Nickel and cobalt production enterprise raffinate waste water deep processing recovery device

Abstract

The invention relates to a nickel and cobalt production enterprise raffinate waste water deep processing recovery device. The recovery device comprises a first adsorption stirring tank, a second adsorption stirring tank, an ammonia solution dosage tank, a washing water tank, a filtering pump and a filtering device. Stirrers are arranged in the first adsorption stirring tank and the second adsorption stirring tank. The first adsorption stirring tank and the second adsorption stirring tank are communicated through a liquid guide pipe equipped with a liquid guide control valve. A sewage liquid inlet and a solid material adding opening are arranged in the first adsorption stirring tank. The first adsorption stirring tank is communicated with a steam heating pipe. The second adsorption stirring tank is communicated with the filtering device through a filtering pump. The ammonia solution dosage tank and the washing water tank are communicated with the filtering device through control valves. The structure is simple, operation is rapid, waste water is processed effectively and recycled, and the processing cost is lowered.

Description

technical field [0001] The invention relates to a chemical wastewater treatment technology, in particular to a method for advanced treatment and recovery of raffinate sewage in the nickel-cobalt hydrometallurgy industry by using an adsorption material, and belongs to the technical field of environmental governance and resource regeneration projects. Background technique [0002] In nickel and cobalt hydrometallurgical production process, with P 507 After extraction and separation of nickel and cobalt by the extractant, the raffinate water still contains a small amount of nickel and cobalt ions. If this is not effectively recovered, it will not only waste limited resources but also inevitably pollute the surrounding environment after discharge; for this reason, related companies usually The best treatment and recovery method is to precipitate nickel and cobalt ions into hydroxides or sulfides with liquid caustic soda, lime or soda sulfide and then filter. Although this proces...

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Problems solved by technology

[0002] In nickel and cobalt hydrometallurgical production process, with P 507 After extraction and separation of nickel and cobalt by the extractant, the raffinate water still contains a small amount of nickel and cobalt ions. If this is not effectively recovered, it will not only waste limited resources but also inevitably pollute the surrounding environment after discharge; for this reason, related companies usually The best treatment and recovery method is to precipitate nickel and cobalt ions into hydroxides or sulfides with liquid caustic soda, lime or soda sulfide and then filter. Although this process is simple, reliable and easy to implement, the filtered sewage still contains 1.0 to 5.0 Nickel and cobalt of about mg / l are difficult to completely precipitate and recover. In order to meet the national sewage standards, most enterprises have to add other fresh water for dilution, resulting in the waste of fresh water and the expansion of industrial sewage water.

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