Claims
- 1. A method of coagulation of the minute mineral particles in suspension, which comprises adding a coagulant comprising a copolymer of 0.5 to 10 mol % of 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, 40 to 99.5 mol % of N-hydroxymethylacrylamide and 20.3 to 59.5 mol % of acrylamide and showing a reduced viscosity of 10 to 30 dl/g in an aqueous 1N solution of sodium chloride at a temperature of 25.degree. C. and a concentration of 0.1 g/dl therein, into a netural waste water containing the minute mineral particles in a suspended state therein.
- 2. A method according to claim 1, wherein said coagulant comprises a copolymer of 0.5 to 10 mol % of 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, 45 to 99.5 mol % of N-hydroxymethylacrylamide and 0 to 54.5 mol % of acrylamide.
- 3. A method according to claim 1, wherein said neutral waste water containing the minute mineral particles in a suspension is the waste water discharged when the mined mineral ore is treated.
- 4. A method according to claim 3, wherein said waste water is a waste water from phosphorous ore treating, a tailing waste water from copper ore treating and a waste water from aggregates washing.
- 5. A method according to claim 1 or 2, wherein the amount of addition of said coagulant is 5 to 500 g per ton of the minute mineral particles in said waste water.
Priority Claims (1)
Number |
Date |
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60-38593 |
Feb 1985 |
JPX |
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Parent Case Info
This application is a continuation of U.S. Ser. No. 833,131, filed Feb. 24, 1986, now abandoned, the contents of which are hereby incorporated by reference into the present application.
US Referenced Citations (11)
Continuations (1)
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Number |
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Parent |
833131 |
Feb 1986 |
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