59results about How to "Slow down the melting rate" patented technology

The invention discloses a summer-time face excavation construction method for a high and cold permafrost ultra-long highway tunnel. The summer-time face excavation construction method comprises the steps of tunnel portal excavation and side slope and heading slope protection, shallow-buried tunnel portal permafrost follow-pipe shed construction, shallow-buried tunnel trunk section permafrost excavation and supporting and frozen-earth-section tunnel trunk lining. Before a frozen-earth-section tunnel portal is excavated, a heat-preservation blind drain and a water retaining drive part are arranged in the outside 5 m away from the top of a heading slope and 2 m away from the tops of side slopes in a 'front-cut rear-drive' mode. A positive benching tunneling method is adopted at a frozen-earth tunnel portal section to perform layered and sectioned excavation and supporting, a tunnel portal is pre-reinforced by adopting a large advancing pipe shed, a mining method is adopted at a hidden hole shallow-buried section for construction, a three-bench seven-step excavation method is adopted for excavation, C30 low-temperature early-strength steel fiber sprayed concrete and primary-formwork-lining C30 low-temperature early-strength concrete are adopted to form a double-layer preliminary-supporting structure, and C45 concrete is adopted for secondary formwork lining. By means of the summer-time face excavation construction method, the hole forming difficulty problem can be solved, construction cost can be reduced, a construction period can be shortened, and the like.

The invention discloses a method for controlling the direction of a solidification structure of a cast ingot through electricity conductive crystallizer electroslag remelting and belongs to the technical field of metallurgy. The method comprises the steps that (1) a slag material with the high conductivity is prepared and then baked; (2) the filling rate and the insertion depth of an electrode are determined, and a base wad, an arc striking agent and an electricity conductive crystallizer are right placed; and (3) a path of an electric current flowing through a power source, the consumable electrode, the slag material, a bottom water tank and the power source is selected, and arc striking, material charging and slag melting are conducted; after the slag material is melted down, a remelting electric current and the remelting voltage are set; the path of the electric current is set through closing of a switch in the electroslag remelting process, the distribution ratio of electric currents flowing through the crystallizer and the bottom water tank is controlled, the shape and the depth of a metallic molten pool are changed, and the direction of the solidification structure is controlled; and in the later period of remelting, electricity is cut off after electroslag remelting feeding operation, cooling is conducted, and the remelted cast ingot is obtained. According to the method for controlling the direction of the solidification structure of the cast ingot through electricity conductive crystallizer electroslag remelting, a slag system with the high conductivity distribution ratio is adopted, and the tendency of axial crystallization of the solidification structure of the cast ingot is improved; and the crystallization direction of the solidification structure of the cast ingot is controlled in the remelting process, and the prepared cast ingot has good surface quality.

The invention provides continuous casting mold flux for high-carbon cutting mold steel. The continuous casting mold flux comprises the following chemical components in percentage by weight: 28.0-29.0% of CaO, 2-5% of MgO, 31.0-33.0% of SiO2, 4-5% of Al2O3, 8.0-9.0% of Na2O, 9-10% of F, 1.5-2.5% of LiO2, 2.0-2.8% of elemental carbon F.c and the balance of ash content I.L; and the alkalinity R of the mold flux is 0.80-0.95%. The continuous casting mold flux has the beneficial effects that by adjusting the components of the mold flux affecting production characteristics of the cutting mold steel and particularly by adjusting the contents of the flux, F, LiO2 and elemental carbon, the melting point of the mold flux is lowered so as to achieve stable dynamic balance between the melting speed and the inflow speed of the mold flux during the continuous casting process, thus improving the fluidity and crystallization speed of the mold flux during the casting process of the cutting mold steel, lowering the melting speed of the mold flux, realizing stable continuous casting production of the cutting mold steel, ensuring lubricating property of an initial shell of a plate blank in a crystallizer, preventing adhesion or bleed-out accidents caused by slag breakage, and realizing stable and smooth production of the high-carbon cutting mold steel.

