45results about How to "Lower the holding temperature" patented technology

The invention discloses a preparation method of a Zn-Al-Ni anticorrosion functional impregnation layer, in which such elements as Al and Ni are added into a zinc impregnation agent to change the organizational structure of the conventional zinc and aluminum impregnation layer prepared through mechanical energy aided impregnation. An impregnation agent is prepared according to the following ratio (based on a total number of 100 parts): 20-50 parts of zinc powders (an impregnation supplying agent), 5-25 parts of aluminum powders (an impregnation supplying agent), 0.5-5 parts of nickel powders (an impregnation supplying agent), 0.1-2 parts of ammonia chloride (an activating agent), 0.1-2 parts of rare earth (a catalyst), and of the balance of Al2O3 powders (a filler). The preparation method of the Zn-Al-Ni anticorrosion functional impregnation layer comprises the following steps: uniformly mixing the zinc powders, the aluminum powders, the nickel powders, the rare earth and the Al2O3 powders according to the ratio, and weighing the mixture for later use; and carrying out heat preservation for 3-5 hours under the following technical parameters: a heat preservation temperature of 450 DEG C, and an impregnation furnace rotation speed ranging from 5r / min to 7r / min. The preparation method provided by the invention has the advantages that a high quality of the impregnation layer is ensured through adopted particle diameters of the powders in the impregnation layer formula, and the prepared Zn-Al-Ni impregnation layer achieves low thickness, high surface compactness, high rigidity and excellent anticorrosion performance.

The invention, belonging to the field of construction engineering, relates to an anti-stripping warm mix asphalt additive agent comprising surfactant, its preparation method and application. The anti-stripping warm mix asphalt additive agent disclosed in the invention comprises polyvinyl acetal, polyacrylamide, fatty acid anhydride ester surfactant, polyoxyethylene acid ester surfactant and water. The warm mix asphalt additive agent disclosed in the invention can enhance the bonding of stone, rock flour and asphalt, so as to get the purposes of high strength and preventing stripping. The requirements of the technical characteristics of the warm mix asphalt is realized by spraying the additive agent with the content of 5-6% of the weight of the asphalt when the temperature of the asphalt reaches 120-130 DEG C, and then carrying out blending and operation as routine asphalt. The warm mix asphalt additive agent disclosed in the invention has no substances which are harmful to the human body and environment, with being environmentally friendly, and is an excellent product with energy saving and emission reduction.

The invention provides a control panel and a control method of a cooking utensil and the cooking utensil. The control panel is arranged on a pot body of the cooking utensil; the control panel comprises a first area and a second area, wherein the first area is provided with a setting button, and the setting button is used for triggering the cooking utensil to enter a working state setting mode of arefrigerating device of the cooking utensil; the second area is used for displaying the working state of the refrigerating device. According to the technical scheme provided by the invention, a usercan set the working state of the refrigerating device through the control panel according to the actual requirements, so that food in the cooking utensil can be cooled through the refrigerating device, and thus the use experience of a user is promoted.

The invention relates to a method for preparing a semiconductor oxide nano material, in particular to a method for preparing a zinc oxide micron sphere. In the method, ultrasonic activation treatment is not needed, the pH value of solution is adjusted and the appearance of a product is controlled by using NH4F, the solution is not needed to be diluted and the yield can be improved to the maximum extent; and the solution is not needed to be stirred in the water bath heat preservation process, the temperature of heat preservation can much lower than the boiling point of water, and the method contributes to large scale industrial production.

