A method for fully recovering and reusing aluminum-calcium refining slag in cold state

Through the patent of aluminum-calcium refining slag, the aluminum-calcium refining problem is solved through the full recovery method of aluminum-calcium refining slag, and the technical problem of aluminum-calcium refining slag is realized.

CN119242868BActive Publication Date: 2025-09-23山西建龙实业有限公司
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Patent Information

Application Number
CN202411296917.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-18
Publication Date
2025-09-23
Estimated Expiration
2044-09-18

AI Technical Summary

Technical Problem

In the existing technology, it is difficult to achieve full recovery and efficient reuse of cold-state recycling of aluminum-calcium refining slag, resulting in resource waste and environmental pollution. In addition, hot-state recycling can only recover some beneficial elements and cannot meet the various metallurgical needs of the steelmaking system.

Method used

Through the cold full recovery method of aluminum-calcium refining slag, including the steps of preliminary crushing, slow cooling, screening and cold solid pressing, multifunctional composite cold solid pressing balls are produced, which are used in multiple metallurgical links of the converter steelmaking system to achieve full recycling of aluminum-calcium refining slag.

Benefits of technology

Nearly 100% cold recovery and reuse of aluminum-calcium refining slag has been achieved, which reduces steelmaking costs, improves slag quality, and reduces environmental pollution. In the production process, multifunctional products are used in the converter metallurgical link to replace part of the calcium slagging agent, reduce lime and other auxiliary materials, solve the resource waste problem of aluminum-calcium refining slag, and achieve full reuse of aluminum-calcium refining slag.

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Abstract

The present invention discloses a method for cold-state full recovery and reuse of aluminum-calcium refining slag, which belongs to the technical field of solid waste reuse in iron and steel metallurgy. The classic aluminum-calcium refining slag produced by reduction desulfurization processes such as LF refining and converter top slag modification has the characteristics of low phosphorus content, high alkalinity, low melting point and certain sulfur content. The method of the present invention can realize cold-state full recovery, reprocessing and reuse of the aluminum-calcium refining slag in the converter steelmaking system. The recovered aluminum-calcium refining slag block and the recovered aluminum-calcium refining slag powder composite pelletizing by-product can be applied to metallurgical links such as converter oxidation dephosphorization slag making, silicon deoxidation steel top slag modification, LF stirring decarburization and fluxing, realizing true cold-state full recovery and reuse of aluminum-calcium refining slag, which has positive significance in reducing environmental pollution, improving the quality of steel slag hot stewing by-products, and reducing steelmaking costs.
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