34results about How to "Slow down the rate of condensation" patented technology

The invention discloses retarder applicable to sulphate aluminum cement. The retarder is composed of, by weight, 7-60 parts of carbamide, 3-11 parts of sodium lignin sulfonate, 2-7 parts of dinaphthyl methane disulfonic acid sodium, 2-5 parts of water reducing agent and 30-70 parts of vermiculite. By means of the retarder, the coagulation speed of the sulphate aluminum cement can be effectively reduced, the flowability of sulphate aluminum cement slurry can be remarkably improved, and the water demand in the sulphate aluminum cement mixing process can be reduced. The carbamide is added into the retarder, the coagulation time of the sulphate aluminum cement can be prolonged, nitrogen nutrient elements required by the plant growth can be further released slowly after the cement slurry is hardened, and the nitrogen nutrient elements are supplied to plants in porous plant-growing concrete for meeting the plant growth requirements.

The invention relates to an ultra-thin flat heat pipe and a manufacturing method thereof. A wick comprises a porous medium bottom layer and a plurality of porous medium filaments arranged side by side; the porous medium filaments make contact with the top of a tube shell; the wick inside the heat pipe, a sharp angled area between the porous medium filaments and the upper surface of the tube shell, and a sharp angled area between the porous medium filaments and the porous medium bottom layer provide liquid return capillary driving force which is large enough in a limited space; spaces formed between the porous medium filaments provide steam flow channels, and the steam flow channels communicate with one another; and reasonable matching of vapor-liquid phase distribution is achieved, and steam and condensed liquid can flow easily. According to the ultra-thin flat heat pipe, efficient operation can be maintained at various angles, the performance of anti-gravity operation is excellent, the heat flux which can be borne by the heat pipe is high, and the heat transfer performance of the heat pipe is remarkably improved after further modification treatment.

The invention discloses a retarder for sulphate aluminum cement and a use method thereof. The retarder is prepared from the following raw materials in parts by weight: 30-70 parts of polymer emulsion, 10-25 parts of metylchloro isothiazolinone, 2-10 parts of film-forming agent, 1-15 parts of water reducer and 5-15 parts of polyethylene glycol. The invention also discloses the use method for the retarder. The retarder disclosed by the invention can effectively reduce the coagulation speed of the sulphate aluminum cement; the initial setting time and the final setting time both can be prolonged for above 30min; the fluidity of the cement slurry can be obviously promoted; the fluidity of cement paste can be increased by above 15%. The retarder disclosed by the invention has no any adverse effect to the development of the cement strength, is low in cost, is high in performance stability and is easily stored and transported.

The invention discloses low-water-absorption foamed cement. The low-water-absorption foamed cement is prepared from the following raw materials in parts by weight: 100 parts of cement, 1.8 to 2 partsof a foaming agent, 0.6 to 0.8 part of a foam stabilizer, 10 to 12 parts of a waterproof agent, 0.02 to 0.04 part of a naphthalene water reducer, 0.4 to 0.6 part of a reinforcing agent, and 45 to 50 parts of water, wherein the foaming agent is lauryl sodium sulfate and fatty alcohol polyoxyethylene ether sodium sulfate. The low-water-absorption foamed cement is good in waterproof performance, lowin water absorption rate and good in strength.

The present invention relates to a lid mold structure with a grill and a diversion control device. The lid mold structure is characterized in that: a fixed mold frame is provided internally with a fixed mold core; a movable mold frame is provided internally with a movable mold core; the movable mold core is connected to a shunt sub; the fixed mold core is provided with a sprue bush; the center of the fixed core is provided with a molding recess; the molding recess is provided with a circular radiator grill; one side of the circular radiator grill is provided with two diversion control modules; the other side of the circular radiator grill is provided with a condensation control cavity; the center of the movable mold core is provided with an oval shaping boss; the center of the oval shaping boss is provided with a molding grill; one side of the molding grill is provided with a semicircular boss, and one side of the boss is connected to a guide column group; and shaping boss is equipped with a deceleration bump group. Dross outside the shaping boss and the circular radiator grill in the fixed mold core realize the more efficient and smooth gas exhaust, rapidly reduce local problems, improve the efficiency of coagulation, reduce the pores of the product, and improve the mold quality.

