55results about How to "Increase true density" patented technology

A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-containing oxide obtained by ion exchanging a portion of sodium contained in a cobalt-containing oxide with lithium, the cobalt-containing oxide represented by the formula Li_x1Na_y1Co_αMn_βM_zO_γ where: M is at least one element selected from the group consisting of Mg, Ni, Zr, Mo, W, Al, Cr, V, Ce, Ti, Fe, K, Ca, and In; 0<x1<0.45; 0.66<y1<0.75; 0.62≦α≦0.72; 0.28≦β≦0.38; 0≦z≦0.1; and 1.9≦γ≦2.1.

The present invention relates to a preparation method of high-purity aluminium oxide powder body. It is characterized by that it adopts aluminium sheet whose purity is 99.9999% and organic alkal; and makes them be mutually reacted in hot water bath to obtain the precipitate of aluminium hydroxide, then the precipitate is calcined at 1100-1200deg.C and ground so as to obtain high-purity ultrafine aluminium oxide powder body. The described organic alkal; includes any one of choline, hexamethohydrotetramine and dopamine.

The invention discloses a novel carbon product vibration forming machine, belongs to carbon production equipment, and particularly relates to a device used for carbon product vibration forming. By means of a four-column frame structure in a novel carbon product vibration forming machine, a balance weight lifting system can stably rise and fall, and it is ensured that a die gland arranged on a balance weight is accurately positioned. In the vibration forming process, a vacuum pumping device is started, and therefore air and pitch smoke in a thickener gap are pumped away, the true density of carbon blocks is increased, and cracks are reduced. A die box bottom chamfering die is arranged on the periphery of the bottom of a die box and can execute automatic opening and complete automatic reset along with rising and falling of a die sleeve. An automatic oil mist spraying system can automatically spray oil mist onto the inner wall of the die through an oil mist nozzle arranged on the die box. The balance weight lifting system has a slowly-entering function before block pressing is conducted and has a slowly-retreating function when demolding is started, gas in a clinker gap can be lost in the block pressing process due to the slowly-entering function. Due to the slowly-retreating function, external gas enters the novel carbon product vibration forming machine to damage the vacuum state of the die gland and the carbon block contact face, and the cracks, caused by vacuum suction force when the die gland is lifted, of the carbon block are reduced.

The invention discloses a primer for improving biochemical and purifying efficacy of sewage, comprising the following components in parts by weight: 50-100 parts of carrier, 1-20 parts of biological growth stimulant and 10-150 parts of biological nutritional agent. The invention also discloses a preparation method and an application method of the above primer. The primer of the invention is used in the middle and rear stages for processing structures by an activated sludge method so as to improve the activation of activated sludge and improve purification effect.

The invention relates to a reeling waste water deep treating method and an apparatus, the method comprises the following steps: A) the reeling waste water is passed through a grating well, then enters into an anaerobic pond, sawdust carbon is put into the anaerobic pond; B) effluent from the anaerobic pond enters into an aerobic contacting oxidation pond, the sawdust carbon is put into the anaerobic contacting oxidation pond; C) effluent from the anaerobic contacting oxidation pond enters into a sedimentation pond; naturally deposited activated sludge containing sawdust carbon is directly discharged or performed with backflow to the above anaerobic pond or/and aerobic contacting oxidation pond, a supernatant is lifted in the sedimentation pond to an anaerobic filter for treating; D) effluent from the anaerobic filter enters into a multifunctional biological active carbon tower; and E) effluent from the multifunctional biological active carbon tower enters into a clean water pond for recycling or directly discharging in a silk reeling workshop. The method and the apparatus have the advantages of low operation cost, high circular reuse rate, good water quality, simple operation management and the like, utilization rate of water resource can be increased, pollution of reeling waste water on environment can be mitigated, and the silkworm industry has a good and fast development.

The invention discloses a method for preparing lithium battery anode material by an internal thermal lengthwise graphitization furnace. At first, graphite crucibles are adopted, and are filled with anode material semi-finished products, and crucible covers (4) are tightened up after the anode material semi-finished products are compacted; then, the crucibles are horizontally placed in the internal thermal lengthwise graphitization furnace, and are connected through flexible graphite annuluses, and thermal insulation materials cover the crucibles after the crucibles are loaded in the whole internal thermal lengthwise graphitization furnace; next, the power-on heating operation is carried out, and the heating curve is as follows: the room temperature is 3,200 DEG C and the heating speed is 5 to 8 DEG C/min; and at last, the natural cooling is carried out after the heating is finished, and the graphitization operation is over after the cooling is finished. The graphitization temperature is high, which is beneficial for reducing the special surface area of the anode material, and improving the true density of the material and the initial charging/discharging efficiency. The original production period is about 15 days, and is shortened to 7 days at present, and meanwhile, the energy consumption of the graphitization stage of the product can be reduced.

