5results about How to "High particle strength" patented technology

This invention relates to the field of petroleum proppant production equipment technology, specifically disclosing a petroleum proppant preheating device with a spreading structure, including a spreading box and a preheating pipe. The spreading box is installed on one side of the preheating pipe and is connected to it. The spreading box has a material distribution structure and a material guiding structure inside. The material distribution structure includes an inclined outer cylinder and an inner cylinder. The inner cylinder is divided into multiple screening chambers by an annular partition. Each screening chamber is equipped with a grading screen plate with a different aperture at the bottom. The inner cylinder is equipped with a material agitator to move the material blanks. The material guiding structure is equipped with multiple sets of material guiding components. The material guiding components are equipped with stepped material guiding plates. A spreading wheel is set at the discharge end of the material guiding components. Two gas equalization plates with different apertures are fixed inside the preheating pipe. This invention separates material blanks of different particle sizes through the grading screen plates, sets different lengths of preheating paths through the material guiding components, and spreads the material blanks in layers through the spreading wheel. The gas equalization plates regulate the hot flue gas, so that all kinds of material blanks are heated evenly, reducing the bursting and pulverization of the material blanks during calcination and maintaining the roundness of the particles.

The application discloses a kind of based on aeolian genesis silt's anti-seepage material and preparation method thereof, belong to the field of water conservancy and hydropower engineering.It mainly includes the following weight parts of raw materials: aeolian genesis silt 48~54, gneiss aggregate 40~45 and modified bentonite 6~10.The anti-seepage material based on aeolian genesis silt of the embodiment of the application, gneiss aggregate, as the gravel component of anti-seepage material, is the support skeleton of anti-seepage material, and the particle strength is high, to increase the shear strength and deformation modulus, reduce shrinkage;Using modified bentonite, modified bentonite has stronger adsorption performance and bonding capacity, thereby improving the anti-seepage performance of anti-seepage material.The anti-seepage material based on aeolian genesis silt of the application has excellent anti-seepage effect and high mechanical strength.

The application discloses a method for preparing formed fuel by mixing semi-dried sludge and oil-tea camellia fruit hulls, and the method comprises the following steps: (1) washing and drying the oil-tea camellia fruit hulls, then crushing and sieving the oil-tea camellia fruit hulls to obtain oil-tea camellia fruit hull powder; drying high-moisture sludge to obtain semi-dried sludge; (2) baking the oil-tea camellia fruit hull powder under a mixed atmosphere of oxygen and nitrogen to obtain baked oil-tea camellia fruit hulls, or pyrolyzing the oil-tea camellia fruit hull powder under a nitrogen atmosphere to obtain oil-tea camellia fruit hull biochar; (3) mixing and stirring the semi-dried sludge and the baked oil-tea camellia fruit hulls or the oil-tea camellia fruit hull biochar, uniformly placing water, and then preparing formed fuel. The method is simple, easy to operate and low in cost, the prepared formed fuel particles can realize rapid reduction of urban sludge and recycling of energy, and the method has the advantages of low energy consumption, high particle strength, no pollution and the like when the formed particles are prepared.

The present invention relates to a positive electrode active material for a secondary battery which includes a lithium composite transition metal oxide including Ni, Co, and Mn, wherein the lithium composite transition metal oxide is in the form of a secondary particle, and a glassy coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein, in the lithium composite transition metal oxide, an amount of the Ni in a total amount of transition metals is 60 mol% or more, and an amount of the Mn is greater than an amount of the Co, and the glassy coating layer includes a glassy compound represented by Formula 1.          [Formula 1]     LiaM1bOc wherein in Formula 1, M1 is at least one selected from the group consisting of B, Al, Si, Ti, and P, and 1≤a≤4, 1≤b≤8, and 1≤c≤20.

The invention relates to the technical field of compound fertilizers, and provides a high-temperature-resistant bacteria-containing compound fertilizer and a preparation method thereof.The preparation method comprises the following steps that nanoscale freeze-dried bacterial powder is prepared from bacillus, bacillus stearothermophilus and rhodopseudomonas palustris; mixing the nano TiO2 modified SiO2 composite aerogel, diatomite, the modified charcoal, sepiolite and pullulan to prepare a microbial inoculum protection composite carrier; and mixing the freeze-dried bacterial powder with a carrier, and drying to obtain the micron-sized capsule bacterial agent. Uniformly mixing a reinforcing agent, a plasticizer and a stabilizer to prepare a performance regulator; the preparation method comprises the following steps: melting choline chloride-containing urea and monoammonium phosphate to prepare molten slurry; mixing the molten slurry with a compound fertilizer to form uniform slurry; and mixing the slurry with a micron-sized capsule microbial inoculum and a performance regulator, and granulating to obtain the high-temperature-resistant bacterium-containing compound fertilizer. By optimizing the adaptability of a microbial agent embedding carrier and a melting system, the technical bottleneck of conflict between high-temperature inactivation of the microbial agent and physical properties of a product is solved.