14results about How to "Reduce usage ratio" patented technology

The invention discloses a mine filling cementing material and a preparation method thereof. The mine filling cementing material comprises the following components in percentage by mass: 3-8 wt% of high belite sulphoaluminate cement clinker; 1-3 wt% of high free calcium silicate cement clinker; 74 to 85 wt% of granulated blast furnace slag powder or granulated blast furnace slag; and 10 to 18 wt% of gypsum. Compared with other paste filling materials with the same strength, the cementing material solves the problems that in the prior art, a mine filling cementing material is poor in excitation effect and poor in mechanical property, so that the mine filling effect is affected, and the cost is high due to the fact that the using amount of the cementing material is large, and meanwhile the using proportion is reduced; and the use of mine backfill engineering is fully met.

The invention provides a method and a system for preparing low-carbon cement by grading gradient utilization of coal gasification ash. The method comprises the following steps: dividing the coal gasification ash into carbon-rich ash, medium-carbon ash and carbon-poor ash according to the carbon content; feeding the carbon-rich ash and feed coal into a pulverized coal preparation workshop to prepare a first mixture serving as clinker calcination fuel; metering the medium-carbon ash residue, feeding the medium-carbon ash residue and other raw material components into a raw material preparation workshop, and grinding and drying; decomposing and calcining the uniformly mixed second mixture, and cooling to obtain clinker; and feeding a mixture of the clinker, other cement components and carbon-poor ash into a cement preparation workshop to prepare finished cement. Coal gasification ash materials with different characteristics are obtained by grading the carbon content of the coal gasification ash, and are respectively used in three process sections of cement raw material grinding, clinker calcining and cement grinding in combination with the characteristics of a cement production process, so that the coal gasification ash realizes large-dosage and large-scale utilization in the aspect of building material resources; the carbon emission in the cement clinker production process is reduced.

The application provides a method and system for preparing low-carbon cement by using coal gasification ash in a graded manner, and the method comprises the following steps: dividing the coal gasification ash into carbon-rich ash, medium-carbon ash and carbon-poor ash according to the carbon content; feeding the carbon-rich ash and raw coal into a coal powder preparation workshop to prepare a first mixture as a clinker calcination fuel; feeding the medium-carbon ash into a raw material preparation workshop after metering to be ground and dried together with other raw material components; preparing clinker by decomposing and calcining the second mixture after mixing uniformly and cooling; feeding the mixture of the clinker and other cement components and the carbon-poor ash into a cement preparation workshop to prepare finished cement. The carbon content of the coal gasification ash is divided in a graded manner to obtain coal gasification ash materials with different characteristics, and the cement production process characteristics are combined to be used in three process sections of raw material grinding, clinker calcination and cement grinding, so that the coal gasification ash is used in a large amount and in a large scale in the building material resources, and the carbon emission in the cement clinker production process is reduced.

The invention relates to the technical field of steel wire rods, and discloses a corrosion-resistant low-carbon steel wire rod with deformation performance and a preparation process thereof.The corrosion-resistant low-carbon steel wire rod comprises 0.04%-0.15% of C, 0.7%-0.9% of Mn, 0.05%-0.14% of Si, 0.015%-0.02% of P, 0.02%-0.07% of S, 0.02%-0.03% of Cr, 0.02%-0.03% of Ni, 0.008%-0.025% of Al, 0.03%-0.04% of Si, 0.056%-0.068% of Cu, 0.0024%-0.0038% of S0, 0.25%-0.30% of Mn, 0.015%-0.025% of Als, 0.007%-0.009% of Ce, 0.004%-0.006% of La and the balance Fe and inevitable impurities. By means of the process, the steel wire rods are stably produced in batches, the steel wire with the excellent surface quality and the zinc coating is obtained, the steel wire rod is suitable for being erected in coastal areas and areas with industrial pollution or heavy salt mist, not prone to corrosion and long in service life, the production raw materials are researched and improved, the steel wire rods are improved fundamentally, and the production cost is reduced. The use efficiency of the steel wire rod is greatly improved, and the deformation performance and the corrosion resistance of the steel wire rod are improved.

