Ferro silicon barium is an inoculant for casting and a deoxidizer for steelmaking. When used as an inoculant for casting, it can promote the formation of A-type graphite, refine the eutectic group, improve the distribution of graphite, and improve the anti-recession ability, and can eliminate and prevent the whitening tendency of castings, reduce the sensitivity of the section, when the silicon-barium inoculant is used as a deoxidizer in steelmaking, there is no smoke, no spark, the deoxidation effect is higher than that of silicon-calcium alloy, and it can improve the The morphology of metal inclusions improves the quality of steel. At present, the production of silicon-barium inoculants in China and abroad generally adopts the production of ferrosilicon in submerged arc furnaces, and then adds ferrosilicon and barium-containing raw materials into the intermediate frequency furnace. Silicon barium inoculant replaces 75% ferrosilicon as inoculant, and its economic benefits will be huge.
The silicon–barium inoculant is smelted in a submerged arc furnace at one time, and this process is carried out on the basis of smelting 75% ferrosilicon. When producing this product, it is first required that the original 75% ferrosilicon furnace is in normal condition, and the aluminum content should be controlled below 2%. Mix barite, limestone, and calcium carbide evenly in proportion, and place them in the three electrodes respectively. At the hearth, mix it evenly with 75% ferrosilicon material. Within 1.5 hours of each tapping (one furnace of iron every 2 hours), add the above-mentioned mixed charge into the furnace in batches and stages, and prevent sparks during smelting. Regarding the furnace construction, start-up and shutdown process, it is the same as the 75% ferrosilicon process.
Process flow: Mix the qualified coke, silica, steel shavings, and check the weight, and then supply the mixture to the furnace platform. The above mixture is mixed with barite, limestone and radio, and then added to the electric furnace to smelt the molten iron ingot, and the chemical composition is sampled and analyzed. Qualified products are finely broken, packaged and put into storage, and unqualified products are re-smelted. The raw materials of silicon-barium inoculant consist of 10-400 kg of barite, 500-600 kg of silica, 0-50 kg of calcium carbide, 450-550 kg of coke, 65-85 kg of steel scrap, and 5-10 kg of limestone.
The requirements for the above raw materials are the same as those for smelting 75% ferrosilicon for silica, coke, and steel shavings. Barite should contain more than 70% BaSO4, with a particle size of 40-60m/m, no soil, no inclusions, and anti-knock performance. Well, limestone contains more than 51% CaO, particle size is 30-40m/m, calcium carbide contains more than 70% CaC2, particle size is 30-40m/m and is not pulverized, and the chemical composition range of silicon-barium inoculant is Ba0-30%Si0-70%, Ca0 -4%, Al is less than 2%.
Without adding new equipment, silicon-barium inoculants can be produced in a submerged arc furnace at one time, which significantly reduces the unit power consumption from 14,000 degrees per ton to 8,600 degrees, and the product cost is greatly reduced. The amount of silicon-barium inoculant added is only one third of that of 75% ferrosilicon, and it improves the quality of castings, and solves the uneven strength caused by large wall thickness difference and the inoculation caused by the limitation of production layout and the length of pouring process. Recession and other problems, improve product quality.
The optimal ratio of silicon-barium inoculant is 600 kg of silica, 400 kg of barite, 2 kg of calcium carbide, 500 kg of coke, 5 kg of limestone, and 80 kg of steel shavings. Lishi Industrial can provide high-quality-guaranteed ferro silicon barium inoculants with professional after-sale technical support, we accepted any customized specifications and third-party inspection. The timely and abundant supply of our materials will never stop your production. Look forward to your inquiry and start our cooperation in the nearest future.