A ferrosilicon or ferrochrome ingot casting machine

Abstract

The invention discloses a ferrosilicon or ferrochrome ingot casting machine and an ingot mold alloy thereof. The machine comprises a circulation track, and n ingot molds with numbers from 1 to the n,wherein the first ingot mold to the tenth ingot mold are head molds; and each head mold is an alloy mold composed of the following elements of, in percentage by weight, 3-5% of Mn, 1-3% of Si, 0.5-1%of Cr, 0.5-1% of Na, 0.1-0.3% of Mg, 0.1-0.3% of Ti, 0.05-0.1% of P, 0.05-0.1% of V, 0.05-0.1% of S, 0.05-0.1% of Gd, 0.05-0. 1% of Co, 0.05-0.1% of Ni, 0.05-0.1% Ho, 0.01-0.1% of Eu, 0.01-0.03% Cu, 0.005-0.01% of Mo, 0.001-0.005% of Ir, 0.001-0.005% of Pb, and the balance Fe.

Description

technical field [0001] The invention relates to the field of casting, in particular to a ferrosilicon or ferrochrome ingot casting machine. Background technique [0002] Ferroalloy production usually adopts the following four casting methods: 1. Pit casting: the molten iron in the ladle is cleaned of slag and then poured into the pit. After the alloy is cooled, it is scooped up with a forklift and put into storage, and then processed to a qualified particle size before being sold. ; 2. Ingot mold casting: use cast iron ingot molds with a bottom thickness of more than 150mm and no molten iron overflow outlet to place independently, and move the ingot molds one by one with the ladle hanging on the crane, and cast into product blocks with a thickness of more than 200mm. After being taken out, it is crushed by a powerful crusher to a particle size of less than 150mm and put into storage, and then processed to a qualified particle size before being sold; 3. Casting of "pit-cast i...

AI Technical Summary

Problems solved by technology

[0003] At present, the casting molds used for casting ferrosilicon ingots still adopt the traditional casting molds for casting gray cast iron billets. For casting ferrosilicon or ferrochrome ingots, the pouring temperature is as high as 1480-1530°C, which is higher than that of ordinary gray cast iron molten iron casting. The temperature (1250-1300°C) is about 230°C higher. Therefore, the traditional pouring mold for gray cast iron casting cannot meet the casting requirements for ferrosilicon ingots. Therefore, the casting mold for continuous casting of ferrosilicon ingots has become a serious constraint on production efficiency. the bottleneck

First of all, the traditional pouring mold for gray cast iron casting, after the ferrosilicon molten iron is poured, the heat transfer is slow, the air bubbles in the molten iron cannot overflow quickly and fully, and the molten iron and the mold are prone to fusion and bonding. The unloading end is specially equipped with a pick-up device to separate the billet from the mold, which is inconvenient to use. At the same time, the mechanical properties of the existing mold such as thermal conductivity, thermal fatigue, and high-temperature oxidation resistance can no longer meet the needs of continuous casting of ferrosilicon ingots. need

[0004] In addition, during continuous casting, the temperature of the molten iron just out of the ladle is the highest, which has the greatest impact on the life of the ingot mold, resulting in uneven life of the ingot mold on the cast iron machine, which in turn affects the overall service life of the cast iron machine