Belonging to the technical field of pulping, the invention relates to a method of cooking pulping by preimpregnation of dendrocalamus giganteus in a propylene glycol organic solvent. The method includes: firstly splitting dendrocalamus giganteus into bamboo segments that are 2cm-3cm long and have a width of less than 3cm to serve as the pulping raw materials; adding the pulping raw materials into a propylene glycol analytically pure reagent to conduct preimpregnation, and then performing separation to obtain an impregnated material; adding a pulping agent into the impregnated material, then putting the mixture into a chain oil bath cooking pan, and separating the slurry and the waste liquid at the end of cooking; washing the separated slurry and then subjecting the slurry to screening in a pulp screener to obtain clean dendrocalamus giganteus paper pulp; adding cold water into the waste liquid to carry out dilution standing and centrifugal separation, performing microfiltration with a microfiltration membrane, conducting ultrafiltration with an ultrafiltration membrane, implementing reduced pressure distillation to remove water, and then using the obtained solution to replace the propylene glycol analytically pure reagent to serve as the preimpregnation reagent. The paper pulp prepared by the method has the advantages of high yield, high viscosity, high whiteness and good strength.

The invention relates to an in-situ warm-mixing regenerant for a bituminous pavement, and a preparation method and a construction method of the in-situ warm-mixing regenerant. The strength of a cold-regenerating mixture is longer in formation time; a finish coat in a certain thickness is required to be paved additionally; the property of the regenerated mixture is poorer; a lower level cold mixing technology is used generally; and cement is required to be added generally, so that the durability of the level is reduced. The in-situ warm-mixing regenerant for the bituminous pavement comprises the following raw materials in parts by mass: 10-30 parts of naphthenic hydrocarbon, 20-40 parts of furfural extract oil, 30-50 parts of deionized water, 10-20 parts of microwave absorption agent, 5-10 parts of surfactant, 5-10 parts of dispersing agent and 1-5 parts of antiaging agent. According to the in-situ warm-mixing regenerant, the preparation method and the construction method, the mixing cost can be lowered; the construction efficiency is improved; a use ratio of old materials is increased; compared with in-situ heat regeneration, the ageing of a bituminous mixture is reduced; the service life of the pavement is prolonged; a cooling rate is reduced; the discharge amount of harmful gas and dust is decreased; new aggregates and new bitumen are not required to be added; and the material cost is lowered.

The invention relates to a method for ultra-low dust emission of a heating furnace in a low temperature heat preservation state. The specific steps include adding a variable frequency fan on the heating furnace, and turning on the variable frequency fan in a low temperature heat preservation state; adjusting the frequency of the fan to below 33 Hz, The fan speed is reduced to 950rpm; the injection speed of the burner is reduced by more than 20%, and the burner is in a state of oxygen-deficient combustion; after adjusting the above parameters, the dust concentration drops by 0.5~1 mg / Nm 3 , the oxygen content in the flue gas is reduced to less than 19%, and the flue gas emission of the heating furnace under low temperature heat preservation can be carried out. The advantages of the invention are that it is easy to operate and control, realizes ultra-low dust emission of the heating furnace in a low-temperature heat preservation state, reduces the heat preservation temperature of the heating furnace itself, and is environmentally friendly and energy-saving.

The invention discloses a novel composite modifier for austenitic manganese steel, comprising rare earth alloy, ferrotitanium, calcium silicon and aluminum, wherein the dosage of the Re-containing rare earth alloy accounts for 0.20-0.25 percent of the weight of molten steel; the dosage of the ferrotitanium accounts for 0.02-0.03 percent of the weight of the molten steel; the dosage of the calciumsilicon accounts for 0.20-0.25 percent of the weight of the molten steel; and the dosage of the aluminum accounts for 0.15-0.20 percent of the weight of the molten steel. Treatment inside a furnace is carried out in the alloying adjustment stage for the composition of the molten steel after ferromanganese is added for the fine adjustment of the manganese content of the molten steel; one third of the rare earth alloy is added to a molten pool, and the aluminum is added before the tapping of the molten steel. Treatment outside the furnace is to add the calcium silicon, two thirds of the rare earth alloy and the ferrotitanium to a steel ladle. The adoption of the Re-Ca-Ti-Al multi-element composite modifier prolongs the effective time of the modification process of the molten steel and guarantees good modification effect.