The invention discloses a process for preparing ceramic membrane support used Alpha-powdered alumina. The manufacturing process is that: after alumina is screened and decontaminated, a compound mineralizer is added to and mixed with alumina, thus preparing alumina mixture; the alumina mixture is put in a high temperature furnace for calcining and phase inversion at 1500 to 1700 DEG C; the mixtureis kept at the temperature for two to fifteen hours; after the mixture is cooled, corundum balls of one to three times of the mixture is added to a ball mill for milling; a finishing agent is added for surface treatment; the obtained product is washed with water and graded before the product is dried at 100 DEG C. The crystal of Alpha alumina is large; the true density of crystal is large; inversion percent of Alpha phase is high; the purity is high; the Alpha-powdered alumina has sintering activity; and the crystal is nearly spherical.

The invention discloses a sewage biological purification agent comprising the following components, by weight: 50-100 parts of a carrier, 1-20 parts of a biological growth stimulant, and 10-150 parts of a biological nutritional agent. The carrier is any one or more selected from diatomaceous earth, activated carbon and zeolite powder. The biological growth stimulant is a mixture of a rare earth element compound and iron salt with a weight ratio of 1: (1-10). The biological nutritional agent is a mixture of glucose and acetate with a weight ratio of (1-20): (1-60), wherein the rights of glucose and sodium acetate are respectively calculated according to the weight of carbon element. The rare earth element compound is one or more selected from nitrate or chloride of lanthanum, cerium and rubidium. The sewage biological purification agent is used in the middle-late section of an active sludge treatment structure, and is used for improving active sludge activity and thus improving the purification effect.

The invention discloses high-compaction iron phosphate and a preparation method of high-compaction lithium iron phosphate. Firstly, ferric hydroxide colloid is prepared; subsequently, the ferric hydroxide colloid is used as a matrix, phosphoric acid and ammonium bicarbonate are added at high temperature, and iron phosphate with smaller primary particles is obtained; meanwhile, a process of removing crystal water from the obtained ferric phosphate dihydrate is carried out; spray drying after slurrying is performed by adopting a glucose solution, and calcining is performed to obtain iron phosphate. The method comprises the following steps: taking high-compaction iron phosphate as a raw material, grinding slurry by adopting a composite carbon source, carrying out spray drying and primary sintering, adding a dispersing agent (polyethylene glycol solution), carrying out spray drying, coating the surface of lithium iron phosphate with the dispersing agent, and sintering at a higher temperature for a shorter time, thereby obtaining the high-compaction lithium iron phosphate. The obtained high-compaction lithium iron phosphate is small in primary particle size, large in BET, less in particle adhesion and easy to grind, and the prepared high-compaction lithium iron phosphate is high in compaction density, small in primary particle size and good in capacity and cycle performance.

The invention provides a self-assembly preparation method of a spherical lithium manganese phosphate positive electrode material. Carbon nano tubes are compounded with the lithium manganese phosphate material, and the conductivity of the lithium manganese phosphate is improved by using ultrahigh conductivity of the carbon nano tubes. According to the method, the carbon nano tubes are taken as crystal nucleuses, spherical lithium manganese phosphate particles are self-assembled and formed from nano lithium manganese phosphate particles through in-situ preparation, and the carbon nano tubes are interpenetrated among spherical secondary particles. The invention also provides a compounded positive electrode material containing the self-assembly spherical lithium manganese phosphate and the carbon nano tubes prepared through the preparation method.

The invention discloses a low-temperature sintered zirconium silicate grinding medium and a preparation method thereof. The low-temperature sintered zirconium silicate grinding medium comprises the following components in parts by weight: 75-90 parts of zirconium silicate, 5-15 parts of Hengyang mud, 1-3 parts of calcium carbonate, 5-15 parts of aluminum oxide, 0.1-1 part of magnesium oxide and 1-10 parts of zirconium oxide. The low-temperature sintered zirconium silicate grinding medium has the advantages of low abrasion, high true density, high hardness and high compressive strength and has rather ideal economic and social benefits.

