55results about How to "Avoid temperature loss" patented technology

A finishing rolling device for manufacturing a thin magnesium strip (30)based on a coil (29)fed to the device includes a roll stand for accommodating at least two working rolls (32, 33) that define a roll gap. A first coiler(13) accommodates the coil and feeds the magnesium strip to the roll gap and a second coiler for winding up the magnesium strip after it passes through the roll gap. The first coiler is provided with a heating device and a hood arrangement (21,22)that shields the coil or the magnesium strip against heat radiation. The hood arrangement of the first coiler (13)features a coil passage opening(23) for introducing the coil (29)into the hood arrangement on its housing side that faces away from the roll stand.

The invention discloses an anticorrosion wear-resistant coated heat-insulation oil pipe composed of an oil pipe body, an anticorrosion wear-resistant layer inside the oil-pipe body, a heat insulation layer outside the oil pipe body, and an anticorrosion protecting layer outside the heat insulation layer. An inner pipe is fixedly nested in the oil pipe body, an outer heat insulation layer uniformly wraps the outer wall of the middle section of the oil pipe body, and an outer anticorrosion protecting layer wraps the outer wall of the heat insulation layer. Another heat insulation layer wraps a connecting hoop and an upper operating section and a lower operating section which are connected with the connecting hoop of the oil pipe body, and a heat-insulation layer protecting steel casing is mounted outside the referred heat insulation layer. By the anticorrosion wear-resistant coated heat-insulation oil pipe, loss of own temperature of crude oil when flowing from a well bottom to a wellhead is effectively reduced, and flow state of the crude oil in a wellhole is improved. The problems about an eccentric wear of rod pipes of the oil pipe, corrosion resistance inside the oil pipe, scaling, wax precipitation, corrosion resistance outside the oil pipe are solved, friction resistance among the rod pipes of a rod pumped well is reduced, finally, energy is saved, emission is reduced, damages to the rod pipes are reduced, downhole operation load is reduced, and exploration cost of oil is greatly reduced.

The invention discloses a direct steel making technique by reducing iron ore with gas, comprising: firstly, adding iron ore and prereducing mineral powder into an iron slag bath, dissolving the iron ore or the prereducing mineral powder into the slag, blowing reducing gas into the slag layer, reducing the slag containing FeO, and obtaining molten steel with carbon content less than 1.3%. CO generated in the reduction reaction is mainly used for secondary combustion to compensate heat energy needed by the reduction reaction, and the exhaust gas is used for prewarming and prereducing (the iron mineral is prereduced in very weak reducing atmosphere). The technique fully utilizes the features that the reducing gas will not carburize and siliconize the molten steel, and implements the production of molten steel from iron mineral only by one direct steel-smelting furnace. The technique of the invention has advantages of high yield, low energy consumption per ton steel, save of equipment andconstruction investment, sufficient simplification of physical distribution, and the technique avoids temperature loss of the molten iron in transport process, and easily implements continuous production and automation control.

The invention discloses a cutting device and a geomaterial direct shear apparatus and belongs to the technical field of cutters. The cutting device comprises a first tongs, a second tongs, a force arm, a fixed part, a stepping driving mechanism and a temperature adjusting device, wherein an accommodating space is formed between the first tongs and the second tongs; a to-be-cut object is divided into a first part and a second part and accommodated in the accommodating space to ensure that the first part is clamped by the first tongs and the second part is clamped by the second tongs; the temperature adjusting device is used for adjusting the temperature in the accommodating space; one end of the force arm is fixedly connected at the right side of the first tongs and the other end of the force arm is propped against the fixed part; and the stepping driving mechanism is used for providing a rightward acting force to the second tongs. The geomaterial direct shear apparatus comprises the cutting device. The cutting device has the advantages that the temperature of the to-be-cut object per se can be adjusted and the experimental study is carried out without changing the environment temperature, so that the operation is convenient and much energy can be saved.

A temperature maintenance and / or possible heating apparatus for long products, continuously cast and sheared to size by means of shearing means so as to define segments of bloom, said apparatus being disposed between a casting machine having a first casting line and a second casting line, and a rolling line disposed downstream of the casting machine in order to make long rolled metal products. The apparatus comprises a first furnace, a second furnace and a transit tunnel. The first furnace is provided with a first introduction rollerway. The second furnace is disposed upstream with respect to said first furnace, provided with a second introduction rollerway. The transit tunnel is located aligned with said first casting line, adjacent and parallel to the longitudinal extension of the second furnace and upstream of said first furnace.