The invention provides a refrigerating ice bag, a refrigerant and a preparation method of the refrigerant, and belongs to the technical field of refrigerating articles. The refrigerating ice bag comprises the refrigerant and a bag body. The refrigerant is sealed in the bag body. The refrigerant can be frozen into solid to be used by cooling the refrigerating ice bag. The refrigerant in the refrigerating ice bag has a high cold storage function and is slow in chilling, the initial cooling efficiency is high, and the temperature can be lowered quickly. The cooling effect lasts for a long time, the problem that the refrigerating ice bag is frequently replaced can be greatly reduced, and use cost of the refrigerating ice bag is lowered.

The invention provides a preparation method of a chromium-zirconium-copper alloy. The preparation method comprises the following steps copper foil is coated with chromium powder and then is placed inthe center area of the bottom of a crucible; a copper rod is placed in the high-temperature area of the middle of the crucible; a copper plate is arranged between the copper foil and the copper rod; copper particles are placed in the low-temperature area at the upper part of the crucible; copper smelting is carried out, and chromium smelting is carried out after copper substances in the crucible are completely molten; after all the chromium powder is molten, sponge zirconium coated with the copper foil and raw materials of trace elements are added into the crucible for smelting, so that an alloy liquid is obtained; and the alloy liquid is casted to obtain the chromium-zirconium-copper alloy. The invention further provides a chromium-zirconium-copper alloy prepared by the method.

The invention provides a steel plate containing Sn and Sb and resistant to corrosion of sulfuric acid and chloride ions and a manufacturing method of the steel plate. The steel plate comprises the following components: 0.050-0.079% of C; 0.20% to 0.45% of Si; 0.60% to 1.00% of Mn; less than or equal to 0.025% of P; s < = 0.0040%; 0.90% to 1.10% of Cr; ni: 0.05 to 0.30%; 0.20% to 0.40% of Cu; the content of Als is 0.025% to 0.050%; 0.035% to 0.050% of Ti; 0.08 to 0.14 percent of Sb; 0.10% to 0.15% of Sn; n < = 0.0040%; and the balance of Fe and inevitable inclusions. And the Sn-Sb-containing sulfuric acid and chloride ion corrosion-resistant steel plate is formed by matching with key field control processes such as a plate blank heating process and the like. The surface quality and the cold bending performance are good; the yield strength is not less than 345MPa, the tensile strength is not less than 470MPa, and the ductility is not less than 25%.

The invention discloses sandwich fragrant and crisp ice cream. The sandwich fragrant and crisp ice cream is made of whole milk powder, light cream, galactooligosaccharides, fruits, chocolate, sorbitol, crisp rice, cashew nuts, lactic acid bacteria, vegetable oil, sodium carboxymethyl celluloses, konjac glucomannan, sucrose fatty acid ester, zymosan, 1,3-di-stearate-2-triolein and edible essence. The sandwich fragrant and crisp ice cream has the advantages that the sandwich fragrant and crisp ice cream has obvious layers, the chocolate is coated and hung on outer layers, inner layers are crisp rice, cashew nut and chocolate sandwiches, accordingly, the sandwich fragrant and crisp ice cream has distinct taste and contains comprehensive nutrition, and the nutrition is easy to absorb; upper and lower surfaces of the crisp rice and the cashew nuts are sealed by the corresponding chocolate, always keep crisp and have fragrant and sweet taste; probiotics substances can be generated by means of fermentation by the aid of the lactic acid bacteria, the sandwich fragrant and crisp ice cream contains the abundant lactic acid bacteria, accordingly, fragrance can be improved, and the sandwich fragrant and crisp ice cream is sour, sweet and delicious; the melting speed can be reduced, the sandwich fragrant and crisp ice cream can be eaten after the temperature of the sandwich fragrant and crisp ice cream is slightly increased, accordingly, irritation on intestines and stomachs can be reduced, and the comprehensive nutrition can be supplemented; the chocolate contains diversified natural components, reverse frosting can be inhibited, the sandwich fragrant and crisp ice cream has crisp taste, the shelf life can be obviously prolonged, and economic income can be increased.

