30results about How to "Low cost recycling" patented technology

The invention discloses a method for recycling ilmenite from vanadium titano-magnetite iron dressing tailings. The method comprises the steps that the specific susceptibility of main gangue in the iron dressing tailings, the specific susceptibility of the ilmenite in the iron dressing tailings and the content of TiO2 in the iron dressing tailings are determined; when the iron dressing tailings meet the condition 1, the iron dressing tailings are subjected to first-section strong magnetic separation, first-section strong magnetism concentrates are subjected to one-time or multi-time reselection, and gravity concentrates are obtained; the gravity concentrates are subjected to first-time flotation and one-time or multi-time electric separation, and ilmenite concentrates are obtained, wherein the condition 1 can be shown in the formula: X1>(X2*60%), the total amount of the iron dressing tailings serves as a standard, the content of the TiO2 in the iron dressing tailings is lower than 5 wt%, X1 is the specific susceptibility value of the main gangue in the iron dressing tailings, and X2 is the specific susceptibility value of the ilmenite in the iron dressing tailings; and otherwise, the iron dressing tailings are subjected to a strict granularity classification method. By mean of the method, the production cost of the ilmenite is reduced, and the grade of the TiO2 of selected raw ore obtained after electric separation and flotation is improved.

A method of recovering petroleum from dormant oil wells or increasing the production of oil wells is disclosed. An alkali or alkali earth carbonate is introduced into a water layer associated with a subterranean petroleum reservoir and/or an explosive composition is introduced into an oil layer associated with a subterranean petroleum reservoir. CO₂ gas is produced by reacting the alkali or alkali earth carbonate with an acid and/or by detonating the explosive composition. An explosive composition can be introduced and detonated to achieve sufficient CO₂ gas production to increase pressure within the subterranean petroleum reservoir. Petroleum recovery can be further enhanced through the use of recycling.

The invention provides a dedusting method and a system for coal moisture control. The method includes mixing flue gas from drier outlet with high-temperature coke oven flue gas, introducing into a bag dust collector, introducing coal dust from the dust bin of the bag dust collector into an ash discharge screw via a rotary ash unloading valve, humidifying the dried coal dust in a humidifying stirrer, discharging, and recovering. The ash discharge screw has gas seal and packing seal structure. The invention solves the problems of existing coal moisture control process, such as high flammability, explosiveness, dewing of flue gas induced difficulty in ash removal, and blocking of ash discharge system caused by formation of a large amount of water vapor due to contact of hot coal dust with cold water.

The invention relates to a processing process of APET plastic products, in particular to a printing and forming process of environment-friendly APET plastic products. The printing process comprises the following steps:1) making an APET plastic plate; 2) embossing a leading wire on the APET plastic plate and laminating a film on the APET plastic plate; 3) cutting the APET plastic plate; 4) carrying out silk-screen printing; 5) coating the APET plastic plate with a protective film layer; 6) pressing sides; 7) carrying out die-cutting forming; and 8) carrying out high-frequency splicing. According to the process, the APET plastic is used as an original material of the plastic products so that the environment can be protected, the resources can be recycled, and the processing cost can be reduced; the reasonable printing process is adopted so that the pattern printing and the pattern die-cutting forming of the APET plastic sheet material can be smoothly completed in shortest time and in most convenient operation steps; and the most suitable forming process is adopted, so that the APET sheet material can be stereoscopically formed smoothly, and the APET plastic products which are attractive in printing, stable in quality and energy-saving can be obtained.

The invention discloses a precise vertical recovery control method for a large-airspace high-dynamic rocket sublevel landing area. A guidance control system adopts a quick time-varying and multi-channel coupling attitude control method for design, an algorithm and a program operate on a dual-core embedded computer in a navigation and guidance control integrated system, control law calculation in alarge-airspace high-dynamic high-Mach flight state is carried out by using current Mach number and pose information, calculated by the dual-core embedded computer, of a rocket sub-stage, pitching, yawing and rolling channel control instructions of a rocket sub-stage grid rudder are solved in real time, and the sub-stage is guided to vertically land towards a target point area. The method is mainly used for solving the accurate control problem of the sub-stage of a carrier rocket under the conditions of violent flight state change, high Mach, large airspace and high dynamic flight, the systemis simple in structure, convenient to implement and high in universality, and the main flight task of the carrier rocket is not affected.

A method of recovering petroleum from dormant oil wells or increasing the production of oil wells is disclosed. An alkali or alkali earth carbonate is introduced into a water layer associated with a subterranean petroleum reservoir and/or an explosive composition is introduced into an oil layer associated with a subterranean petroleum reservoir. CO₂ gas is produced by reacting the alkali or alkali earth carbonate with an acid and/or by detonating the explosive composition. Additional explosive composition can be introduced and detonated to achieve sufficient CO₂ gas production to increase pressure within the subterranean petroleum reservoir.

