19results about How to "Reduce temperature drop" patented technology

This invention relates to a method for producing thin-gauge low-density steel sheets using a lap-rolling process. The chemical composition of the steel sheet, by mass percentage, is: C: 0.70–1.20%, Si: 0.10–0.50%, Mn: 16.00–24.00%, P: ≤0.015%, S: ≤0.003%, Al: 7.00–10.00%, Ni: 4.00–8.00%, Nb+Ti: 0.02–0.20%, with the balance being iron and unavoidable impurities. The method includes the following steps: billet preparation, billet compositing, billet welding, compositing billet heating, compositing billet rolling, steel sheet separation, and compositing billet straightening. A low-density steel intermediate billet of a certain thickness and identical length and width is selected as the lap-rolling billet. After welding, thin-gauge low-density steel sheets with a thickness of 3–6 mm and a width of 2000–3500 mm are produced on a medium-thick plate mill. The steel plate has an Fe-Mn-Al-C series composition and a density of 6.90-7.10 g / cm³. 3 The finished steel plate has a yield strength ≥1000MPa, tensile strength ≥1100MPa, elongation ≥20%, and Charpy V impact energy ≥20J at -40℃. The rolled steel plate has good uniformity in shape, thickness tolerance ≤±0.25mm, and flatness ≤4mm / m.

The utility model discloses a circumferential auxiliary hot air heating smoking set. The circumferential auxiliary hot air heating smoking set comprises an electromagnetic coil assembly and a vacuum thermal insulation heating module. The electromagnetic coil assembly comprises a tower type electromagnetic coil (7) which is gradually thickened from top to bottom, an upper coil mounting plate (3) at the upper part of the electromagnetic coil, and a lower coil mounting plate (4) at the lower part of the electromagnetic coil; the vacuum thermal insulation heating module comprises a smoke cup (10) and a thermal insulation sleeve (8) on the periphery of the smoke cup (10), and a vacuum space is formed between the outer wall of the smoke cup (10) and the inner wall of the thermal insulation sleeve (8). A plurality of arc-shaped grooves (1001) and rectangular grooves (1002) are formed in the inner wall of the cigarette cup (10); an outer heating sheet (1401) is arranged in each arc-shaped groove (1001); an inner heating sheet (1402) is arranged in each rectangular groove (1002); the electromagnetic coil assembly is arranged on the periphery of the vacuum thermal insulation heating module in a sleeving mode.

This invention discloses a method for eliminating internal cracks in 304L stainless steel medium-thick plates used in nuclear power plants, comprising: controlling the chemical composition of molten steel to C: 0.01-0.03%, Si: 0.3-0.7%, Mn: 1.5-1.9%, Cr: 18.05-19.5%, Ni: 9.05-11%, P≤0.03%, S≤0.005%, N: 0.02-0.08%, and controlling the ferrite content in the steel to 2.8-7.7%; and continuously casting in the continuous casting process. The cooling water volume in the secondary cooling section is controlled at 0.55–0.65 L / kg. In the hot rolling process, the slab heating temperature is controlled at 1248℃–1258℃, and the holding time is controlled at 1.8–2.5 min / mm based on the slab thickness. The final rolling temperature is controlled above 1040℃. In the heat treatment process, the hot-rolled steel plate undergoes solution treatment, with the solution treatment temperature controlled at 1065–1075℃ and the holding time controlled at 1.5–2.0 min / mm based on the steel plate thickness. This invention controls the ferrite content within a reasonable range, reducing local ferrite aggregation, thereby effectively solving the cracking defects caused by local ferrite aggregation in the hot rolling process of 304L stainless steel medium-thick plates for nuclear power applications.

This utility model relates to the field of aluminum alloy production technology, specifically to an online degassing device for aluminum alloy production. The technical problem it aims to solve is to overcome the poor safety of slag removal in existing technologies. This is mainly achieved through the following technical solution: An online degassing device for aluminum alloy production includes a primary degassing chamber, a buffer chamber, and a secondary degassing chamber. The primary and secondary degassing chambers are equipped with heat-insulating covers on their tops. Each heat-insulating cover has multiple degassing devices. Each degassing device includes a ventilation component and two slag discharge components. The ventilation component includes a rotating motor, a rotating rod, and a rotating wheel, and is also connected to a gas supply device. The slag discharge components include a slag removal plate, a slag removal rod, and a slag removal drive component. Exhaust pipes are connected to the rear sides of the primary and secondary degassing chambers. The two degassing chambers ensure effective degassing. The degassing devices can safely remove slag without opening the covers and separate the slag promptly after removal. A buffer chamber is also provided to reduce the impact of temperature fluctuations.

