275results about How to "Reduce the amount of material" patented technology

The invention relates to a balancing lead smelting process for comprehensive resource utilization and a device thereof. The process comprises the following steps: granulating a raw material containing lead and a fluxing agent after proportioning, sending to an oxygen bottom-blown smelting furnace for smelting to produce primary crude lead, lead ash and flue gas of SO2; sending the flue gas of SO2 to a sulfuric acid system for acid making after recovering waste heat by a waste heat boiler and duct collection by a dust arrester installation; adjusting form of the lead ash and adding the lead ash to a blast furnace together with coking coal for reducing smelting to produce secondary and third crude lead; electrorefining the crude lead to obtain refined lead and anode slime, treating and recovering the anode slime to obtain lead, stibium, bismuth, gold and silver metals; and separating slag of the blast furnace from the crude lead and sending to a fuming furnace to recover zinc oxide, the lead, indium and germanium. A system for realizing the process comprises the oxygen bottom-blown smelting furnace, an oxygen lance, an electrically-heated settler, a slag casting device, the waste heat boiler with a vertical ascending segment of membrane wall structure, the blast furnace, the fuming furnace and a ventilating device. The process design and system improvement help realize balancing optimized recovery of Pb, Zn, Au, Ag, Bi, Cu, In, Sb and S elements.

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.

A robot cleaner comprising: a body; and a sensor protruding from a top surface of the body, wherein the body comprises a protrusion positioned forward of the sensor relative to a forward driving direction of the robot cleaner, the protrusion extending to a height that is at least equal to the height of the sensor.

The invention relates to a gravity-flotation joint separation technology for coking middlings and belongs to the technical field of mineral processing. The technology comprises the steps of crushing the coking middlings, water medium whirlcone gravity concentration, and ore grinding-floatation of gravity concentration middle products. The technology is characterized in that the water medium whirlcone is adopted for gravity concentration, so that equipment is few in link and simple in technology; no heavy media need consuming, so that operation cost is low; head pulling or tail throwing is adopted for gravity concentration, so that subsequent ore grinding materials are made to be reduced in number, and energy consumption is saved.

The invention discloses a magnetic ore rescreening process for mixed iron ore. The process comprises the following process steps: performing primary ore grinding, performing primary grading, performing primary low intensity magnetic separation, performing primary strong magnetic separation, rescreening, performing high frequency screening and performing secondary ore grinding and selecting. According to the invention, partial qualified iron ore concentrate and partial tailings are thrown out preferentially under the condition that the dissociation degree of useful mineral monomers is insufficient after the primary ore grinding operation, the amount of materials subjected to secondary regrinding and reselecting is reduced, and the aim of reducing the ore dressing cost is achieved.

The invention discloses an additive manufacturing device and method. The device comprises an electron beam generating device and a forming chamber. The electron beam generating device is located above the forming chamber and used for generating rays used for melting powder materials. The forming chamber is used for providing a closed cavity needed by manufacturing. The forming chamber is further internally provided with a powder receiving box and powder tanks. The powder receiving box is arranged at the position of outlets below the powder tanks and used for receiving powder materials discharged out of the powder tanks and carrying out pretreatment. The pretreatment method comprises the step of pouring out the powder materials after heating the powder materials to the preset temperature. In the additive manufacturing method, powder is pretreated layer by layer in the layer-to-layer powder laying process; and powder material pretreatment occupies no extra time, and the additive manufacturing efficiency is not lowered. According to the additive manufacturing device, the powder materials heated every time has the thickness of one layer, material consumption is small, and water is more thoroughly removed.

The invention relates to a prong for a dredging machine, comprising a tip (11) and a nose (12) for coupling same to a fitting (20). The nose includes a lower base body (16) having a cross-section formed by at least four sides and an upper surface (120) which converges in the direction of the lower surface (123) towards the end of the nose (12) located farthest from the tip (11). The upper surface (120) is provided with an upper trapezoidal attachment (15), the upper (153) and lower (154) ends of which also converge in the direction of the end of the nose. The upper attachment (15) and the base body (16) have an equal maximum cross-section at a point from which the lower surface (123) and the upper end (153) converge in the direction of the tip. A flange having a constant or variable cross-section can be provided between the nose (12) and the tip (11).; The prong is fixed to the blades of the dredger propeller using a fitting (20) having a cavity that matches the nose (12) of the prong and a pin (30) which extends through the corresponding vertical housings in the nose (12) of the prong and the fitting.

