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A method of controlled reduction of laterite nickel ore to produce high-quality ferronickel

A lateritic nickel ore, high-quality technology, applied in the direction of furnace types, furnaces, shaft furnaces, etc., can solve the problems of poor continuous operation, high S and P content, and the inability to control the content of nickel-iron alloy nickel, etc., to achieve a wide range of raw materials, wide range of effects

Active Publication Date: 2017-01-18
SHENWU TECH GRP CO LTD
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Problems solved by technology

[0016] The purpose of the present invention is to provide a method of controlled reduction of laterite nickel ore to produce high-quality ferronickel to solve the problem that the existing laterite nickel ore treatment process for producing ferronickel cannot control the nickel content in the nickel-iron alloy and the carbon content in the nickel-iron alloy And problems such as high S and P content, high energy consumption in process production, poor continuous operation, and uneven quality of ferronickel

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  • A method of controlled reduction of laterite nickel ore to produce high-quality ferronickel

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Embodiment Construction

[0043] In order to better explain the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention.

[0044] As shown in the figure, a method for controlled reduction of laterite nickel ore to produce high-quality ferronickel includes the following steps:

[0045] (1) Gas drying the laterite nickel ore raw materials;

[0046] (2) The dried laterite nickel ore raw materials are crushed and screened;

[0047] (3) The sieved laterite nickel ore powder enters the fluidized bed and is pre-reduced by reducing gas;

[0048] (4) Pre-reduced laterite nickel ore powder hot briquette;

[0049] (5) The laterite nickel ore after briquetting enters the shaft furnace and is reduced by reducing gas;

[0050] (6) After the reduction treatment, the laterite nickel ore is crushed, ground, and physically separated to obtain high-quality nickel-iron alloy...

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Abstract

The invention provides a method for producing high-quality nickel-iron alloy by reducing laterite-nickel ore under control. The method comprises the following steps: (1) drying ore raw material with gas; (2) pulverizing the dried ore raw material and screening; (3) feeding the screened ore powder into a fluidized bed and pre-reducing with a reducing gas; (4) hot-pressing the pre-reduced ore powder into blocks; (5) feeding the ore blocks into a shaft furnace and reducing with a reducing gas; and (6) pulverizing the reduced ore, fine-grinding, and separating physically to obtain the high-quality nickel-iron alloy. The method provided by the invention has the advantages of low reaction temperature, low consumption of energy, production of high-quality nickel-iron alloy and flexible adjustment of content of nickel in the nickel-iron alloy.

Description

Technical field [0001] The invention relates to a method for producing ferronickel, in particular to a method for producing high-quality ferronickel by controlled reduction of laterite nickel ore. Background technique [0002] As the main alloying element, nickel is used in stainless steel, heat-resistant alloy steel and various nickel alloys, accounting for more than 70% of the total nickel consumption. With the rapid development of the stainless steel industry, the demand for nickel has also increased substantially. At present, 60% of global mine nickel production comes from nickel sulfide ore and 40% comes from laterite nickel ore. In the global nickel ore reserves of 220 million tons, laterite nickel ore accounts for about 70%. With the continuous reduction of nickel sulfide ore resources and the continuous improvement of laterite nickel smelting technology, the proportion of nickel produced from laterite nickel ore will continue to increase. [0003] For different types of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/02C22B1/00
CPCY02P10/143
Inventor 吴道洪张奔李志远
Owner SHENWU TECH GRP CO LTD
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