This invention discloses a vacuuming structure, a semiconductor device manufacturing apparatus, and a manufacturing method thereof. The vacuuming structure, located at the bottom of a process chamber, includes: a vacuuming plate disposed below a heating plate within the process chamber, the outer edge of the vacuuming plate having an edge notch; a first bushing fitted onto the outer side of the vacuuming plate, the inner side of the first bushing having a first boss; and a rotating mechanism connected to the vacuuming plate, driving the vacuuming plate to rotate to adjust the opening of the vacuum port formed between the edge notch and its corresponding first boss. This invention not only reduces the temperature drop and temperature disturbance within the chamber caused by the vacuuming airflow, and improves temperature diffusion at the bottom of the heating plate, thereby enhancing the uniformity and stability of the temperature within the chamber and improving film formation quality, but also features a simple structure, eliminating the need for heating energy consumption, thus reducing production and maintenance costs.

This utility model provides a ladle cover with an operating hole insulation device, relating to the field of iron and steel metallurgical technology. It includes a ladle cover body and a first and second insulation cover mounted thereon. The insulation cover consists of an asbestos layer and an iron plate covering its outer surface, and is larger than the corresponding operating hole. It has sealing flanges on its edges to achieve airtight insulation when closed. The oxygen lance operating hole insulation cover is installed below the ladle cover via a hinged component, automatically opening and closing by gravity when the ladle is tilted. The diverting agent operating hole insulation cover is fixed by an arc-shaped hook device, and its opening and closing are controlled by external pulling. When closed, the locking part engages with the slot to lock it in place. This utility model and device significantly improve the ladle insulation effect, reduce the temperature drop of molten steel, reduce the heating time and energy consumption of the LF furnace, and shorten the smelting cycle.

The application discloses a method for rolling difficult-to-deform austenitic stainless steel by a double-furnace and -mandrel rolling mill, and relates to the technical field of iron and steel metallurgy. The method for rolling difficult-to-deform austenitic stainless steel by the double-furnace and -mandrel rolling mill optimizes the deformation distribution efficiency of the whole hot rolling process, reduces the temperature drop of the casting blank in the hot rolling process, and realizes balanced deformation in the whole process by reasonably distributing the deformation amount of the rough rolling area and the finishing rolling area. The strip steel passes through two rolling mills at the same time in single one-way rolling by adopting the double-furnace and -mandrel rolling mill, which is equivalent to completing two continuous deformations in a single pass, greatly improves the rolling efficiency, realizes rapid and stable rolling, and further reduces the deformation difficulty of the difficult-to-deform stainless steel. In addition, the on-line heating function of the hot coiling furnace makes the temperature of the edge of the strip steel stable in the appropriate hot working interval, optimizes the metal flow pattern, and reduces the risk of edge cracking from the root.

This application discloses an upper-layer cold water guiding device and a strip steel cooling system, belonging to the technical field of guiding equipment. The upper-layer cold water guiding device is used to guide the upper-layer cold water on both sides of the upper cooling manifold. The upper-layer cold water guiding device includes a first guiding element and a connecting mechanism. The first guiding element has a converging channel and a guiding channel that communicate with each other. The converging channel extends along a first direction and is located below one side of multiple upper cooling manifolds along a second direction. The guiding channel extends along the second direction and is located below the interval area between two adjacent upper cooling manifolds. The first direction and the second direction are perpendicular. The first outlet of the guiding channel is located at the end of the guiding channel away from the converging channel. The connecting mechanism connects the upper cooling manifold and the first guiding element.

The invention discloses a method for quickly baking an alloy by using converter flue gas. According to the layout that the high aluminum iron is laid on the outer ring, the silicon iron is laid on the bottom and the top, and the manganese metal is laid in the middle, the three kinds of alloy are added into a baking oven, converter smoke and air are introduced into a jacket outside the baking oven for low-temperature heating, and then the high aluminum iron, the silicon iron and the manganese metal are subjected to heat preservation; and then the air inlet amount is gradually reduced for medium-temperature heating, compressed air is introduced into the baking box for purging, the air inlet amount is continuously reduced for high-temperature heating, and the baked alloy is immediately fed into a steel ladle. According to the method, through the design of alloy laying, sectional type baking, compressed air blowing and drying of the alloy through low-temperature drainage, medium-temperature moisture removal and high-temperature drying, the alloy can be rapidly dried within 5-10 min, the problems that after the alloy material is added into molten steel, a large amount of heat is absorbed, and hydrogen is increased in the molten steel are solved, the average temperature of the molten steel in the steel ladle can be increased, and the service life of the molten steel is prolonged. And the tapping temperature is reduced, and the alloy yield is increased.

