Bismuth cored wire

Abstract

The invention discloses a bismuth cored wire. The bismuth cored wire consists of a steel tape sheath and core powder, and is 8 to 20 in diameter or in other diameters or other shapes, the alloy components of the core powder are Ca, Si, S, Fe and Bi, wherein, the content of Ca is 0 to 20 percent by weight, the content of Si is 0 to 15 percent by weight, the content of S is 0 to 10 percent by weight, the content of Fe is 0 to 20 percent by weight, and the content of Bi is 50 to 100 percent by weight. The invention adopts the form of the bismuth cored wire or bismuth composite cored wire, the bismuth cored wire is fed into molten steel by a wire-feeding machine, the recovery rate of bismuth in the molten steel is increased, the cost is reduced, pollution is reduced, moreover, the recovery of bismuth is stable, and component control is accurate.

Description

technical field [0001] The invention relates to an alloy cored wire, in particular to a bismuth cored wire, belonging to the technical field of metallurgy. Background technique [0002] At present, in the production process of iron and steel plants, bismuth blocks or bismuth ingots are usually used to add bismuth to molten steel. The existing problems are: (1) The recovery rate of bismuth in molten steel is low, only 10-30%; ( 2) Recycling is unstable and composition control is difficult; (3) The cost is high, bismuth is calculated at a price of 100,000 yuan / ton, if the bismuth content in steel is 0.1%, the cost of adding bismuth blocks or bismuth ingots is 333-1000 (4) During the process of adding bismuth blocks or bismuth ingots, there is a lot of bismuth vapor overflowing, causing serious pollution. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a bismuth cored wire. The bismuth cored wire is fed into molte...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production process of iron and steel plants, bismuth blocks or bismuth ingots are usually used to add bismuth to molten steel. The existing problems are: (1) molten steel The recovery rate of bismuth is low, only 10-30%; (2) The recovery is unstable, and the composition control is difficult; (3) The cost is high, and the price of bismuth is calculated at 100,000 yuan / ton. If the bismuth content in steel is 0.1 %, the cost of adding bismuth blocks or bismuth ingots is 333 to 1,000 yuan; (4) Bismuth steam overflows a lot during the process of adding bismuth blocks or bismuth ingots, causing great pollution