468results about How to "Improve refining effect" patented technology

The invention relates to a high-conductivity aluminum alloy material for a cable and a preparation method thereof. The aluminum alloy material comprises the following components in percentage by weight: 0.25-0.80 percent of iron element, 0.02-0.15 percent of boron element, 0.1-1.5 percent of rare earth element and the balance of aluminum and inevitable impurities. The aluminum alloy is formed by adding an aluminum alloy intermediate alloy, an aluminum-boron alloy and an aluminum-rare earth intermediate alloy into an aluminum ingot of which the purity is more than 99.80 percent by weight and carrying out a casting process and annealing treatment on the mixture. Compared with a common electric aluminum conductor, the prepared aluminum alloy conductor has more excellent conductive performance and the conductivity reaching or exceeding 62.5 percent IACS (International Annealed Copper Standard); the aluminum alloy conductor treated by using a special process has excellent flexibility and creep resistance; and compared with a common electric aluminum conductor, the prepared aluminum alloy material used as a cable extrusion insulating lead core is more energy-saving and safer.

A substrate for a solar cell having a metal substrate, a first insulating oxide film formed on the metal substrate by anodic oxidation, and a second insulating film, wherein the first insulating oxide film has pores and the pores are sealed with the second insulating film at a sealing ratio of 5 to 80%.

The invention provides a production method of fructus monordicae extract with over 60% of mogroside V content. In the method, the fresh momordica grosvenori is subjected to the following technique processes: smashing, saccharification, extraction by water, concentration, sedimentation and centrifugation, ion exchange resin refining, macroporous resin refining, concentration, aluminum oxide refining, concentration, spray drying and finishing product. The method can produce high-quality fructus monordicae extract products, reduce material loss, shorten period of production, increase product yield, lower production cost, and is suitable for industrial production. The mogroside V content in the fructus monordicae extract produced by the method is more than or equal to 60%; the fructus monordicae extract has high product purity, single composition, pure white color, good color and taste, fresh and cool sweet taste like that of sugar, simultaneously overcomes the technical problem for industrial production of the high-content and high-quality fructus monordicae extract, and successfully realizes large-scale production.

The invention relates to a refining agent for aluminum and aluminum alloy. The refining agent is characterized by mainly comprising the following components in percentage by mass: 30 to 85 percent of NaCl, 5 to 40 percent of Na2SiF6, 5 to 40 percent of Na2SO4, 2 to 20 percent of CaF2 and 0.5 to 5 percent of C6C16; and the refining agent also can comprise one or more of CaMg(CO3)2, Na3AlF6, Na2S2O3 and NaF. The potassium-free refining agent provided by the invention has good slag forming performance, strong gas and impurity removing capability and low cost; and the aluminum ash produced by refining the aluminum and the aluminum alloy through the refining agent can realize recycle.

The invention relates to an Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal and a preparation method thereof. The components of the aluminum-based brazing filler metal are 7 to 13 percent by weight of Si, 5 to 11 percent by weight of Cu, 4 to 11 percent by weight of Zn, 1 to 6 percent by weight of Sn, 1 to 3 percent by weight of Ni, 0.02 to 0.3 percent by weight of Ce, 0.01 to 0.1 percent by weight of Sr, 0.01 to 0.2 percent by weight of Zr and the balance of Al. The process flow for preparing the aluminum-based brazing filler metal is that: pure aluminum is added into a graphite crucible and covered by flux for aluminum under the condition of 800 DEG C to 900 DEG C, and slag is removed after melting; the aluminum-based intermediate alloy of high-melting point elements and flux for aluminum are added at the same time, and melting, stirring and slag removal are carried out; the aluminum-based intermediate alloy of low-melting point elements is added under the protection of nitrogen, and melting and stirring are carried out; the mixture of argon and hexachloroethane is added to carry out refining, and standing and slag removal are carried out; the intermediate alloy of trace elements is added, and melting and stirring are carried out; secondary refining and slag removal are carried out; and under the protection of nitrogen, casting formation is carried out. The Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal has the advantages of low melting point, high strength, high toughness, high corrosion-resistant property and good wetting property and spreadability.

The invention discloses a pulp-grinding method for improving fibre brooming, comprising the following steps: adding rigid filler to the pulp before grinding, and grinding after mixing the rigid filler and the pulp fibre, wherein the additive amount of the rigid filler accounts for 1%-30% of the total mass of the pulp; the rigid filler is any one or the mixture of several types of PCC, GCC, Talc, titanium pigment and bentonite of filler grade; and the rigid filler can also be fibrous mineral fibre. The adoption of the pulp-grinding method can improve devillicate brooming degree of the fibre, improve paper strength and interweaving, or can improve the ash content of paper and reduce fibre consumption under the condition of maintaining a considerable paper strength, and can reduce production cost and reduce the grinding energy consumption while protecting the environment.

