6results about How to "Reduce usage ratio" patented technology

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 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 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.

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 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.