The invention discloses a dyeing process of Lycra cotton-containing knitted fabrics and mainly aims at solving the problems of large amount of water and coal consumption, and long time and high power consumption of a traditional process. The dyeing process comprises a presetting step, a hemming step, a pretreatment step, a dyeing step, an after-treatment step and an after-finishing step, which are orderly implemented; the presetting step comprises the procedure of adding auxiliaries to a rolling liquid system of a setter; the pretreatment step comprises the procedures of heating a bathtub and then preserving heat, and then washing by use of overflowing water. The dyeing process is characterized in that the tea saponin is used for bleaching instead of the hydrogen peroxide; as the tea saponin does not damage equipment, the tea saponin can be added in the presetting step for bleaching, and the operation of removing the hydrogen peroxide in the pretreatment step is avoided, so that the flow is shortened and the process is simplified, and the heat preserving temperature in the pretreatment step is also reduced. More importantly, the water consumption, coal demand and power consumption of the dyeing process are all reduced and the purpose of saving energy sources is realized, and the time taken by the process is reduced.

The invention discloses a heat preservation control method for an electric rice cooker, belongs to the technical field of kitchen cooking, and solves the problem of food hardening and yellowing caused by long-time heat preservation of an existing electric rice cooker. The electric rice cooker comprises a control unit, a heating apparatus and an inner pot, wherein the heating apparatus comprises a bottom heater for heating the bottom of the inner pot and a side heater for heating the side part of the inner pot. According to the heat preservation control method, the control unit controls the bottom heater and the side heater to alternately perform heat-preservation heating according to a set heat preservation temperature after the electric rice cooker enters a heat preservation stage. The heat preservation control method is used for the electric rice cooker to perform food cooking such as rice cooking, congee cooking and the like.

A boiling fluidization drying apparatus comprises an upper bed body, a middle bed body and a frame. An air outlet is arranged on the top face of the upper bed body. A feed port and a discharge chamberare respectively arranged at the front face and the back face at the lower portion of the upper bed body. A fine powder reflux pipe inserted from the top face is arranged in the upper bed body. The middle bed body is divided into a plurality of drying chambers along the front-and-back direction by a baffle plate. An opening is arranged at the lower portion of the baffle plate. An air duct is formed. A hole plate is arranged at the connection of the middle bed body and the lower bed body. The lower bed body is a wind division apparatus. The wind holes on the hole plate are fishscale holes andarranged in a row orderly. The direction of the air outlets of the wind hole in the same row is consistent. The hole rows are arranged at intervals at the back left portion and the back right portionof the air outlet. An included angle exists between the projection of the air outlet of the wind hole on the hole plate and the central line of the hole plates at the front-and-back direction. The invention has good drying effect and is especially suitable for drying the thermal sensitivity materials.

The invention provides a forging method of nickel base alloy containing copper and the nickel base alloy containing copper and belongs to the technical field of forging technologies. The forging method overcomes the defects that because copper is added to the nickel base alloy, the hot working character is poor, and forge cracking is caused, and the yield can be effectively improved. The forging method comprises the steps of conducting billet forging, wherein preprocessed nickel base alloy ingots containing copper are placed in a heating furnace, the nickel base alloy ingots containing copper are heated to the temperature T1, the temperature T1 is kept, forging is conducted according to the forging ratio y1, so that forging stocks are obtained, the temperature T1 is 1120+ / -10 DEG C, and y1 is smaller than or equal to 1.4; conducting initial forming, wherein the forging stocks are arranged in the heating furnace to be heated, the temperature is kept, and forged pieces which are initially formed are obtained through forging; conducting final forging, wherein the initially formed forged pieces are arranged in the heating furnace to be heated to the temperature T3, the temperature T3 is kept, forging is conducted according to the forging ratio y3, so that finished forged pieces are obtained, the temperature T3 is higher than 1000 DEG C and lower than 1080+ / -10 DEG C, and y3 is larger than 1.5 and smaller than 2. The forging method can be used for forging of the nickel base alloy containing copper.