The application provides an electric vehicle charging control method and device based on an electronic fence. The method comprises the following steps: obtaining electronic fence association information sent by a platform end, determining an electronic fence area state and an area information platform synchronization state based on the electronic fence association information; obtaining a position signal state of a positioning module of a vehicle; sending the electronic fence area state, the area information platform synchronization state and the position signal state, and a tag electronic fence entry judgment result to a vehicle controller, so that the vehicle controller determines whether to output a charging restriction strategy instruction to a battery management system, so that the vehicle charges the battery according to the charging restriction strategy instruction when entering a target electronic fence in a mountain top area, and the vehicle can continue to charge the battery by energy recovery through electric braking during the process of descending the mountain after charging the battery at the mountain top.

The invention discloses a semi-solid lithium ion battery, which comprises a positive electrode, a negative electrode, a positive electrode, a negative electrode and a positive electrode, the formula of the positive electrode comprises 90%-98% of an active substance, 2%-6% of a solid electrolyte, 0.5%-2% of a conductive agent and 0.5%-3% of an adhesive; the formula of the negative electrode comprises 90%-98% of an active substance, 1%-5% of a thickening agent, 0.5%-2% of a conductive agent and 1%-3% of an adhesive; the diaphragm is coated with a 2C + 12 + 2LATP coating; and a high-concentration electrolyte with a lithium salt concentration of 3.0 to 3.5 mol. According to the semi-solid-state lithium ion battery, an optimized positive electrode and negative electrode material formula is adopted, and a proper amount of solid electrolyte is added into the positive electrode and the negative electrode, so that the ionic conductivity and the thermal stability of the battery are further improved. And moreover, by using the high-concentration lithium salt electrolyte and the improved diaphragm technology, the battery has better electrochemical performance and longer cycle life in the charge-discharge process.

The invention is suitable for the technical field of coal, and provides a coal proportion analysis system and analysis method, after coal proportion analysis, the production cost is reduced, and by optimizing a coal blending structure and reducing the use proportion of high-quality coking coal, the coal blending cost can be remarkably reduced, the coal blending efficiency is improved, and the coal blending efficiency and accuracy are improved. The coal blending system improves the working efficiency, reduces the environmental pollution, optimizes the coal blending process, reduces the cost, improves the market competitiveness of coal products, systematically collects and analyzes the characteristic data of each single coal, provides accurate data support for the reasonable utilization and scientific research of the coal, and improves the economic benefit through comprehensive utilization and process optimization. The method can significantly improve the utilization efficiency and environmental protection performance of coal, and can effectively analyze and control the chlorine ion content in a coal firing water system, thereby ensuring the stable operation of a desulfurization system and meeting the environmental protection requirements.

The invention provides an ultra-short-focus projection lens and projection equipment, and belongs to the technical field of optical imaging. The ultra-short-focus projection lens comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with negative focal power, an eighth lens with positive focal power and a ninth lens with negative focal power. The system comprises a tenth lens with negative focal power, an eleventh lens with positive focal power, a twelfth lens with positive focal power, a thirteenth lens with positive focal power, a fourteenth lens with negative focal power, a fifteenth lens with negative focal power, a sixteenth lens with negative focal power and a concave reflector, therefore, the total optical length of the ultra-short-focus projection lens is controlled within 300mm, and the definition reaches 8K and above. According to the scheme, the ultra-short-focus projection lens which is small in size, high in resolution and good in athermalization is realized.

The utility model provides a long-focus projection optical system and projection equipment, and belongs to the technical field of optical imaging. The long-focus projection optical system comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with negative focal power and an eighth lens with positive focal power. The long-focus projection optical system comprises a first lens with a positive focal power, a second lens with a positive focal power, a third lens with a positive focal power, a ninth lens with a positive focal power, a tenth lens with a positive focal power and a light valve, so that the total optical length of the long-focus projection optical system is controlled within 76.85 mm, the definition reaches more than 1080P, and the aperture value is 2.0-2.6; wherein the first lens is a plastic aspheric lens, and the other lenses are spherical lenses. According to the scheme, the ten lenses are adopted, and the focal power and the shape matching relation of the lenses are reasonably set, so that the long-focus projection optical system which is small in size, high in resolution, low in cost, small in projection ratio and free of virtual focus at high temperature is realized.

