8results about How to "Avoid mass production" patented technology

The invention provides a preparation method of micro low-oxygen spherical TiAl alloy powder, and relates to the technical field of spherical titanium-based alloy powder. The preparation method comprises the steps of raw material selection and treatment of a wire material, preparation of a TiAl composite wire, preparation of a TiAl alloy wire, treatment of the TiAl alloy wire, establishment of a gas system, high-frequency induction preheating, radio frequency plasma smelting and atomization powder preparation which are sequentially carried out. According to the method, through multiple wire twisting, multiple continuous hot drawing, diffusion homogenization annealing, high-frequency induction preheating, radio frequency plasma smelting and atomization powder preparation, the TiAl alloy wire with the evenly-distributed components can be directly prepared at the low temperature, then the TiAl alloy fine powder with the low oxygen content and the evenly-distributed components is prepared, the TiAl alloy fine powder is suitable for additive manufacturing, and the method is suitable for being used for additive manufacturing. The method is high in flexibility, simple to operate, wide in application, low in cost and very suitable for large-scale industrial production.

The invention provides a preparation method of fine low-oxygen spherical Ti-based high-entropy alloy powder, and relates to the technical field of spherical titanium-based alloy powder. The preparation method comprises the steps of raw material selection and treatment of the wire, preparation of the pre-alloyed wire, preparation of the titanium-based high-entropy alloy wire, treatment of the titanium-based high-entropy alloy wire, establishment of a gas system, high-frequency induction preheating, radio frequency plasma smelting and atomization pulverization which are carried out in sequence. Through multiple wire twisting, multiple continuous hot drawing, diffusion homogenization annealing, high-frequency induction preheating, radio frequency plasma smelting and atomization powder preparation, the Ti-based high-entropy alloy wire with uniform component distribution can be directly prepared at a low temperature, then the Ti-based high-entropy alloy fine powder with low oxygen content and uniform component distribution is prepared, and the Ti-based high-entropy alloy fine powder is suitable for additive manufacturing and has good application prospects. The method is high in flexibility, simple to operate, wide in application, low in cost and very suitable for large-scale industrial production.

This invention discloses a method for controlling sulfides in sulfur-containing gear steel, belonging to the field of metallurgical technology, including converter, LF refining, RH refining, and continuous casting processes. Converter process: molten steel tapping temperature 1630±20℃, carbon-oxygen product controlled below 0.0020; LF refining process: aluminum content in molten steel controlled at 0.035-0.045%, LF slag composition adjusted to R: 1.5-2.5, FeO+MnO: 1.0-2.0%; RH refining process: ferrotitanium added in one step to adjust the composition appropriately; Continuous casting process: argon-blown stopper rods and submerged entry nozzles are used for continuous casting, and 150-200 kg of low-basicity tundish covering agent is added to the tundish. The sulfur-containing gear steel produced by this invention can be continuously drawn for more than 10 heats, and the level of Class A inclusions can be stably controlled at A coarse ≤ 1.0 grade and A fine ≤ 1.5 grade, with a pass rate of over 99.9%.

The invention discloses a wet garbage pyrolysis treatment device which comprises a feeding and gas producing structure, a cracking structure, a heating structure, a heat preservation structure, a charcoal collecting structure and a driving part, the cracking structure, the heating structure and the heat preservation structure are arranged from inside to outside, and the feeding and gas producing structure is located at the top of the heat preservation structure; the biochar collecting structure is located at the bottom of the interior of the cracking structure, the driving part is arranged on one side of the exterior of the heat preservation structure, the output end of the driving part penetrates through the heat preservation structure to be connected with the cracking structure, and the device has the advantages of being high in treatment efficiency, small in secondary pollutant generation amount and the like.

