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Method for direct metal making by microwave energy

A metallic, direct technology for energy efficiency, process efficiency improvements, furnaces, etc.

Inactive Publication Date: 2006-04-12
黄小第 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But one disadvantage of induction heating is that it relies on the introduction of eddy currents in the substance being heated

Method used

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  • Method for direct metal making by microwave energy
  • Method for direct metal making by microwave energy
  • Method for direct metal making by microwave energy

Examples

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example 1

[0048] A sample was prepared containing iron ore concentrate containing 65% iron mixed with 15% carbon black as reducing agent, 1% lime as flux and 5% pulverized coal as auxiliary fuel. The mixture was filled into refractory clay crucibles and loaded into a microwave treatment unit MCR200, manufactured by Wavemat Ltd. The device includes a 2.45Ghz microwave generator with a power of 300W - 3000W. This microwave device can be used with adjustable single-mode or controllable multi-mode microwave chambers. The chamber can be evacuated or continuously flushed with inert or reducing gas. A single mode of 1 kw power was used and the sample was heated to 1200 °C within 10 minutes. Measure the temperature on the outer surface of the crucible with a pyrometer. The temperature inside the crucible was not measured, but was known to be higher than 1200°C. During the heating period, the pulverized coal burns and creates a flame. The samples were incubated at about 1200°C for about 2 m...

example 2

[0050] A Cu-containing 2 A sample of S powder mixed with a stoichiometric amount of 7.5% carbon black as reducing agent. The mixture was filled into a refractory clay crucible and loaded into a microwave processing unit MCR200. The microwave chamber is constantly filled with N 2 The discharge port of the flushing forced incision chamber is connected to a scrubber. The scrubber consisted of a glass flask with a side tube and a rubber stopper for sealing its mouth. Fill half a flask with 10% basic NaOH solution. A tube through a rubber stopper is immersed in an alkaline solution with one end of the tube. The other end of the tube is connected to the outlet of the microwave chamber with a hose. During heating, the sample emitted a lot of fumes and these fumes were passed into the NaOH solution. The sample was heated to 1100 °C within 5 minutes using a single die. The temperature of the outer surface of the crucible was measured with a pyrometer. The temperature was mainta...

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Abstract

A method for the direct preparation of metal from metal-containing material comprising providing metal-containing material and a reducing agent, mixing the metal-containing material with the reducing agent to form a mixture charging the mixure by an appropriate method except flowing a stream of smal l particles into a container, heating the mixture with minimal contamination b y applying microwave energy to the mixture until molten metal is released from the metal-containing material, accumulating the molten metal by gravity at t he bottom of the container, and discharging the metal from the container.< / SDOA B>

Description

technical field [0001] This invention relates to direct metal fabrication using microwave energy as primary or secondary energy to reduce and melt metal-containing substances and to separate molten metal from slag. Background technique [0002] Common methods of extracting metals from their respective ores are characterized by high energy losses and the release of environmentally undesirable by-products, including large quantities of particulates, SO 2 , CO 2 and NO 2 . [0003] Prior to the present invention, steelmaking was carried out using an indirect method, according to which iron was first produced from ore or scrap metal. The iron thus produced is then transformed into steel. In a typical ironmaking process, iron ore is ground to 500 mesh to liberate iron oxide from other minerals. The resulting material is then subjected to a separation operation such as magnetic separation and / or flotation to concentrate the iron oxide. The resulting fines are usually agglome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B4/00C22B7/00C22B9/22C21C5/52C22B4/04C22B5/02
CPCC21C5/56C21C5/5241C21B11/10C21C7/10C22B15/0026C22B7/001C22B15/0021C22B5/10C21C5/52C21C5/5211C21B13/008C21B15/00C22B4/00Y02P10/122Y02P10/134Y02P10/20Y02P10/25
Inventor 黄小第王建扬
Owner 黄小第
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