Self-reduction of manganese-rich slag briquette containing carbon

Zhang, Bo; Xue, Zhengliang; Zhu, Tingting; Dong, Jiang

doi:10.1016/s1006-706x(15)30019-4

Cited by 4 publications

(3 citation statements)

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“…The experiment was carried out in a 500 kg induction furnace with top blowing oxygen and bottom blowing nitrogen. The expected target compositions of high-manganese slag and molten steel [1,20] are listed in Table 2.…”

Section: Test Equipment and Schemementioning

confidence: 99%

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Manganese-rich slag is an important raw material for smelting ferromanganese and ferrosilicon. [1,2] During the production of manganese-rich slag, high-manganese pig iron with high-manganese content forms as a by-product. Its chemical composition is presented in Table 1.Once the blast furnace is tapped, the iron concentrate powder is poured into the high-manganese molten iron, and the slag containing 50% manganese oxide is then removed.The manganese and phosphorus content of high-manganese pig iron is relatively high (Table 1), making its use in a smelting process difficult.Based on previous studies, [3][4][5][6][7][8][9][10][11][12][13][14][15] highmanganese pig iron can be transformed in two ways: 1) The iron concentrate is poured into high-manganese molten iron, and the slag containing 50% manganese oxide is removed.

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mentioning

confidence: 99%

“…Manganese-rich slag is an important raw material for smelting ferromanganese and ferrosilicon. [1,2] During the production of manganese-rich slag, high-manganese pig iron with high-manganese content forms as a by-product. Its chemical composition is presented in Table 1.…”

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confidence: 99%

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Study on Efficient Use of High‐Manganese Pig Iron

Zhao

Yang

et al. 2023

steel research int.

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The smelting process of high‐manganese pig iron is studied to determine ways to efficiently utilize the by‐product of manganese‐rich slag. This process consists of two stages: 1) demanganese and carbon retention and 2) decarbonization and dephosphorization. In the first stage, oxygen is supplied at 0.5–2.0 Nm3 t−1 min−1. The temperature is controlled between 1300 and 1400 °C by adding iron ore to the molten bath. Ultimately, high‐manganese slag, which contains more than 50% manganese oxide and semisteel with 3.2% carbon, is produced. In the second stage, oxygen is supplied at 2.0−5.0 Nm3 t−1 min−1 and slag‐forming materials are added to the molten bath for the dephosphorization and desulfurization of the hot metal. Consequently, the iron oxide, manganese oxide, and silicon oxide contents of the high‐manganese slag and the carbon, manganese, phosphorus, and sulfur contents of the semisteel are 10.8–15.3%, 70–77%, and 3–7%, and 3.2–4.2%, 0.3–1.0%, 0.12–0.22%, and 0.01–0.024%, respectively. The main mineral phases of high‐manganese slag, 2MnO·SiO2 and FeO·MnO·SiO2, are suitable for the preparation of high‐carbon ferromanganese raw materials. After further smelting, clean molten steel containing 0.03−0.08%, 0.08−0.20%, 0.005−0.02%, and 0.01−0.024% carbon, manganese, phosphorus, and sulfur, respectively, is obtained.

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Section: Test Equipment and Schemementioning

confidence: 99%

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mentioning

confidence: 99%