Process for producing LF slagging agents by using electrolytic aluminum carbon slag

Abstract

The invention discloses a process for producing LF slagging agents by using electrolytic aluminum carbon slag. Carbon slag generated by electrolytic aluminum is machined by using a ball mill to reachthe particle size being 0.5-1.5 mm and to achieve excellent chemical reaction activity; calcined serpentine powder is purchased; the serpentine powder comprises the following components including, byweight, 30%-45% of SiO2, 30%-50% of MgO and less than 2% of Al2O3; the particle size is controlled to be 3-5 mm; the serpentine powder is applied as aggregates for pelletization; the materials are uniformly mixed according to the mass percentage ratio being 87:10; then, 3% of MgCl is fed as bonding agents; the materials are pressed as slagging agent spheres being 30-50 mm by adopting a dry powdersphere press; the slagging agent spheres comprise the following components including, by mass, less than 5% of MgO, more than 30% of F, less than 5% of SiO2, and less than 25% of Na; the slagging agent spheres are carried to an LF production line for future use, and are normally used according to an LF slagging agent application method; and the use level of slagging agents is within 0.8-3 kg per ton of steel.

Description

technical field [0001] The invention relates to a process for producing LF deslagging agent by using electrolytic aluminum carbon slag. Background technique [0002] Electrolytic aluminum carbon slag is a kind of hazardous waste. In the production process of electrolytic aluminum, the anode carbon block and the cathode carbon lining can be removed from the The carbon block or lining flakes off and enters the electrolyte, forming carbon slag. [0003] The main component of carbon slag is ice stone (Na 3 AlF 6 )-based sodium aluminum fluoride, α-A1 2 0 3 and carbon; the carbon content is about 40%, and the electrolyte cyanide is about 60%. The main components of a typical carbon residue are shown in Table 1 below: [0004] [0005] Carbon slag is a kind of hazardous waste, and the national hazardous waste catalog code is 331-023-48 "waste electrolytic battery column produced during crude aluminum refining process" [0006] Literature review (1) Li Hong published a pap...

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Problems solved by technology

[0007] According to the above literature introduction, it can be seen that there is no technology to produce LF deslagging agent by using electrolytic aluminum overhaul slag

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