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592results about How to "Increase oxygen concentration" patented technology

One-step copper smelting technology and device thereof

The invention relates to a one-step copper smelting technology and a device thereof. The interior of a furnace body is divided into three zones, namely a smelting zone, a blowing zone and a refining zone, by a retaining wall; and two rows of spray guns which are arranged in a staggered manner and have an included angle with a vertical line are arranged at the bottoms of the zones; return dust is mixed and then added into mixed copper concentrate and a solvent through a charging opening of the smelting zone, oxygen-enriched air is sprayed through the spray guns to carry out self-heating smelting, to generate copper matte; the spray guns in the blowing zone spray oxygen-enriched air so as to blow copper matte into crude copper and slag; the spray guns in the refining zone supply oxygen-enriched air for oxidization, and supply natural gas as a reductant for reduction, and the generated anode copper with high purity is interruptedly discharged form a copper discharging opening, so that the low-altitude pollution problem caused by SO2 can be solved, the operation environment can be greatly improved, the utilization rate of sulfur and heat can be obviously increased, and further the economic benefits can be increased further; in addition, the invention provides a one-step copper smelting technology which is more advanced, shorter in flow, lower in investment, lower in comprehensive energy consumption, higher in recovery rate, and better in comprehensive utilization in comparison with the existing continuous copper smelting technology.
Owner:DONGYING LUFANG METAL MATERIAL

Preparation method and application of porous hydrophilic denitrification biological carrier

The invention discloses a preparation method and application of a porous hydrophilic denitrification biological carrier. The method comprises the following steps of: adding 75 mass parts of polyether polyol, 25 mass parts of polymer polyol, 3 mass parts of blackwash, 2 mass parts of dichloromethane, 0.25 mass part of surfactant, 0.25 mass part of amine catalyst, 0.3 mass part of tin catalyst and 5 mass parts of water into a 23 to 27 DEG C reaction kettle, and stirring; adding 52.5 mass parts of active agent, and uniformly stirring; adding 62.5 mass parts of toluene diisocynate, uniformly stirring, and performing reaction molding; and putting polyurethane foam subjected to reaction molding into a demolding tank, and blasting for demolding to obtain a magnetic biological denitrification carrier. The carrier prepared by the method has adsorption and catalytic oxidation effects and large specific surface area, a highly active biological film can be quickly formed, microbial cells can reproduce and grow on the huge surface of the carrier and absorb and degrade toxic or inhibiting substances, the carrier has a strong nitrification effect and a certain denitrification effect and can remove total nitrogen, and the residual sludge is obviously reduced.
Owner:ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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