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Permanent heavy metal waste curing method

A solidification method and waste technology, applied in the field of environmental engineering, can solve the secondary pollution of the surrounding environment, resource waste, uneconomical and other problems, and achieve the effects of solving pollution problems, accelerating utilization, and improving production efficiency

Inactive Publication Date: 2015-12-09
肖德意
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many shortcomings in the landfill method, such as serious waste of resources, need to occupy a large amount of land area, and cause secondary pollution to the surrounding environment. At the same time, this method is very uneconomical. The anti-seepage layer, covering clay, planting trees, etc. all require a large amount of capital investment, but there is no output if there is too much investment
The cement brick method refers to mixing heavy metal waste pollutants into cement mortar bricks according to the ratio, but this method also has the following disadvantages: the surface of cement mortar bricks is rough, the surface is difficult to coat with paint, and the surface is easy to leak heavy metal trace elements. The parameters of heavy metal waste in the environment are limited, and it is difficult to deal with large quantities of heavy metal waste pollutants
As for the sintering method, it refers to making heavy metal waste sludge or clay into clay bricks and sintering them into bricks to achieve the purpose of solidifying heavy metal waste pollutants. However, the production of sintered bricks requires high energy consumption. At this time, the quality of fired bricks is difficult to guarantee, and the scope of use of fired bricks is limited, and the small amount makes the amount of heavy metal waste pollutants treated limited.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: The manufacturing process of the additional product tile by the permanent solidification method of heavy metal waste

[0035] ①Materials: 30% of heavy metal waste, 8% of reinforced fiber, 20% of quicklime, 10% of gypsum, 30% of quartz powder, 1% of additive, and 1% of glass fiber; the fineness of quartz powder is about 200 mesh, and the fineness of heavy metal waste The density is about 80-200 mesh; the above materials can be mixed evenly by mixing equipment and then mixed with water to make pulp, or computer pulping can be used; this embodiment uses computer pulping;

[0036] ②Computerized pulping: use pipeline pumping, screw conveying, belt scales, electronic flow meters, weighing sensors, etc. to automatically pulp the above materials according to the mass ratio, and the pulping concentration is 45%;

[0037] ③Combining into billets: three 180 long tile billets can be produced at one time by using a forming cylinder with a diameter of 1650 mm;

[0038]...

Embodiment 2

[0047] Embodiment 2: The manufacturing process of the additional product board of the heavy metal waste permanent solidification method

[0048] ①Material ratio: 30% of heavy metal waste pollutants, 20% of quicklime, 10% of gypsum, 30% of quartz powder, 8% of reinforcing fiber, and 2% of additives; the above materials can be mixed evenly by mixing equipment and then mixed with water Pulping can also adopt computerized pulping; this embodiment adopts computerized pulping;

[0049] ②Computer pulping: use pipeline pumping, screw conveying, belt scales, electronic flow meters, weighing sensors, etc. to realize automatic pulping, and the pulping concentration is 45%;

[0050] ③Cutting into billets: Two 2.44-meter-long slabs can be produced at one time by using a forming cylinder with a diameter of 1650 mm;

[0051] ④Vacuum stacking: use a three-station vacuum stacker to realize one board and one mold stacking;

[0052] ⑤ Pressing: Use 14,000 tons of presses to realize the process...

Embodiment example 3

[0061] Implementation Case 3: Manufacturing process of additional product pipe for permanent solidification of heavy metal waste

[0062] ①Materials: 30% of heavy metal waste pollutants, 20% of quicklime, 10% of gypsum, 30% of quartz sand, 8% of reinforcing fibers, and 2% of additives;

[0063] ②Computer pulping: use pipeline pumping, screw conveying, belt scales, electronic flow meters, weighing sensors, etc. to realize automatic pulping, and the pulping concentration is 45%;

[0064] ③Combining and making pipe: use the pipe-taking machine to make a pipe with a diameter of 1 meter, a length of 4 meters and a thickness of 50 mm;

[0065] ④Demoulding: automatic demoulding by electric tube remover;

[0066] ⑤ Pre-curing: static stop maintenance;

[0067] ⑥Steaming: Use a steaming kettle to steam, the temperature of steaming is 197 degrees, and the pressure is 1.3Mp;

[0068] ⑦Stacking pipes: use special cranes or other transportation tools to realize automatic stacking pipes;...

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Abstract

According to the present invention, powder-like or slurry-like heavy metal waste, quick lime, gypsum powder, quartz powder or porcelain clay, fibers and an additive are matched according to a certain ratio, the heavy metal waste is directly used as the reference material and is permanently cured in the Tobermorite crystal through the stable structure Tobermorite crystal, the extrusion method is used to produce so as to substantially improve the production efficiency, a plurality of the irregularly shaped structures can be produced, the utilization of the heavy metal waste is accelerated, and the important significance is provided for the national treatment of heavy metal pollution; material matching, slurry preparing, black preparing molding and steam curing are performed so as to finally form the Tobermorite crystal wrapping the heavy metal waste particles; and with the production method, the permanent heavy metal waste curing purpose can be achieved only requiring 1-2 day, such that the production period is substantially shortened, and the treatment capacity on the heavy metal waste is increased so as to achieve the purpose of the present invention.

Description

(1) Technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to a method for permanently solidifying heavy metal waste. (2) Background technology [0002] At present, heavy metal waste and waste water are seriously endangering the natural environment of our country. Heavy metal pollution has seriously affected people's production environment. The solution to the problem of heavy metal pollution is an urgent problem, but domestic and foreign solutions to heavy metal waste pollutants are commonly used There are three methods: landfill method, cement brick method, and sintering method; some of these methods are a waste of resources, or have high economic costs, which are not conducive to promotion. The landfill method refers to digging a foundation pit for landfill, making an anti-seepage layer at the bottom of the pit, then filling the pit with heavy metal waste pollutants, covering it with clay, and then planting trees on t...

Claims

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Application Information

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IPC IPC(8): C04B28/18C04B28/14C04B18/04
CPCY02W30/91
Inventor 肖德意
Owner 肖德意
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