37results about How to "Shorten process operation time" patented technology

The invention relates to a Fe and mixed rare earth intermediate alloy for adding rare earth into steel and a preparation method for the Fe and mixed rare earth intermediate alloy. The alloy is prepared by processing the following raw materials in percentage by weight: 70-95 percent of pure iron and 5-30 percent of mixed rare earth metal. The preparation method comprises the following steps of: performing vacuum melting in a vacuum medium frequency induction furnace crucible, wherein the vacuum degree is less than or equal to 0.1 Pa; and fully deoxidizing by using SiCaBa, and adding mixed rare earth metal into pure molten iron in the crucible when the temperature reaches 1,550-1,650 DEG C, wherein the melting and mixing time is 1-10 minutes. The invention has the advantages that: when the Fe and mixed rare earth intermediate alloy is used in a steel ladle, the rare earth adding effect is good, the rare earth adding form is novel and the rare earth can be added efficiently, the method is easy and convenient to operate, and equipment and operating workers are not added; the yield of the rare earth is greatly improved; the rare earth is uniformly distributed in molten steel; the rare earth adding amount is greatly reduced; the rare earth adding operating environment is effectively improved; the steel melting production efficiency is improved; the quality of the rare earth steel products is improved; and the comprehensive cost is reduced.

The invention relates to casting process, in particular to a process method for producing large size sculpture through resin sand removable-flask moulding. The method comprises the following technological processes: model receiving, cutting, strengthening, model placing and gating system designing, netty steel frame welding, modeling, mode dissembling, mold assembling, strengthening, pouring, sand cleaning and the like. The method is mainly characterized in that steel frames with different sizes are welded according to the sizes of casting models, and the profile-followed steel frames can be welded according to the different shapes of casting models, so that the steel frames can be reused, and the consumption of resin sand can be greatly reduced during modeling due to the welded profile-followed steel frames; the layer surface of sand is thinner, and the operation time of the whole process is shortened, so that the raw materials are saved, the production efficiency is improved, and the whole production cost is greatly reduced.

The invention relates to a Fe-Ce intermediate alloy for adding rare earth into steel and a preparation method for the Fe-Ce intermediate alloy. The alloy is prepared by processing raw materials with the weight percentages that: 70-95 percent of pure iron and 5-30 percent of metal Ce. The preparation method comprises the following steps of: performing vacuum melting in a vacuum medium frequency induction furnace crucible, wherein the vacuum degree is less than or equal to 0.1 Pa; and fully deoxidizing by using SiCaBa, and adding metal Ce into pure molten iron in the crucible when the temperature reaches 1550-1650 DEG C, wherein the melting and mixing time is 1-10 minutes. The invention has the advantages that: when the Fe-Ce intermediate alloy is used in a steel ladle, the rare earth adding effect is good, the rare earth adding form is novel and the rare earth can be added efficiently, the method is easy and convenient to operate, and equipment and operating workers are not added; the yield of the rare earth is greatly improved; the rare earth is uniformly distributed in molten steel; the rare earth adding amount is greatly reduced; the rare earth adding operating environment is effectively improved; the steel melting production efficiency is improved; the quality of the rare earth steel products is improved; and the comprehensive cost is reduced.

The invention discloses environment-friendly multi-purpose descaling liquid. The environment-friendly multi-purpose descaling liquid is used for removing water scales, oil scales, dirt and urine scales, and the key is that the environment-friendly multi-purpose descaling liquid is prepared from the following raw materials in percentage by weight: 2-7% of trisodium phosphate, 8-15% of phosphoric acid, 2-7% of polyethylene glycol, 3-8% of urea, 2-7% of industrial salt, 7-13% of a polymer composite synergistic active agent, 1-5% of ethylene diamine tetraacetic acid, 3-8% of fatty alcohol polyoxyethylene ether and the balance of water. The multi-purpose descaling liquid can rapidly remove the scales and has the advantages of good descaling effect, no irritation and no harm to human bodies, safety, no toxicity and no environmental pollution.

An embodiment of the present invention provides a through-electrode filling method comprising: a step of immersing a through-electrode including a via in a copper plating solution having a leveler anda copper electrolyte; a first current applying step of applying a first current to coat an upper side surface of a via of the through-electrode in the leveler; a second current applying step of applying a second current, the magnitude of which is lower than that of the first current, to form a plating film of the copper electrolyte on the bottom of the via; and a third current applying step of applying a third current, the magnitude of which is higher than that of the first current, to fill with the copper electrolyte in a part from a surface of the plating film of the copper electrolyte to an opening of the via.

The invention discloses a lentivirus purification process. The lentivirus purification process comprises the following steps: S1, clarifying and filtering a lentivirus-containing cell culture to obtain a lentivirus-containing cell culture supernatant; S2, concentrating the supernatant obtained in the step S1 by 8-15 times by adopting a hollow fiber ultrafiltration system; S3, washing and filtering the concentrated solution obtained in the step S2 by at least 10 volumes by using a first buffer solution; S4, carrying out nuclease Benzonase enzyme digestion treatment on the concentrated solution washed and filtered in the step S3, and controlling the treatment temperature to be 25-37 DEG C and the treatment time to be 30-60 minutes; S5, washing and filtering the concentrated solution in the step S4 by at least 10 volumes through a hollow fiber ultrafiltration system so as to remove nuclease Benzonase and nucleic acid fragments, and then adding a second buffer solution into the concentrated solution, wherein the second buffer solution contains Buffer for maintaining the stability of lentivirus particles; and S6, concentrating the lentiviral vector concentrated solution obtained in the step S5 to 5*10<7> TU/mL or above to obtain the purified lentivirus. The lentivirus purification process disclosed by the invention can obviously improve the recovery rate of the lentivirus and is suitable for large-scale production.