The invention discloses a silk degumming/scouring agent and applications thereof, and concretely discloses a silk degumming/scouring agent strongly-alkaline electrolytic water, and new uses and new technologies of the silk degumming/scouring agent in processing processes comprising silk wadding quilt processing, cut bave or silk degumming, silk cotton, pure silk blank material refining and the like. Common tap water directly is directly electrolyzed through a water electrolyzing device or an electrolytic tank to form strongly-alkaline electrolytic water having a pH value of 11.0-12.0, and the strongly-alkaline electrolytic water can be used as a silk wadding sheet scouring agent, a cocoon shell or silk degumming agent, a silk cotton scouring agent, a pure silk or blank silk scouring agent, and the like. The silk degumming/scouring agent has the advantages of small damage to silk fibers, complete degumming, maintenance of the original resilience and other mechanical performances of the fibers, realization of direct low-cost high-efficiency recovery of sericin from a degum solution without desalination, and avoiding of the server environmental pollution of sericin-containing alkaline wastewater and the huge biological resource waste.

A method of recovering petroleum from dormant oil wells or increasing the production of oil wells is disclosed. An alkali or alkali earth carbonate is introduced into a water layer associated with a subterranean petroleum reservoir and/or an explosive composition is introduced into an oil layer associated with a subterranean petroleum reservoir. CO₂ gas is produced by reacting the alkali or alkali earth carbonate with an acid and/or by detonating the explosive composition. An explosive composition can be introduced and detonated to achieve sufficient CO₂ gas production to increase pressure within the subterranean petroleum reservoir. Petroleum recovery can be further enhanced through the use of one or more techniques to reduce petroleum viscosity including sonication and microwave radiation.

The invention discloses a method for reeling silk at low temperature by utilizing strongly alkaline electrolyzed water, falling into silk making technical field. The method includes subjecting common tap water to electrolytic treatment via water electrolyzer or electrolytic cell, to obtain strongly alkaline electrolyzed water with pH of 11.0-12.0; performing constant-temperature oscillation swelling soaking treatment on silkworm cocoon in strongly alkaline electrolyzed water at 60-80 DEG C directly for 5-10 min; and taking strongly alkaline electrolyzed water as reeling hot water bath, transferring the swollen silkworm cocoon to the reeling hot water bath at 40-70 DEG C, and immediately reeling silk, to obtain raw silk product. The inventive method performs reeling at low temperature, to improve product quality and save energy. The invention can realize industrial production of strongly alkaline electrolyzed water at low cost and high yield, high-efficiency low-cost recovery of sericin, and cyclic utilization of reeling waste water after simple purification treatment, to thereby avoid environmental pollution caused by a large amount of waste liquid.

The invention discloses a method for absorbing and recovering high-concentration oil vapor, which belongs to the technical field of oil vapor recovery, and comprises the following steps that: the high-concentration oil vapor flows through an absorption column filled with a mesopore absorbent and micropore absorbent double-layer fixed bed under normal temperature and normal pressure, the mesopore absorbent is arranged at the lower part of the absorption column, and the micropore absorbent is arranged at the upper part of the absorption column; and the absorbent absorbing organic substances is vacuumized and desorbed, and the desorbed oil vapor is condensed or absorbed and then returns to an oil tank. The concentration of the oil vapor at an outlet of the absorption column processed by the invention can be reduced to 25g/cm3, which can achieve the national control standard of oil vapor pollutant emission; and the oil product returning to the oil tank continues to be used, and the oil vapor recovery rate reaches more than 93 percent. According to the characteristics of the high-concentration oil vapor, the invention develops a double-layer fixed bed absorption process combined by the mesopore high molecular polymer absorbent and the micropore absorbent, and the high absorption capacity of the mesopore absorbent and the high absorption efficiency of the micropore absorbent are coupled, thereby achieving the efficient utilization of the high-concentration oil vapor.

The invention relates to a method for preheating shifted hydrogen by utilizing direct reduction iron furnace top gas. The method comprises the following steps: cooling the furnace top gas to less than 180 DEG C, pressurizing to more than 9kg, obtaining normal-temperature shifted hydrogen with the H2 content more than or equal to 96% by using a CO-H2 technology, exchanging heat with the furnace top gas, heating to 330-480 DEG C, heating to 400-600 DEG C by using a partial oxidation method, adding into molten iron bath high-temperature raw gas, obtaining furnace feeding circulating reduction gas with the hydrogen-carbon ratio greater than 1.1, the temperature being 630-1050 DEG C and the oxidation degree (H2O + CO2) less than or equal to 3%, and introducing the circulating reduction gas into a direct reduction iron shaft furnace to produce direct reduction iron. According to the method, heat exchange is carried out between the furnace top gas and the shifted hydrogen, the temperature of the shifted hydrogen is further increased by the partial oxidation method, the heat of the direct reduction iron furnace top gas, the heat generated by shift reaction and water vapor in the furnace top gas are fully utilized, and the energy utilization efficiency is improved.