The invention discloses a method and a device for controlling seed crystal melting degree through a gas flow in a single crystal casting process. In order to prevent full melting of seed crystals, slow smelting of the seed crystals is realized by utilizing heat brought by a gas flow but not the heat of a heater using the method at a seed crystal smelting stage of a single crystal silicon ingot casting process by controlling the variation in protective gas flow, so that the seed crystal smelting degree is accurately controlled, incomplete smelting of bottom seed crystals is guaranteed, and a single crystal silicon ingot is normally produced.

The invention discloses a melting technology suitable for producing a nodulizing agent by using a 3-ton intermediate frequency furnace. The melting technology for the nodulizing agent includes the steps of 1, silicone and iron are added into the bottom of the 3-ton medium-frequency furnace, then magnesium ingots are added, and waste steel is added, wherein the waste steel includes two types, firstly the blocky waste steel is added into the intermediate frequency furnace, and then Re and Ca components are added; 2, the current of the 3-ton medium-frequency furnace is controlled to be 450-750A, then the strip-shaped waste steel is added into the intermediate frequency furnace to be melted, the temperature in the intermediate frequency furnace is controlled to be 1250-1270 DEG C, and the furnace burden is stirred uniformly after being completely melted; and 3, the current is reduced to be 0A, then the furnace is tilted, the molten iron is poured into a nodulizing agent mold, when the temperature is lowered to 1150 DEG C, a nodulizing agent lifting hook is inserted into the nodulizing agent solution, then the nodulizing agent solution is air-cooled to room temperature, and when the nodulizing agent is cooled until the surface becomes dark red, the nodulizing agent can be lifted to a nodulizing agent stacking site by using a travelling crane.

The invention relates to the technical field of cleaning brushes, in particular to a cleaning brush capable of cleaning solid kitchen appliances, which comprises a driving structure, a reversing structure, an angle adjusting structure, a cleaning structure, a storage structure, a reset structure and a heat exchange chamber. The driving structure is released, the reset structure enables an accommodating cavity in the driving structure to be enlarged, the reversing structure is regulated, the storage structure is conducted with the driving structure, and the storage structure generates negativepressure, so that the sweeps are more convenient to store in the storage structure, hot water can be conveniently controlled to enter the driving structure from the storage structure through the driving structure; reversing structure is then adjusted, the driving structure is communicated with the heat exchange chamber, and the driving structure is pressed, so that hot water is discharged to the heat exchange chamber from the driving structure, the temperature of the storage structure is increased, small-area fallen ice blocks in the storage groove of the refrigerator can be conveniently melted through the storage structure, ice crumbs are more convenient to clean, the melting speed of frozen food is decreased, and then electric energy is greatly saved.

An oxygenating and water spraying live fish transport case system of the present invention comprises a live fish transport case and an oxygenation system. In the live fish transport case, a case body (1) is covered by a case cover (2), a clapboard (6) is connected with the case body (1), and ice (7) is arranged on a lower supporting plate (13). A storage battery (9) and a switch (14) are arranged on an upper supporting plate (8), a water pipe (3) penetrates the clapboard (6) to be connected with a submersible pump (12), and the submersible pump (12) is in the water (5) under the lower supporting plate (13). A pollution absorption pad (10) is lain flatly at the bottom of the case body (1), and a filter net (11) is in a hole at the lower part of the clapboard (6) and in the water (5). In the oxygenation system, a liquid oxygen tank (26) is connected with an oxygenating cover plate (24) via an oxygen pipe (23) and an inflation/deflation valve (25). The oxygenating and water spraying live fish transport case system of the present invention is used to oxygenate the live fish transport case, and increases the oxygen in the water by spraying water, thereby improving a live fish transport environment.

