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Rotary kiln for reducing ferronickel ore

A rotary kiln, iron ore technology, applied in rotary drum furnaces, furnace types, furnaces, etc., can solve problems such as high energy consumption

Pending Publication Date: 2021-07-06
河南省煜晟镍业有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcoming of high energy consumption of the electric furnace smelting technology in the prior art, and use a rotary kiln to reduce nickel-iron ore. This application provides a rotary kiln for nickel-iron ore reduction

Method used

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  • Rotary kiln for reducing ferronickel ore
  • Rotary kiln for reducing ferronickel ore

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is some embodiments of the present invention, but not all of them. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0021] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of or...

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Abstract

The invention discloses a rotary kiln for reducing a ferronickel ore, comprising a barrel and a driving support device. The barrel is sequentially provided with a preheating section, a drying dehydrating section, a reducing section, a smelting section and a cooling section in the material moving direction; the reducing section is provided with an air inlet; and the drying dehydrating section and / or the preheating section are / is provided with an air outlet. An air blower is arranged at the air inlet of the reducing section of the rotary kiln for reducing the ferronickel ore, the air inlet amount can be adjusted according to needs, incomplete combustion of pulverized coal is controlled, the reducing atmosphere of the kiln tail is achieved, and the metal reduction rate is increased. When the temperature of the rotary kiln needs to be increased, air is continuously blown into the rotary kiln, so that combustible gas in flue gas is combusted. Besides, the air outlet is formed in the drying dehydration section and / or the preheating section, an exhaust fan can be arranged at the air outlet, convection is formed between the air inlet and the air outlet, high-temperature flue gas generated by reduction smelting is fully utilized for preheating and drying raw ore, and energy consumption is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of nickel-iron ore production, in particular to a rotary kiln for nickel-iron ore reduction. Background technique [0002] At present, the more advanced domestic technology of using lateritic ferronickel is the rotary kiln pre-reduction-electric furnace smelting technology. The secondary process needs to be smelted under high-temperature melting conditions. The processing capacity of a single furnace is limited, energy consumption is large, and production costs are high. In order to increase production, facilitate the expansion of production and limit costs, a technology of direct reduction of nickel-iron ore using a rotary kiln has been developed. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantage of high energy consumption in the prior art electric furnace smelting technology, and use a rotary kiln to reduce nickel-iron ore. The application provides a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/06C22B5/10C22B23/02
CPCC21B11/06C22B5/10C22B23/023
Inventor 张鹏超薛智诚郑光宇
Owner 河南省煜晟镍业有限责任公司
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