8results about How to "Easy production control" patented technology

The invention belongs to the technical field of sugar alcohol preparation, and relates to a preparation method of anhydrous lactitol crystals with controllable granularity, which comprises the following steps: putting a lactitol concentrated solution with the refraction of 80-82% and the temperature of 75-80 DEG C into a crystallizer, and then cooling at the cooling rate of 0.5-1 DEG C / min; when the temperature is reduced until crystals are separated out, cooling is stopped, the current temperature is maintained for 1-4 h, then the cooling rate is adjusted to be 1-1.5 DEG C / min, and cooling continues; when the temperature is reduced to 20-30 DEG C, stopping cooling, and maintaining the current temperature to grow the crystal for 1-3 hours to obtain massecuite; centrifuging the massecuite to obtain wet sugar; feeding the wet sugar into an air dry oven, drying for 1 hour with hot air at the temperature of 50-60 DEG C, slowly heating to 85-90 DEG C at the speed of 5-10 DEG C / h, staying for 1 hour, slowly heating to 105-115 DEG C at the speed of 5-10 DEG C / h, and staying for 1 hour again, so as to obtain the anhydrous lactitol crystal. The anhydrous lactitol is prepared by adopting gradient cooling crystallization and gradient heating drying modes, the anhydrous lactitol crystal with controllable particle size distribution is obtained, and the production difficulty is greatly reduced.

The invention provides a protective armor plate and a preparation method thereof. The protective armor plate provided by the invention comprises a back plate and a panel compounded on the surface of the back plate, wherein the panel comprises a plurality of B4C ceramic unit plates; the plurality of B4C ceramic unit plates are arranged in an array, the adjacent B4C ceramic unit plates are arranged at intervals, and aluminum pieces are filled between the adjacent B4C ceramic unit plates and on the peripheries of the B4C ceramic unit plates; and one of the two side surfaces in the length direction of the aluminum piece is connected with the back plate. The protective armor plate can achieve weight reduction and efficient bulletproof at the same time.

The application provides a copper-iron mineral flotation inhibitor and a preparation method thereof, which comprises the following steps: adding water, o-aminobenzoic acid and hydrochloric acid into a reaction kettle, controlling the temperature in the reaction kettle to be 2-6 DEG C; adding sodium nitrite and sodium sulfite solution into the reaction kettle in sequence to carry out reaction; after the reaction is completed, the temperature in the reaction kettle is increased to 120-180 DEG C to continue the reaction for a predetermined time; after the reaction is completed, the temperature in the reaction kettle is decreased to 40-60 DEG C, tannic acid is added to carry out reaction, and finally the temperature is cooled to normal temperature, so the copper-iron mineral flotation inhibitor is obtained. The copper-iron mineral flotation inhibitor prepared by the application can be used as the inhibitor of copper-iron minerals in molybdenum ore and copper-molybdenum ore flotation, can effectively inhibit the copper sulfide mineral and the iron sulfide mineral, has the characteristics of small dosage and high efficiency of molybdenum mineral flotation under low alkalinity condition, and is convenient to control, has no by-product in the preparation process, and will not cause environmental pollution in production.

The present invention discloses an LED power supply constant power input control circuit, which mainly includes: an LED driving power supply constant current control circuit, which is used to adjust the current value in the sampling resistor according to the grid voltage to ensure the output current constant current; an LED driving power supply constant power input control circuit, which is used to adjust the output current of the LED driving power supply constant current control circuit according to the LED lamp bead voltage to keep the input power constant. The LED power supply constant power input control circuit of the present invention can automatically adjust the current of the lamp bead according to the lamp bead voltage to maintain constant power input, which not only meets the user's demand for stable lighting, but also facilitates the advantages of production control by manufacturers.

The present invention discloses a high-strength white facing concrete and a preparation method thereof, and relates to the technical field of building materials; the concrete comprises white cement, white high-activity mineral admixture, limestone machine-made sand, limestone crushed stone, water, viscosity-reducing admixture, carbonation inhibition auxiliary agent and functional defoamer. The present invention also provides a preparation method of the above concrete. The concrete of the present invention has good aesthetic and decorative effects, eliminates the processes of coating and facing, meets the needs of low-carbon green development, and effectively solves the problems of concrete bubbles, inconsistent color, voids, cracks and poor carbonation resistance in the prior art.

The application discloses a kind of liquid lithium battery negative pole coating material and preparation method thereof, belong to lithium battery negative pole material technical field.The application uses ethylene tar as raw material, sequentially through filtration, distillation, polymerization, blending process, produce the liquid lithium battery negative pole coating material provided by the application is used for the coating treatment of lithium battery graphite negative pole material, can be fully wetted with graphite negative pole material, bonding;The "core-shell" structure formed after the graphite negative pole material is treated using the liquid coating material, including core and the coating layer coated on the surface of core.Coating layer is firm, stable, and presents uniformity.The liquid lithium battery negative pole coating material is in liquid state at normal temperature, and has good flowability;Coking value is higher;It is easy to store, convenient for transportation and use.

The present invention provides a method for recovering cobalt precipitate from the liquid after iron and aluminum removal from copper-cobalt ore. The method comprises: step S1, mixing the liquid after iron and aluminum removal with a first alkaline solution for precipitation reaction, and concentrating and separating the obtained precipitation slurry to obtain a cobalt precipitation overflow and a cobalt precipitation underflow; step S2, dividing the underflow into two parts, adding a second alkaline solution to the first underflow for activation and conversion, returning the obtained activated ore slurry to step S1 to replace the first alkaline solution, and filtering and washing the second underflow; step S3, mixing the first cobalt precipitation overflow with the first alkaline solution, and performing precipitation reaction, concentrating and separating the precipitation slurry obtained by the precipitation reaction to obtain a cobalt precipitation underflow; step S4, dividing the cobalt precipitation underflow into two parts, adding a third alkaline solution to the first underflow for activation and conversion, returning the obtained activated ore slurry to step S3 to replace the first alkaline solution, and filtering and washing the second underflow. The product has large particle size and low water content.

The utility model discloses a real-time pipeline temperature monitoring device for a paperboard deckle edge crusher, belongs to the technical field of crusher pipeline monitoring, and solves the problem that natural potential safety hazards exist in a conveying pipeline of an existing crusher. The device comprises an electric appliance box installed indoors and an equipment control cabinet installed on one side of the crusher, an air switch is arranged in the electric appliance box, the air switch is electrically connected with a temperature control instrument, the temperature control instrument is installed in the equipment control cabinet, an alarm device electrically connected with the temperature control instrument is arranged at the top of the temperature control instrument, and the temperature control instrument is installed in the equipment control cabinet. One side of the temperature controller is provided with a normally-closed button switch used for controlling the device to start or stop, and the bottom of the temperature controller is provided with a threading pipe extending towards the shredded paper conveying pipe. According to the device for monitoring the pipeline temperature in real time for the paperboard deckle edge crusher, temperature abnormity of a conveying pipeline can be quickly found, and potential safety hazards are reduced.