Metallurgical solid waste gel material and preparation method thereof

By using specific ratios of slag ultrafine powder, construction gypsum powder, stainless steel slag powder, fly ash and coking desulfurization ash in metallurgical solid waste gelling materials, the problem of not adapting to different application scenarios is solved, and the early strength improvement of the material and the satisfaction of environmental protection standards are achieved.

CN119707329APending Publication Date: 2025-03-28BAOWU HUANKE SHANXI RESOURCE RECYCLING CO LTD
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Patent Information

Application Number
CN202411890654.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing metallurgical solid waste gelling materials have problems in the setting time of inadequate to different application scenarios, and the utilization rate of steel slag and stainless steel slag is low, and there is a risk of stability and heavy metal dissolution exceeding the standard.

Method used

The ratio of 40-60% slag ultrafine powder, 5-15% construction gypsum powder, 5-20% stainless steel slag powder, 5-10% fly ash and 1-8% coking desulfurization ash is adjusted through ball milling and screening treatment.

Benefits of technology

The early compressive strength and flexural strength of gelled materials have been improved, which meets the construction time requirements of different scenarios, reduces the content of water-soluble hexavalent chromium, meets environmental protection standards, and improves the utilization rate of solid waste.

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Abstract

The invention discloses a metallurgical solid waste gel material which comprises the following components in percentage by mass: 40-60% of superfine slag powder, 5-15% of building gypsum powder, 5-20% of stainless steel slag powder, 5-10% of fly ash and 1-8% of coking desulfurization ash, the superfine slag powder is prepared by conveying blast furnace water-quenched slag generated by ironmaking into a storage tank through a belt and then grinding the blast furnace water-quenched slag into a vertical mill; according to the invention, sodium sulfate of coking desulfurization ash is utilized to excite condensation and hardening of superfine slag powder, and development of compressive strength is promoted. Sodium sulfate can react with calcium in the stainless steel slag powder in the early stage to generate gypsum and sodium hydroxide, sufficient gypsum is provided for reacting with tricalcium aluminate, a large amount of ettringite is generated in the early stage, and the bonding strength is enhanced; compared with the common method using desulfurized gypsum, the addition of the building gypsum powder can adjust the setting time of the cementing material, and can flexibly, conveniently and quickly adjust the application in different scenes.
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