The invention discloses a preparation method of 1300MPa grade rare earth reverse transformation Q&P steel. Its chemical composition by mass percentage is: C: 0.12‑0.18%, Mn: 2.0‑3.0%, Si: 0.8‑1.2%, Al: 0.6‑1.0%, V: 0.05‑0.08%, B: 0.001‑0.003%, P<0.02%, S<0.01%, the balance is Fe and unavoidable impurities. According to the composition design of the present invention, a certain amount of mixed rare earth ferroalloy is added, smelted and made into cast slabs. Combine the reverse transformation process with the Q&P process to increase the stability of austenite. Low Si content ensures surface quality and hot rolling performance, and improves hardenability through Al and B, adding a certain amount of V to introduce a dispersed second phase, V and Si are combined to enhance the work hardening ability of ferrite. By adding a suitable content of rare earth, it plays a role in modification, refines the crystal grains, and improves the comprehensive mechanical properties of the steel plate. The steel plate produced by the invention has a microstructure of martensite, ferrite, retained austenite and dispersed second phases. The tensile strength is greater than 1300MPa, and the elongation after fracture is greater than 15%. It has a good combination of strength and plasticity.

The invention discloses a method capable of simultaneously improving the oxidation and corrosion resistance of NdFeB powder and a magnet, which belongs to the technical field of magnetic materials. The present invention protects the NdFeB powder and the magnet by heating the NdFeB powder or the magnet together with the coating layer metal to form an Al, Zn, Ni, Cu or alloy coating layer on the surface, so that the magnetic powder has better oxidation resistance, and the subsequent treatment The process can be realized in air, and the magnet can be applied in the device without electroplating.

The present invention discloses a two-stage type rubber asphalt warm mix method, which comprises: 1) preparing raw material; 2) carrying out heating mixing; 3) adding an oil produced from a crude oil vacuum distillation tower, and carrying out a first stage reaction; and 4) adding a RH asphalt warm mix modifier to carry out a second stage reaction, and carrying out a viscosity reduction treatment. The invention further discloses a product prepared by performing the preparation method. According to the present invention, the method has characteristics of simple process, easy achievement and high efficiency; under the premise of assurance of the road performance, the two auxiliary agents are adopted to modify the rubber asphalt at two stages so as to effectively reduce the reaction temperature of the rubber asphalt, reduce the fuel consumption, reduce the emissions of harmful gases and dust, reduce the environmental pollution and improve the construction environment; and the product provided by the present invention has characteristics of low viscosity, low reaction temperature, asphalt pavement construction season prolonging, asphalt mixing material aging reducing, road performance improving, effective reduction of fuel energy consumption required by the mixing material production process, energy source saving and mixing cost reducing.

The invention specifically relates to a hot-rolled hot-formed steel and a preparation method thereof, belonging to the technical field of high-strength steel for automobiles. The chemical composition of the hot-rolled hot-formed steel is calculated by mass fraction: C: 0.18%-0.50%, Si: 0.3 %‑1.7%, Mn: 1.0%‑4.0%, Alt: 0.02%‑0.09%, Cr: 0.8%‑2.5%, P≤0.015%, S≤0.015%, B: 0.001‑0.012%, Mo: 0.03% ‑0.20%, Ti: 0.01%‑0.07%, Nb: 0.02%‑0.12%, and the rest are Fe and unavoidable impurity elements; the mechanical properties of the hot-rolled hot-formed steel provided by the embodiments of the present invention are: Rp0.2= 900MPa-1100MPa, Rm=1500MPa-2200MPa, A50=6%-12%; the yield strength of the hot-rolled sheet before thermoforming is 400MPa-700MPa, the tensile strength is 600MPa-1000MPa, and the elongation A50=15%-20%.