Method for producing ferro-aluminium composite water purifying agent using aluminium hydroxide mud
A technology of aluminum hydroxide and water purifying agent, which is applied in chemical instruments and methods, water/sludge/sewage treatment, sludge treatment, etc., can solve the problems of waste of land resources, secondary pollution, etc., and achieve simple manufacturing process, No secondary pollution, no waste of land resources
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Embodiment 1
[0014] The present invention uses the aluminum hydroxide sludge produced in the production of aluminum materials to produce a liquid composite aluminum-iron water purifier using the following process steps:
[0015] In the present invention, 70% by weight of iron-containing waste acid solution (waste iron-containing hydrochloric acid, acid content> 8%) is added to the reaction tank, and 30% by weight of aluminum hydroxide sludge is gradually added, and the reaction is stirred at normal temperature to make the aluminum hydroxide pollute. The sludge is completely reacted and dissolved, and a liquid composite aluminum-iron water purifier is gradually formed. Use a precision pH test paper of 0 to 5 to detect the pH value to control the pH value at 3.0. If the pH value is less than 3.0, continue to add aluminum hydroxide sludge , If it is higher than 3.0, iron-containing waste acid can be added. After reaching the PH value of 3.0, the material is discharged. The supernatant of the liqu...
Embodiment 2
[0017] The present invention uses the aluminum hydroxide sludge produced in the production of aluminum materials to produce a liquid composite aluminum-iron water purifier using the following process steps:
[0018] In the present invention, 35% by weight of iron-containing waste acid solution (waste iron-containing sulfuric acid, acid content> 8%) is added to the reaction tank, and 65% by weight of aluminum hydroxide sludge is gradually added. The sludge completely reacts and dissolves to gradually generate a liquid composite aluminum-iron water purifier. Use a precision pH test paper of 0 to 5 to detect the pH value to control the pH value at 2.5. If the pH value is less than 2.5, continue to add aluminum hydroxide sludge , If it is higher than 2.5, you can add iron-containing waste acid. Discharge after reaching the PH value of 2.5. After the liquid composite aluminum-iron water purifier is naturally precipitated, the supernatant is the finished product of the liquid composite ...
Embodiment 3
[0020] The present invention uses the aluminum hydroxide sludge produced in the production of aluminum materials to produce a liquid composite aluminum-iron water purifier using the following process steps:
[0021] In the present invention, 15% by weight of iron-containing waste acid (waste iron-containing hydrochloric acid, acid content> 8%) is added to the reaction tank, and 84% by weight of aluminum hydroxide sludge is gradually added, and the reaction is stirred at room temperature to make the aluminum hydroxide sludge Completely react and dissolve, and gradually generate a liquid composite aluminum-iron water purifier. Adding a small amount of additives is 0.1% by weight of defoamer, and the amount depends on the degree of foaming during the reaction. Use a precision pH test paper of 0 to 5 to detect the pH value and control the pH value at 2.8. If the pH value is less than 2.8, you can continue to add aluminum hydroxide sludge. If it is higher than 2.8, you can add iron-con...
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