The application of regeneration manganese silicon ball in the steelmaking process

In order to save this part of the raw material, it needs to install a set of alloy sieving device in the steelmaking field before the alloy into the steelmaking hopper, make the qualified alloy powder into the hopper, collect the screened out alloy powder in a special container, and then sieved the alloy powder again, screened out 3mm ~ 5mm particles and 0 ~ 3mm alloy powder. Remelting 3mm ~ 5mm alloy particles in the intermediate frequency electric furnace, because in the remelting process is not adding any other materials, maintaining the original composition of the manganese silicon. After testing, its physical and chemical indicators are in line with the manganese silicon indicators’ requirements. Then press-molded and processed the 0~3mm alloy powder into regenerating silicon manganese ball by certain quality requirements, sent to the steelmaking instead of manganese-silicon for recycling after processing.

Metal powder supplier studied the three alloys for steelmaking -- high-carbon ferromanganese, manganese silicon alloy, ferrosilicon. After screening, made renewable manganese silicon balls products, the sieved out powder of high-carbon ferromanganese and ferrosilicon powder used as adjustment component of major raw materials, the main ingredient of the product is Mn55%-60% Si17%-21%, others remain the same with the original alloy composition, particle size is 20mm~~60mm, through production test and achieved success, can completely replace the same amount of manganese silicon alloy, not only can reduce the environment pollution, enhance enterprises’ capacity for sustainable development, achieve circular economy, can also reduce costs annually.

Regeneration manganese silicon ball’s main ingredient physical and chemical indicators: manganese powder 55%-60%, silica fume 17%-21%, while the recovered silicon manganese alloy, high carbon ferromanganese, ferrosilicon alloy powder determined by laboratory tests, the main component of manganese, silicon is unstable, in manganese silicon alloy powder, manganese powder is generally in the range of 54%-60%, silica fume is 13%-19%; manganese in high carbon manganese ferroalloy powder is generally fluctuate in the region of 58%-63%; silicon powder in ferrosilicon is generally fluctuate in the region of 72% - 78%; other ingredients were stable. Seen from the test results of all kinds of alloy powder, any kind of alloy powder processing directly are difficult to achieve the technical standards of the research results. Therefore, choose manganese-silicon alloy powder as the main raw material for processing, high-carbon ferromanganese, ferrosilicon alloy powder as the adjustment of the raw material for silicon and manganese components.

Steel smelting, consider to the low density alloy sphere, in order to prevent the intractable problem like agglomerating and can not melting in deoxy alloying process, require the use alloy ball smelting steel grades are as follows: the refined steel species (Refining species’ production cycle is longer, can fine-tune alloy in the refining furnace), unrefined low alloy steel kinds, such as Q235B (due to the small amount of alloy, in deoxy-alloying process does not appear intractable issues such as alloy ball agglomerate). The usage mode is the same with the conventional alloys, alloy ball instead of manganese silicon alloy adding in the steel tapping process after furnace, the added amount of other alloys and deoxidizer is normally adding according to the requirement.

Source:http://www.mhcmp.com