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289results about How to "Reduce corrosion" patented technology

Composite connection method for radiator type products

The invention provides a composite connection method for radiator type products and relates to the technical field of welding methods. The technical problems that a radiator inner cavity is poor in sealing performance, and a friction stir welding tool is high in requirement are solved. The method includes the following steps that a radiator comprises a base plate and a cover plate, the base plateis provided with a process step, and a weld joint position is cleaned completely; the process step of a whole weld joint is coated with a synthesis gluing agent for metal, the cover plate is arrangedfor covering, pressure is applied, glue is made solidified, and adhesion between the cover plate and the base plate is firm; friction stir welding is performed on the butt joint face of the base plateand the cover plate, sealing welding on the weld joint is completed, and a friction stir welding and gluing composition connection joint is formed. By means of the composite connection method for theradiator type products, the sealing performance and the pressure bearing capacity of radiator water channels can be improved, the cross sectional area of the water channels and the distribution density of the water channels are improved, tool requirements are lowered, the radiating performance is improved, the structure is simple, and operation is easy and convenient.
Owner:北京世佳博科技集团有限公司

Beneficiation method for rubidium-containing feldspar quarry

The invention provides a beneficiation method for rubidium-containing feldspar quarry. The method comprises the following steps of firstly, sequentially performing grinding and strong magnetic separation on raw feldspar quarry to obtain zinnwaldite and floatation feeding ores; secondly, adding a flotation reagent into the floatation feeding ores for flotation to obtain floatation foam a and flotation tailings b, wherein the flotation reagent comprises an inhibitor and a zwitterion collecting agent; thirdly, performing concentration, reagent removal and desliming on flotation tailings a , subsequently adjusting pH of ore pulp of materials, and adding the zwitterion collecting agent for separating and carrying out flotation on feldspar and quartz to obtain floatation foam b and the flotation tailings b; fourthly, combining the zinnwaldite in the second step with the floatation foam a in the third step to obtain beneficiation rubidium concentrate. According to the beneficiation method provided by the invention, rubidium minerals occurring in mica and potassium feldspar (amazon stone) are recovered by a magnetic separation-flotation combined technology, so that the recovery rate of rubidium ores is improved; in addition, usable quartz and feldspar products are obtained, and the comprehensive utilization rate is high.
Owner:ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD

Novel rare-earth electrolytic bath

ActiveCN105256337ALower cell voltageReduce corrosionElectrodesSteel barElectrolyte
The invention relates to a novel rare-earth electrolytic bath. A gap is reserved in the center of each anode, and the bottom surface of each anode is a concave surface being concave from the periphery towards the center. A cathode is correspondingly arranged below each anode. The cathodes are buried in a protruding high-temperature-resisting material. The top of each cathode is an arc convex surface and protrudes out of the high-temperature insulating material. An electrical insulating layer is arranged between the high-temperature-resisting material and each cathode. A metal groove is formed between every two cathodes, and the high-temperature-resisting material is concave downwards to form the metal grooves. A cathode steel bar is located at the bottom of each cathode and connected with the cathode. The space between every two adjacent cathode steel bars is filled with a graphite block. An electrical insulating layer is arranged between each graphite block and the corresponding cathode steel bar. A feeder is arranged on the top of a bath body. According to the novel rare-earth electrolytic bath, the convex surfaces of the cathodes are higher than the high-temperature insulating layers, so that a high-temperature zone of the electrolytic bath is moved upwards. Through the metal grooves designed for the electrolytic bath, the contact area of metal and an electrolyte is reduced, re-dissolution of the metal is restrained, and the current efficiency is improved. The shapes of the anodes of the electrolytic bath are beneficial for discharging of anode bubbles.
Owner:CENT SOUTH UNIV

Additive composition for polymer, preparation method of additive composition and flame-retardant thermoplastic polymer molding material by using additive composition

The invention discloses an additive composition for a polymer, a preparation method of the additive composition and a flame-retardant thermoplastic polymer molding material by using the additive composition. The additive composition is prepared from the following components in percentage by weight: 80-99.99 percent of a component A which is dialkyl hypophosphite with a structure as shown in a formula (I), 0-20 percent of a component B which is alkyl phosphite with a structure as shown in a formula (II), and 0-0.9 percent of a component C which is phosphite with a structure as shown in a formula (III), wherein the component B and the component C are not 0 percent by weight at the same time, and the total amount of the components A, B and C is 100 percent by weight all the time. The additive is applied to a polymer, so that the corrosion degree of a flame-retardant polymer on screws of a mixing combination device can be greatly reduced, equipment processing cost can be reduced, energy and labor loss caused by frequently changing screws in the processing process can be reduced, and the whiteness of a polymer component obtained through extrusion molding is superior to that of a conventional dialkyl hypophosphite modified polymer component.
Owner:ZHUHAI WANTONG CHEM

Graphene-containing lead alloy for lead storage battery grids, and preparation method thereof