The invention provides a metal-based composite coating crust breaking hammer. The metal-based composite coating crust breaking hammer is prepared by the following steps: firstly, preparing high-temperature-resistant corrosion-resistant metal-based composite coating powder; secondly, making a crust breaking hammer substrate; and thirdly, performing surface cladding treatment on the crust breaking hammer substrate by adopting a plasma surfacing process, so that the high-temperature-resistant corrosion-resistant metal-based composite coating powder is molten on the surface of the substrate and issolidified quickly, and a surface coating which is metallurgically bonded with the surface of the crust breaking hammer substrate is formed on the surface of the crust breaking hammer substrate. Themetal-based composite coating crust breaking hammer overcomes the disadvantages in the prior art; the plasma surfacing process facilitates mechanization and automation, can realize large-batch stableproduction, and does not pollute the environment basically; the process is high in heating speed and high in heat efficiency; and the bonding strength of the coating and the substrate is high, and thecoating ion density is high, so that the performance and the quality of the substrate are enhanced.

The invention provides composite packaging film and a preparation method thereof, relates to the technical field of low-temperature packaging, and aims to slow down the melting speed of ice cream at ahigh room temperature. A method for preparing the composite packaging film comprises steps of: performing formation of an electroplated aluminum layer on the upper surface of a paper substrate layer,performing formation of a phase-change heat-absorbing layer on the surface, opposite to the surface of the paper substrate layer, of the electroplated aluminum layer, and wrapping the exterior of thepaper substrate layer on which the electroplated aluminum layer and phase-change heat-absorbing layer are formed with protective film. The composite packaging film is prepared by using the preparation method of the composite packaging film. The composite packaging film and preparation method thereof are applied to package of cryo-preservation food.

The invention discloses a high aluminum strengthened cover glass composition which includes the following components in percentage by mole: SiO2: 49-75%, Al2O3: 1-25%, Na2O: 5-18%, K2O: 0-16%, MgO: 2-16%, CaO: 0-6%, BaO: 0-1%, SrO: 0-3%, ZrO2: 0-5%. According to the modified high aluminum strengthened cover glass provided by the invention, the surface pressure stress is at least 700 MPa, the thickness of the pressure stress layer is 36 micrometers or above, and a ring-on-ring (ROR) pressure resistant value of 500 MPa or above is obtained; compared with the strengthened cover glass in the prior art, the high aluminum strengthened cover glass provided by the invention has the advantages that the surface pressure stress is greatly improved, and the ROR pressure resistant value is increased from 2500 MPa to 5000 MPa, so that the quality of the glass is greatly improved, and the service life of the glass is prolonged.

The invention discloses a preparation method of ultra-pure G102Cr18Mo stainless bearing steel, and belongs to the technical field of metal smelting. According to the method, firstly, base metal needed for preparing the ultra-pure G102Cr18Mo stainless bearing steel is obtained through intermediate frequency furnace smelting, LF furnace refining, sedation treatment and die casting, the oxygen content ranges from 20 ppm to 30 ppm, and conditions are created for ultra-pure stainless steel bearing steel smelting; then, the base metal is subjected to forging and scaling treatment and then is put into a vacuum induction furnace to be melted and refined, and no alloy element is added in the vacuum induction treatment process; a consumable electrode subjected to vacuum induction melting is subjected to vacuum consumable remelting twice, and the G102Cr18Mo stainless bearing steel with extremely high purity can be obtained.

