Method for preparing mineral processing agent by using stirring mill and base coupling

Abstract

The invention discloses a method for preparing a mineral processing agent by using a stirring mill and base coupling, and belongs to the field of resource utilization of municipal sludge. The stirringmill and alkali coupling are adopted to crush residual sludge, centrifugal filtration is performed on the crushed sludge, and causticizing and concentrating are performed so as to obtain a product which is adopted as a flotation agent; a rotary ball milling method is adopted to break walls, on the one hand, a huge fluid shearing force, instantaneous high pressure and an instantaneous impact forcegenerated during operation of a mechanical device are utilized to break the cell walls of every individual bacterium and zoogloea in the residual sludge so as to force organic matter in the cells toflow out and obtain a high wall-breaking rate of the sludge; on the other hand, the technology has low production cost and stable operation, so that the industrial production of the technology is facilitated; through addition of a part of base during the ball milling, on the one hand, the wall-breaking effect of the sludge is increased further through the ball-milling function so that the averagewall-breaking rate of the sludge in the technology can reach 80% or above, on the other hand, the addition amount of base in the subsequent causticizing process can be reduced, so that the operation cost is reduced.

Description

Technical field [0001] The invention belongs to the field of municipal sludge resource utilization, and specifically relates to a method for preparing a beneficiation agent by coupling a stirring mill and an alkali. Background technique [0002] At present, the main sewage treatment methods at home and abroad are: activated sludge method, biofilm method, oxidation method, biological activated carbon technology, etc. The activated sludge method accounts for the total sewage treatment volume due to its high processing capacity and good effluent quality. More than 90. However, the activated sludge method produces a large amount of excess sludge due to the proliferation of microorganisms. This sludge poses a great threat to the environment and at the same time has become a heavy burden on the sewage treatment plant. The sludge of the sewage treatment plant has a high water content (95% to 99%), and its dehydration and treatment costs are also high. The cost of sludge treatment has ...

AI Technical Summary

Problems solved by technology

At present, the sludge cracking technology mainly includes: mechanical method (rotary ball milling method, high-pressure homogenizer method, mechanical jet crushing technology, high-efficiency pulse technology and centrifugal lysis technology, etc.), ultrasonic method, heat treatment method, microwave method, freezing method, radiation, etc. method, ozone method, acid-base method, etc. However, these methods have a good cracking effect on sludge, but generally have the problem of high operating costs