The invention discloses an environmentally friendly and pollution-free concrete dew stone agent, which is made of the following materials in proportion by weight: hydroxypropyl methylcellulose, liquid sodium silicate, hydroxyl, carboxylate, protein, fatty acid, glucose, Urea, sodium carboxymethylcellulose, tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, β-naphthalenesulfonate formaldehyde condensation product water reducer and pour point depressant; this type of concrete The dew stone agent has the advantages of low engineering cost, strong practicability, environmental protection, no pollution and stable effect.

The invention discloses a downward access road filling mining method which comprises the following steps: dividing a mining area into interval filling layers and complete filling layers alternately distributed in the vertical direction, adopting the downward access road layer-by-layer mining method, and alternately filling a high-strength quick setting filling material and a low-strength quick setting filling material in goafs of the interval filling layers and the complete filling layers, wherein the high-strength quick setting filling material is made of cement clinker, whole tailings, wasterock and an accelerator, and the low-strength quick setting filling material is made of cement, active slag, tailings and an accelerator, so that an upper-layer filling body is jointly supported by alower-layer high-strength filling body and a low-strength filling body to prevent the upper-layer filling body from collapse, the using quantity of cement in mining safe filling material is ensured,and the filling cost is reduced; and in addition, a small quantity of accelerator is added in the filling material to greatly shorten the time waiting for the filling material to reach the preset strength, so that the stoping time is shortened to greatly improve the mining efficiency.

The invention provides a single crystal furnace shutdown thermal field damage prevention method which comprises the following steps of: 1, drawing a crystal when residual molten silicon liquid existsin a quartz crucible, and enabling the first length of the crystal to enter a water-cooling heat shield; 2, after the crystal is drawn to a second length, stopping drawing the crystal, and enabling one end of the crystal to be in contact with the liquid level of the molten silicon liquid; 3, after the crystal is static, reducing the heating power of an auxiliary heater at the bottom of the singlecrystal furnace to zero; 4, reducing the power of the main heaters around the single crystal furnace in three stages until the heating power of the main heaters is reduced to zero; and 5, cooling fora certain period of time, and disassembling the single crystal furnace. According to the method, a single crystal with a certain length can be drawn to increase the heat transfer volume, accelerate the condensation speed of molten silicon liquid in the middle of a quartz crucible and reduce the stress concentration ratio, a heater on the single crystal furnace stops heating in a stepped mode, thecondensation speed of silicon around the quartz crucible is reduced, a stress release area is reserved, and therefore the integrity of a thermal field is guaranteed to the maximum extent.

The invention provides ceramic tile pasting mortar and a preparation method thereof. Waste tires are used for preparing machine-made sand, the existence of black garbage is effectively reduced, and meanwhile, the modified waste tire particles have very high ductility and excellent energy absorption performance, and can effectively prevent the dry shrinkage phenomenon of the mortar in the solidification process. A binding agent is added, the binding force of the mortar to the ceramic tile is increased, meanwhile, the binding agent is alkaline, the interface on the back face of the ceramic tile can be slightly reacted, the roughness of the interface is increased, and the binding agent can adhere and cure the mortar interface more easily. A modified retarder is added, so that the coagulation speed of the mortar is slowed down, the mortar does not react with groups outside modified waste tire particles and a binder, meanwhile, the modified retarder has the effect of a plastic stabilizer, the anti-sagging property of the mortar is improved, the micro-reaction inside the mortar is stabilized, and the bonding capacity of the mortar and a matrix interface is improved.

The invention discloses a foundation pit pre-embedded type double-liquid grouting leaking stoppage device. The device comprises a preset hole formed in an original soil layer and close to a water stop wall, a containing groove is formed in the top of the preset hole, a containing plate is connected into the containing groove, a mounting groove is formed in the containing plate, a mounting plate is connected into the mounting groove, and the mounting plate is arranged in the mounting groove, mounting holes are formed in the two sides of the mounting plate, connecting mechanisms used for fixing the mounting plate to the containing plate are arranged in the mounting holes, an opening is formed in the middle of the mounting plate, a second mounting frame located above the opening is fixed to the upper end of the mounting plate, and two connecting sleeves are rotationally connected to the lower end of the second mounting frame; the lower ends of the two connecting sleeves are fixedly sleeved with a cement paste pipe and a water glass pipe correspondingly. The device has the effects of rapidly filling the collapsed position and preventing the ground of the original soil layer from collapsing, and the cement paste and the water glass are mixed more uniformly, so that the mixed condensation filling effect is improved.

