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Method for making shale bricks with calcium fluoride sludge and treatment method of fluorine-containing wastewater

A calcium fluoride, shale brick technology, applied in water/sludge/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., to achieve the effects of good stability and high disposal cost

Inactive Publication Date: 2017-02-01
长沙聚优能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is, in order to solve the problem of solid waste disposal of fluorine-containing waste water, carry out resource recycling, make shale bricks as raw materials, convert pollutants into products through certain batching and series processes, and after the products are sold and utilized, It not only brings social and economic value, but also solves the problem of environmental pollution. At the same time, it expands the scope of raw material sources for shale bricks, and improves the environmental friendliness and economy of shale brick production.

Method used

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  • Method for making shale bricks with calcium fluoride sludge and treatment method of fluorine-containing wastewater

Examples

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Effect test

Embodiment 1

[0025] A treatment method for making shale bricks from calcium fluoride sludge used in the treatment of fluorine-containing wastewater. The calcium fluoride wet sludge produced by the method in the treatment of fluoride-containing wastewater has a moisture content of 98%. After dehydration by pressure filtration, Keep the water content at 80%; use microwave method to reduce the water content to less than 40% for stable immobilization, and then mix with shale to form particles smaller than 0.25mm, accounting for more than 80%, 0.25 ~ 0.5mm The mixed dry powder whose particles account for less than 20% is mixed with fly ash at the same time. The volume ratio area is: fly ash is between 4:1 and 4:2, mixed with 20% water, and then stacked and aged for 12h-36h, squeezed The green bricks are pressed, and the green bricks are dried and fired at high temperature into shale brick products. During the firing process, the volume ratio of green bricks to coal (combination of coal slime and...

Embodiment 2

[0027] As described in Example 1, the calcium fluoride sludge disposal of a certain photovoltaic enterprise containing wastewater treatment is transformed, and the fluorine-containing wastewater treatment produces about 100m3 per day. 3 / d, the calcium fluoride sludge with a water content of 98%, after dehydration by pressure filtration, it becomes a 52T mud cake with a water content of 60%. The original disposal method is to dry the sludge and store it in bags, because the landfill refuses to accept fluorine-containing sludge. Due to long-term accumulation and gradual full storage, there is increasing pressure on the disposal of calcium fluoride sludge for fluorine-containing wastewater treatment. Considering that production will eventually be affected, the company has adopted various methods for disposal, but the effect is not obvious Or the cost is high. After being transformed by the invention, the calcium fluoride sludge is well disposed, and the bricks made of the calci...

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Abstract

The invention discloses a method for making shale bricks with calcium fluoride sludge and a treatment method of fluorine-containing wastewater. The method for making the shale bricks with the calcium fluoride sludge includes the steps that the calcium fluoride sludge with the water content of 60% or below is mixed with shale, the mixture is smashed and ground into mixed dry powder with the particle size smaller than 0.5 mm, and coal ash is added; water is added for mixing, stacking aging is carried out, extrusion green brick making is carried out, and green bricks are dried and then fired into the shale bricks, wherein the volume ratio of the mixed dry powder to the coal ash is 4:1-4:2. By means of the new method for treating the calcium fluoride sludge and the fluorine-containing wastewater, waste recycling is achieved, and the performance of the fired shale bricks is greatly improved.

Description

technical field [0001] The invention relates to a method for making shale bricks from calcium fluoride sludge and a treatment method for fluorine-containing wastewater, and belongs to the field of resource utilization of fluorine-containing wastewater and calcium fluoride sludge. Background technique [0002] With the continuous expansion of my country's industrial production, a large amount of fluorine-containing sludge produced in industrial production exists, which poses a huge threat to the environment of our country. These fluorine-containing sludge pollute the soil, groundwater, and surface water in the environment, and then pass through the food ecological chain, causing various diseases to the human body. Therefore, my country is gradually promulgating and gradually implementing more stringent requirements for calcium fluoride sludge disposal. At present, there is no method for making shale bricks from calcium fluoride sludge. Contents of the invention [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C04B33/02C02F1/00C02F101/14
CPCC02F1/00C02F2101/14C04B33/04C04B33/1321C04B33/1352C04B2235/96Y02P40/60
Inventor 叶凌王合德蓝文辉
Owner 长沙聚优能环保科技有限公司