4results about How to "Reduce desulfurization cost" patented technology

The present invention discloses a welding wire for gas shielded arc welding, and a steel wire rod of a welding wire for gas shielded arc welding and a production method therefor. Chemical components of the steel wire rod of a welding wire for gas shielded arc welding include, in mass percentage, 0.03%-0.08% of C, 0.5%-1.0% of Si, 1.4%-1.8% of Mn, 0.013%-0.1% of S, less than or equal to 0.0015% of P, less than or equal to 0.8% of Ni, less than or equal to 0.4% of Cr, less than or equal to 0.4% of Mo, and the balance of Fe and inevitable impurities; and a liquidus temperature TL=1537-88[C]-8[Si]-5[Mn]-30[P]-25[S], a solidus temperature Ts=1536-415[C]-12[Si]-6.8[Mn]-125[P]-184[S], and 25°C≤TL-TS≤45°C.

This invention relates to a method for recovering associated zinc from copper concentrate during copper smelting, belonging to the field of non-ferrous metal smelting and mineral processing technology. The method includes: preparing and grinding copper concentrate to obtain a finely ground slurry; the -0.074 mm particles in the finely ground slurry constitute 92-95% of the total solid particles; mixing the finely ground slurry with a copper collector and a zinc inhibitor; the zinc inhibitor contains sulfur dioxide, and the mixing temperature of the zinc inhibitor and the finely ground slurry is 40-50°C; and using microbubble flotation technology to separate copper from zinc concentrate using flotation, obtaining copper concentrate and zinc concentrate; the foam diameter of the microbubble flotation is 30-80 μm. This invention achieves efficient inhibition of zinc minerals by controlling the copper flotation separation temperature, at which waste sulfur dioxide is used synergistically as a zinc inhibitor, further controlling the particle size of the fine grinding and the foam diameter during flotation, thus constructing an integrated copper-zinc separation and zinc recovery process.

The invention discloses a method and system for establishing a cost performance evaluation model of a blast furnace gas desulfurizer, and the method comprises the steps: determining the evaluation indexes required by the establishment of the cost performance evaluation model of the blast furnace gas desulfurizer: the actual desulfurization effect S and desulfurization cost P of the desulfurizer, and then calculating the cost performance index K of the desulfurizer through the evaluation indexes, k = the actual desulfurization effect S of the desulfurizer / the desulfurization cost P; the established desulfurizer cost performance evaluation model can provide technical support for economic purchase and preferential selection of blast furnace gas desulfurizers; according to the establishment method provided by the invention, the effective indexes influencing the actual desulfurization effect of the desulfurizing agent and the effective indexes influencing the desulfurization cost are clarified, the indexes influencing the actual desulfurization effect and cost of the desulfurizing agent are quantitatively evaluated in a unified manner, a certain guiding effect is provided for optimal selection of the blast furnace gas desulfurizing agent, and the optimal desulfurizing agent can be selected in an auxiliary manner; the desulfurization cost is reduced, the desulfurization effect is improved, and the cost performance of blast furnace gas desulfurization is maximized.

The utility model discloses a reactor and a reaction system for low-temperature catalytic decomposition of sulfur oxides, and relates to the technical field of flue gas desulfurization, in particular to a reactor and a reaction system for low-temperature catalytic decomposition of sulfur oxides, the reactor is a spherical reactor with the diameter larger than 15mm, and macropores and mesopores are uniformly distributed on the surface and inside the reactor. Macropores and mesopores are communicated with the outside of the reactor and are loaded with a catalyst, and SO2 is decomposed and removed at a low temperature of 100-130 DEG C under the synergistic effect of the catalyst and the porous structure of the spherical reactor, so that the desulfurization efficiency is remarkably improved, the energy consumption is reduced, the desulfurization cost of flue gas is reduced, and secondary pollution is eliminated.