Device for pyrolysis iron removal process of iron-bearing mineral nitric acid leaching liquor
A technology of leaching liquid and nitric acid, which is applied in the field of leaching liquid application equipment of nitric acid system in wet smelting, to achieve the effect of increasing the processing capacity and heating surface area
Active Publication Date: 2019-08-27
JINCHUAN GROUP LIMITED
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Problems solved by technology
[0004] The purpose of the present invention is to solve the equipment problems of iron removal and acid-water separation in the existing nitric acid system metallurgical process, through research and development and application of new equipment, to increase the iron removal treatment capacity of a single device, and further supporting acid-water separation equipment, Realize the separation of acid water containing acid steam, so that the content of iron can be reduced to the range required by production
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[0015] as attached figure 1 As shown, a device for the pyrolysis iron process of ferrous mineral nitric acid leaching liquid, the device includes a spray reaction iron removal device and an acid water separation device. Spray reaction iron removal device: blow hot air from hot air blower 9 to spray reaction tower 1, heat spray reaction tower 1, the temperature of spray reaction tower 1 is controllable, and its internal temperature is within the range of 130-180°C. The top of the spray reaction tower 1 is a steam outlet, and the steam outlet is connected to the fan 2 through a pipeline. The upper part of the spray reaction tower 1 is provided with a gas-liquid separation layer 1-2 to prevent the mist solution from flowing away with the steam. The nozzle 1-1 is set under the gas-liquid separation layer 1-2, and the nozzle 1-1 is connected to the liquid inlet pipe. It is the droplet heated reaction zone, and the hot air blower 9 is connected to the tower wall of this zone. The...
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The invention relates to a device for a pyrolysis iron removal process of an iron-bearing mineral nitric acid leaching liquor. The device for the pyrolysis iron removal process of the iron-bearing mineral nitric acid leaching liquor comprises a spraying reaction tower, a draught fan, a heating kettle, a hot air fan, a jet nozzle, a gas-liquid separation layer and an acid-water separation device. The device for the pyrolysis iron removal process of the iron-bearing mineral nitric acid leaching liquor sprays and disperses a nickel nitrate copper and iron solution, and then evaporates most waterof the nickel nitrate copper and iron solution under certain temperature to convert iron to iron oxide through reaction so as to achieve the separation and iron removal purpose, and simultaneously nitric acid-containing steam generated in iron removal enters the acid-water separation device, and then is mixed with slag washing water so as to achieve acid-water separation. The device for the pyrolysis iron removal process of the iron-bearing mineral nitric acid leaching liquor has the advantages that high temperature gas is used for heating the spraying leaching liquor, and treating capacity ofthe single device is increased. The acid-water separation is achieved by using a rectification principle, and generated acid water and condensate water can be recycled, and furthermore no wastewateror waste slag is generated, and therefore the device for the pyrolysis iron removal process of the iron-bearing mineral nitric acid leaching liquor is clean and free of pollution.
Description
technical field [0001] The invention belongs to the field of application equipment for nitric acid system leaching liquid in hydrometallurgy, and relates to a device used in the pyrolytic iron removal process of nitric acid leaching liquid of iron-containing nonferrous metal minerals. Background technique [0002] With the development of equipment technology in recent years, nitric acid has been widely used in the field of nickel, copper, cobalt and other non-ferrous metal wet smelting, and due to the unique properties of the nitric acid system, the nitric acid leaching solution can use pyrolysis to remove iron, that is, iron-containing nitric acid The nickel-copper solution is heated, evaporated and concentrated to decompose the ferric nitrate in the solution to form iron oxide slag and nitric acid. The nitric acid volatilizes with water vapor and enters the steam. Therefore, there is no alkali consumption in the iron removal process, and the nitric acid process can be appli...
Claims
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Login to View More IPC IPC(8): C22B3/02C22B3/44
CPCC22B3/02C22B3/44Y02P10/20
Inventor 张晗刘玉强李娟李维舟王书友马永虎高晓婷郁洪波陈彩霞李全席海龙王钦路思阳郭金权张建玲马天飞
Owner JINCHUAN GROUP LIMITED