A recovery system applied to metal-containing sludge separation and alloy configuration method

By diverting, washing, and agglomerating metal-containing sludge from different sources, combined with staged reduction heat treatment and liquid phase enrichment, the problem of large compositional fluctuations in metal-containing sludge treatment was solved, and stable alloy recovery and resource utilization were achieved.

CN122445928APending Publication Date: 2026-07-24HANGZHOU HS MAGNETICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU HS MAGNETICS CO LTD
Filing Date
2026-04-23
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing technologies, the treatment methods for metal-containing sludge fail to effectively distinguish sludge from different sources, leading to the migration of high-salt components and fine-particle impurities during heat treatment. This results in the difficulty of stably recovering the target metal, large fluctuations in alloy composition, and poor stability.

Method used

By inspecting incoming metal-containing sludge from different sources, the sludge is divided into high-salt and low-salt branches. The high-salt branches undergo multi-stage countercurrent washing and solid-liquid separation. The low-salt sludge cake and the sludge from the low-salt branches are treated to prevent agglomeration and then subjected to segmented reduction heat treatment. Combined with liquid phase enrichment, the sludge is stored in stages and the feeding scheme is adjusted according to the target alloy composition to achieve stable recovery.

Benefits of technology

Stable recovery of target metals was achieved, alloy composition fluctuations were reduced, the stability of alloy configuration and resource utilization rate were improved, impurity loss was reduced, and a more complete resource utilization pathway was formed.

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Abstract

The application relates to the field of metal secondary resource recovery and regenerated alloy preparation, and discloses a recovery system applied to metal-containing sludge separation and an alloy configuration method.The method first detects the moisture content, chlorine content, water-soluble salt conductivity, loss on ignition and target metal element content of metal-containing sludge from different sources, and divides the metal-containing sludge into a high-salt branch and a low-salt branch according to the detection results; multi-stage countercurrent salt washing and solid-liquid separation are implemented on the high-salt branch to obtain low-salt mud cakes and a salt-containing mother liquor; the low-salt mud cakes and the metal-containing sludge in the low-salt branch are subjected to agglomeration treatment, then are subjected to segmented reduction heat treatment and crushing and separation to obtain first recovery intermediate materials; liquid-phase enrichment is conducted on the salt-containing mother liquor to obtain second recovery intermediate materials; the two types of recovery intermediate materials are classified and stored in different bins, a feeding scheme is generated according to the target element range and the impurity allowable upper limit of a target alloy, and the feeding amount of the next batch is corrected in combination with the furnace composition, the residual metal content of the slag and the impurity enrichment result of the secondary smoke dust.
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