The invention relates to a method and a system for refining crude brine. The method comprises the following steps of: performing pre-reaction; pressurizing and dissolving gas; pretreating; performing post reaction; filtering by using a membrane; and filtering off residual slag particles by using a membrane filter to obtain the refined brine. By the method and the system for refining crude brine, under the condition of not introducing new impurities, various metal impurity ions are efficiently flocculated and precipitated, so that problems of great mineral salt impurity fluctuation and overproof Fe and Al ions are solved, the high quality of the finished brine product and the high-efficiency and normal operation of subsequent ion-exchange membrane electrolysis can be ensured, and the aim that mineral salt replaces sea salt to serve as chlor-alkali electrolysis raw salt is fulfilled; moreover, brine sludge emission and treatment cost can be obviously reduced, and the method and the system have good emission reduction effect and good environment-friendly property.

The invention relates to a rice bran oil industrialized refining method and a device for implementing the method. The invention effectively satisfies the rice bran oil refining demands in the rice bran oil industrialized refining. The method is implemented by degumming with water, dewaxing, primary alkali refining, secondary alkali refining, cleaning with water, drying and decolorization, as well as deacidification and deodorization in turn. The device is characterized in that a first crude oil temporary storing tank is connected with a fourth oil pump sequentially through a first oil pump, a hydration kettle, a second oil pump, a pre-cooling tank, a third oil pump and a crystallizing tank, which are connected in series; the fourth oil pump is connected with a first oil refining caldron sequentially through a first frame filtering machine, a second crude oil temporary storing tank and a fifth oil pump; the first oil refining caldron is connected with the water-cleaning caldron sequentially through a sixth oil pump, a second oil refining caldron and a seventh oil pump; the water-cleaning caldron is connected with a decolorization oil pump, a second frame filtering machine, a decolorization oil tank and a deacidification and deodorization kettle through a drying and decolorization kettle; and the deacidification and deodorization kettle is connected with a polishing filter through a shielding pump and a condenser. The invention has the advantages of low production cost, high efficiency, good effect, capability in industrialized mass production and great economic and social benefit.

The invention belongs to the technical field of steelmaking and refining, and discloses a ladle refining slag modifier, a preparation method and a slag modifying method. The slag modifier comprises the following chemical components in percentage by mass: 30 to 60 percent of CaO, 30 to 60 percent of Al2O3, 2 to 10 percent of MgO2, 2 to 10 percent of B2O3, and less than 8 percent of impurities. The slag modifying method using the slag modifier comprises that: the slag modifier is hoisted to the front of a refining furnace after a steelmaking furnace discharges steels, and then is directly fed into ladles, or the slag modifier can also be fed into the furnace along with other slags at a refining station; the components of modifying slag are determined according to the ladle residue amount and components, desulfuration amount and steel deoxidation product amount; and the modifying slag for controlling the ladle slag comprises the following components according to the adding amount: 48 to 54 percent of CaO, 26 to 32 percent of Al2O3, 6 to 8 percent of MgO, 2 to 4 percent of B2O3, and 0 to 8 percent of SiO2, wherein the modifying slag is better if the content of the SiO2 is lower. The slag modifier has the capabilities of quickly manufacturing the slag, improving desulfuration and deoxidation of the refining slag and accommodating and absorbing deoxidation products, and is simple to prepare and convenient to store, transport and use.

The invention relates to a method for purifying industrial silicon through external refining, which comprises the following steps of: continuously introducing refined gas to a ladle before a submerged arc furnace releases a silicon melt to the ladle; then releasing the silicon melt into the ladle, heating in the ladle, controlling the temperature of the melt within a certain scope, adding a refining agent into the ladle for slag refining, adjusting the introducing flow rate, the pressure and the like of the refined gas along with the continuous increase of the quantity of the silicon melt in the ladle for external refining; and after the completion of the external refining, carrying out slag silicon separation and then pouring, i.e. the purification of the industrial silicon through the external refining is finished. Through the external refining process, a majority of metal impurities containing Al, Ca, Ti and Na and a part of B, P, S and C and other non-metallic impurities in the industrial silicon melt can be removed, and meanwhile, the effective components can be controlled for the subsequent purification of the industrial silicon, and high-quality raw materials are provided for solar grade silicon prepared by a metallurgical method. The method has the characteristics of full utilization, energy resource conservation, high production efficiency, less infrastructure investment, no environment pollution and the like.

