31results about How to "Stable heating rate" patented technology

The invention provides a rapid annealing method for ohmic contact of metal and silicon carbide, which comprises the steps of (1) placing SiC wafers on a Si sheet tray, then arranging the Si sheet tray on a rapid thermal treatment device, and simultaneously filling the device with protection gas Ar; (2) performing a first temperature-rise period, and keeping the temperature; (3) performing a second temperature-rise period, and steadying the temperature; (4) performing a third temperature-rise period; (5) performing a fourth temperature-rise period, namely, annealing period; and (6) performing a temperature reducing period. The method has benefits as follows: the method is carried out in the commercial rapid thermal treatment device taking any light radiation as a heat source; and the silicon sheet used as the tray can adopt various standards of commercial polishing monocrystalline silicon sheets and has low cost. The annealing method can remove the moisture on the surface of the silicon carbide wafer and stabilize the temperature. On the premise of ensuring the control precision of the peak thermal treatment temperature, the heating rate is improved through changing the setting value. Finally, the annealed ohmic contact resistance is reduced; and the quality of the ohmic contact, the device reliability and the yield are improved.

The invention provides a novel carbon fiber hot-core floor based on a modified carbon fiber hot-core layer. A preparation method comprises the specific operation steps that long fibers of carbon fibers are cut off and stirred to be broken, and carbon fiber short fibers to be modified are obtained; the carbon fiber short fibers to be modified are placed in a low-temperature plasma apparatus to be subjected to plasma treatment, and activated carbon fiber short fibers are obtained; the activated carbon fiber short fibers are added into a hydrochloric acid solution containing aniline, slow stirring is conducted, an initiator is added, reacting is conducted at room temperature, and the carbon fiber short fibers are taken out, washed and dried to obtain polyaniline-coated modified carbon fibers; the polyaniline-coated modified carbon fibers are placed in paper making equipment or non-woven fabric manufacturing equipment, and modified carbon fiber paper is obtained or a carbon fiber non-woven fabric is obtained; the modified carbon fiber paper or carbon fiber non-woven fabric is composited with an electrode and an insulating material phase to obtain the based modified carbon fiber hot-core layer, and the modified carbon fiber hot-core layer is composited with a wooden layer phase to obtain the carbon fiber hot-core floor based on the modified carbon fiber hot-core layer.

The invention discloses a link plate balling and annealing technology which comprises the following steps of: putting a link plate on a tray in an inner barrel of a balling and annealing furnace and closing a furnace cover; heating the inner barrel to the temperature of 720 DEG C at the speed of 5 DEG C per minute; preserving the heat for 5 hours; slowly cooling the inner barrel to the temperature of 650 DEG C, and closing an air inlet valve to stop charging methanol gas; forcibly cooling the inner barrel to the temperature of 500 DEG C in 3 hours; and opening the furnace cover, hoisting the link plate out of the furnace, and cooling the link plate to normal temperature with air. The technology can ensure that the treated workpiece has good cutting performance, low hardness and high deformability, so that the quality and the service performance of the product are improved.

The invention relates to a control method for increasing the blowing end point temperature of a steelmaking converter. Firstly, the addition amount of steel scrap cold material and the type and quantity of the first batch of blowing material are determined. At the end of the oxidation period of silicon and manganese, the alkalinity of steel slag The range is 1.1-1.8, the MgO content in the slag is 4.0%-6.5%, the TFe content is 15%-23%, and the molten iron temperature is 1385-1425°C; Calcium and magnesium-containing slagging material and iron-containing oxide cold material; steel slag alkalinity ranges from 2.7 to 3.4, MgO content in slag is 7.5% to 10.5%, TFe content is 13% to 19%; gun operation. The method ensures that the slagging reaction in the whole process of converter blowing is compatible with the reaction process of molten iron, stabilizes the heat dissipation coefficient and the temperature rise rate in the process of converter blowing, and improves the temperature control capability at the end point of steelmaking converter blowing.

The invention belongs to the steel technical field, and specifically, relates to a vanadium-nitrogen microalloyed high-strength phase-transformation induced plastic steel seamless pipe and a preparation method thereof. The vanadium-nitrogen microalloyed high-strength phase-transformation induced plastic steel seamless pipe comprises the chemical ingredients by the weight percentage: 0.18%-0.24% of C, 1.0%-1.6% of Si, 1.2%-1.6% of Mn, 0.17%-0.22% of V, 0.01%-0.03% of N, not more than 0.06% of P, not more than 0.005% of S, and the balance iron and unavoidable impurities. With utilization of an intermediate-frequency induction heat treatment device of a thin-wall steel pipe and with supplementary of a vanadium-nitrogen microalloyed component design, the advantage of cooperation of good strength and elongation of phase-transformation induced plastic steel is successfully applied to the steel pipe production field, a fact of replacing solid components with hollow components is effectively realized so as to achieve automobile light weighting, besides, further development of an internal high pressure forming technology is promoted, not only are the internal high pressure formed components with high strength, large deformation and complex shape produced, but also the production cost is greatly reduced, and the preparation method has wide application prospects are provided.

