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A process for upgrading the product structure of manganese-rich slag smelting

A technology of process method and product structure, applied in the direction of improving process efficiency and manufacturing converters, etc., can solve the problems of high smelting cost of manganese-rich slag and inefficient recycling of manganese resources, and achieve high economic benefits

Active Publication Date: 2021-11-02
宁夏晟晏实业集团能源循环经济有限公司
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  • Description
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  • Application Information

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Problems solved by technology

The by-product high manganese molten iron is all poured into bread iron blocks by cast iron machine technology and sold to various steel mills as a cold material for converter smelting. Almost all manganese (5-6%) in high manganese molten iron is oxidized and blown away, not only manganese-rich The cost of slag smelting is high, and manganese resources cannot be recycled efficiently

Method used

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  • A process for upgrading the product structure of manganese-rich slag smelting

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Embodiment

[0027] Such as figure 1 As shown, a process method for upgrading the structure of manganese-rich slag smelting products, the production method includes: using domestic low-manganese high-iron 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 fine powder (Fe64-65%, S≥2.6-3.0%) are sintered according to the sintering Mine index Mn+Fe≥55, Mn≥13%, SiO2≥12-15%, AL2O3≤5.5%, S≤0.3%, FeO≥15-18%, R3≤0.35-0.45 process requirements for sintering ingredients, manganese-rich Slag Furnace Batching Structure Manganese sinter (Mn13-15%, Fe39-45%) add 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%) or high phosphorus iron ore (Fe58-63%, S≥0.2%, P≥0.7%) is added 10%, the ton slag coal ratio is 70kg, and the oxygen enrichment rate is 5.5%. According to the process requirements of manganese-rich ...

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Abstract

The invention discloses a process method for upgrading the structure of manganese-rich slag smelting products. Using low-manganese, high-iron, and poor manganese ore at home and abroad as raw materials, the manganese-rich slag furnace is used to smelt manganese-rich slag and high-manganese pig iron, and high-manganese Pig iron contains 5‑6% manganese. The high-manganese iron water is hot-charged into the converter for further smelting through the top-bottom combined blowing steelmaking process of the converter, and the high-scrap ratio and double-slag operation process are used to blow the high-manganese iron water into high-quality manganese-rich slag and semi-steel, semi-steel Further deoxidation, decarburization, dephosphorization, alloying and refining into 20MnSi equivalent series of molten steel. The production method can save more than 12kg / t of the silicon-manganese alloy during use, and at the same time produce high-quality manganese-rich slag products. The process of the invention has high economic benefits.

Description

technical field [0001] The invention relates to the field of manganese-rich slag pyro-enrichment and iron and steel metallurgy technology to improve manganese-rich slag manganese recovery rate and deep processing of high-manganese molten iron, in particular to a process method for upgrading the structure of manganese-rich slag smelting products. Background technique [0002] Manganese-rich slag furnace smelting manganese-rich slag is a key technology for the comprehensive utilization of resources encouraged by the state, including high-efficiency separation technology for complex and refractory metal ores, high-efficiency metallurgical technology for low-grade complex and refractory ores, and comprehensive utilization technology for co-associated resources and low-grade ores. At present, the domestic low-manganese high-iron grade is manganese 8-12%, iron 30-38%, and foreign low-manganese high-iron ore (manganese 20-32%, iron 18-22%) is based on South African high-speed rail, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/35C21C5/36C22B1/16C22B7/04C22B47/00
CPCC21C5/35C21C5/36C22B1/16C22B7/001C22B7/04C22B47/00Y02P10/20
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