The invention provides a method of manufacturing a hollow power transmission shaft capable of securing stable quality even if a difference in wall thickness and a difference in hardening rate are present in the axial direction of the transmission shaft. A movable induction heating coil (5) is wrapped around the outer peripheral surface (1g) of a hollow shaft raw material (1'), and moved in the axial direction while flowing a high-frequency current with a specified frequency to the induction heating coil (5) to induction-harden the shaft raw material from the outer peripheral surface (1g). In this case, for small diameter parts (1b) with a rather large wall thickness, the frequency of the high-frequency current led to the induction heating coil (5) is relatively reduced, and for a large diameter part (1a) with a rather small wall thickness, the frequency of the high-frequency current led to the induction heating coil (5) is relatively increased.

The invention is a control system relating to a vacuum carburizing heat-treatment technique, especially a dynamic control system used in low-pressure carburizing heat-treatment furnace, including a corresponding device and the concrete working steps, where the device is mainly composed of computer and control software, PLC, thermocouple, vacuum meter, power supply, workpiece, quenching room, etc, adopting a multi-parameter input computer as control basis, and using above two kinds of vacuum meters, the computer calculates and makes real-time dynamic control according to various inputted parameters, and controls a motor inverter to command the necessary suction of a vacuum pump system, repeating this many time until the depth of carburized layer. Its advantages: it can save carburizing materials; increase loading capacity of the furnace; improves carburizing uniformity; reduce carbon accumulation of the vacuum system; automatically generate complex making course in dynamic control mode; and complete automatic control by computer, eliminating the possible errors caused by artificial operation.

The invention discloses a method for performing synchronous desulfurization, denitrification and dust removal in a bag type dust collector. The method is characterized by comprising the following steps: by taking the bag type dust collector as a reaction device, introducing coal-fired flue gas subjected to electric precipitation into the bag type dust collector through a connecting pipeline, and injecting manganese oxides into the connecting pipeline, so that the manganese oxides are used for performing desulfurization and denitrification on the coal-fired flue gas; allowing the unreacted manganese oxides, desulfurization and denitrification products and smoke dust to enter a filter bag of the bag type dust collector along with the coal-fired flue gas, and retaining the unreacted manganese oxides, desulfurization and denitrification products and smoke dust on the surface of the filter bag to form a filter layer; spraying ammonia gas into the coal-fired flue gas entering the bag type dust collector, and thus reducing the residual nitric oxides in the coal-fired flue gas into nitrogen by virtue of the ammonia gas; recovering and regenerating the materials on the filter layer, and recycling the obtained manganese oxides to be injected into the connecting pipeline. According to the invention, the bag type dust collector serves as a core device, the manganese oxides are taken as active materials, and synchronous and integrated desulfurization, denitrification and dust removal on the flue gas can be realized in the bag type dust collector through a series of separation, regeneration and recycling operations.

The invention relates to an ethylene cryogenic separation method for a large-sized ethylene device. The method includes the steps that mixed gas is precooled, cooled by a series of coolers and separated by a component separation container so that a gas phase and multi-strand liquid phases can be obtained; the gas phase is separated by a series of plate-fin heat exchangers and a component separation container so that a gas phase and multi-strand liquid phases can be obtained, after the pressure of liquid phase methane is reduced, cooling capacity is recycled through the heat exchangers, the liquid phase methane is conveyed to a downstream system, one of the multi-strand liquid phases and the liquid phase methane after pressure reduction are mixed, the rest of the liquid phases enter a demethanizer, and coarse hydrogen products enter the downstream system; the two firstly-coagulated liquid phases in the multi-strand liquid phases respectively enter a pre-demethanizer, and the rest of the liquid phases respectively enter the demethanizer; the pre-demethanizer separates the liquid phases into gas and liquid, the gas is delivered to the demethanizer, and the liquid is delivered to the downstream system; the demethanizer separates the gas phase into methane and C2 which are delivered to the downstream system, and the methane is delivered to the downstream system. By means of the ethylene cryogenic separation method for the large-sized ethylene device, 30% of the size of a cold box is decreased, equipment and cost are reduced, energy saving and cost reduction are achieved, and operating stability is guaranteed.

