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A process for smelting manganese-rich slag from high-aluminum manganese-poor iron ore and high-sulfur coke

A high-aluminum manganese-poor iron ore and high-aluminum manganese ore technology, which is applied in the field of high-aluminum manganese-poor manganese ore and high-sulfur coke smelting manganese-rich slag technology, can solve the problems that cannot meet the requirements of smelting

Active Publication Date: 2021-09-10
宁夏晟晏实业集团能源循环经济有限公司
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AI Technical Summary

Problems solved by technology

However, due to raw material conditions such as high iron, high aluminum, high sulfur, and low manganese, the traditional manganese-rich slag smelting process cannot meet the smelting requirements. The heat system and slagging system are completely different from the phase separation theory of manganese-rich slag smelting slag.

Method used

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  • A process for smelting manganese-rich slag from high-aluminum manganese-poor iron ore and high-sulfur coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, a process for smelting manganese-rich slag from high-aluminum manganese-poor iron ore and high-sulfur coke, the process of smelting manganese-rich slag is: manganese sintering process ingredients: use low manganese, high iron and high sulfur powder (Fe35-38%, Mn5- 10%, S≥0.4%, SiO2≥19-27%), South African high iron powder (Fe24-27%, Mn26-27.5%, AL2O3≥3-7%) and domestic high sulfur iron powder (Fe64-65%, S≥2.6-3.0%) are used as raw materials for sintering production; manganese-rich slag process ingredients: use manganese sintering process to produce manganese sinter (Mn13-15%, Fe39-45%) with 60%, high aluminum manganese ore (Fe20 -23%, Mn29-33%, AL2O3≥9-12%) add 30%, low manganese high iron ore (Mn5-10%, Fe35-38%, S≥0.5%, P≥0.3%) add 10% %; Manganese-rich slag sintering fuel ingredients: use fuel ratio 85 high-sulfur coke (C85%, S≥1.5-2.0, A≤13.5%, CSR≥55%, CRI≤25-28%) with 60%, 80% Coke (C80%, S≥1.0-1.2, A≤16-18%, CSR≥60%, CRI≤26%) is mixed w...

Embodiment 2

[0041] Such as figure 1 As shown, a process for smelting manganese-rich slag with high-aluminum manganese-poor iron ore and high-sulfur coke, the process for smelting manganese-rich slag is: manganese-rich slag process ingredients: manganese sintered ore (Mn13-15% , Fe39-45%) with 60%, high aluminum manganese ore (Fe20-23%, Mn29-33%, AL2O3≥9-12%) with 30%, low manganese high iron ore (Mn5-10%, Fe35- 38%, S≥0.5%, P≥0.3%) with 10%; manganese-rich slag sintered fuel ingredients: use fuel ratio 85 high-sulfur coke (C85%, S≥1.5-2.0, A≤13.5%, CSR≥ 55%, CRI≤25-28%) add 60%, 80 coke (C80%, S≥1.0-1.2, A≤16-18%, CSR≥60%, CRI≤26%) add 40%, tons The slag-coal ratio is 70kg, the oxygen enrichment rate is 5.5%, and it is put into the submerged arc furnace for high-temperature smelting: put the prepared manganese-rich slag raw material and manganese-rich slag sintering fuel into the submerged arc furnace and use the pyroenrichment technology for smelting. The process of smelting Medium tem...

Embodiment 3

[0043] Such as figure 1 As shown, a process for smelting manganese-rich slag with high-aluminum manganese-poor iron ore and high-sulfur coke, the process for smelting manganese-rich slag is: manganese-rich slag process ingredients: manganese sintered ore (Mn13-15% , Fe39-45%) with 60%, high aluminum manganese ore (Fe20-23%, Mn29-33%, AL2O3≥9-12%) with 30%, low manganese high iron ore (Mn5-10%, Fe35- 38%, S≥0.5%, P≥0.3%) with 10%; manganese-rich slag sintered fuel ingredients: use fuel ratio 85 high-sulfur coke (C85%, S≥1.5-2.0, A≤13.5%, CSR≥ 55%, CRI≤25-28%) add 60%, 80 coke (C80%, S≥1.0-1.2, A≤16-18%, CSR≥60%, CRI≤26%) add 40%, tons The slag-coal ratio is 70kg, the oxygen enrichment rate is 5.5%, and it is put into the submerged arc furnace for high-temperature smelting: put the prepared manganese-rich slag raw material and manganese-rich slag sintering fuel into the submerged arc furnace and use the pyroenrichment technology for smelting. The process of smelting Medium tem...

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Abstract

The invention discloses a process for smelting manganese-rich slag from high-aluminum manganese-poor iron ore and high-sulfur coke. The purpose is to rationally use the proportion of domestic low-manganese high-iron manganese ore and foreign high-iron high-aluminum manganese ore on the basis of the existing technology. Through the practical research of different load softening temperature and reflow temperature range of ore types, the reasonable range of slag-iron ratio, the amount of ferromanganese into the furnace and the ratio of ferromanganese, sulfur load into the furnace and desulfurization distribution rate are controlled, and at the same time, through reasonable slag phase control Quaternary basicity, slag phase liquidus line, SiO2 / AL2O3, MnO / AL2O3 and MnO / SiO2 multiple ranges. In terms of operation, the ore coke difference (0°-minus 2.5°) and the amount of oxygen enrichment and coal injection should be adjusted reasonably. In order to achieve the successful application of advanced environmental protection equipment such as no material bell, oxygen-enriched coal injection and other energy-saving technical measures, high-alumina, high-iron and lean manganese ore, and finally achieve the purpose of stable and smooth operation of the manganese-rich slag furnace and reduce the cost of manganese-rich slag extraction.

Description

technical field [0001] The invention relates to the high-efficiency metallurgical technology field of high-aluminum, high-sulfur and low-grade ore complex and refractory ferromanganese ore in the pyro-enrichment technology of a manganese-rich slag furnace, in particular to a high-aluminum manganese-poor ferromanganese ore and high-sulfur coke for smelting rich manganese Slag craft. Background technique [0002] With the continuous expansion of domestic silicon-manganese alloy production scale, the demand for manganese-rich ore for smelting high-quality silicon-manganese alloys in submerged arc furnaces is increasing. In my country's manganese ore resource reserves, rich ore only accounts for about 5%, most of which are poor manganese ore or iron-manganese ore, and complex refractory ores containing phosphorus and iron occupy a large proportion. It can only be treated by manganese-rich slag smelting, that is, pyro-enrichment technology. The enrichment principle of manganese-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16C22B47/00C21B11/10
CPCC21B11/10C22B1/16C22B47/00
Inventor 梁宇蕾雷金碧杨斌秦威王东杜海龙杨文朝卜自强杨晓龙韩二小梁帆龚伏波杨志国
Owner 宁夏晟晏实业集团能源循环经济有限公司
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