This application provides a positive electrode active material, a method for preparing the same, a secondary battery, and an electrical device. The positive electrode active material comprises a polyanionic compound having the general formula shown in Formula I. The crystallinity of the positive electrode active material is 0.8–1, wherein M includes at least one of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Sn, Hf, Ta, W, and Pb; 1≤x≤7, 1≤y1+y2≤4, 1≤z≤2, and 1≤k≤4. This positive electrode active material has a high degree of crystallinity, which is beneficial for improving the initial discharge capacity of the battery.

This invention discloses a high-porosity antibacterial and repairing Bletilla striata polysaccharide gel mask and its preparation process, belonging to the field of skin care materials and medical aesthetic dressings. The raw materials are only Bletilla striata polysaccharide (BSP), polyvinyl alcohol 1799, and deionized water, without chemical crosslinking agents or preservatives. The Box Behnken response surface methodology was used to optimize the 70℃ blending process, with a BSP to PVA dry basis mass ratio of 5:10 and a total solute mass fraction of 6.5%. After ultrasonic degassing, the mixture is injected into a mold and set at -20℃ for 12 hours, without the need for ultra-low temperature freeze-thaw cycles. The resulting substrate exhibits an inhibition zone of 3.42±0.11 mm against Escherichia coli and 2.81±0.11 mm against Staphylococcus aureus, with a porosity of 66.7%, a swelling ratio of 175.0%, a gel strength of 3389.2 g∙cm, and excellent moisture permeability. SEM shows a continuous multi-level interconnected porous structure, and FTIR confirms that BSP and PVA are hydrogen-bonded together, fully preserving the antibacterial activity. This invention requires only a -20℃ refrigerator, has low equipment requirements, and is easy to scale up production; the mask is soft, breathable, and fits well without causing acne, relying on Bletilla striata polysaccharides to naturally inhibit acne-causing bacteria, and is suitable for oil control of acne-prone skin, moisturizing of sensitive skin, and soothing and repair after medical aesthetic procedures.

The invention discloses a method for preparing high-purity iron phosphate from red mud, which comprises the following steps: (1) grinding the red mud to obtain red mud powder with predetermined fineness; (2) adding the red mud powder into mixed acid, carrying out acid leaching treatment at 30-50 DEG C, carrying out ultrasonic treatment assisted in the acid leaching process to obtain a leaching mixed solution, and carrying out solid-liquid separation on the leaching mixed solution to obtain leaching residues and a leaching solution containing iron ions; the mixed acid is a mixed solution of hydrochloric acid, oxalic acid and phosphoric acid, the molar ratio of hydrochloric acid to oxalic acid is (2-5): (2-5), and the ratio of the amount of phosphoric acid substance to the amount of iron substance in the red mud is (0.9-1.2): 1; the molar concentration of H < + > in the mixed acid solution is 4-10 mol / L; (3) adjusting the pH value of the leachate, carrying out auxiliary stirring reaction under a set temperature condition, and then aging and filtering to obtain crude iron phosphate and filtrate; and (4) calcining the crude iron phosphate, and cooling to obtain the battery-grade iron phosphate. Through innovative acid dissolution and precipitation process design, iron resources in the red mud are fully extracted and recycled and are converted into high-purity iron phosphate products.

The utility model relates to a kind of high-efficiency coiling machine, including coiling box, coiling box includes first coiling roller, second coiling roller, coiling knife and side plate unit, the front end of coiling knife is aligned with the roller passage formed between first coiling roller, second coiling roller, side plate unit includes first servo motor, air cylinder, gear set, long side plate and copper side plate, by using above-mentioned technical scheme, filament bundle is entered into roller passage by coiling knife, completes coiling work under the cooperation of first coiling roller and second coiling roller, first servo motor drives gear set to rotate, to drive copper side plate to rotate, air cylinder is used to pressurize copper side plate, to seal first coiling roller and second coiling roller clamping point, to realize that first servo motor drives copper side plate to do rotating motion, after copper side plate friction, copper side plate will turn an angle, so it can extend the period of copper side plate replacement, avoid the mass production of waste silk and improve production efficiency.