Method of preparing compound flocculating agent by utilizing fly ash and killing pickle
A technology of composite flocculant and pickling waste liquid, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of waste of resources, pollution of the environment, and incomprehensible utilization of enterprises, and achieve good results
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[0046] Example 1
[0047] The method for preparing a composite flocculant by adopting fly ash and pickling waste liquid in the present invention includes the following steps:
[0048] A. Roasting: add fly ash and Na in the crucible 2 CO 3 , The roasting temperature is 800℃, and the time is 50min, so that the aluminum and silicon in the fly ash will be transformed into the amorphous body or crystal with greater activity;
[0049] B. Acid leaching: add the waste pickling liquid to the roasted fly ash, stir for 0.5h in a constant temperature water bath at 80°C, and filter to obtain acid leaching filtrate and filter residue. The filter residue is dried and finely ground; The main components of the waste liquid include 11% sulfuric acid and 19% ferrous sulfate;
[0050] C. Alkali dissolution: Add the filter residue in step B to an alkaline solution and boil for 4 hours, filter the reaction solution, and the filtrate is a sodium silicate solution;
[0051] D. Polymerization with acid additio...
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[0053] Example 2
[0054] The method for preparing a composite flocculant by adopting fly ash and pickling waste liquid in the present invention includes the following steps:
[0055] A. Roasting: add fly ash and Na in the crucible 2 CO 3 , The roasting temperature is 850℃, and the time is 60min, so that the aluminum and silicon in the fly ash will be transformed into the amorphous body or crystal with greater activity;
[0056] B. Acid leaching: add the waste pickling liquid to the roasted fly ash, stir in a constant temperature water bath at 90°C for 1 hour, and filter to obtain the acid leaching filtrate and filter residue. The filter residue is dried and finely ground; The main components of the liquid include 11% sulfuric acid and 19% ferrous sulfate;
[0057] C. Alkali dissolution: Add the filter residue in step B to an alkaline solution and boil for 5 hours, filter the reaction solution, and the filtrate is a sodium silicate solution;
[0058] D. Polymerization with acid additio...
Example Embodiment
[0060] Example 3
[0061] The method for preparing a composite flocculant by adopting fly ash and pickling waste liquid in the present invention includes the following steps:
[0062] A. Roasting: add fly ash and Na in the crucible 2 CO 3 , The roasting temperature is 950℃, and the time is 80min, so that the aluminum and silicon in the fly ash will be transformed into the amorphous body or crystal with greater activity;
[0063] B. Acid leaching: add the waste pickling solution to the roasted fly ash, stir for 1.5h in a constant temperature water bath at 100°C, and filter to obtain the acid leaching filtrate and filter residue. The filter residue is dried and finely ground; The main components of the waste liquid include 11% sulfuric acid and 19% ferrous sulfate;
[0064] C. Alkali dissolution: add the filter residue in step B to an alkaline solution and boil for 6 hours, filter the reaction solution, and the filtrate is a sodium silicate solution;
[0065] D. Polymerization with acid ...
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