Harmless treatment method for casting dust-removing ash

A technology of harmless treatment and treatment method, which is applied in the field of solid waste treatment and environmental protection regeneration, can solve the problems of natural gas consumption, achieve energy saving, wide application range, and reduce the consumption of natural gas

Active Publication Date: 2019-01-25
HEFEI RENCHUANG CASTING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, thermal regeneration will consume a large amount of natural g

Method used

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  • Harmless treatment method for casting dust-removing ash
  • Harmless treatment method for casting dust-removing ash
  • Harmless treatment method for casting dust-removing ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a harmless treatment method and application of foundry dust removal. The specific treatment method includes the following steps:

[0030] (1) adopt magnetic separation device to remove the metal powder in the dedusting ash, obtain the dedusting ash after purification;

[0031] (2) Mix and roast the purified dedusting ash obtained in step (1) and granular foundry waste sand, the dedusting ash accounts for 5% of the weight of the foundry waste sand, and roast at 500° C. for 3 hours in a roasting furnace;

[0032] (3) After the roasting is completed, the regenerated sand and the processed dedusting ash are obtained, and the dedusting ash mixed in the regenerated sand is separated by negative pressure induced wind, and the dedusting ash is collected with a dedusting cloth bag;

[0033] (4) Portland cement and clear water are added to step (3) gained dedusting ash, the Portland cement add-on is 10% of the dedusting ash weight after the described trea...

Embodiment 2

[0035] This embodiment provides a harmless treatment method and application of foundry dust removal. The specific treatment method includes the following steps:

[0036] (1) adopt magnetic separation device to remove the metal powder in the dedusting ash, obtain the dedusting ash after purification;

[0037] (2) Mix and roast the purified dedusting ash obtained in step (1) and granular foundry waste sand, the dedusting ash is 15% of the weight of the foundry waste sand, and roast at 700° C. for 8 hours in a roasting furnace;

[0038] (3) After the roasting is completed, the regenerated sand and the processed dedusting ash are obtained, and the dedusting ash mixed in the regenerated sand is separated by negative pressure induced wind, and the dedusting ash is collected with a dedusting cloth bag;

[0039] (4) Portland cement and clear water are added to step (3) gained dedusting ash, the Portland cement add-on is 40% of the dedusting ash weight after the described treatment, an...

Embodiment 3

[0041] This embodiment provides a harmless treatment method and application of foundry dust removal. The specific treatment method includes the following steps:

[0042] (1) adopt magnetic separation device to remove the metal powder in the dedusting ash, obtain the dedusting ash after purification;

[0043] (2) Mix and roast the dedusting ash obtained in step (1) and granular foundry waste sand, the dedusting ash is 10% of the weight of the foundry waste sand, and roast at 600° C. for 5 hours in a roasting furnace;

[0044] (3) After the roasting is completed, the regenerated sand and the processed dedusting ash are obtained, and the dedusting ash mixed in the regenerated sand is separated by negative pressure induced wind, and the dedusting ash is collected with a dedusting cloth bag;

[0045] (4) Portland cement and clear water are added to step (3) gained dedusting ash, the Portland cement add-on is 30% of the dedusting ash weight after the described treatment, and the wat...

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Abstract

The invention relates to a harmless treatment method for casting dust-removing ash. The harmless treatment method for the casting dust-removing ash is combined with a casting waste sand thermal-process regeneration technology, and the dust-removing ash with heat value is added into waste sand and is roasted to release heat; the waste sand is regenerated and the harmless treatment on the dust-removing ash is also realized. The method comprises the following steps: firstly, removing metal powder in the dust-removing ash; mixing and roasting the purified dust-removing ash and the casting waste sand; after finishing roasting, collecting the dust-removing ash at a mechanical regeneration phase of regenerated sand; adding portland cement, a water reducing agent, dispersible adhesive powder, woodfibers and clean water into the recollected dust-removing ash; uniformly stirring to form an ash material and granulating. By adopting the harmless treatment method for the casting dust-removing ash,provided by the invention, the waste sand can be subjected to regeneration treatment and the harmless treatment on the dust-removing ash is also realized; the consumption of natural gas is reduced and efficient and low-consumption treatment of the dust-removing ash is realized; zero emission is realized and environment pollution is avoided.

Description

technical field [0001] The invention belongs to the fields of solid waste treatment and environmental protection regeneration, and in particular relates to a harmless treatment method for casting dust removal. Background technique [0002] Waste sand and powdery solid waste dedusting are produced in the casting production process. The substances contained in the dust include coal powder, bentonite, paint, resin binder, metal oxide, silica powder, etc. After chemical composition analysis, this kind of dust is mainly composed of silicon aluminum, calcium, magnesium and iron. oxides and a small amount of sodium and potassium. Researchers have proved that the metal pollutants in the dust can inhibit the activity of microorganisms in the soil, randomly piled up to occupy land resources, and destroy the ecological environment. [0003] The current technology lacks effective treatment measures for dust removal, and most of them are stacked in the open air, buried or granulated. ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/04
CPCC04B20/04C04B28/04C04B2201/20C04B18/062C04B18/0427C04B18/26C04B2103/302
Inventor 尹海军胡文志包羽冲李卓情冯俊龙
Owner HEFEI RENCHUANG CASTING MATERIAL CO LTD
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