The invention belongs to the field of steelmaking, and particularly discloses a fluorine-free slag modifier for preventing a ladle refining device from adhering slag, a preparation method and a using method. The slag modifier consists of active lime, bauxite and boric anhydride; and the slag modifier comprises the following chemical components in percentage by mass: 75 to 85 percent of CaO, 10 to 20 percent of Al2O3, 5 to 15 percent of B2O3, 0 to 8 percent of MgO, and the balance of impurities, wherein SiO2 is less than 7.0 percent, H2O is less than 0.05 percent, and the total amount of sulfur and phosphor is less than 0.01 percent. During use, in order to prevent a ladle from adhering the slag, the slag modifier is fed into the ladle in the later period of discharging steel from a steelmaking furnace, and in order to prevent an RH dip pipe or a CAS-OB dip cover and the like from dipping into the ladle device to adhere slag, the slag modifier is fed at a refining station. The slag modifier can effectively control the refining device from slag adhesion and improve the service life of a fireproof material, is favorable for reducing the contents of the sulfur, oxygen and impurities in the steel, and is simple to prepare and convenient to store, transport and use.

The present invention discloses a hydrocracking process for raising refined diesel oil quality, and is mainly characterized by that the poor diesel oil is undergone the process of hydrodesulfurization treatment, then the desulfurized refined diesel oil is mixed with the refined hydrocracked raw material oil, and fed into the hydrocracking reactor, and the sulfur and nitrogen contents in the mixed oil of the refined diesel oil and refined hydrocracked raw material oil must meet the feeding requirements of hydrocracking reactor. As compared with existent technology said invention can utilize hydrocracking equipment to raise the quality of refined poor diesel oil and can obtain high-quality clean fuel.

The invention relates to a method for determining the amount of a slagging material and deoxidized alloy added into an LF refining furnace by use of a reference heat method. The method comprises the following steps: controlling the amount of slags discharged from a rotary furnace during a refining process, wherein the amount of the added synthetic slags is the same during a steel discharging process of the rotary furnace according to the same type of steel heat number; (1) acquiring data and building a database by use of a computer; and (2) using the database for determining the amount of the slagging material and the deoxidized alloy added into this type of steel LF refining furnace when the acquired data of a certain type of steel in the database is accumulated to be not less than 400 heat number. The method disclosed by the invention comprises steps of acquiring operation data, building the database and using the computer to process the data rapidly and accurately; the reference heat method absolutely can be used for replacing the existing slagging method for manually determining the amount of the added slagging material and has the advantages of solving the instability of manual determination, optimizing the refining effect, stabilizing the quality of refined liquid steel and promoting standardized operation.

The present invention belongs to the technical field of medicine, and relates to a tenofovir disoproxil fumarate synthesis method, wherein (R)-1,2-propanediol and carbonate are adopted as raw materials, and condensation, etherification, hydrolysis, esterification salification and other steps are performed to prepare the finished product. According to the present invention, the process improving and the reaction intermediate treatment are performed so as to easily achieve the reactions in the subsequent steps and the separation and purification, improve the yield and the corresponding purity of the target product, and obtain the tenofovir disoproxil fumarate meeting the medical standard.

The invention discloses a method for controlling electroslag melting casting by an added transient magnetic field. The method includes adding a transient magnetic field to a melting end of an electroslag remelting mother electrode, a liquid slag tank and a metal melting tank so that the transient magnetic field acts on large metal molten drops which are generated by initial melting at the tail end of the electrode and are converging to become big; under joint action of alternating lorentz force and pressure waves generated by the transient magnetic field, dispersing the metal molten drops in a burst manner into small metal molten drop groups, and randomly dispersing the small metal molten drop groups into the liquid slag tank to sufficiently contact with liquid slag after passing the liquid slag tank; after washing, enabling included foreign substances and impurities in the small metal molten drops to enter the liquid slag quickly, slowly settling and converging the foreign substances and impurities into the metal melting tank below the liquid slag tank, and finally crystallizing and solidifying to form solidified cast ingots. The invention further provides an electroslag melting casting device. By adding the transient magnetic field during electroslag melting casting and fining the molten drops by the aid of unique electromagnetic effect of the transient magnetic field, the purposes of improving refining efficiency, fining crystalline grains and reducing segregation of cast ingots are achieved, and industrial application value is realized.

The present invention provides a magnesium alloy rare earth compound flux and its production method. Its composition includes (wt%) 40-55% of magnesium chloride, 15-25% of potassium chloride, 12-25% of sodium chloride, 1-6% of calcium chloride, 5-15% of calcium fluoride, 1-8% of barium chloride and 3-10% of rare earth activator. Said ivnention flux has high activity, proper melting point, density, viscosity and surface tension, and can greatly raise mechanical property of magnesium alloy and corrosion resistance.