The invention provides a calcined petroleum coke rotary kiln, including a drying device and a rotary kiln. The drying device comprises a cylinder body, and a feeding port and a discharge port, which are arranged respectively on the front end and the rear end of the cylinder body; and the front end of the cylinder body is also provided with a high temperature flue gas chamber. The rotary kiln comprises a kiln rotary kiln body, a feed chute and a rotary induced draught fan, which are arranged on the feed end of the rotary kiln body, and a fuel nozzle and a fuel air blower, which are arranged at the discharge end of the rotary kiln body; and the middle section of the rotary kiln body is provided with at least two kiln air blowers. The discharge port of the cylinder body is connected with the feed chute of the rotary kiln. The invention has the beneficial effects that the calcined petroleum coke rotary kiln has large output and small burning loss of the calcined petroleum coke, does not consume extra fuel for normal production, significantly reduces petroleum coke burning loss, enhances the true density of the calcined petroleum coke, reduces ash and improves the quality of the calcined petroleum coke.

The invention relates to a coking method for coal-oil mixed pitch. The coking method comprises the following steps: coal pitch and oil pitch are mixed in accordance to appropriate proportion and pretreated under certain condition to prepare refined pitch; the refined pitch is taken as a preparation raw material for needle coke; the characteristics of the coal pitch such as macromolecular aromatics structure and being capable of forming favorable organization structure are fully utilized and lower impurity content of the oil pitch, particularly lower QI content and impurity atom content as well as the cross-linked effect of micro-molecules are combined. According to the coking method, the negative influence caused by too much impurities and light constituent in the oil pitch is effectively avoided, the quality level of green coke is effectively improved, the carbon content is improved, the volatile component and ash content are reduced, therefore, the obtained needle coke is low in impurity content, favorable in organization structure, simultaneously procedures in the whole coking process is simple and the operation is convenient.

The invention relates to a high-compaction-density and high-first-effect ternary positive electrode material and a preparation method thereof, the theoretical chemical expression of the high-compaction-density and high-first-effect ternary positive electrode material is Li<1-a> baNi<0.8>Co<0.1>Mn<0.1>O<2>, and a is greater than or equal to 0.001 and less than or equal to 0.1. The preparation method of the ternary positive electrode material is characterized by comprising: mixing a nickel source, a cobalt source and a manganese source according to a certain proportion; obtaining a ternary material mixture; adding the mixture into water according to a certain proportion to obtain a water phase; introducing ammonia gas, adding an oil phase, preparing a precursor by using a reversed-phase microemulsion method; and uniformly mixing and sintering the precursor, a lithium source and rubidium salt at a certain temperature to obtain a high-compaction-density rubidium ion doped material with uniform particle size, replacing lithium ions in the ternary material in a rubidium ion doping manner, and enabling an active material to be in better contact, so that the ternary material has better compaction density and higher charge-discharge first effect.

The invention discloses a preparation method of an alumina milling balll. The preparation method comprises the following steps: 1) sieving aluminum oxide powder with the purity of more than or equal to 99.995%, the particle size D50 value of 0.6-1.0 [mu]m and the specific surface area of less than or equal to 8 m<2>/g to obtain sieved aluminum oxide powder; 2) collecting the sieved alumina powder,adding pure water accounting for 5-20% of the weight of the sieved alumina powder, and preparing ball seeds in a ball forming machine, when the particle size of the ball seeds reaches 0.1-0.3 mm, adding sieved aluminum oxide powder on the ball seeds in the ball forming machine to start to grow balls, when the ball diameter is increased to 0.5-0.6 mm, adjusting the rolling moving track of the ball, and adding sieved alumina powder to continuously grow the ball, when the ball diameter is increased to 0.7-0.8 mm, adjusting the rolling moving track of the ball, and adding sieved aluminum oxide powder to grow the ball continuosuly, when the ball diameter is increased to 0.8-0.9 mm and the apparent density of the alumina ball after ball repairing and pressing reaches 1.5 g/cm<3> or above, drying and sintering the balls at 1300-1400 DEG C for 15-25 hours to obtain the alumina milling ball. The alumina milling ball has the characteristics of high purity, low abrasion, high strength and smoothand round surface.

The invention relates to an organic phosphide flame retardant as well as a preparation method and an application thereof. The technical problem that a halogen-free flame retardant is low in stacking density and true density is solved. The organic phosphide flame retardant is obtained by dropwise adding one or more of dialkyl hypophosphorous acid, monoalkyl hypophosphorous acid, alkoxy hypophosphorous acid and dialkoxy hypophosphorous acid and hypophosphorous acid into at least one of 2-8 valent metal oxide or metal hydroxide for a reaction, or dropwise adding one or more of a dialkyl hypophosphorous acid soluble salt solution, a monoalkyl hypophosphite soluble salt solution, an alkoxy hypophosphorous acid soluble salt solution and a dialkoxy hypophosphorous acid soluble salt solution intoa 2-8 valent metal non-halogen soluble salt solution for the reaction to obtain the product. The method can be widely applied to the technical field of flame retardants.