The invention discloses a graphene-containing lead alloy for lead storage battery grids. The graphene-containing lead alloy includes 0.015-0.15% of graphene, 1.0-1.5% of tin, 0.02-0.04% of aluminum, 0.05-0.1% of calcium and 98.21-98.915% of lead. A preparation method of the graphene-containing lead alloy comprises the following steps: putting 2/3 of lead in a lead melting pot, and heating to 680DEG C in order to melt lead; adding graphene to molten lead; adding pure tin strips and pure aluminum strips 20min later, and stirring and mixing for above 0.5h; adding lead sheath packaged calcium, pressing calcium into the bottom of the molten lead by using a bell jar with the bottom provided with leakage holes, slowly stirring and mixing for above 0.5h when the molten lead does not bubble, adding the residual lead into the lead melting pot, continuously stirring after the lead is completely molten, and carrying out ingot casting 1h later. The preparation method has the advantages of simplicity, reliability, simple structure of a used device, and low cost; and the grids made by using the lead alloy prepared through the method have strong creep and corrosion resistance, and can meet deep cycle and heavy current charge and discharge requirements.
Owner:SINO INNOV SEMICON (PKU) CO LTD

Method using tributyl phosphate resin for fractional extraction to separate zirconium and hafnium

InactiveCN104046777ASolve emulsification problemsReduce corrosionProcess efficiency improvementScrapChemistry
The invention relates to a method using tributyl phosphate resin for fractional extraction to separate zirconium and hafnium; the tributyl phosphate resin is used as an extraction agent, and the zirconium and hafnium are extracted and separated by use of a box-countercurrent mode; the method comprises the following sections: 1), acidification section, to be more specific, using the tributyl phosphate resin as the extraction agent, putting an extraction phase and a mixed acid solution into a box-type extraction tank for countercurrent acidification; (2) extraction section, to be more specific, putting the acidified extraction phase and a material liquid containing the zirconium and hafnium into the box-type extraction tank for countercurrent acidification; (3) washing section, to be more specific, performing reverse-phase washing on the extraction phase with the zirconium being extracted; (4) back extraction section, to be more specific, performing reverse-phase back extraction on the washed extraction phase; and (5) impurity removal section, to be more specific, performing reverse-phase impurity removal on the back extracted extraction phase, using an impurity removal liquid for washing, wherein effluent is used as waste for emissions, and an outflow extraction phase is recycled. The method has the advantages of large extraction phase capacity, high production capacity, no emulsification, low product cost, stable operation, and high product quality.
Owner:有研资源环境技术研究院(北京)有限公司

External embedded type plant protection unmanned aerial vehicle medicine box

The invention discloses an external embedded type plant protection unmanned aerial vehicle medicine box. The medicine box comprises a medicine box body and a U-shaped fixing plate, wave-resistant plates are arranged in the medicine box body, the inner walls of two sides of the medicine box body each are provided with a sliding groove, and a sliding plate matched with the corresponding sliding groove is arranged in the corresponding sliding groove; the inner side of each sliding plate is fixedly connected with two sides of the corresponding wave-resistant plate, a liquid outlet is arranged in the middle of the lower wall of the medicine box body, and the right wall of the medicine box body is provided with a horizontal liquid inlet; two ends of the upper side of the medicine box body each are provided with an insertion plate, and the inner sides of the two insertion plates are fixedly connected with the outer side of the medicine box body; the upper side of the medicine box body is provided with the U-shaped fixing plate, and the inner sides of two walls of the U-shaped fixing plate each are provided with an insertion groove matched with the corresponding insertion plate; the insertion plates are located in the insertion grooves, a square groove is arranged in the middle of the bottom of each insertion groove, and a clamping block matched with the corresponding square groove isarranged in the corresponding square groove; and the inner side of each clamping block is provided with a spring, and two ends of each spring are separately and fixedly connected with the bottom of the corresponding square groove and the inner side of the corresponding clamping block. The medicine box disclosed by the invention can be firmly fixed on an unmanned aerial vehicle.
Owner:倪惠芳

Discharged flue gas self-heating technology of wet flue gas desulfurization and desulfuration purified flue gas self-heating device

InactiveCN103591599AIncrease discharge temperatureReduce corrosionLighting and heating apparatusPhysicsFlue gas
The invention discloses a discharged flue gas self-heating technology of wet flue gas desulfurization. Original flue gas is divided into the thionizer entering flue gas and the bypass flue gas. After the thionizer entering flue gas is washed by spraying a doctor solution in a thionizer, purified flue gas is formed and enters a straight discharging chimney. The bypass flue gas is conveyed into the straight discharging chimney. In the straight discharging chimney, the purified flue gas and the bypass flue gas are fully mixed and then discharged into the atmosphere. Mixed flue gas meets the requirement for environment-protection discharging, meanwhile, the bypass flue gas exchanges heat with the purified flue gas, so that the temperature of the mixed flue gas is raised, and the discharging temperature of the mixed flue gas is controlled to reach more than 70 DEG C. The invention further discloses a desulfuration purified flue gas self-heating device. In order to overcome the defects of a GGH, heat flue gas is used for directly heating the purified flue gas, and the heat flue gas and the purified flue gas are mixed and then discharged. The technology is simple, resistance is small, the GGH does not need to be arranged, the maintenance workload of the device is small, and therefore the wet flue gas desulfurization device is more simple and more practical in technology and meets the requirement for long-time efficient operation.
Owner:SHANGHAI UNIV
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