Various methods and systems are provided for a flexible, lightweight, and low-cost disposable radio frequency (RF) coil of a magnetic resonance imaging (MRI) system. In one example, an RF coil assembly for an MRI imaging system includes a loop portion comprising distributed capacitance conductor wires, a coupling electronics portion including a pre-amplifier; and a disposable material enclosing at least the loop portion, the disposable material comprising one or more of paper, plastic, and/or cloth.

The invention provides a new technology for extracting aluminium oxide from the material containing carbon aluminate. The carbon aluminate is dissolved out the material by weak sodium carbonate solution to be made into carbon aluminate solution that density is less than 100 g/f, gas CO2 is send into the carbon aluminate solution to do decomposition to generate high-silicon aluminium hydroxide and carbon decomposition mother solution which circulately dissolving out carbon aluminate, the high-silicon aluminium hydroxide is processed by low-temp. dissolving, seed-decomposed decomposing and burning to produce quality sand-type aluminium oxide.

The invention provides a reactive distillation process device and method for synthesis of PODEn (polyoxymethylene dimethyl ethers). According to the method, industrial methylal for product chain termination and one or a mixture of two or more of trioxymethylene, paraformaldehyde and gas-phase formaldehyde for product chain propagation are taken as raw materials, no water exits in a reaction system, a PODEn mixed product with multiple degrees of polymerization is obtained through a reaction under the action of an acidic catalyst, a reaction product with the degree of polymerization higher than2 is recovered from the column bottom under the separation action of a PODEn reactive distillation reaction column, and DMM2 with low degree of polymerization and incompletely reacted methylal are recovered from the column top; a product recovered from the column bottom is separated by a production refinery column, a target product DMM3-5 is obtained, DMM2 with low degree of polymerization and DMM6-10 with high degree of polymerization are returned to the PODEn reactive distillation reaction column; incompletely reacted methylal is recycled as a raw material. By use of the characteristic of reactive distillation, excessive methylal is adopted in the reaction process, the conversion rate of formaldehyde substances is substantially increased, and the selectivity and the yield of DMM3-5 are increased.

The invention discloses a lead plaster desulfurization transforming method for waste lead-acid storage batteries, which belongs to the field of waste battery disposal. The method comprises the following steps: (1) the preparation of a lead plaster original sample: carrying out decomposition on waste lead-acid storage batteries, taking out a grid alloy, taking out lead plaster from a grid, removing impurities in the lead plaster, drying the lead plaster in an environment at a temperature of 80-90 DEG C, and grinding the lead plaster in a grinding machine for 10-30 min so as to obtain the lead plaster original sample with a particle size of 50-300 mu m; (2) the configuration of a desulfurization transforming agent: preparing a desulfurization transforming agent into transforming liquid, and heating the desulfurization transforming liquid to 20-90 DEG C by using a constant-temperature water bath bed; (3) full reaction: adding weighted lead plaster into the transforming liquid obtained in step (2), and stirring the obtained mixture, so that the mixture is fully reacted; and (4) after the transforming is completed, cooling and filtering the obtained product, and carrying out repeated washing and residue filtering on the obtained product for many times by using distilled water. According to the method, the desulfurization transforming process parameters of lead plaster in waste lead-acid storage batteries are determined, PbSO4 is effectively transformed into easily-decomposed PbCO3, the energy consumption is lowered, and the environmental pollution is reduced.

The invention relates to a mechanical manufacturing process, and in particular relates to a process of manufacturing and material processing of sliding bearings. The invention discloses a sliding bearing machining process, comprising the following steps: blanking, end surface chamfering, end surface grinding, punching, chamfering of an oil filling hole, quenching and tempering, centerless grinding, squeezing, and surface grinding. Through the sliding bearing machining process, a sliding bearing is used for lowering frictional resistance of machine running, and is high in machining precision. On the premise of satisfying the machining precision of the sliding bearing, the efficiency and the product quality can be improved by the machining process.

