2results about How to "Improve dynamic conditions" patented technology

This invention discloses a method for controlling carbon increase in molten steel based on slag system modification, comprising the following steps: S1, smelting endpoint control: controlling the carbon content, phosphorus and sulfur content, and tapping temperature of molten steel at the endpoint of converter or electric furnace smelting; S2, tapping alloying and initial carbon increase: adding a multi-element nitride alloy and a first carbon increaser to the ladle during tapping; S3, argon blowing and stirring: performing a first stage of high-flow-rate argon blowing and stirring; S4, argon blowing station fine-tuning: transporting molten steel to the argon blowing station for sampling and analysis, and supplementing with a second carbon increaser; S5, composition homogenization and soft blowing: sequentially performing a second stage of medium-flow-rate argon blowing and stirring, and a third stage of low-flow-rate soft blowing; wherein the mass percentage of manganese in the multi-element nitride alloy is ≥5%. The advantage of this invention is that by combining optimized alloy composition, segmented carbon increase, and gradient stirring, it achieves precise control of a narrow composition window in molten steel.

The invention relates to the technical field of quartz product production, and discloses quartz weight plasma processing equipment which comprises a melting furnace, a supporting plate and a controller, a furnace cover is installed at the top end of the melting furnace, supporting legs are installed at the bottom end of the melting furnace, the bottom end of the melting furnace is communicated with a slag discharging pipe, and an air suction pipe is communicated with one side, close to the top end, of the melting furnace. According to the device, a quartz weight can rotate while moving up and down in a reciprocating mode in the high-temperature heating and melting process, an upper plasma torch evenly scans and heats the outer surface of the quartz weight from top to bottom and then from bottom to top, heat is rapidly guided in from multiple directions, and therefore the quartz weight can be heated in a high-temperature mode, and the quality of the quartz weight is improved. The thermal stress is greatly reduced, cracking is avoided, the centrifugal force generated during rotation of the quartz weight can effectively discharge bubbles generated during heating of the quartz weight, the optimal dynamic condition is created for bubble discharge, and the bubble content of a finished product is remarkably reduced.