40results about How to "Enable direct recycling" patented technology

The invention relates to a process and device for recovering electrolytic copper from copper-containing wastewater. The electrolytic copper is produced by adopting the technological processes of removing suspended matters and part of organic matters through pretreatment, carrying out ultrafiltration treatment, retaining concentrated copper sulfate with a nanofiltration membrane, recovering wastewater and acids with a reverse osmosis membrane and carrying out cyclone electrolysis. The process and the device have the beneficial effects that the recovery rate of the electrolytic copper is 90% and the copper purity is more than 99.95%; meanwhile, the wastewater recovery rate is more than 90%; the recovery rate of free sulfuric acid in the wastewater is more than 90%; the resource recovery rate is high and the economic benefits are good; adopting the technological processes of combined adsorption resin, ultrafiltration membrane, acid stabilizing nanofiltration membrane and high desalting rate reverse osmosis membrane, compared with other membrane recovery systems, the process has the advantage that the properties and service lives of the membranes can be maintained for a long term; the process has the effects of achieving automatic control and ensuring stable operation of a wastewater treatment system and the quality of recovered matters; the process is suitable for recovering copper in the copper-containing wastewater in the electroplating industry, the electronic industry and the metallurgical industry and other copper-containing industrial wastewater and for wastewater treatment.

The invention discloses a device capable of generating electric energy and simultaneously removing metal ions and a method of the device. An anode chamber is connected with a cathode chamber by an immobilized electrolyte device, an anode is arranged in the anode chamber, a cathode is disposed in the cathode chamber, the anode and the cathode are respectively connected with two ends of an external load by leads, an outlet of an anode liquid storage chamber is sequentially connected with a first liquid delivery chamber and an inlet of the lower portion of the anode chamber via liquid delivery pipes, an inlet of the anode liquid storage chamber is connected with an outlet of the upper portion of the anode chamber, an outlet of a cathode liquid storage chamber is sequentially connected with a second liquid delivery pump and an inlet of the lower portion of the cathode chamber, and an inlet of the cathode liquid storage chamber is connected with an outlet of the upper portion of the cathode chamber. Electrons are outputted after oxidation reaction of electroactive substances of the anode, and are shifted to the cathode, metal ions of the cathode receive the electrons to realize reduction reaction so as to generate substances or simple substances with less toxicity, and electric energy is generated under the certain external load. When the method is applied to treating waste water containing metal ions, a large amount of chemical is omitted, high energy consumption is avoided, and the electric energy can be generated.

The invention relates to a recycling treatment process for recovering pure water and pure nickel from electro-nickelling rinsing wastewater. The recycling treatment process adopts a variety of ion exchange resin-acid stabilizing nanofiltration membrane-cyclone electrolysis combined processes and has the advantages that pure water and metal nickel can be directly recovered from the wastewater, the nickel recovery rate is greater than or equal to 90%, the electrolytic nickel purity is greater than or equal to 99.95%, the wastewater recovery rate is greater than or equal to 70%, and the electrical conductivity of the recovered water is smaller than or equal to 10 micro-seconds / cm. Compared with other methods, the recycling treatment process is high in resource recovery rate and good in economic benefit, can ensure stable operation of a wastewater treatment system and the quality of recovered substances and is suitable for nickel recovery from nickel-containing wastewater and other nickel-containing industrial wastewater and wastewater recycling treatment in the electroplating industry, electronic industry and metallurgical industry.

A hydrogen shaft furnace ironmaking system and method using electric energy heating, the system includes a water electrolyzer, a hydrogen storage tank, an electric energy heating hydrogen shaft furnace, a heat exchanger, and a gas mixing tank; the furnace body is provided with a microwave heating section, a middle section, The induction heating section, the cooling section and the screw discharger, the air inlet pier is below the cooling section, and the water electrolyzer, hydrogen storage tank, heat exchanger, gas mixing tank are connected with the air inlet of the air inlet pier in sequence. The method is as follows: (1) The hydrogen gas generated by the electrolysis of the water electrolyzer is passed into the hydrogen storage tank; (2) The hydrogen gas is passed into the coil in the heat exchanger, discharged into the gas mixing tank, and passed into the furnace body through the air inlet pier; (3) Turn on the microwave radiation source and the induction coil; (4) Put the iron-containing material into the furnace body to exchange heat with the gas and undergo a reduction reaction; (5) After the iron-containing material passes through each section of the furnace body, it will generate direct reduced iron and discharge it. The method of the present invention avoids oxygen blowing at the upper part, can realize the direct recovery and utilization of part of the high-temperature tail gas on the top of the furnace, reduces energy consumption and operation cost, and can avoid pipeline material failure and other related safety accidents caused by hydrogen diffusion.

The invention discloses a method for smelting lead paste of a waste lead storage battery. The method comprises the following steps: mixing the lead paste of the waste lead storage battery with a reducer-coke or powdered coal, copper residues, iron ores, quartz sand and limestone, wherein the additive amount of the coke or the powdered coal is 10%-25% by weight of the lead paste of the waste lead storage battery, the weight of the copper residues is 5-10 times that of sulfur in the lead paste of the waste lead storage battery, the added limestone, quartz sand and iron ores meet the smelting slag requirements that the weight ratio of FeO to SiO2 is 1.2 to 1.75 and the weight ratio of CaO to SiO2 is (0.4-0.9) to 1; adding a mixture into a cylinder or a disk granulator for granulating; conveying granulated materials into a smelting furnace; filling the smelting furnace with oxygen-rich air for reduction smelting. According to the method, a reducing atmosphere is controlled, so that copper-sulfur concentrates are obtained by reacting the copper residues with sulfur in the waste lead storage battery while crude copper is produced, and lead, copper and sulfur are directly recovered; the recovery rate of crude copper is more than 98% and the comprehensive recovery rate of copper and sulfur is more than 95%.