Preparation method of fluorine removal agent for water
A technology of defluoridation agent and water body, which is applied in the field of waste resource utilization, can solve the problems of high cost of defluoridation, secondary pollution of waste concrete, etc., and achieve the effect of wide source of raw materials, increased specific surface area and wide application range
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[0025] Example 1
[0026] In this embodiment, the method for preparing a water body defluorinating agent by using waste concrete has the following steps:
[0027] (1) Select waste concrete from construction waste, and use a small hammer crusher for primary crushing. Use a square-hole screen to control the particle size of the waste concrete after primary crushing d≤10mm, and load the primary crushed waste concrete into the muffle furnace Carry out low-temperature pre-calcination to weaken the bond strength between the aggregate and cement stone in the waste concrete. The specific calcination conditions are: heating up to 250°C at a rate of 6°C / min, and cooling to 25°C after 20 minutes of constant temperature.
[0028] (2) The calcined waste concrete is oscillated in an electromagnetic oscillating crusher to separate coarse aggregate and waste cement stone, and the separated cement stone is added to a ball mill for grinding to further increase its microstructure defects To increase i...
Example Embodiment
[0030] Example 2
[0031] In this embodiment, the method for preparing a water body defluorinating agent by using waste concrete has the following steps:
[0032] (1) Select waste concrete from construction waste, and use a small hammer crusher for primary crushing. Use a square-hole screen to control the particle size of the waste concrete after primary crushing d≤10mm, and load the primary crushed waste concrete into the muffle furnace Carry out low-temperature pre-calcination to weaken the bonding strength between the aggregate and cement stone in the waste concrete. The specific calcination conditions are: heating up to 400°C at a rate of 8°C / min, and cooling to 20°C after 20 minutes of constant temperature.
[0033] (2) The calcined waste concrete is oscillated in an electromagnetic oscillating crusher to separate coarse aggregate and waste cement stone, and the separated cement stone is added to a ball mill for grinding to further increase its microstructure defects To increas...
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