The invention discloses a valve steel continuous casting crystallizer functional protection material. The material comprises the following raw material components including, by weight, 36.0-42.0% of pre-melt materials, 14.0-17.0% of wollastonite, 9.0-11.0% of fine glass powder, 3.0-5.0% of lithium carbonate, 7.0-9.0% of fluorite, 2.0-4.0% of sodium fluoride, 3.0-5.0% of cryolite, 10.0-12.0% of graphite carbon, 2.0-3.5% of carbon black and 2.0-3.5% of a binder. According to the valve steel continuous casting crystallizer functional protection material, the thermal insulation effect and the melting effect are guaranteed, furthermore, pulling break, slag inclusion and depression of casting blanks are effectively prevented, and the non-cleaning rate of the surfaces of the obtained casting blanks reaches up above 98%.

The invention relates to a cooling and anti-condensation heat preservation packaging bag for a quick-frozen food. The packaging bag comprises a developing cooling layer, a water and air absorbing layer, a bacteriostatic bionic layer and an efficient heat preservation layer, the developing cooling layer, the water and air absorbing layer and the bacteriostatic bionic layer are tightly attached together from outside to inside, after the three layers are co-extruded, and the bacteriostatic bionic layer is extruded on the efficient heat preservation layer at intervals from inside to outside to form a heat preservation bag; the color developing and cooling layer comprises a one-way water-permeable and air-permeable fiber film and a cooling and color developing coating coated on the film, and the cooling and color developing coating is arranged on the inner side; and the water and air absorbing layer is formed by loading three-dimensional multi-metal ion framework adsorption crystals on a semi-dehydrated-activated-bacterial cellulose membrane. The inner layer of the packaging heat preservation bag is made of the one-way water-permeable and air-permeable fiber membrane and has the water-encountering color-developing and cooling functions, the bottom layer of the color-developing membrane is coated with the cooling particles, when dissolved water encounters the cooling particles, the environment temperature is lowered, the dissolving speed is delayed, and meanwhile bacterial colony growth is inhibited at low temperature.

The invention provides an ice compress fixing bag for an orthopedics department. The ice compress fixing bag comprises a fixing bag main body, a bag structure capable of adding and containing ice, a temperature display fixed bag structure, an insulated outer bag structure, an ice-taking blood-activating scoop structure, a fixed constraint band, a secondary magic tape, a containing bag, a movable constraint band, an adjustable buckle, a primary magic tape, a fixed block, a binding rope, a protection pad and a buffer pad, wherein the bag structure capable of adding and containing ice is arrangedinside the temperature display fixed bag structure; the temperature display fixed bag structure is bonded to the middle position of the positive surface of the fixing bag main body. According to thearrangement of an ice-containing bag, an observation strip, a fixing plate, an ice inlet pipe and a leakage-proof cap, cooling ice is conveniently added into the ice-containing bag, and convenience isprovided for treatment use; due to the arrangement of an electronic thermometer, the temperature change condition of the ice compress bag is conveniently checked, and a basis is provided for treatment; due to the arrangement of the scoop, ice blocks can be conveniently added into the ice-containing bag, and the operating efficiency is improved.

The invention discloses a device enabling aldosterone blood specimens to be stored and transported conveniently. The device comprises a square shell, a first square supporting frame body, a storing unit, a pressing unit and a close covering unit. The device is good in heat preserving effect, the thawing speed of ice blocks in an ice and water mixture can be effectively slowed down, then frequencyof replacing the ice and water mixture can be effectively reduced, then the device is convenient to use, the aldosterone blood specimens of the same positions and sampled at different time can be stored in a classified manner, the aldosterone blood specimens of the different positions and sampled at different time can be prevented from being mixed together, detectors can classify and detect the blood specimens conveniently, thus the aldosterone blood specimens are convenient to take and store, the aldosterone blood specimens stored in a storing groove can be prevented from waggling back and forth, the phenomenon of bumping can be avoided, the ice and water mixture in the square shell can be prevented from overflowing, water can be prevented from entering the aldosterone blood specimens stored in the storing groove, then deterioration of the aldosterone blood specimens is avoided, and the influence on the detecting result is eradicated.