The invention discloses a continuous steel making process for iron ore, which comprises the following steps: by adopting a direct carbon reduction mode of liquid iron oxide, adding the iron ore or pre-reduced ore powder into slag iron bath in advance, dissolving the iron ore or the pre-reduced ore powder to form slag, then using carbon to quickly reduce the liquid iron oxide to obtain liquid iron, next blowing oxygen at the other end of a furnace to remove the carbon so as to obtain molten steel, namely realizing iron mineral addition and molten steel production in the same furnace. CO produced in the reduction reaction is mainly used for secondary combustion to compensate the heat required by the reduction reaction, and the waste gas is used for pre-heating and pre-reducing (the iron mineral can be pre-reduced in weak reducing atmosphere). The process makes full use of characteristic of high direct carbon reduction speed of the liquid iron oxide, has high production rate and low ton steel-carbon consumption, saves equipment and capital construction investment, fully simplifies material flow, avoids temperature loss of the liquid iron during transportation, and is easy to realize continuous production and automatic control.

The invention relates to a constant temperature humidification device, comprising: a gas source inlet, the gas source inlet is arranged at the middle and lower part of one side of the constant temperature humidification device; a gas source outlet, the gas source outlet is located at the constant temperature humidity The middle and upper part of the other side of the humidification device; the constant temperature device, the constant temperature device is arranged at the bottom of the constant temperature humidification device; the power connection line, the power connection line is connected with the constant temperature device and runs through the constant temperature humidification device device. The advantage is that the constant temperature device warms the humidification device gently to avoid a sharp rise in temperature; the humidification device is equipped with a unique baffle structure, which can increase the time that the gas stays in the constant temperature humidification device and avoid heating. Humidity or temperature loss occurs in the flow process of warm and humidified gas.

The invention belongs to the field of pipeline descaling devices, and in particular relates to a cloth bag descaling pig, including a bag type pipe pig, a spring skeleton type pipe pig, an umbrella resistance plug and a pull rope. The spring skeleton type pipe pig is located in the bag Between the bag-type pipe pig and the umbrella-type resistance plug, the bag-type pipe-cleaner and the umbrella-type resistance plug are connected by a pull rope; Installed on the surface of the elastic cloth bag, the scraping nails are arranged in an axial line on the surface of the elastic cloth bag, the coil spring is located inside the elastic cloth bag, and the coil spring is wound at least one on the scraping nail when passing through each scraping nail ring, so that the scraping nail is fixed by the coil spring, the elastic filler is filled in the elastic cloth bag, and the two ends of the elastic cloth bag are sealed; compared with the prior art, the jet water pressure required by the present invention is smaller, and one Clean the dirt inside the pipe to avoid the temperature loss of the jet water.

The invention relates to a method for producing ultra-low phosphorous steel with double ladles. The process route includes molten iron pretreatment, converter smelting, LF slag washing, ladle double slag removal, LF furnace refining, secondary slagging, and molten steel casting; wherein the ladle Double slag removal is as follows: bake ladle B to above 1100°C, add lime; install a long nozzle at the bottom of ladle A, and the molten steel in ladle A flows into ladle B through the long nozzle, and ensure that the molten steel flowing into ladle B does not Contains the top slag in ladle A; add lime to cover the tank during tapping to ladle B. The process of the invention is simple, and the requirements for the phosphorus content in the converter tapping are not high, and the dephosphorization slag is completely removed by the ladle duplex method, and the temperature drop of the molten steel is small; the operation process is simple, the input cost is low, and ultra-low phosphorus can be realized Multi-furnace continuous casting production of steel.

DETAILED DESCRIPTION OF THE INVENTION that present invention provide a method for improving the inherent metallurgical quality of casting, A ferromagnetic alloy vacuum melting and casting short-process precision casting method for shortening investment casting process flow is disclosed, No dewaxing, no pouring, By adopting the process method of the combination of shell preparation and melting-casting molding and the integration of alloy melting-casting and casting molding, As that prepare mold shell is used as a melting and cast alloy crucible, The high frequency vacuum induction furnace is used to melt the ferromagnetic alloy in the mold shell to obtain the castings, which reduces the traditional investment casting production process, shortens the casting process and production cycle, andnot only improves the production efficiency, but also improves the quality of the castings and the yield of the castings.