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Method for producing ferro-nickel alloy from nickel oxide material

A nickel-iron alloy and nickel oxide technology, applied in the field of iron and steel metallurgy, can solve the problems of reducing the reduction baking temperature of laterite nickel ore, low nickel grade of the nickel-iron alloy, unfavorable environmental protection and the like, and achieves the protection of the ecological environment and the low production cost. , good effect of nickel-iron recovery

Inactive Publication Date: 2014-04-23
温德昌 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent of "method for recovering nickel and cobalt from nickel oxide ore nickel silicate ore" introduces the "chlorination process" of "chlorination segregation process" that has problems of polluting the environment and equipment corrosion, which is not conducive to environmental protection
"Rotary hearth furnace-electric furnace combined process" has problems such as high energy consumption and high production cost.
The patent of "a process for directly producing nickel-iron alloy powder from laterite nickel ore" reduces the reduction roasting temperature of laterite nickel ore by adding a combination of additives, strengthens the reduction and separation reaction of laterite nickel ore, and obtains nickel with less impurity content Iron alloy; the disadvantage is that when the new process is used to treat nickel-deficient (Ni 0.87%) nickel oxide ore, the obtained nickel-iron alloy has a low grade of nickel (Ni 1.85-1.94%)

Method used

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  • Method for producing ferro-nickel alloy from nickel oxide material
  • Method for producing ferro-nickel alloy from nickel oxide material
  • Method for producing ferro-nickel alloy from nickel oxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Ni content 1.88%, TFe content 16.2%, SiO 2 Content 40%, MgO content 18%, AI 2 o 3 The lateritic nickel ore (iron-silicon-magnesium) with a content of 1.6% is pre-dried and dehydrated to a moisture content of 10%, crushed and finely ground to 0.1mm accounts for 85%, according to 10%, 6%, 6%, and 1% of the mass percentage of laterite nickel ore, add coke powder, anthracite coal powder, limestone, fluorite ore, mix and briquette; use bituminous coal as fuel to heat up to Dry and dehydrate at 600°C for 70 minutes, heat up to 1000°C for pre-reduction for 60 minutes, and then heat up to 1300°C for reduction for 90 minutes; the reduction product is water-quenched and cooled to 1-3mm, and the coarse-grained ferronickel is separated by 1200GS magnetic field strength; primary selection Tailings are ground to 0.1mm accounts for more than 85%, and three-stage magnetic separation is performed with 1200GS, 1600GS, and 2400GS magnetic field strengths to obtain finis...

Embodiment 2

[0020] Embodiment 2: Ni content 2.46%, TFe content 16.04%, SiO 2 Content 19.06%, MgO content 9.60%, AI 2 o 3 The main raw material of nickel oxide with a content of 12.77% (composed of 30% magnesia laterite nickel ore, 40% iron laterite nickel ore, and 30% nickel-rich slag), pre-dried and dehydrated to a moisture content of 10%, crushed and finely ground to 0.1mm accounts for 85%, according to 9%, 5.5%, 5% and 0.8% of the mass percentage of nickel oxide main raw material, respectively add coke powder, anthracite powder, limestone, fluorite ore, mix and briquette; use bituminous coal as fuel to heat up Dry and dehydrate at 600°C for 70 minutes, heat up to 1000°C for pre-reduction for 60 minutes, and then heat up to 1300°C for 90 minutes; the reduction product is water-quenched and cooled to 1-3 mm, and the coarse-grained ferronickel is separated at a magnetic field strength of 1200GS; The tailings are ground to 0.1mm accounts for more than 85%, and three-stage magnetic sep...

Embodiment 3

[0021] Embodiment 3: Ni content 2.54%, TFe content 14.27%, SiO 2 Content 19.43%, MgO content 11.73%, AI 2 o 3 The main raw material of nickel oxide with a content of 12.39% (composed of 40% magnesia laterite nickel ore, 30% iron laterite nickel ore, and 30% nickel-rich slag), pre-dried and dehydrated to a moisture content of 10%, crushed and finely ground to 0.1mm accounts for 85%, according to 9%, 5.5%, 5% and 0.8% of the mass percentage of nickel oxide main raw material, respectively add coke powder, anthracite powder, limestone, fluorite ore, mix and briquette; use bituminous coal as fuel to heat up Dry and dehydrate at 600°C for 70 minutes, heat up to 1000°C for pre-reduction for 60 minutes, and then heat up to 1300°C for 90 minutes; the reduction product is water-quenched and cooled to 1-3 mm, and the coarse-grained ferronickel is separated at a magnetic field strength of 1200GS; The tailings are ground to 0.1mm accounts for more than 85%, and three-stage magnetic se...

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Abstract

The invention discloses a method for producing a ferro-nickel alloy from a nickel oxide material, and belongs to the field of ferrous metallurgy. The ferro-nickel alloy prepared from the nickel oxide material consists of irony laterite-nickel ore, magnesian laterite-nickel ore, iron simatic laterite-nickel ore and nickel-rich slag obtained after aluminum oxide, molybdenum oxide and vanadium oxide are separated by using a waste nickel-base catalyst, wherein the nickel accounts for 0.6-2.0% of the laterite-nickel ore, the nickel accounts for 4-10% of the nickel-rich slag, the mass ratio of the laterite-nickel ore to the nickel-rich slag is (98-60):(2-40). Additives are added into tthe nickel oxide of the ratio according to the method for producing the ferro-nickel alloy from the nickel oxide material, and are uniformly mixed and pressed into blocks so as to prepare a ferro-nickel alloy product which meets the requirements on ferronickel raw materials in stainless steel production, the energy is saved, the consumption is reduced, environment pollution is reduced, the novel process is reasonable in structure, preconcentration treatment on the laterite-nickel ore is not needed, high energy consumption equipment such as a blasting furnace and an electric furnace is not needed, the raw materials are high in adaptability, and great significance in improving the comprehensive utilization rate of nickel-poor oxidized ore and secondary nickel resource is achieved.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and relates to a method for producing nickel-iron alloy from nickel oxide materials. Background technique [0002] Nickel-containing lateritic nickel ore has low grade and complex composition. Due to the lack of sulfur element needed to form nickel matte, it is not suitable to be directly treated by pyrometallurgical process of matte smelting. [0003] The lateritic nickel ore with high nickel content and low copper and cobalt content can be used to produce ferronickel by ironmaking blast furnace or submerged thermal electric furnace reduction smelting after drying, dehydration and reduction roasting, but it needs to consume a large amount of expensive metallurgical coke or Electric energy, high production cost. The cost of energy consumption accounts for more than 50% of the total cost of ferronickel manufacturing; and the resources of high-grade laterite nickel ore in the world are l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B5/10C22B5/18B03C1/02
Inventor 杨茂才温德昌杨洪飚
Owner 温德昌
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