The invention discloses a method for improving the yield of an iron casting product inoculation spheroidizing agent, and belongs to the technical field of in-ladle inoculation spheroidizing of iron casting products. Covering chips, a nucleating agent and a spheroidizing agent are placed on the downstream side of the bottom of the steel ladle; and during tapping, the smelting furnace taps iron at the maximum furnace turning speed, after tapping is completed, the steel ladle is hoisted to rotate to remove slag from the backwater side of the steel ladle, and after the pouring temperature is reached, the steel ladle is hoisted for pouring. By optimizing the steel ladle structure, adjusting the position and height of the ladle bottom dam and changing the components and dosage of the covering agent, the yield of the ladle bottom spheroidizing agent is stabilized at 85% or above and can reach 90% at most, the quality risk caused by oxidation slag inclusion of the spheroidizing agent is greatly reduced, the slag inclusion defect of a casting is reduced, the molten iron inoculation quality is improved, and the production cost is reduced. And the molten iron quality is effectively improved.

The invention provides a self-sinking type slag filtering device of a slag conveyor. The self-sinking type slag filtering device mainly comprises a bottom plate (1), a front end plate and a rear end plate (3), wherein the front end plate and the rear end plate (3) are fixedly connected to the front end and the rear end of the bottom plate (1) respectively. The self-sinking type slag filtering device further comprises a grid located above the bottom plate (1) and between the front end plate and the rear end plate (3). The grid comprises a grid support (8) and a plurality of vertical strips (4). The vertical strips (4) are independently and movably installed in positioning grooves of the grid support (8). The side faces of the vertical strips (4) are coated with a fireproof and slag bonding preventing coating. By means of the device for slag filtering, molten iron can be filtered through gaps of the grid, the slag filtering efficiency is high, and the effect is good. Meanwhile, after the lower ends of the vertical strips (4) are molten, the vertical strips (4) can automatically sink under the effect of gravity and impact vibration, and it is ensured that the bottoms of the vertical strips (4) make contact with the bottom plate (1) all the time. The slag filtering effect is stable, and reliability is high. The slag filtering device does not need to be frequently replaced, and the maintaining workload is small.

The invention discloses a movable aquatic product refrigeration box. The movable aquatic product refrigeration box comprises a top cover, a clamping block, a buckle, a movable wheel, antiskid grooves,a box body, a pull rod, a lifting handle and a groove; the antiskid grooves integrated with the box body are uniformly distributed on the two outer side surfaces of the box body; the antiskid groovesare of rectangular structures; four and more antiskid grooves are distributed at equal intervals; and one side of the top of the box body is in hinged connection with the same side of the top cover.In the movable aquatic product refrigeration box, a thermal insulation plate with an adjustable height is positioned in the top cover of the refrigeration box; and through height adjustment of the thermal insulation plate, aquatic products occupy a corresponding volume of the relative box body, so that volatilization of ice blocks can be effectively reduced, the melting speed of the ice blocks isslowed down, long-time dipping of the aquatic products in water is prevented, and the quality of the aquatic products is not influenced.

The invention relates to an aluminum alloy fire-resistant window mounting structure. The aluminum alloy fire-resistant window mounting structure is characterized in that steel beams are arranged inside side inner frames and a mullion inner frame, the inside and the outside of each steel beam are filled with fireproof poured materials, structural components are filled with fireproof poured materials, side outer frames and a mullion outer frame are filled with fireproof poured materials, and fastening strips are filled with fireproof poured materials. The aluminum alloy fire-resistant window mounting structure has the advantages that various inner frames, various outer frames, the various structural components and the various fastening strips are filled with the fireproof poured materials, fireproof materials are arranged at two ends of glass, the corresponding steel beams are arranged in the inner frames, and accordingly the mechanical strength of an aluminum alloy window can be improved; mounting components are divided into limit structures and load bearing structures, and accordingly the aluminum alloy fire-resistant window mounting structure is convenient to mount and detach andis the novel aluminum alloy fire-resistant window with the fire resistance of approximately 1 hour.