The invention belongs to the technical field of nuclear safety control and relates to a high-temperature steam oxidation quenching test device and method for a reactor cladding material. The test device comprises a steam generator, an ordinary resistance furnace, a reaction chamber, a quenching tank, a thermocouple, a hydrogen analyzer and connecting pipes, wherein high-temperature steam provided by the steam generator enters the reaction chamber through the connecting pipe; the reaction chamber is used for accommodating a sample for a high-temperature steam oxidation quenching test; the reaction chamber is heated by a common resistance furnace outside the reaction chamber; the thermocouple is installed in the reaction chamber for measuring and controlling the temperature; the quenching tank is connected to the lower part of the reaction chamber for quenching the sample falling into the water in the quenching tank; the hydrogen analyzer is connected to the reaction chamber through the connecting pipe for analyzing content of hydrogen gas generated in the reaction chamber. With adoption of the test device and method, whether the reactor cladding material meets safety criteria can be evaluated easily and efficiently with the temperature accurately controlled and at a low cost.

The invention relates to a roasting furnace roasting control method. The method comprises the steps that roasting product green bodies and filler are fed through inlets in the tops of workbins and operate from top to bottom under the effect of self weight, high-temperature flue gas in flues on the two sides flows from bottom to top, and an indirect countercurrent heating mode is formed; the flues are partitioned into a forced heating section and a natural heating section according to temperature levels of all layers inside the flues, flue temperatures of the forced heating section are controlled to be within target temperature ranges mainly through fuel added from nozzles, and the temperature levels of the all layers of the flues of the natural heating section are mainly maintained through combustion of volatile matter precipitated from roasting products; and the workbins are also partitioned into a preheating section, a heating section and a cooling section according to temperature levels of materials in the workbins during falling, the heating rates, the final roasting temperatures and the tapping temperature levels of the materials in a roasting furnace are controlled through the flue temperatures, and the high-temperature roasting and cooling process of the products is completed. Manual operation is greatly reduced, and the novel roasting furnace is made to have a higher automation level and higher system stability.

The invention provides a device for synthesizing aluminum sulfate. The device comprises a first water inlet pipe, a second water inlet pipe, a low-pressure steam pipe, an aluminum powder feeding pipe, a concentrated sulfuric acid feeding pipe, a condensed water pipe, a hot water storage tank, a reactor, a slag cutting pot, an intermediate storage tank, a precision filter and an aluminum sulfate storage tank, wherein the hot water storage tank, the reactor, the slag cutting pot, the intermediate storage tank, the precision filter and the aluminum sulfate storage tank are connected in sequence; a coiled pipe is arranged on the inner wall of the reactor; an inlet and an outlet of the coiled pipe are formed in the outer wall of the reactor; one end of the low-pressure steam pipe is connected with the inlet of the coiled pipe; one end of the condensed water pipe is connected with the outlet of the coiled pipe; one end of the hot water storage tank is connected with the inlet of the coiled pipe, and the other end of the hot water storage tank is connected with the first water inlet pipe; and one end of the second water inlet pipe is connected with the outlet of the coiled pipe. The invention further provides a method for synthesizing aluminum sulfate by using the device. The device and the method provided by the invention have the advantages of operation stability and security and high conversion rate of raw materials. By adopting the device and the method, the loss of sulfuric acid and steam can be reduced greatly, and the pollution to air can be alleviated significantly, and the energy consumption of the device is reduced.

The invention provides a method for preparing an electrode of ZIF-derived CoMoO4. the method is characterized in that the method uses a high temperature calcined ZIF-67 as a precursor to prepare CoMoO4 by hydrothermal method., that steps are as follow: (1) molybdate and a compound containing a Co salt are taken and stirred in deionized water until the molybdate and the compound contain the Co saltare dissolved; (2) a small amount of ZIF-67 power are added, stirred to a homogeneou solution; 3, that mixture is transferred to a reaction kettle, and the mixture is cooled to room temperature afterreaction for 2h; (4) alternately cleaning and drying are performed for 24h; (5) Ultrasonic cleaning is performed for 30 min, deionized water cleaning and ultrasonic are performed, drying is performedfor 12 h; 6) that graphite paper is dried at constant temperature, the required material is ground in a mortar, a small amount of solvent is added, uniformly dropping on the dried sheet layer, and then drying is performed, and 7) a regular-shaped electrode of ZIF-derived CoMoO4 is performed. The invention overcomes the problems of poor stability and small specific capacitance of metal oxide electrode in the prior art, and provides a preparation method of CoMoO4 derived from metal oxide electrode material ZIF with high specific capacity and good stability.

