5 results about "Liquation" patented technology

The invention relates to the field of ferrous metallurgy, in particular to high-purity, high-homogeneity and fully-quenched GCr20MnMoRE rare earth bearing steel for a large cylindrical roller and a preparation method of the high-purity, high-homogeneity and fully-quenched GCr20MnMoRE rare earth bearing steel. The alloy comprises the following components in percentage by weight: 0.90 to 1.20 percent of C, 0.10 to 0.60 percent of Si, 0.60 to 1.20 percent of Mn, 1.60 to 2.20 percent of Cr, 0.40 to 1.0 percent of Mo, 0.10 to 0.50 percent of Ni, 0.005 to 0.020 percent of RE and the balance of Fe and inevitable impurities. According to the rare earth alloy steel for the large cylindrical roller, through RE + Mo co-alloying, molten steel purification and inclusion modification, liquation is avoided, and the hardenability is improved, so that network carbide, structure consistency and hardness uniformity are controlled. Moreover, the high-purity, high-homogeneity and full-through-quenching large cylindrical roller is obtained through the process technologies of purification smelting, rare earth deep deoxidation, airtight protection pouring, low-oxygen secondary remelting, high-temperature homogenization, uniform large deformation, forging rolling rapid cooling, efficient spheroidizing annealing, isothermal salt bath isothermal quenching, multiple gradient tempering and the like.

The invention discloses a method for treating and recycling valuable metals from ITO target carbon thermal reduction waste residues, and belongs to the technical field of resource recycling. The method comprises the following steps: (1) grinding the ITO target carbon thermal reduction waste residue to obtain waste residue powder; (2) uniformly mixing the iron oxide with the waste residue powder, heating the mixture under a vacuum condition, and reacting the mixture to obtain a reaction product; (3) the reaction product is subjected to liquation treatment, and indium-rich tin alloy and iron-containing residues are obtained; and (4) carrying out graded vacuum distillation on the indium-rich tin alloy to obtain crude tin and crude indium products. According to the method, the introduced iron oxide has the effects of catalytic oxidation and phase separation and enrichment of valuable metals in the residues in the reaction process of the ITO target carbon thermal reduction waste residues, and on the basis of high environmental friendliness and low cost, the'wrapping-dispersing 'structure in the waste residues is effectively broken, so that the reduction thoroughness of indium and tin metals in the waste residues is improved, and the recovery rate of the indium and tin metals in the waste residues is increased. And the indium and tin metal separation recovery rate is improved.

The invention provides a cold-rolled working roll and a preparation method thereof, and relates to the technical field of forging, the preparation method of the cold-rolled working roll comprises the following steps: heating a steel ingot to 1190-1210 DEG C, preserving heat for 9-11 hours, and then performing first upsetting and drawing to obtain a first intermediate forging; the first intermediate forge piece is heated to 1190-1210 DEG C, heat preservation is conducted for 9-11 h, then secondary upsetting and drawing are conducted, and a second intermediate forge piece is obtained; the second intermediate forge piece steel ingot is heated to 1170-1180 DEG C, heat preservation is conducted for 7-8 h, then third upsetting and drawing are conducted, and a third intermediate forge piece is obtained; and performing post-forging heat treatment on the third intermediate forge piece to obtain the cold-rolled working roll. By adopting the preparation method disclosed by the invention, the formation of meshy or chain-distributed liquation carbides in the cold rolling working roll can be avoided.

The invention belongs to the technical field of metallurgical processes, and particularly relates to a tin hard head liquation refining process which comprises the following steps: step 1, adding solid tin hard heads into lead alloy liquid in batches, stirring, controlling the temperature of the lead alloy liquid to be 610-680 DEG C during stirring, stopping stirring after the tin hard heads are granular or powdery, and fishing out dross to obtain crude tin liquid; step 2, performing condensation to remove iron and arsenic; and step 3, removing iron and copper after arsenic is qualified. According to the method, the metal high-temperature liquation technology is adopted, the crude tin is separated out from the tin hard head, the process that in the traditional process, after crushing, the tin slag is matched for secondary furnace feeding is replaced, and the problems that in the traditional process, melting is difficult, the period is long, and the tin yield is low are solved.