The invention relates to the technical field of waste gas treatment and waste heat recycling, and discloses a waste heat recycling system for treatment of packaging bag printing waste gas. The thermal incinerator is used for treating VOCs waste gas, the hot water heat exchanger is connected with high-temperature flue gas of the thermal incinerator in a heat exchange mode, and the circulating water pipe network is communicated with the water side of the hot water heat exchanger and used for conveying hot water to the hot end for printing equipment. A heat preservation structure is arranged on the periphery of the discharging pipe; the heat preservation structure comprises a heat preservation layer arranged on the outer side of the discharging pipe and an outer protection layer arranged on the outer side of the heat preservation layer, and the heat preservation layer comprises a heat preservation coating formed by coating a heat insulation and preservation material; the outer protective layer comprises a straight-section outer protective pipe and a bent-section outer protective pipe, and a sealing structure for connecting the straight-section outer protective pipe and the bent-section outer protective pipe is arranged between the straight-section outer protective pipe and the bent-section outer protective pipe.

The application provides a factory site molten iron transportation automatic covering control method and system, which enables the torpedo ladle to complete covering of the heat preservation cover when leaving a work station, keeps the covering state when entering and leaving a parking point, and performs uncovering operation before work of the work station after entering the work station, and through the control authority of the torpedo ladle heat preservation cover, the vehicle local system, remote system and work station all have the control function of opening and closing the heat preservation cover, the authorities of various operation sites are set to different priorities, when an abnormality occurs, the system alarms and prohibits work of the work station. The application reduces temperature drop in the molten iron transportation process and reduces carbon emission, has important role in energy saving and environmental protection, and has great application prospect.

The present application relates to the technical field of continuous casting process in steel metallurgy, in particular to a continuous casting ladle rotary table bottom argon blowing control device and a soft blowing inclusion removal method, which is provided with an argon blowing automatic butt joint mechanism and an argon blowing intelligent control switching device, realizes automatic butt joint of the continuous casting ladle rotary table ladle bottom argon blowing and automatic switching of the rotary arm argon blowing intelligent control mode, uses the existing ladle bottom blowing gas permeable brick to realize small flow static soft blowing in the pouring position of the continuous casting ladle rotary table and small flow dynamic soft blowing in the pouring process, completely replaces the existing technology LF refining later stage ladle soft blowing, overcomes the bottleneck problem of long LF refining time and the restriction of steelmaking production capacity improvement, improves the inclusion removal rate of the ladle bottom blowing gas permeable brick soft blowing, and improves the molten steel quality.

The utility model discloses a micro-fog dust removal device for steel belt rolling, which relates to the technical field of hot rolling production and comprises a U-shaped frame, a supporting plate is mounted on the upper end face of a horizontal section of the U-shaped frame, a filtering module is fixed on one side of the upper end of the supporting plate, an air compressor is fixed on the other side of the upper end face of the supporting plate, and a rotating support is mounted on one side of the U-shaped frame. A water spraying pipe is fixed to the rotating support, and atomizing nozzles are fixed to the water spraying pipe at equal intervals. According to the utility model, water is atomized and sprayed out through secondary utilization of waste water to replace original water spraying, so that the dust removal effect is better, the water spraying amount is greatly reduced, the temperature drop on the surface of a steel plate is greatly reduced, the dust accumulation phenomenon of rolling mill equipment can be effectively reduced, and the phenomenon that dust blocks of a rack fall off and are pressed into the steel plate is reduced; the surface quality of a steel plate is improved, abrasion of fine dust to mechanical operation parts such as bearings is relieved, the dust particle concentration is reduced, and the service life of field valve groups and electrical elements can be prolonged.

A refractory castable for creating a gradient insulation layer in the lining of a furnace or kiln, comprising the following raw materials and their wt% contents: aggregate with a particle size ≥1mm: 50-70%; fine powder with a particle size ≤0.088mm: 20-35%; fiber: 1-3%; dispersant: 0.05-0.1%; accelerator: 0.01-0.02%; binder: 5-8%; alumina foam not exceeding 20%; and water of 6-8% of the total weight of the above raw materials. Application method: The working layer in an industrial furnace or high-temperature vessel is divided into three layers from the inside out according to its thickness: Working Layer 1, Working Layer 2, and Working Layer 3, which are then cast separately. Preparation of Working Layer 1 castable; Preparation of Working Layer 2 castable; Preparation of Working Layer 3 castable. This invention, while ensuring a compressive strength of not less than 40MPa at 1500℃ for 3h, improves the thermal insulation performance by casting the furnace working lining into three layers: working layer one, working layer two, and working layer three, and by creating a thermal insulation gradient through the density gradient structure design of each layer of castable material. This means that the furnace surface temperature can be reduced by at least 35℃, and the heat transfer can be reduced by about 800MJ.