A method for preparing gutta-percha from eucommia bark comprises the steps of: first cleaning the eucommia bark with clear water; drying until water content of the eucommia bark is less than 5%; crushing the eucommia bark into particles of 10-100 mum; putting the particles into an extracting tank; adding a single solvent petroleum ether for ultrasonic countercurrent extraction; then conducting stage filtering; and finally extracting gutta-percha by a low-temperature gutta-percha crystal precipitation method. The invention has advantages of simple process, little pollution, high yield and low cost; a micro-grinding pretreatment technology and the ultrasonic countercurrent extraction are employed to realize ideal effects with extraction rate higher than 95% and the gutta-percha content reaching 99.9%.

The invention relates to a cleaning agent for an industrial copper pipe. The cleaning agent consists of the following components in percentage by mass: 8-22 percent of glycerin monostearate, 10-25 percent of cocamidopropyl betaine, 8-25 percent of methyl acetate, 10-20 percent of 1, 3-dihydroxytoluene-5, 5-dimethylhydantolin, 6-15 percent of N-acylsarcosine sodium, 8-12 percent of polyvinyl butyral, 5-15 percent of coconut oil fatty acid and the balance of deionized water. The cleaning agent is wide in deoiling and decontamination range, capable of being separated from greasy dirt and good in cleaning effect; the cleaning agent can be used for cleaning dirt, such as lubricating oil, metal working fluid and grinding fluid on the surface of the industrial copper pipe; the cleaning agent is high in cleaning capability, high in speed, capable of being reused and free of pollution and has antirust capability. The cleaning agent can be used for rapidly removing dirt on the surface of the industrial copper pipe, cannot corrode the industrial copper pipe, can ensure that the surface of the cleaned industrial copper pipe is smooth and bright, has the cleaning efficiency being greater than 99 percent and has a remarkable effect.

The invention belongs to the technical field of carbon material preparation and provides a device and a method for rapidly preparing high-yield activated carbon by coupling of a pressure pump with microwaves. The device comprises a programmed controller, a feed unit, a reaction furnace, a pressure pump unit, a microwave heating unit, an explosive spraying and cooling unit and a pyrolysis gas treating unit. Friction and collision of raw material molecules are caused by the microwaves, reaction activation energy is reduced, and the process operation time is shortened greatly. Retention time of volatile matter is prolonged by pressing of the pressure pump, the volatile matter is promoted to be deposited on surface of semi-coke, and accordingly, yield of solid carbon is increased; condensationpolymerization of tar is also promoted by pressing, and production of the tar is reduced substantially or avoided. Besides, pyrolysis gas can be produced from inside of the raw materials by the aid of microwave heating, pyrolysis gas molecules retain in the raw material molecules under the pressing action to play a role of in-situ self-template and shuttle back and forth freely in the raw materials non-directionally to substantially promote pore development of the activated carbon, the instantaneous popcorn effect is beneficial to secondary pore forming of the pyrolysis gas, and the specificsurface area of a carbon material is increased.

The invention discloses a fully automatic clamping device for tires, which includes a clamping mechanism and an electrical control system. The clamping mechanism includes a plurality of clamping block groups, an annular clamping seat for fixing all the clamping block groups, and The clamping and fixing base is fixedly connected to the bottom plate, and the clamping and fixing base is fixedly installed on the tire building machine through the bottom plate, and each clamping block group includes clamping tiles and drives the clamping tiles to move in a straight line The given tile driving device; the electrical control system connects all the tile driving devices and independently controls the movement of each tile driving device. Each clamping tile of the present invention is independently controlled by the controller, so that the whole device has the characteristics of coaxial self-adaptation, flexible adjustment, good self-adaptability, and greatly improves the production quality and production efficiency of tires.

The invention relates to an automobile production pipe surface cleaning treatment agent. The automobile production pipe surface cleaning treatment agent is prepared from, by mass percent, 8%-22% of turpentine, 10%-25% of oxidizing agent thiourea, 8%-25% of sodium lignin sulfonate, 10%-20% of hexadecyl dimethyl benzyl ammonium chloride, 6%-15% of trisodium phosphate, 8%-12% of butyl cellosolve, 5%-15% of benzyltriphenylphosphonium bromide and the balance deionized water. The automobile production pipe surface cleaning treatment agent is wide in oil and dirt removal range, capable of being separated from oil and dirt and good in cleaning effect; lubrication oil, metal processing liquid, grinding liquid and other dirt on the surface of an automobile production pipe can be cleaned away; the cleaning capacity is high, and the speed is high; and the automobile production pipe surface cleaning treatment agent can be repeatedly used and free of pollution and has antirust capacity. Cleaning liquid can fast remove the dirt on the surface of the automobile production pipe, and the automobile production pipe cannot be corroded.