Method for producing high-quality nickel-iron alloy by reducing laterite-nickel ore under control

A lateritic nickel ore, high-quality technology, applied in furnace types, furnaces, shaft furnaces, etc., can solve problems such as poor operation continuity, high S and P content, high energy consumption in process production, and a wide range of raw materials. Effect

Active Publication Date: 2015-04-22
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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  • Method for producing high-quality nickel-iron alloy by reducing laterite-nickel ore under control

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Embodiment Construction

[0043] In order to better illustrate the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the 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 comprises the following steps:

[0045] (1) carry out gas drying to laterite nickel ore raw material;

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

[0047] (3) The screened laterite nickel ore powder enters the fluidized bed for pre-reduction by reducing gas;

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

[0049] (5) The laterite nickel ore after briquetting enters the shaft furnace for reduction through reducing gas;

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

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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 production method of 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 significantly. At present, 60% of global mine nickel production comes from nickel sulfide ore, and 40% comes from laterite nickel ore. Among the 220 million tons of global nickel ore reserves, laterite nickel ore accounts for about 70%. With the continuous reduction of nickel sulfide ore resources and the continuous improvement of laterite nickel ore smelting technology, the proportion of nickel produced from laterite nickel ore will continue to increase. [0003] For diff...

Claims

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Application Information

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Patent Type & Authority Applications(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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