Copper-nickel high-sulfonium fluidization roasting furnace

Abstract

The invention discloses a copper-nickel high-sulfonium fluidization roasting furnace, which comprises a furnace body, a furnace lid and an air box. A furnace cavity is reserved in the furnace body, a front chamber portion which is arranged on one side of the furnace body protrudes outwards radially along the furnace body and extends up by a preset height from the bottom end face of the furnace body, a front chamber communicated with the furnace cavity is limited in the front chamber portion, a feeding port is arranged on the top wall of the front chamber portion, a fume outlet is arranged on the upper portion of the furnace body, and a discharging port is arranged on the lower portion of the furnace body. The furnace lid is arranged at the top of the furnace body and used for closing the top end of the furnace body, and the air box is provided with an air inlet and an air outlet, connected with the bottom end of the furnace body and communicated with the furnace cavity and the front chamber through the air outlet. A space for fluidization of materials in the roasting furnace is enlarged, and the copper-nickel high-sulfonium fluidization roasting furnace has the advantages of effectiveness in fluidization. Nodulation of materials in the roasting furnace can be effectively avoided, reliability of producing hydroxyl nickel during roasting of copper-nickel in the fluidization roasting furnace is improved, production efficiency of the fluidization roasting furnace is improved, and production cost is reduced.

Description

technical field [0001] The invention relates to a fluidized roasting furnace, in particular to a copper-nickel high matte fluidized roasting furnace. Background technique [0002] Copper-nickel high matte is an intermediate product in the process of copper-nickel sulfide ore smelting and recycling nickel and copper. It is further refined to produce metallic nickel and copper. There are many refining methods. For example, nickel carbonyl is produced by oxo synthesis of carbon monoxide and nickel with copper-nickel high matte as raw material, and high-purity nickel powder is produced as raw material. In order to produce nickel carbonyl, the copper-nickel high matte must first be oxidized and roasted to remove sulfur to become nickel oxide, and then the nickel oxide is hydrogenated and reduced to metal nickel to react with carbon monoxide to form nickel carbonyl. [0003] When the copper-nickel high matte is oxidized and roasted in the existing roasting furnace, the Ni in the ...

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Problems solved by technology

In order to overcome the above shortcomings, some manufacturers use multi-hearth furnaces to roast high-nickel matte, so that the high-grade matte can be desulfurized slowly and gradually in the multi-hearth furnace to achieve full desulfurization of the calcine, and at the same time prevent the sintering of the material, but the roasting in the multi-hearth furnace It also brings many disadvantages such as low production efficiency, roasting flue gas SO 2 Low (1.5-2%) cannot be recycled, and it needs to burn diesel or natural gas to supplement heat, and the production cost is relatively high

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