Method for producing nickel/ferrum from nickel laterite ores

A technology of laterite nickel ore and roasting products, which is applied in the field of metallization reduction roasting-combined fire-wet smelting to separate valuable metals, and the production of nickel/iron from laterite nickel ore, which can solve the problems of high production temperature, high smelting energy consumption, and difficult production Control and other issues, to achieve the effect of low reduction temperature, low comprehensive income, and high-efficiency separation

Inactive Publication Date: 2013-08-07
江苏曦元金属材料有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The RKEF method consumes a large amount of secondary energy—electric energy for the treatment of laterite nickel ore. It is suitable for places with abundant power resources. Generally, only nickel-iron alloy can be obtained as a product, which is relatively simple.
In addition to the RKEF method, Japan’s Oeyama method is a model of non-electric furnace production of ferronickel from laterite nickel ore. This method uses rotary kiln high-temperature reduction roasting to produce granular iron, but the production temperature is high (1350 ° C), and the roasting process is easy to sinter. Production It is not easy to control, and the energy consumption is relatively high. At present, this method has not been widely promoted and applied.
[0005] In short, the current processing technology of laterite nickel ore is relatively independent and single, and there are problems such as high energy consumption for smelting, low recovery rate of valuable metals, and low added value of products.

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  • Method for producing nickel/ferrum from nickel laterite ores

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Embodiment approach 1

[0027] Embodiment one: the steps of the method for producing nickel / iron from laterite nickel ore in this embodiment are:

[0028] (1) Firstly, the laterite nickel ore (the composition is iron 11wt%, nickel 2wt%, magnesium oxide 22.7wt%, cobalt 0.02wt%) is sequentially crushed, first dried and finely ground (to a particle size of 110-130μm), and then Blend with carbonaceous reducing agent and additives and mix evenly (first, mix carbonaceous reducing agent and laterite nickel ore evenly, the amount of carbonaceous reducing agent added is 8% of the mass of laterite nickel ore, then add additives and mix evenly, additive The addition amount is 5% of the mass of laterite nickel ore; the carbonaceous reducing agent refers to the mixture of bituminous coal, anthracite and coke with a carbon content of more than 70wt%; the additive is silicon dioxide), pressed, and Drying again at ℃ for 1 hour, preheating the material at 350℃ for 1.5 hours after drying again, and finally reducing an...

Embodiment approach 2

[0030] Embodiment two: the steps of the method for producing nickel / iron from laterite nickel ore in this embodiment are:

[0031] (1) Firstly, the lateritic nickel ore (the composition is iron 10wt%, nickel 1.5wt%, magnesium oxide 25.6wt%, cobalt 0.2wt%) is sequentially crushed, first dried and finely ground (to a particle size of 75-100 μm), Then mix with carbonaceous reducing agent and additives and mix evenly (firstly, carbonaceous reducing agent and laterite nickel ore are evenly mixed, the amount of carbonaceous reducing agent added is 10% of the quality of laterite nickel ore, then add additives and mix uniformly, The amount of additive added is 11% of the mass of laterite nickel ore; the carbonaceous reducing agent refers to a mixture of bituminous coal and anthracite with a carbon content above 70wt%; the additive is any proportion of silicon dioxide, calcium oxide and calcium fluoride Mixture), pressed, and dried again in the drying kiln at 150-200°C for 0.5h, the ma...

Embodiment approach 4

[0036] Embodiment four: the steps of the method for producing nickel / iron from laterite nickel ore in this embodiment are:

[0037] (1) Firstly, the laterite nickel ore (the composition is iron 50wt%, nickel 0.8wt%, magnesium oxide 3wt%, cobalt 0.02wt%) is sequentially crushed, first dried and finely ground (to a particle size of 100-150 μm), and then Mix with carbonaceous reducing agent and additives (first, mix carbonaceous reducing agent and laterite nickel ore evenly, the amount of carbonaceous reducing agent added is 10% of the mass of laterite nickel ore, then add additives and mix evenly, additive The amount added is 25% of the mass of lateritic nickel ore; the carbonaceous reducing agent refers to a mixture of bituminous coal and anthracite with a carbon content above 70wt% in any proportion; the additive is a mixture of silicon dioxide, calcium oxide and calcium fluoride in any proportion) , pressed, and dried again in the drying kiln at 220°C for 2 hours, the materia...

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Abstract

The invention relates to a method for producing nickel/ferrum from nickel laterite ores, in particular relates to a fire-wet combined smelting method for metallization reducing roasting-separating of valuable metals, and belongs to the technical field of nickel laterite ore comprehensive utilization. The method comprises steps of: completing the metallization reducing roasting of the nickel laterite ores in a rotary kiln, and carrying out floatation, magnetic separation and reselection on roasted products so as to effectively separate the valuable metals. A fire method effectively combined with a wet method, and the method is a brand-new exploration and development of a nickel laterite ore resource comprehensive utilization technology. By implementing the technology, the energy consumption in a smelting process can be effectively reduced, the smelting production efficiency is increased, and the nickel laterite ore resource comprehensive utilization is realized.

Description

technical field [0001] The invention relates to a method for producing nickel / iron from laterite nickel ore, specifically a metallization reduction roasting-fire-wet combined smelting method for separating valuable metals, and belongs to the technical field of comprehensive utilization of laterite nickel ore. Background technique [0002] Nickel is an important strategic resource, widely used in special steel, electroplating, petrochemical catalysts, battery materials and other fields. Nickel is mainly consumed in the production of stainless steel, which accounts for about 66% of the total global nickel consumption. In 2012, the global stainless steel production reached 34.6 million tons, a year-on-year increase of 2.6%, of which my country's stainless steel production reached 15.3 million tons, a year-on-year increase of 7.6%, accounting for about 45% of the world's total. my country has become a major stainless steel production and consumption country. With the rapid deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C21B13/00C22B5/10C22B23/02B03B7/00
Inventor 章钦成王华张兴泽魏永刚李博宣汤校
Owner 江苏曦元金属材料有限公司
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