The invention provides a treatment process of nickel-containing alloy powder in a hydrochloric acid system. The treatment process comprises the following steps that (1) presoaking of the nickel-containing alloy powder is carried out, specifically, the nickel-containing alloy powder, concentrated hydrochloric acid and water are mixed, and then heated, stirred and presoaked; (2) high-pressure oxygen introduction and leaching is carried out, specifically, prepreg is poured into a high-pressure kettle, heating is carried out, oxygen is introduced to react for a certain time, cooling and liquid-solid separation are carried out, leaching residues are produced and stacked, and leaching liquid enters a next process; (3) neutralization and impurity removal are carried out, specifically, the pH value of the leaching liquid is adjusted by using nickel carbonate, a neutralization solution and neutralization slag are produced, and the neutralization slag returns to the leaching process; (4) cobalt extraction with resin is carried out, specifically, cobalt ions in the neutralization solution is adsorbed with the resin to produce cobalt carbonate precipitate and cobalt-extracted liquid; and (5) product preparation is carried out, specifically, nickel carbonate is prepared from a small part of cobalt-extracted liquid for a neutralization and impurity removal process, the rest liquid is concentrated and pyrolyzed, hydrochloric acid is produced for recycling, and nickel oxide is taken as a final product. According to the treatment process, the nickel oxide product is produced through the leaching, purifying and pyrolyzing processes, meanwhile, hydrochloric acid and a neutralizing and impurity-removing reagent are recycled, and the treatment process is clean and environmentally friendly.

The invention discloses a solid waste pelletizing process and an efficient sintering method thereof, waste magnesium oxide powder, iron-containing solid waste and a binder are adopted as raw materials, and solid waste pellets are prepared after burdening, surface modification and pelletizing; and mixing the solid waste pellets and a mineral mixture prepared by adopting a mixing granulation process as sintering raw materials, and sequentially carrying out material distribution, ignition, sintering, cooling and whole grain screening to obtain a finished product of sintered ore, the binder is prepared from waste magnesium oxide sludge, municipal sludge, first quick lime and corn starch; the waste magnesium oxide powder and the waste magnesium oxide sludge are magnesium oxide wastes. According to the method, the magnesium oxide waste, the municipal sludge, the rotary hearth furnace fine powder and other solid wastes inside and outside the steel plant are fully recycled, local concentrated heterogeneous sintering of magnesium oxide is realized, the adverse effect of uniform distribution of MgO on the sintering productivity is avoided, the quality of solid waste pellets is improved, and the production cost is reduced. Therefore, the quality index and the heat energy utilization efficiency of the finished sinter are remarkably improved, and fuel consumption and CO2 emission are reduced.

The invention discloses a remote type auxiliary anode automatic recycling device. A containing cavity is formed in a pressure-proof protecting cylinder. An inflating type floating device, a compressedair bottle and an inflating valve are arranged in the containing cavity. The inflating valve is connected between the inflating type floating device and the compressed air bottle. The inflating valveis turned on to be used for enabling the compressed air bottle to inflate the inflating type floating device. A protecting plate seals and covers an end opening of the containing cavity. The protecting plate and the containing cavity are detachably connected. A signal receiver is fixedly connected with the pressure-proof protecting cylinder and electrically connected with the inflating valve. A signal transmitter is used for sending a recycling signal to the signal receiver, thus the signal receiver is triggered to turn on the inflating valve, the inflating type floating device in an inflation state is used for pushing the protecting plate to be popped out of the containing cavity, thus the remote type auxiliary anode automatic recycling device is driven to float up, and therefore efficient and low-cost recycling of the remote type auxiliary anode automatic recycling device is achieved.

A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use of copper solvent/solution extraction techniques or apparatus. A process for recovering copper from a copper-containing ore generally includes the steps of providing a feed stream containing comminuted copper-containing ore, concentrate, or other copper-bearing material, leaching the feed stream to yield a copper-containing solution, conditioning the copper-containing solution through one or more physical or chemical conditioning steps, and electrowinning copper directly from the copper-containing solution in multiple electrowinning stages, without subjecting the copper-containing solution to solvent/solution extraction prior to electrowinning.

The invention relates to a cooling tower airflow generating set which comprises a high temperature steam pipeline, a cold water spraying head, a flow board, an inclined cover plate, a flow guiding plate and a hot air generating set, wherein the high temperature steam pipeline is arranged at the lower part of a cooling tower and above an air inlet in the lower part of the cooling tower; the cold water spraying head is arranged in the cooling tower and above the high temperature steam pipeline, and faces the high temperature steam pipeline; the flow board is fixed in channel steel fixed in the top of the cooling tower in a downwards-inclined manner through a fixing device; a circle of flow guiding plate is arranged on the inclined cover plate; and the hot air generating set is arranged in the center of the inclined cover plate. The high temperature steam pipeline is sprayed through the cold water spraying head, the spraying is combined with the air inversed flow to produce a large amount of hot steam, and the hot steam is converted into electric energy, so that the heat energy produced in exhausting steam of the cooling tower is recovered and used at a low cost, and the generating set is recycled and very practical.