2results about How to "Avoid resource loss" patented technology

The present application relates to steel and non-ferrous smelting slag comprehensive recovery and iron-making resource utilization comprehensive utilization technical field, disclose a kind of copper slag efficient iron-making method based on magnetic separation pretreatment, comprising: to molten iron-silicate base waste slag input by calcium carbide, sodium fluoride and phosphorus component consisting of conditioning agent, using sodium fluoride to build liquid diffusion field exposure reduction interface, induce calcium carbide and iron silicate in situ reduction to generate metal iron core;Heat treatment promotes iron core polymerization growth;Gradient cooling, using phosphorus component induces silicate matrix crystal transformation to generate expansion stress and break matrix;Grinding powder and weak magnetic separation, extract magnetic enrichment product, the present application breaks iron-oxygen-silicon chemical bond, realizes the conversion of combined state iron to independent metal state, achieves iron and gangue phase decoupling, using endogenous stress induction self-pulverization, reduce grinding energy consumption, output high-grade iron powder and simultaneously remove sulfur zinc impurities.

The application relates to the technical field of industrial waste heat recovery, in particular to a centrifuge heat pump system for preparing high-temperature steam by using negative pressure steam, which comprises a flash tank and a heat pump unit. Specifically, the heat pump unit comprises a compressor for increasing the pressure of refrigerant, a condenser for making the pressurized refrigerant release heat and condense, a throttling device for reducing the pressure of the condensed refrigerant, and an evaporator for making the reduced-pressure refrigerant absorb heat and evaporate; the compressor, the condenser, the throttling device and the evaporator are connected through pipelines to form a refrigerant circulation system; a low-temperature heat source input port of the evaporator is connected with an external negative pressure steam source, and the evaporator is also used for condensing steam into liquid and outputting the liquid into the flash tank at least; a high-temperature heat source input port of the condenser is connected with a saturated liquid outlet of the flash tank, and a high-temperature heat source output port of the condenser is connected with a feeding port of the flash tank. The application has the effects of reducing energy waste and realizing efficient utilization of negative pressure steam.