Recycling method for vanadium-chromium waste residues
The invention discloses a recycling method for vanadium-chromium waste residues. The recycling method comprises the following process steps: drying and dehydrating the vanadium-chromium waste residues at 300-450 DEG C, and pressing the vanadium-chromium waste residues into ball materials, namely gre...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The invention discloses a recycling method for vanadium-chromium waste residues. The recycling method comprises the following process steps: drying and dehydrating the vanadium-chromium waste residues at 300-450 DEG C, and pressing the vanadium-chromium waste residues into ball materials, namely green pellets, under pressure of 20-22Mpa; adding the green pellets, a reducing agent and calcium oxide into an alloy furnace in three stages in sequence, paving the green pellets on the bottom of an electric furnace before adding first-stage materials; and adding the first-stage raw materials after electrifying, reducing the reducing agent to reduce after melting completely, sequentially adding second-stage and third-stage materials after smelting out lean slag, and reducing to obtain a vanadium-chromium-iron alloy. According to the recycling method disclosed by the invention, the vanadium-chromium-iron alloy is produced by adopting the vanadium-chromium waste residues, the alloy can replace high-valence steelmaking additives of chromium iron, vanadium iron and the like, and is added into molten steel to perform micro-alloying, so that the vanadium and the chromium resources are recycled, the process cost is reduced, and the energy-saving and environment-friendly effects are very remarkable. |
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