Method for preparing sludge with strongly-acidic fluorine-containing waste water to prepare calcium fluoride concentrate
A waste water treatment, calcium fluoride technology, applied in the direction of calcium/strontium/barium fluoride, calcium/strontium/barium halide, solid separation, etc., can solve the problem of limited landfill disposal capacity, low usage, fluorine resources and land Waste of resources and other issues, to achieve significant social value and environmental significance, to solve the pressure of landfill, to meet the effect of resource utilization
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Example Embodiment
[0019] Example one
[0020] This embodiment provides a method for preparing calcium fluoride concentrate using strong acidic fluorine-containing wastewater treatment sludge, which includes the following steps:
[0021] Step 1. The calcium fluoride sludge is pretreated, and the treated calcium fluoride sludge is made into slurry, and then mixed and stirred with the capture agent, foaming agent and regulator for flotation treatment. The specific operation is:
[0022] 1) The dry sludge containing calcium fluoride in the photovoltaic industry is first coarsely sieved through a 20-mesh sieve to remove massive gangue impurities, and then ground under the sieve, and then passed through a 200-mesh sieve.
[0023] 2) Mix the sieved calcium fluoride sludge with water and stir, and the volume ratio of calcium fluoride sludge to water is 1:15 to obtain calcium fluoride sludge slurry.
[0024] 3) Then the capture agent, foaming agent and regulator are sequentially added to the calcium fluoride slu...
Example Embodiment
[0037] Example two
[0038] This embodiment provides a method for preparing calcium fluoride concentrate using strong acidic fluorine-containing wastewater treatment sludge, which includes the following steps:
[0039] Step 1. The calcium fluoride sludge is pretreated, the treated calcium fluoride sludge is made into a slurry, and then mixed and stirred with the capture agent, foaming agent and regulator for flotation treatment. The specific operation is:
[0040] 1) The dry calcium fluoride-containing sludge from the photovoltaic industry is first coarsely sieved through a 50-mesh sieve to remove massive gangue impurities, and then the under-sieve is ground and then passed through a 100-mesh sieve.
[0041] 2) Mix the sieved calcium fluoride sludge and water, and the volume ratio of calcium fluoride sludge to water is 1:20 to obtain calcium fluoride sludge slurry.
[0042] 3) Then the capture agent, foaming agent and regulator are sequentially added to the calcium fluoride sludge slur...
Example Embodiment
[0055] Example three
[0056] This embodiment provides a method for preparing calcium fluoride concentrate using strong acidic fluorine-containing wastewater treatment sludge, which includes the following steps:
[0057] Step 1. The calcium fluoride sludge is pretreated, the treated calcium fluoride sludge is made into a slurry, and then mixed and stirred with the capture agent, foaming agent and regulator for flotation treatment. The specific operation is:
[0058] 1) The dry sludge containing calcium fluoride in the photovoltaic industry is first coarsely sieved through a 40-mesh sieve to remove massive gangue impurities, and then the under-sieve is ground and then passed through a 150-mesh sieve.
[0059] 2) Mix the sieved calcium fluoride sludge with water and stir, and the volume ratio of calcium fluoride sludge to water is 1:17 to obtain calcium fluoride sludge slurry.
[0060] 3) Then the capture agent, foaming agent and regulator are sequentially added to the calcium fluoride s...
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