The invention belongs to the technical field of concrete materials, and in particular relates to a roadway road foundation filling composition and a preparation method thereof. The composition includes by mass: 32.5- 47.8% of a binder, 63.3- 82.4% of a coarse aggregate, 32.2- 44.5 of a fine aggregate, 10.6-18.4% of gypsum, 4.5-8.7% of fatty alcohol polyoxyethylene ether sulfate sodium, 12.3-17.5%of polyvinyl chloride cement, 3.8-7.6% of a cellulose fiber, 4.4-9.7% of citric acid, 5.2-8.3% of tartaric acid, 2.7-6.5% of aluminite, 5.4-10.8% of quicklime, 3.3-7.2% of magnesium oxide, 1.2-5.5% of kyanite, 4.6-9.6% of calcium chloride, 4.8-8.2 % of ethylene glycol and 45.7-82.6 % of water. The roadway road foundation filling composition has the advantages of easy water seepage, freezing resistance, slow condensing speed and convenient transportation.

The invention relates to the technical field of mining engineering, and particularly discloses a paste filling cementing material and a paste filling slurry. The paste filling cementing material is prepared from, by mass, 55-65% of high alite Portland cement clinker, 25-35% of steel slag, 2-5% of nano SiO2, 2- 3% of nano CaCO3, 2-6% of modified gypsum and 0.1-0.5% of a compound additive. The industrial solid waste steel slag is used as the raw material, the process is simple, the production cost is greatly reduced, a guarantee is provided for green mining of mines, and a new way is provided for comprehensive utilization of industrial solid wastes. The paste filling cementing material is used for preparing paste filling slurry, and the problems that the paste filling material is low in early strength, poor in slurry fluidity, high in cost and energy consumption and the like are solved.

The invention discloses a combined cooling process for aluminum alloy castings, and relates to the technical field of aluminum ingot machining processes for re-melting. The combined cooling process for the aluminum alloy castings comprises the following steps including S1. molten aluminummolten aluminum preparation: placing an aluminum ingot in an aluminum melting furnace and heating to transformthe aluminum ingot into molten aluminumthe molten aluminum; S2. furnace transfer: transferring the molten aluminummolten aluminum into a heat-insulation furnace; S3. heat-insulation temporary storage:a temperature in the heat-insulation furnace is 700-750 DEG C, a pressure in the furnace is 2-3 times of a standard atmospheric pressure, humidity in the furnace is not greater than 75%, and a heat-insulation time is 10 min-20 min; S4. die-casting: injecting the molten aluminum subjected to heat-insulation treatment into a corresponding die through a die-casting machine; S5. cooling: taking off the die and carrying out cooling treatment so as to gradually form the molten aluminum in the die; and S6. burr polishing: opening the die, taking out the castings and polishing burrs on the castings through manual treatment to obtain blanks. According to the scheme, the number of air holes in the blanks can be reduced, and the case of breakage of the blanks is reduced, so that the rejection rate is lowered.

The invention provides a biological protein glue-triamcinolone acetonide slow release agent as well as a preparation method and application of the slow release agent. The slow release agent comprises biological protein glue, aprotinin and triamcinolone acetonide, wherein the biological protein glue is used as a medicine carrier, the aprotinin is used as a slow solvent, and triamcinolone acetonide is taken as an effective medicine component. The prepared biological protein glue-triamcinolone acetonide slow release agent is directly sprayed to a corresponding surgical region of a digestive tract by virtue of an endoscope and is capable of playing a durable anti-inflammatory role, so that the formation of postoperative scars is reduced, the postoperative esophageal stenosis is prevented, and the life quality of a patient is effectively improved.

The invention relates to a sugar-coated haw extruding device, in particular to a sugar-coated haw extruding device for food processing. The technical problem to be solved is to provide the sugar-coated haw extruding device for food processing, which is simple to operate, reduces the workload of operators and improves the working efficiency. In order to solve the technical problem, the sugar-coated haw extruding device for food processing comprises a bottom plate, a supporting plate, a placing assembly and a pressing assembly; the top of the bottom plate is connected with an operation table; the supporting plate is connected to one side of the top of the operation table; the placing assembly is connected to the operation table; and the pressing assembly is connected between the operation table and the supporting plate. According to the device, through cooperation of the placing assembly and the pressing assembly, sugar-coated haws can be extruded, manual operation is not needed, the workload of the operators is relieved, and the working efficiency is improved.