The invention relates to a sintered brick, in particular to a sintered brick made of iron ore slag and a preparation technology of the sintered brick. The sintering raw material of the iron ore slag sintered brick comprises the components by bone dry weight as follows: 28 to 36 portions of iron ore slag, 27.6 to 41.4 portions of coal gangue or 25.5 to 38.25 portions of coal slag, 20 to 30 portions of silt and 5 to 15 portions of clinker. The iron ore slag sintered brick provided by the invention has the advantages that the source of raw materials is ample, waste iron ore slag is recycled, soil resources are saved, cultivated lands are protected, waste iron ore slag that can be obtained on a large scale and is of great quantity is fully utilized, the waste is changed into valuable, and theenvironment is purified. The obtained iron ore slag sintered brick has the effects of heat preservation, thermal insulation shock resistance and pressure resistance; and peeling and distortion are avoided, breakage or explosion does not occur easily, the yield can reach over 99%, and the sintered brick is suitable for industrial production and can be widely used as wall bricks of buildings.

The invention relates to a multifunctional device used for plating layer research, belonging to the technical field of material annealing. An infrared radiation furnace (2) which can be used in normal pressure and vacuum is arranged below a driving system (1); an electromagnetic induction heating furnace (3) is arranged below the infrared radiation furnace (2); a set of high temperature resistanthigh vacuum isolation room (4) is arranged below the electromagnetic induction heating furnace (3); an air knife (5) is arranged below the high temperature resistant high vacuum isolation room (4); asample clamping mechanism (6) is arranged below the air knife; and a hot-dipping metallic plating melting furnace (7) and a corresponding hydraulic transmission and sealing system (8) are arranged below the sample clamping mechanism (6). A continuous annealing furnace heated by low-inertia infrared radiation can realize a continuous annealing curve simulating industrial production, reduce the thermal inertia of the sample, control the temperature precision of the sample within 1 DEG C, and control a soaking zone of the sample within 100*150mm; meanwhile the test process is clean and does not have any pollution of noise, light and electricity.

The invention discloses a synthesis process of a catalytic activated carbon composite material for decomposing dioxins, comprising the following steps: A, pulverizing the activated carbon and sieving to obtain product A; B, putting product A into a container filled with concentrated sulfuric acid In the process, nitrogen gas is introduced into the bottom of the container, soaked, washed, and dried to obtain product B; C, take product B and metal salt, add alcohol and deionized water, and stir to obtain product C; D, add complexing agent to product C , ultrasonic infiltration, stirring, adjusting pH, and stirring until it is in a sol state, to obtain product D; E, drying product D into a gel to obtain product E; F, under the protection of hydrogen, sintering product E to obtain product F; G. Remove impurities from product F, wash and dry to obtain a finished product. In the present invention, the specific surface area of ​​the modified activated carbon increases, the catalyst is evenly distributed in the activated carbon, the finished product is not easy to form pores and cracks, the structure of the catalyst and the activated carbon is dense, the removal rate of the finished product to dioxin is high and stable, and the finished product Increased service life.

The invention discloses a high-strength plastic vanadium microalloyed dual-phase steel seamless pipe and an on-line preparation method thereof. The seamless pipe is composed of the following chemical components in percentage by mass: 0.10-0.18% of C, 0.1-0.6% of Si, 1.1-1.6% of Mn, 0.16-0.20% of V, 0.01-0.03% of N, at most 0.006% of P, at most 0.005% of S, and the balance of Fe and other inevitable impurities. The intermediate-frequency induction heat treatment device of the thin-wall steel pipe is utilized and assisted by the vanadium microalloyed component design to produce the dual-phase steel seamless pipe with favorable comprehensive mechanical properties; the advantages of low yield-tensile ratio, high rate of work hardening, favorable strength and favorable elongation percentage of the dual-phase steel are matched and successfully applied to the field of production of steel pipes to efficiently substitute solid components with hollow components, thereby implementing light weight of the automobile; and meanwhile, the seamless pipe promotes further development of the internal high-pressure forming technique, and has wide application prospects.