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

The invention discloses a heating device for a Hopkinson pressure bar test, which comprises a movable supporting platform, a tubular heating furnace and an electric control box. The tubular heating furnace is mounted on a sliding plate of the movable supporting platform. Two groups of sliding rails and a plurality of fixed sliding beads are arranged on the upper surface of the sliding plate. Two alundum tubes are symmetrically sleeved at two ends of a heat-resistant steel tube. Heat-resistant bricks are respectively built around the external surfaces of the joints of the two alundum tubes and the heat-resistant steel tube. The heat-resistant bricks are provided with through holes for mounting silicon carbide rods. Insulating linings are sleeved on the external surfaces of a hearth and the heat-resistant bricks. Positions where inner cavities of the insulating linings correspond to the through holes on the heat-resistant bricks are all provided with mounting holes of the silicon carbide rods. Aluminum silicate fibrous carpets package the external surfaces of the insulating linings. A furnace shell is packaged on the external surfaces of the aluminum silicate fibrous carpets and the insulating linings. A base is fixed on the furnace shell. Two heat-insulating covers are respectively mounted in the hearth from hearths at two ends, and end cover bolts are fixed at two ends of the furnace shell. In the invention, the tubular heating furnace can move in the up-and-down direction, the leftward-rightward direction and the frontward-backward direction of the platform, and the heating device has the characteristics of good heat-insulating performance and convenience in repair.

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 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 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.

The invention discloses a novel high-temperature steel slag modifier and a modification pretreatment process, and belongs to the technical field of steel slag modification. The novel high-temperaturesteel slag modifier comprises a substance containing elemental silicon and a substance containing elemental carbon, the content of the elemental silicon in the substance containing the elemental silicon is more than or equal to 60%, and the content of the elemental carbon in the substance containing the elemental carbon is more than or equal to 80%. The invention further discloses the novel high-temperature steel slag modification pretreatment process which comprises the following steps 1) adding the substance containing the elemental carbon and the substance containing the elemental silicon into a slag tank in advance; 2) when a converter is deslagging, adding the substance containing the elemental silicon into the slag tank at the same time; 3) blowing nitrogen into a material after deslagging, and collecting generated dust at the same time; and 4) carrying out hot stuffy treatment on steel slag subjected to nitrogen blowing treatment in the step 3). The novel high-temperature steelslag modifier and the modification pretreatment process can effectively improve the stability and grindability of the steel slag and improve the recovery rate of the slag and steel.

The invention relates to a device for extracting metals or metal compounds from a material containing the metal or the metal compound, with a furnace vessel (2), with a first inlet for supplying the material, a first outlet (10) for discharging exhaust gas, one or more electrodes (1) for melting and/or reducing the material supplied, which protrude into the furnace vessel, with a bottom electrode(5) formed as a cathode, a space (16) provided in the region of the slag tap hole (12) and serving as a settling zone, with an electromagnet or permanent magnet (6), which is placed in the furnace vessel in such a way that a DC current flow produced in the furnace vessel is crossed by the magnetic field, and also a tap hole (8) for removing the molten metal or the metal compound and an overflow or tap hole (12) for the slag.

The invention discloses a central air conditioning system and a control method for a super high-rise building. The Central air conditioning system and the control method for the super high-rise building comprises a low-area air conditioning system, a high-area air conditioning system, an ultra high-area conditioning system and a highest-area air conditioning system, wherein the low-area air conditioning system comprises a general air-condition cold water main engine, a low-area chilled water circulating pump and low-area users, the high-area air conditioning system comprises a high-area heat exchanger, a high-area chilled water circulating pump and high-area users, the ultra high-area conditioning system comprises a ultra high-area heat exchanger, a ultra high-area chilled water circulating pump and ultra high-area users, the highest-area conditioning system comprises a highest-area heat exchanger, a highest-area chilled water circulating pump and highest-area users. By the adoption of a closed system, chilled water of a common loading capacity cold water main engine is guaranteed to be provided to each terminal with only once heat transfer to reduce twice or three times heat transfer and the fact that a large number of air-condition main engine energy consumption under the premise of meeting the requirement of terminal humiture is saved is achieved, the central air conditioning system and the control method for the super high-rise building meets the requirement of energy-saving and cost-reducing environment. The central air conditioning system and the control method for the super high-rise building is reliable in project and good in energy-saving effect.

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.

The invention relates to the technical field of shampoo beds, in particular to a tube-on-sheet heat exchanger type shampoo bed. The tube-on-sheet heat exchanger type shampoo bed comprises a shampoo bed body, a hot water tank, a heating device for heating water in the hot water tank, a water mixing valve assembly communicated with the hot water tank and a cold water inlet pipe communicated with the water mixing valve assembly and further comprises a tube-on-sheet heat exchanger and a heat exchange water inlet pipe. The tube-on-sheet heat exchanger type shampoo bed can recover hygienic hot water waste heat immediately and low-grade fluid heat, saves energy and is environmentally friendly, the energy consumption caused by tap water heating is reduced, resources are saved, and the usage cost is reduced. The plate A and the plate B are combined to form the core body by adopting sheet pipe structures, the overall smoothness of a plate A sinking tank is good, sewage is smooth to flow, and the problem of remarkable reduction of the heat transfer coefficient due to dirt blockage and sedimentation is avoided. In addition, tap water is good in heat absorption effect in a medium channel, and the waste water and tap water heat exchange effect is good.

The invention provides an on-line chamfering device and a continuous casting machine and relates to the technical field of chamering. The on-line chamfering device is arranged between a second coolingroom exit of the continuous casting machine and a fire cutting machine, the continuous casting machine has a continuous casting roller way, the on-line chamfering device comprises a vehicle body, synchronous equipment, horizontal adjusting equipment, an oxygen gun and a slag flushing water gun, wherein the vehicle body stretches over the continuous casting roller way; the synchronous equipment comprises a fixed track, a first roller and a first driving part; the horizontal adjusting equipment comprises a horizontal guide rail, a second roller, a horizontal adjusting plate and a second drivingpart; the oxygen gun and the slag flushing water gun are connected with the horizontal adjusting plate, move along with the horizontal adjusting plate and are used for chamfering cutting and slag flushing with a corresponding corner of a billet located on the continuous casting roller way.

An arrangement for maintaining the warmth of slabs which exit from a continuous casting installation and which can be transported on a roller table for further processing. In order to optimize the thermal balance between the continuous casting installation and the hot rolling mill, a supporting part is provided for receiving a slab, which supporting part can be placed on the roller table and transported thereon, and an insulating box which can be placed upon the supporting part and which substantially encloses the latter.

The invention relates to a constant-temperature humidification device, comprising: a gas source inlet disposed at the middle and lower part of one side of the device; a gas source outlet at the middleand upper part of the other side of the device; a thermostat disposed at the bottom of the device; a power supply connection line connected to the thermostat and penetrating the device. The device isadvantageous in that the thermostat performs mild heating and thermal insulation for the device to avoid a sharp rise in temperature; a baffle structure with a unique structure is arranged in the humidification device, can prolong the residence time of gas in the device, and can avoid humidity or temperature loss of heated and humidified gas in a flowing process.