This invention discloses a mine backfill cementitious material and its preparation method. The mine backfill cementitious material of this invention comprises the following components in the following mass ratios: high belite sulfoaluminate cement clinker: 3-8 wt%; high free calcium silicate cement clinker: 1-3 wt%; granulated blast furnace slag powder or granulated blast furnace slag: 74-85 wt%; gypsum: 10-18 wt%. Compared with other paste-like backfill materials of the same strength, the cementitious material of this invention solves the problems of poor activation effect, poor mechanical properties affecting the mine backfilling effect, and high cost due to large amount of cementitious material used in existing mine backfill cementitious materials. At the same time, it not only reduces the proportion of cementitious material used, but also fully meets the requirements of mine backfilling projects.

The application provides application of a modified starch-based material in retarding of a high-temperature oil well cement system, and belongs to the technical field of oil well cementing cement. Octenyl succinic anhydride modified starch is added to the oil well cement slurry system, wherein the addition amount of the octenyl succinic anhydride modified starch is 0.1% to 2.0% of the cement mass. The modified starch is added to the oil well cement slurry system in an amount of 0.1% to 2.0% of the cement mass, can effectively delay the cement slurry thickening process under the high-temperature cementing condition of 90 to 150 DEG C, keep the thickening curve stable, reduce the risk of abnormal gelation, and has little adverse effect on the rheological property of the cement slurry and the mechanical property of the cement stone in the later period. The modified starch material is derived from renewable natural polymer resources, has the characteristics of environmental friendliness and stable retarding effect, and is suitable for cementing operation of deep and ultra-deep oil and gas wells.

The embodiment of the present application provides a method, device and storage medium for calculating the antenna downtilt angle, the method comprising: obtaining the cell information covered by all base stations in the target geographical area; determining the main service cell in the target geographical area according to the signal strength of each cell and the path loss of each cell, and determining the adjacent cell set, wherein the adjacent cell set refers to the cell set formed by multiple cells within the maximum search distance from the main service cell; determining the target cell to be signal strength optimized according to the directional signal strength in the coverage direction of each main service cell in the first base station; obtaining the coverage distance of the target cell; and obtaining the first downtilt angle of the target cell antenna according to the station height of the target cell antenna and the coverage distance of the target cell. This solution can significantly improve the accuracy and speed of downtilt angle calculation.

The invention relates to the field of material science and engineering, and particularly discloses a freeze-dried ginseng, dried tangerine peel and bamboo white tea block. The method comprises the following steps: firstly, performing quality-divided extraction, performing high-temperature extraction on ginseng and cordyceps militaris, performing low-temperature extraction on big bamboo white tea, and separating to obtain pericarpium citri reticulatae volatile oil; combining the water-phase extracting solutions, adding the pericarpium citri reticulatae volatile oil, and emulsifying and homogenizing to form a stable oil-in-water emulsion system; and finally, injecting the emulsified material liquid into a mold, and performing vacuum freeze drying to obtain a finished product. Through differential temperature control, the problem of active ingredient loss caused by different heat sensitivities of multi-component raw materials is solved; the uniform dispersion and in-situ embedding of the fat-soluble volatile oil are realized by utilizing a high-shear emulsification technology, and the layering of feed liquid and the oxidation of grease are prevented; and by constructing an endogenous solid framework, the second-speed rehydration of the product is realized under the condition of no exogenous excipient, the retention rate of the active ingredients of the obtained freeze-dried block is high, and the redissolved solution is uniform and clear and has excellent stability.

The present invention discloses a medium salt concentration electrolyte for lithium-sulfur batteries, the electrolyte containing a mixed lithium salt, a first and second ether solvents and a double ether-fluorinated ether tri-solvent system formed by at least one fluorinated ether solvent; the mixed lithium salt contains a lithium salt that can form a passivation film on a lithium metal negative electrode; the oxygen coordination steric hindrance of the first ether solvent is small (the number of carbon atoms / oxygen atoms in the molecule is ≤4), and the lithium salt can be dissociated; the oxygen coordination steric hindrance of the second ether solvent is large (the number of carbon atoms / oxygen atoms in the molecule is ≥5), and the salt concentration and the viscosity of the electrolyte can be reduced; the fluorinated ether solvent can further reduce the lithium salt concentration and improve the miscibility of the electrolyte, and its fluorinated group can promote the formation of a stable lithium metal negative electrode passivation layer, thereby improving the deposition and stripping efficiency of the negative electrode metal. The electrolyte provided by the present invention can be used to assemble a lithium battery, and the assembled lithium battery has a long cycle life, a weak self-discharge effect, high conductivity, low viscosity, good wettability, and has a high commercial application value.