The utility model discloses a kind of diverting lifting heat preservation cover device and slab continuous casting heat preservation cutting system, belong to slab continuous casting equipment technical field.The device includes: steel frame, L-shaped guide slot including horizontal section and vertical section are provided on steel frame;Several sections are hingedly heat preservation cover in turn, can move on horizontal rail, and is equipped with the guide wheel cooperation with guide slot;Drive system includes mobile trolley for driving heat preservation cover horizontal movement, and by the winch device of steel rope drive last section heat preservation cover along guide slot lifting.Gathering, winch device drives heat preservation cover along L-shaped guide slot by horizontal state to divert to vertical state, compactly accomodate in steel frame side.The utility model is through the unique design of diverting lifting, realizes the effective heat preservation to steel billet in narrow space, reduces heat loss, saves energy, and small, and stable and reliable operation occupies space.

The utility model relates to atomization nozzle technical field especially atomization nozzle for gas atomization powder making, include: nozzle body, set up the air inlet channel in the nozzle body on this nozzle body, the nozzle body bottom sets up the atomization area of concave cavity shape, the flow guide pipe is installed at the nozzle body top and is set up for conveying the flow guide channel of metal liquid, the liquid outlet of flow guide pipe and the gas outlet of air inlet channel all are located in the atomization area, the air inlet channel includes the high pressure chamber of intercommunication air inlet and with the low pressure chamber of high pressure chamber intercommunication and the section area less than high pressure chamber, the throat is set up between high pressure chamber and low pressure chamber junction, the low pressure chamber sets up as horizontal direction, the through -hole inner wall for installing flow guide pipe of the nozzle body still sets up the heat insulation groove, for solving the technical problem that the powder collection rate is low and the life is low because of the nozzle bearing height of the gas atomization nozzle of prior art generally existing.

The utility model relates to a heat preservation device for a submersed nozzle of a continuous casting machine, and belongs to the technical field of continuous casting equipment in the metallurgical industry. According to the technical scheme, a plurality of U-shaped water gap storage grooves (10) are formed in the top face (13) of a box body, openings of the U-shaped grooves face a box door (6), the width of the U-shaped grooves is smaller than the diameter of the tops of water gaps (17) and larger than the diameter of the middles of the water gaps, and the height of the inner space of the box body is larger than the length of the water gaps; thermal insulation materials are arranged on the inner wall of the box body, and roller assemblies are arranged on the lower portion of the box body bottom face (4). The device has the beneficial effects that the temperature drop of the water gap in the storage process can be effectively reduced, and the cold steel formation phenomenon is avoided; the U-shaped structure of the box body movable door and the water gap storage groove facilitates taking and storage of the water gap; operation is convenient, and labor intensity of workers is reduced; the device can freely move in a workshop to meet the requirements of different stations; the heat preservation box body is closed, so that the scalding risk of staff can be reduced; the water gap storage groove and the box body are integrated, and water gaps are prevented from falling or colliding.

The utility model discloses an outlet dustproof device for rolling mill relates to rolling production technical field. The device includes the dust collecting cover of arrangement in the rolling mill export roll way top, and the dust collecting cover is connected the wet method front filter jar through the first suction pipe, and the wet method front filter jar is connected the cloth bag filter through the second suction pipe, and finally forms the negative pressure dust extraction flow path through the fan. The wet method front filter jar is equipped with annular fairing, atomizing nozzle and demister, and the dust collecting cover and first suction pipe cover insulating layer, and the second suction pipe adopts the reducing pipe. Through the collaborative structure of "dust collecting cover collection wet method front filter jar pretreatment cloth bag filter fine filtration", the problem of high temperature, uneven particle, strong viscosity of rolling dust is solved pertinently, realizes dust efficient interception and protects filter bag, reduces equipment maintenance frequency.

The utility model belongs to the technical field of solar heating devices, and provides a household solar central heating device which comprises a solar water heater, a covering device and a heat preservation device. The solar water heater comprises a supporting frame, a water storage barrel and a solar tube array plate, the solar tube array plate is composed of a transfer tube and a heat collection tube, the other end of each heat collection tube is provided with a heat preservation device, and each heat preservation device comprises a sealing heating ring, a heater and a heating wire. The sealing heating ring is connected to the end of the heat collecting pipe in a sleeving mode. The heater is used for heating the heat collecting pipe; according to the scheme, the heat supply device has active heat preservation and active heating functions, and heat preservation of the heat supply device can be actively achieved in the using process; during covering, more than 90% of radiation heat dissipation of the solar tube array plate can be reduced, and the temperature drop amplitude at night is reduced by 60% compared with that of a traditional system.