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

The invention discloses a mining method for filling downward approach, which includes ore block division, mining arrangement, stope mining and stope filling. Solidification filling materials and low-strength quick-setting filling materials are alternately filled in the goafs of adjacent ore blocks in each layered approach, thereby reducing filling costs while ensuring mining safety, shortening mining time, and improving mining efficiency. Through the above method, the present invention not only enables the upper filling body to be jointly supported by the lower high-strength filling body and the lower-strength filling body, prevents the upper filling body from collapsing, and ensures mining safety; While reducing the amount of cement used and reducing the filling cost, the strength of the filling body is improved, and the time spent waiting for the filling material to reach strength is shortened, so as to improve the mining efficiency. At the same time, the performance of the filling body can be adjusted according to the use requirements, and the application range is wide.

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 blank making technology of an aluminum ingot, and relates to the technical field of aluminum ingot processing technologies for remelting. The blank making technology of the aluminum ingot comprises the following steps that S1, molten aluminum is prepared, and specifically, the aluminum ingot is put into an aluminum melting furnace and heated up to be transformed into themolten aluminum; S2, furnace transferring is carried out, and specifically, the molten aluminum is transferred into a holding furnace; S3, heat preservation and temporary storage are carried out, specifically, the temperature in the holding furnace is 700 DEG C-750 DEG C, the intensity of pressure in the furnace is 2-3 times as high as the standard atmospheric pressure, the humidity in the holdingfurnace is no more than 75%, and the heat preservation time is held for 10 min-20 min; S4, pressure casting is carried out, and specifically, the molten aluminum in the holding furnace is injected into a corresponding mould by a die-casting machine after insulation treatment; S5, cooling is carried out, specifically, the mould is taken down and is subjected to the cooling treatment, and the molten aluminum is gradually formed in the mould; and S6, burrs are polished, specifically, the mould is opened, castings are taken out and the burrs on the castings are polished manually, so that workblanks are obtained. According to the blank making technology of the aluminum ingot, quantity of air holes in the workblanks is reduced, and fracture of the workblanks is reduced, so that defective indexis reduced.

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 discloses a construction device for producing super-long concrete structures, which includes a mixing box, and is characterized in that: the mixing box includes a mixing box shell, and a feeding port is arranged above the mixing box shell, and the stirring box shell There is a diverter valve directly in front, and the direct front of the diverter valve is connected to an external water pipe. An antifreeze addition box is installed on one side of the mixing box shell, and a negative pressure valve is installed on the side of the antifreeze addition box close to the mixing box shell. A gas pipeline is arranged between the antifreeze addition box and the diverter valve, and a high water-reducing agent addition box is arranged on the other side of the stirring box shell, and the high water-reducing agent addition box is close to the stirring box shell One side is provided with an overpressure valve, the gas transmission pipeline 2 is provided between the high water-reducing agent addition box and the diverter valve, and the water inlet pipeline 1 is arranged above the diverter valve. The present invention has a wide range of applicable environments and high quality high feature.

The invention relates to the technical field of mining engineering, and specifically discloses a paste filling cementing material and a paste filling slurry. The paste filling cementing material includes the following components in terms of mass percentage: high-alite Portland cement clinker: 55% to 65%, steel slag: 25% to 35%, nano-SiO 2 : 2% ~ 5%, nano-CaCO 3 : 2% to 3%, modified gypsum 2% to 6% and compound admixture 0.1% to 0.5%. The invention uses industrial solid waste steel slag as raw material, has simple process, not only greatly reduces production cost, provides guarantee for green mining of mines, but also provides a new way for comprehensive utilization of industrial solid waste. The paste filling cementing material is used to prepare paste filling slurry, which solves the problems of low early strength of the paste filling material, poor slurry fluidity, high cost and energy consumption, and the like.