Preparation method for sludge baked brick resisting leaching of heavy metal

The invention relates to a preparation method for a sludge baked brick resisting leaching of heavy metal. The preparation method includes the steps as follows: (1) adding boric acid in water glass and stirring to obtain sodium borosilicate ternary sol original solution; and then adding water for mix...

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Bibliographische Detailangaben
Hauptverfasser:	WANG XIAOSHAN, SHAN JIANGLONG, YUAN YANLIANG, PAO LINGYAN, SHI WEIPING, LI LUBAO, YUAN HUA, TU HAOCHI, WANG ZHIYU
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF NATURAL STONE TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	The invention relates to a preparation method for a sludge baked brick resisting leaching of heavy metal. The preparation method includes the steps as follows: (1) adding boric acid in water glass and stirring to obtain sodium borosilicate ternary sol original solution; and then adding water for mixture to obtain sodium borosilicate ternary sol diluted solution; (2) adding the diluted solution in sludge, wherein the added diluted solution accounts for 8%-15% sludge in quantity, stirring, and standing for 12-24 hours; and (3) baking according to conventional flow, so that the sludge baked brick can be obtained. The preparation method is simple, convenient and feasible, and suitable for industrial production; and in the treated sludge baked brick, the leaching of chromium is lowered by 40% minimally and the leaching of arsenic is lowered by 60% minimally.