Metal smelting method

A metal smelting and metal technology, applied in the field of metal smelting, can solve the problems of heavy process burden, large amount of slag, lower metal grade, etc., and achieve the effects of improving work efficiency, high metal recovery rate, and promoting reduction reaction

Inactive Publication Date: 2014-03-26
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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Problems solved by technology

[0003] At present, using submerged arc furnace and adding solid reducing agent for smelting is a commonly used thermal reduction smelting method, but there are two disadvantages: (1) In the process of briquetting, coal powder needs to be added as reducing agent, and the slag produced by melting If the amount is large, the metal grade will decrease, which is not conducive to the subsequent extraction and separation; (2) Adding a solid reducing agent may bring in harmful impurities such as sulfur and phosphorus, which will increase the burden on the subsequent desulfurization and dephosphorization process, and even affect product quality and the health of production workers
[0004] Therefore, the current method of metal smelting still needs to be improved.

Method used

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  • Metal smelting method

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Embodiment 1

[0048] Crush the refractory ore raw material to 10-20mm, put it into a vertical reactor through a hopper, and reduce it at 0.15MPa and 900-950°C for 3-4 hours. The reducing gas enters from the middle of the vertical reactor, and the H in the reducing gas 2 +CO≥85%. After reduction, the product containing elemental metallic iron at ~700°C is sent to the melting furnace for melting and separation of metal and slag (melting). The fuel of the melting furnace has a calorific value higher than 750kcal / m 3 , less than 4500kcal / m 3 The mixed gas, the combustion gas is air. The dust-laden flue gas in the melting furnace passes through the high-temperature dust collector to remove large particles of dust and then enters the heat storage body for heat exchange. After heat exchange, the flue gas below 200 °C enters the bag filter for fine dust removal and is discharged from the chimney. The heat is used to preheat the mixture of gas and air. The temperature of the melting furnace is ...

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Abstract

The invention discloses a metal smelting method which comprises the following steps: introducing metallic ores containing metal oxides and reducing gas into a vertical reactor to carry out reducing treatment on the metal oxides, thereby obtaining a reduction product containing a metal substance; and introducing the reduction product into a melting furnace to carry out melting separation treatment, thereby respectively obtaining furnace slag and a liquid metal simple substance. The method can effectively smelt metallic ores to prepare the metal simple substance, and can also effectively recycle heat generated by the melting separation treatment.

Description

technical field [0001] The invention relates to the field of metallurgy. In particular, the invention relates to methods for metal smelting. Background technique [0002] Metal smelting methods are usually divided into three categories: thermal decomposition, thermal reduction and electrolysis. In general, metal elements behind hydrogen such as Hg, Ag, etc. are suitable for thermal decomposition, K, Ca, Na, Mg, Al, etc. are suitable for electrolysis, and other metals such as Fe, Zn, Cu, Sn, etc. are suitable for thermal decomposition. Reduction method, it can be seen that the thermal reduction method is applicable to a wide range of metals. [0003] At present, using submerged arc furnace and adding solid reducing agent for smelting is a commonly used thermal reduction smelting method, but there are two disadvantages: (1) In the process of briquetting, coal powder needs to be added as reducing agent, and the slag produced by melting If the amount is large, the metal grade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B5/12
Inventor 吴道洪李志远
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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