heating temperature is 95°C, the hydrolysis catalytic reaction time is 5.5h, and the acidolysis of the primary solid phase In the reaction step: the ratio of the primary solid phase to hydrochloric acid and water is 1:2.5:4.5, the reaction temperature is maintained at 70°C, and the reaction is fully stirred for 11 hours. In the secondary liquid phase polymerization step: the solid-to-liquid ratio is 20:1, The pH of the solution is kept between 2.5 and 4.5, and the reaction temperature is maintained at 70°C by continuous heating, and the aging time is 11 hours. After grade crushing, the particle size is 5-13mm, fully mixed in the ball mill and the grinding fineness reaches 200 mesh, and sent to the rotary kiln, the kiln temperature is kept at 1100-1300°C, and calcined at high temperature for 3 hours to obtain c...
Embodiment 3
[0026] Example 3: During the hydrolysis catalytic reaction step of the secondary aluminum ash: the liquid-solid ratio of the secondary aluminum ash to water is 3ml / g, the heating temperature is 80°C, the hydrolysis catalytic reaction time is 4h, and the acidolysis reaction of the primary solid phase In the step: the ratio of the primary solid phase to hydrochloric acid and water is 1:3:5, the reaction temperature is maintained at 100° C., and the reaction is fully stirred for 12 hours. In the secondary liquid phase polymerization step: the solid-to-liquid ratio is 20:1, and the solution Keep the pH between 2.5 and 4.5, keep heating to keep the reaction temperature at 100°C, and the slaking time is 12 hours. In the secondary solid phase calcination step: the ratio of secondary solid phase to limestone in the ball mill is 7:13, and it must go through 2 stages After crushing, the particle size is 5-13mm, fully mixed in the ball mill and the grinding fineness reaches 200 mesh, and ...
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Description
Claims
Application Information
- IPC
- C01F7/16; C01F7/56; C02F1/52
- CPC
- C01F7/164; C01F7/56; C02F1/5245
- Inventors
- 不公告发明人