The invention provides an industrial preparation method of high-yield cinnamaldehyde. The method includes the following steps of: A, adding a solid catalyst and a water solution of polyethylene glycol 400 to a reaction vessel, then adding benzaldehyde; B, adding dropwisely 30 % to 50% by mass of an acetaldehyde water solution slowly with stirring, after the dropwisely adding, controlling the temperature from 25 DEG C to 30 DEG C for a reaction for 3 to 5 hours; C, performing washing after the completion of the reaction, and allowing the mixture to stand for delamination; and D, performing distillation after separating out an oil layer to obtain the cinnamaldehyde. The method in the invention is advantaged in operational simplicity, easiness in obtaining raw materials and in preparation of the catalyst, simple recovery, environmental friendliness, continuous operation, fast forward reaction speed compared with common processes, low probability of a side reaction, reduced unit energy consumption of a product as well as stable quality, high yield, and high purity of the produced cinnamaldehyde.

The pressure line, for example as a high-pressure fuel injection line, has a cold-worked connection (1) at the end of the line (16). The joint (1) is frustoconical and has a surrounding sealing surface on its enveloping surface, which is pressed against the connection part with a corresponding fit by means of a preload transmitted via the pressure shoulder (10). Wherein the outer surface of the pipe (16) encloses an angle greater than 90° with a surface of the pressure shoulder (10).

The invention relates to a method for extracting aluminum oxide from sodium-free desiliconized fly ash, which comprises the following steps of: taking dried sodium-free desiliconized fly ash, carrying out saturation calcium matching with limestone powder and/or slaking slag powder, sintering at 1330-1390 DEG C, controlling to cool the sintered material to obtain the self-pulverizing material, putting into a Na2CO3 solution to quickly dissolve out aluminum oxide, separating a solid from a liquid, extracting aluminum oxide according to the conventional method, and washing residues to obtain the low-sodium calcium-silicon slag. In the method, sodium-free desiliconized fly ash from which silicon dioxide is extracted and sodium oxide is removed is adopted as the raw material; the limestone sintering process can be used for extracting aluminum oxide, and low-sodium calcium-silicon slag can be obtained after extracting aluminum oxide; and both the aluminum oxide and the low-sodium calcium-silicon slag can be used as the raw materials of cement, thereby thoroughly eliminating secondary pollution.

The invention discloses a using method for a feed pulverizer with a separating screen. The using method comprises the following steps that A, during working, raw materials such as corns and bones are extruded and pulverized when entering a gap between coarse crushing rollers through a material inlet and then are extruded and pulverized again through the gap between the coarse crushing rollers; B, the coarse crushing rollers are adjusted: a control device controls a piston rod of an upper adjustment cylinder to extend to push one of the coarse crushing rollers to slide on a sliding rail so as to adjust the gap between the two coarse crushing rollers; C, fine crushing rollers are adjusted: the control device controls a piston rod of a lower adjustment cylinder to extend to push one of the fine crushing rollers to slide on the sliding rail so as to adjust a gap between the two fine crushing rollers; D, the separating screen vibrates to screen materials falling down from a material outlet of a stander, and fine materials are led out along a fine material outlet so as to be collected; a coarse material outlet in the side surface of the separating screen is used for introducing large-particle materials into the material inlet through a conveying belt for secondary pulverization. The using method disclosed by the invention is simple; a used product is simple in structure and convenient to use; the materials can be screened after being pulverized, so that secondary screening can be reduced.

The invention discloses a preparation method of wheat whole wheat flour. The preparation method of the wheat whole wheat flour comprises the following steps that 1) grinding is performed to obtain non-flour components of wheat bran and wheat germ with part of endosperm and flour; and 2) the non-flour components undergo micronization treatment and then are mixed with the flour components to preparethe whole wheat flour. According to the preparation method, through microwave drying, the water content of the non-flour components is reduced, the enzyme activity of the non-flour components are inactivated and reduced, the easy-to-crush property of the wheat bran is improved, the micronization efficiency and stability of the non-flour components are improved, the micronization energy consumption of the non-flour components is reduced, and the shelf life is prolonged; and meanwhile, through the process that the wheat bran, the wheat germ and the endosperm are properly separated and then micronization is performed, materials needing to be micronized are reduced, the preparation energy consumption of whole wheat flour is further reduced, excessive crushing of the endosperm is avoided, thenatural structure of the protein and the starch is kept, and the basis of the quality of the whole wheat product is laid.