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Reclamation equipment for waste water and liquid generated by removing ceramic cores of precision castings through strong alkali corrosion

A ceramic core, alkali corrosion technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. To achieve the effect of protecting land and environmental resources, avoiding human and animal poisoning, and avoiding human and animal harm

Inactive Publication Date: 2015-10-21
贵州大东风机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant literature shows that the above-mentioned waste water and waste liquid are highly alkaline, rich in sodium and potassium hydroxide, and contain a certain amount of radioactive elements such as uranium, vanadium, and hafnium. The harmful liquid has complex components and different structures. If it is not recovered in time Disposal and discharge as industrial waste will cause harm to people and livestock, endanger life and property safety, and cause great damage to water, land resources and the environment

Method used

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  • Reclamation equipment for waste water and liquid generated by removing ceramic cores of precision castings through strong alkali corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The regeneration of the chemical waste liquid of the precision casting ceramic core by strong alkali corrosion method is as follows: 1) Sprinkle the prepared acidic reagent into the chemical waste liquid in the pool 1 to be treated, open the ball valve A4 and close the ball valve B5, and make the waiting The treatment pool 1 is fed with compressed air 7 for stirring and filtered through the filter screen 6, and added while stirring; 2) After the addition of the acidic reagent is completed, continue to feed the compressed air 7 and stir for 2 hours; 3) Close the ball valve A1 and wait for the chemical waste liquid to Stand still for 6-8 hours; 4) Open the ball valve B5, so that the regenerated and filtered lye flows into the clean pool 2.

[0016] The acidic reagent can be oxalic acid, industrial sulfuric acid or industrial hydrochloric acid.

[0017] The concentration of the acidic reagent is 0.1-0.8% of the chemical waste liquid, and it is configured according to the n...

Embodiment 2

[0020] The strong alkali corrosion method removes the regeneration of the ceramic core cleaning casting waste water, and the operation steps are as follows: 1) Sprinkle the prepared acidic reagent into the waste water in the waiting pool 1, open the ball valve A4 and close the ball valve B5, and let the waiting pool 1 pass into The compressed air 7 is stirred and filtered through the filter screen 6, and added while stirring; 2) After the acidic reagent is added, continue to feed the compressed air 7 and stir for 2 hours; 3) Close the ball valve A1, and wait for the waste water to stand for 6-8 hours; 4) Open the ball valve B5 to allow the regenerated and filtered clean water or lye to flow into the clean pool 2.

[0021] The acidic reagent can be oxalic acid, industrial sulfuric acid or industrial hydrochloric acid.

[0022] The concentration of the acidic reagent is 0.1-0.8% of the chemical waste liquid, and it is configured according to the needs of the application.

[002...

Embodiment 3

[0025] The strong alkali corrosion method removes the regeneration of the ceramic slurry of the precision casting ceramic core. The operation steps are as follows: 1) Add 1-3 times of clear water according to the amount of ceramic slurry, and perform mechanical stirring at a stirring speed of 60-80 rpm. The stirring time is 1-3 hours; 2) Check the pH value of the mud stirring liquid, if the pH value is ≥ 9, continue to add water and stir; if the pH value is < 9, stop adding water and stirring; 3) Drain the mud stirring liquid and heat up the sediment Bake at 900°C, keep warm at 900°C for 2 hours, and then cool naturally as a refractory material; 4) Sprinkle the prepared acidic reagent into the mud stirring liquid in the pool 1 to be treated, open the ball valve A4 and close the ball valve B5, the pool 1 to be treated is fed into the compressed air 7 for stirring and filtered through the filter screen 6, and added while stirring; 5) after the addition of the acidic reagent is co...

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Abstract

Reclamation equipment for waste water and liquid generated by removing ceramic cores of precision castings through strong alkali corrosion comprises a to-be-processed tank, a cleaning tank, a filter screen, a pipeline, a ball valve A and a ball valve B, wherein the to-be-processed tank and the cleaning tank are connected through the pipeline; the ball valve A is mounted on the pipeline and is close to the to-be-processed tank, and the ball valve B is mounted on the pipeline and is close to the cleaning tank; the ball valve A is connected with compressed air; the filter screen is located in the to-be-processed tank and connected with the pipeline. The reclamation equipment is characterized in that the position of the to-be-processed tank is higher than that of the cleaning tank, and the filter screen is inverted in the to-be-processed tank. The reclamation equipment has the benefits that waste water and liquid and ceramic slurry in the to-be-processed tank are subjected to solid-liquid separation, clear water or alkali liquor, which can be used after being regenerated, is placed into the cleaning tank through the pipeline, and solid sediments are filtered by the filter screen and kept in the to-be-processed tank, so that reutilization of waste water, waste liquid and ceramic slurry generated by removing ceramic cores through strong alkali corrosion is realized, accordingly, the water-land resource environment is protected against pollution, people and livestock are prevented from being poisoned, and zero emission of waste water and liquid is achieved.

Description

technical field [0001] The invention relates to the field of regeneration and utilization of ceramic core-removing waste water and waste liquid, in particular to a waste water and waste liquid regeneration device for removing ceramic cores of precision castings by a strong alkali corrosion method. Background technique [0002] The ceramic core is an adapter used to form the inner cavity structure of the precision casting in the investment casting process. Together with the outer mold and the mold shell, the dimensional accuracy of the cavity of the precision casting is guaranteed, and it is suitable for precision castings with complex shapes or difficult to form. The cavity is a special process method that can simplify the process difficulty, reduce the cost and improve the qualified rate of the product. [0003] At present, strong alkali corrosion is usually used to remove the core of precision casting ceramic cores, such as atmospheric pressure molten alkali boiling method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 钟行佳钟闻建黄昌辉翟雄波高微
Owner 贵州大东风机械有限公司