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A kind of cyanamide waste residue flotation separation method enhanced by hydraulic cavitation

A technology of hydraulic cavitation and separation method, which is applied in flotation, solid separation, etc., can solve the problems of low efficiency and achieve the effect of improving the effect and effective flotation separation

Active Publication Date: 2022-06-03
NINGXIA JIAFENG CHEMICALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calcium carbonate and graphite carbon in the cyanamide waste residue are wrapped with each other, and the direct flotation separation is very inefficient, so it is necessary to find an efficient separation method

Method used

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  • A kind of cyanamide waste residue flotation separation method enhanced by hydraulic cavitation

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Effect test

Embodiment 1

[0028] A cyanamide waste residue flotation separation method enhanced by hydraulic cavitation, the specific steps are: 1) weigh a certain amount of cyanamide waste residue and put it into a stirring tank and add water, wherein the mass ratio of water to cyanamide waste residue is 2:1 , stirring and mixing for 1min; 2) After mixing, add collector diesel oil 30L / t, stir for 1min, add surfactant isooctanol 1L / t, stir for 1min; 3) Pump into the aperture at a flow rate of 500L / h The orifice plate is 0.1mm and the number of openings is 5. The two ends of the orifice plate are connected to the pipeline through flanges, maintaining the cavitation pressure of 0.5Mpa, the system temperature of 20°C, and the initial cavitation; 4) Slurry after cavitation Continue to feed into the cavitation element, repeat the cavitation operation 4 times, and obtain the slurry after circulating cavitation; 5) collect the slurry after circulating cavitation, stir evenly, and carry out 1-stage flotation. ...

Embodiment 2

[0030] A cyanamide waste residue flotation separation method enhanced by hydraulic cavitation, the concrete steps are: 1) weigh a certain amount of cyanamide waste residue and put it into a stirring tank and add water, wherein the dewatering and cyanamide waste residue mass ratio is 2: 1. Stir and mix for 3 minutes; 2) After mixing, add 50L / t of collector diesel oil, stir for 3 minutes, add 2.5L / t of surfactant isooctyl alcohol, and stir for 3 minutes; 3) Use a pump to pump at a flow rate of 800L / h An orifice plate with an entrance diameter of 5mm and a number of openings of 10. The two ends of the orifice plate are connected to the pipeline through flanges, maintaining a cavitation pressure of 3Mpa, a system temperature of 30°C, and initial cavitation; 4) Slurry after cavitation Continue to feed into the cavitation element, repeat the cavitation operation 9 times, and obtain the slurry after circulating cavitation; 5) collect the slurry after circulating cavitation, stir evenl...

Embodiment 3

[0032] like figure 1 As shown, a kind of cyanamide waste residue flotation separation method enhanced by hydraulic cavitation, the concrete steps are: 1) weigh a certain amount of cyanamide waste residue and put it into a stirring tank and add water, wherein, the mass ratio of water and cyanamide waste residue is 2:1, stirring and mixing for 8min; 2) After mixing, add collector diesel oil 70L / t, stir for 8min, add surfactant isooctanol 4L / t, stir for 8min; 4) Use a pump with a flow rate of 1500L / h The orifice plate with a diameter of 10 mm and a number of openings of 20 is fed into the orifice plate. The two ends of the orifice plate are connected to the pipeline through flanges, the cavitation pressure is maintained at 6Mpa, the system temperature is 40°C, and the initial cavitation is performed; 4) Slurry after cavitation The material continues to pass into the cavitation element, and the cavitation operation is repeated 9 times to obtain the slurry after circulating cavitat...

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Abstract

The invention discloses a flotation separation method for cyanamide waste slag strengthened by hydraulic cavitation. The specific steps are as follows: firstly, cyanamide waste slag is mixed with dewatered water, and slurry is prepared to obtain slurry; active agent; by using a pump to send the slurry into the cavitation element at a certain flow rate, maintain a certain cavitation pressure, and maintain a certain system temperature during the cavitation process to obtain a primary cavitation slurry; then the primary cavitation The condensed slurry continues to pass into the cavitation element, and the cavitation operation is repeated several times to obtain the slurry after the cavitation cycle; finally, the slurry after the cavitation cycle is collected, and the slurry is stirred evenly before flotation. The hydraulic cavitation-intensified cyanamide waste slag flotation separation method proposed by the invention has the advantages of simple process flow, simple medicament system, convenient operation, low cost and good industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of solid waste separation, in particular to a method for flotation separation of cyanamide waste residues enhanced by hydraulic cavitation. Background technique [0002] Cyanamide waste residue is an industrial waste residue produced in the production process of dicyandiamide. The wet base waste residue of cyanamide is black, and the dry base waste residue is gray-white and has a pungent odor. Its main components are calcium carbonate and graphite carbon. According to statistics, for every 1 ton of dicyandiamide produced, 5 tons of cyanamide waste will be produced. my country's dicyandiamide production accounts for more than 80% of the world's total, and the annual output reaches 1 million tons. Therefore, about 5 million tons of waste residues are produced every year. At present, the main treatment method of cyanamide waste residue is accumulation and burial, which will cause serious environmental pollutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/004B03D101/02
CPCB03D1/004B03D2201/02
Inventor 张智亮李扬计建炳石广伟谢皓顾海宝
Owner NINGXIA JIAFENG CHEMICALS CO LTD
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