3results about How to "Avoid mass production" patented technology

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%.

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.

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.