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Method of treating asbestos-containing waste material

A treatment method and technology for asbestos, applied in the direction of solid waste removal, etc., can solve the problems of inability to prevent asbestos scattering or discharge, human health impact, asbestos scattering and discharge, etc., and achieve the effect of promoting effective reuse and promoting effective utilization.

Inactive Publication Date: 2009-09-09
SUMITOMO OSAKA CEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, when asbestos-containing waste is supplied to melting furnaces or cement kilns, it is impossible to prevent the scattering or discharge of asbestos
Also, in the above conventional methods, as pretreatment, in order to pulverize, decompose, or form fine fragments, etc., the asbestos-containing waste materials must be destroyed by using heavy machinery, etc., and mainly mechanical devices must be used. As a result, Asbestos will be scattered and emitted, and the problem of the impact on human health in the process of supplying to melting furnaces or cement kilns has not been fully resolved

Method used

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  • Method of treating asbestos-containing waste material
  • Method of treating asbestos-containing waste material

Examples

Experimental program
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Effect test

example 1

[0148] In 95 parts of 10% hydrochloric acid (manufactured by Kanto Chemical Co., Ltd.: 35% hydrochloric acid diluted) aqueous solution, 5 parts of aqueous solution of ammonium fluoride (manufactured by Kanto Chemical Co., Ltd.) (hydrogen ion concentration: 2.81mol / L·pH Value=-0.45, fluoride ion concentration: in 27000mg / L=1.4mol / L · 2.9%), each asbestos standard sample (by (company) Japan The standard sample obtained by the Work Environment Measurement Association) was dissolved at 40°C for 3 hours, and the residual rate of each asbestos was measured by the above-mentioned quantitative analysis method, and it was not more than the above-mentioned lower limit of quantification.

example 2

[0150] Cement-based slabs (corrugated materials) containing 3.4% chrysotile, 36.2% amosite, and 8.1% crocidolite were coarsely crushed using iron tongs in a small toolbox with a HEPA filter ( The maximum particle diameter is approximately 1 to 2 cm), and pulverization was carried out in a sealed state using an analytical mill manufactured by IKA Corporation.

[0151] In 95 parts of 10% hydrochloric acid (manufactured by Kanto Chemical Co., Ltd.: 35% hydrochloric acid diluted) aqueous solution, 5 parts of aqueous solution of ammonium fluoride (manufactured by Kanto Chemical Co., Ltd.) (hydrogen ion concentration: 2.81mol / L·pH value=-0.45, fluoride ion concentration: 27000mg / L=1.4mol / L·2.9%), impregnating 20 parts of the above-mentioned pulverized cement board (corrugated material) and dissolving at 40° C. for 3 hours, the residual rate of each asbestos is It was measured by the above-mentioned quantitative analysis method, and it was not more than the above-mentioned lower limi...

example 3

[0153] In 95 parts of 10% hydrochloric acid (manufactured by Kanto Chemical Co., Ltd.: 35% hydrochloric acid diluted) aqueous solution, 5 parts of 46% aqueous solution of hydrofluoric acid (manufactured by Kanto Chemical Co., Ltd.) (hydrogen ion concentration: 2.81mol / L pH value=-0.45, fluoride ion concentration: 23000mg / L=1.4mol / L·2.4%), each asbestos standard sample (by (company) of chrysotile, amosite, crocidolite that impregnates 20 parts respectively ) standard sample obtained by the Japan Working Environment Measurement Association) was dissolved at 40° C. for 3 hours, and the residual rate of each asbestos was measured by the above-mentioned quantitative analysis method, and it was not more than the above-mentioned lower limit of quantification.

[0154] It is preferable to add an alkali to neutralize the asbestos-containing waste material after performing the asbestos-free treatment by the above-mentioned acid treatment to form a precipitate.

[0155] Specifically, asb...

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Abstract

The invention provides a method of asbestos treatment in which an asbestos-containing waste material of arbitrary configuration can be detoxified completely and safely. The method of asbestos treatment comprises impregnating an asbestos-containing waste material with an acid so as to cause at least the asbestos at the surface of the waste material to be nonasbestous and further treating the treatment product in a cement production plant. In particular, the treatment in a cement production plant is a fusion treatment by means of a cement kiln. Therefore, not only can the asbestos-containing waste material be detoxified completely and safely but also a cement reusing the waste material can be produced.

Description

technical field [0001] The present invention relates to a method for processing asbestos-containing waste materials, in particular, to a method for processing asbestos-containing waste materials that can completely and safely process asbestos-containing waste materials. Background technique [0002] In the past, asbestos did not lose strength over a long period of time, and was excellent in fire resistance, so it has been widely used in various fields, such as corrugated boards, water pipes, refractory covering materials, brakes, etc. Gaskets, sealing gaskets, insulation boards, ropes, fillers, filling materials for acetylene gas cylinders, etc. involve many components in various fields. [0003] However, in recent years, it has been proved that asbestos is the cause of many health damages such as asbestosis, lung cancer, malignant mesothelioma, etc., so its use has been banned. [0004] In particular, asbestos-containing members are often used as corrugated plate members, ...

Claims

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Application Information

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IPC IPC(8): B09B3/00A62D3/40A62D3/36A62D101/41
Inventor 榊原弘幸若杉三纪夫兼先泰道松田隆金井谦介
Owner SUMITOMO OSAKA CEMENT CO LTD