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Process for smelting ferro-nickel by using nickel oxide minerals and smelting device

A technology of nickel oxide ore and ferronickel, which is applied in the field of technology and smelting equipment, can solve the problems of complex processing technology and high production cost, and achieve the effect of improving thermal efficiency

Inactive Publication Date: 2010-05-12
曾祥武
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  • Application Information

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Problems solved by technology

Therefore, the processing technology is complicated and the production cost is high.

Method used

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  • Process for smelting ferro-nickel by using nickel oxide minerals and smelting device
  • Process for smelting ferro-nickel by using nickel oxide minerals and smelting device
  • Process for smelting ferro-nickel by using nickel oxide minerals and smelting device

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Embodiment Construction

[0030] In order to illustrate the present invention in detail, the present invention will be further described below with specific implementations in conjunction with the accompanying drawings.

[0031] attached figure 1 Represent a kind of technological process of smelting ferronickel with nickel oxide ore, complete according to the following steps:

[0032] ① Nickel oxide ore batching processing

[0033] First, limestone is added to the nickel oxide ore, and the amount of limestone is 2-5% of the weight of the nickel oxide ore; it is pulverized into a powder with a particle size below 10mm by the pulverizer 22; it is fully stirred and mixed by the mixer 23 and then sent to the roller press Machine 24 presses pellets into 30*40mm elliptical pellets;

[0034] ②Heat drying

[0035] The obtained ellipsoidal pellets are lifted to the preheating furnace 1, preheated in the high-temperature waste heat of the preheating furnace 900-1100°C, and dried, and there is an exhaust pipe ...

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Abstract

The invention relates to a process for smelting ferro-nickel by using nickel oxide minerals and a smelting device, which belong to the field of the metallurgy of non-ferrous metals. The process comprises the following steps: (1) mixing and processing the nickel oxide minerals; (2) hot-roasting and drying the nickel oxide minerals; (3) performing reduction roasting in a rotary kiln; and (4) performing recovery processing. The smelting device for implementing the method mainly comprises equipment for mixing and processing the nickel oxide minerals, a preheating furnace, the rotary kiln and a foundry ladle, wherein the preheating furnace is a vertical tube structure connected above an exhaust port on a kiln tail end plate of the rotary kiln; the rotary kiln is a sealed simple body of which the inner side is provided with a refractory lining; and the diameter of one section of the simple body on the kiln head is larger than that of the middle part of the simple body, and one side of the section of the simple body is provided with a tapping hole leading to the foundry ladle. Compared with the prior art, the process and the device have the advantages of investment reduction, low consumption and high recovery rate; and the recovery rate of nickel is over 95 percent.

Description

technical field [0001] The invention belongs to the field of nonferrous metal metallurgy, in particular to a process and a smelting device for smelting ferronickel with nickel oxide ore. Background technique [0002] At present, the main source of my country's demand for metallic nickel is nickel sulfide ore. The nickel sulfide ore with a nickel content of 0.8-1.7% is crushed, ball milled, and floated to become a concentrate with a nickel content of 5-7% for electric furnace smelting, flash furnace smelting and blast furnace smelting. This is a very mature technology. With the development of society and the advancement of science and technology, stainless steel has been widely used in the world. Traditional nickel sulfide ore resources can no longer meet the needs of society, forcing people to extract metallic nickel from laterite nickel ore, which accounts for about 80% of the earth's nickel resources. . The lateritic nickel ore is called nickel oxide ore in the present ...

Claims

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Application Information

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IPC IPC(8): C21B11/06
CPCY02P10/20
Inventor 曾祥武
Owner 曾祥武
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