Concentrated acid fractional distillation treatment process for copper ammonia concentrated liquid of circuit board
A treatment process and circuit board technology, which is applied in the field of circuit board cuproammonia concentrated liquid wastewater treatment process, can solve the problems of extractant ammonia extraction reaction, complex process, high investment, etc., and achieve low processing difficulty, simple electrowinning process, and high reaction rate. short process effect
Inactive Publication Date: 2017-04-26
江门市崖门新财富环保工业有限公司
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Problems solved by technology
[0004] The use of extraction + electrowinning closed process equipment requires high investment, complex process, and high process operation requirements
[0005] The use of extraction + electrowinning cycle closed process also encounters related process problems: (1) The extraction agent has ammonia extraction reaction
Therefore, the trapped ammonium chloride enters the stripping tank and causes the accumulation of chloride ions in the electrolyzer
(3) The washing and stratification of the extractant is not ideal, slow and the water is unclear
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[0013] refer to figure 1 , circuit board copper ammonia concentrated liquid concentrated acid fractionation treatment process, the steps are as follows: first add concentrated sulfuric acid to the high temperature resistant reaction tank, the concentration of concentrated sulfuric acid is 98%; then add concentrated copper evenly and slowly to the concentrated sulfuric acid in the reaction tank Ammonia wastewater, after the concentrated copper ammonia wastewater is mixed with concentrated sulfuric acid, a strong bumping reaction will occur, and the temperature and pressure of the reaction tank will be greatly increased, so that the water and ammonia in the concentrated solution will evaporate due to the increase in temperature Fractional distillation, followed by condensation to form ammonia water; with the addition of concentrated copper ammonia wastewater, copper sulfate crystals are continuously produced in the reaction liquid, and as the reaction progresses, the concentrated...
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The invention discloses a concentrated acid fractional distillation treatment process for copper ammonia concentrated liquid of a circuit board. The concentrated acid fractional distillation treatment process comprises the following steps: firstly, adding concentrated sulfuric acid into a reaction tank; secondly, uniformly and slowly adding concentrated copper ammonia wastewater into the concentrated sulfuric acid in the reaction tank; mixing the added concentrated copper ammonia wastewater with the concentrated sulfuric acid to have a strong bumping reaction, so as to greatly raise temperature and pressure of the reaction tank; after raising the temperature of water and ammonia in the concentrated liquid, carrying out evaporation and fractional distillation, and then condensing to form ammonia water; when adding the concentrated copper ammonia wastewater, continuously generating copper sulfate crystal in reacted liquid; and along a reaction, finishing the reaction when the concentrated sulfuric acid is changed into diluted acid copper wastewater. Compared with extraction and electric deposition processes, the operation is simple and a reaction process is short; the copper sulfate crystal can be recycled and the treatment difficulty of treated diluted acid is greatly reduced; or the process is used for adjusting the potential of hydrogen of other wastewater, and is economical and environment-friendly.
Description
technical field [0001] The invention relates to a treatment process for circuit board cuproammonia concentrated liquid wastewater. Background technique [0002] Circuit board copper ammonia concentrate wastewater contains a large amount of Cu(NH 3 ) 4 Cl 2 and NH 4 Cl and NH 3 .H 2 O. [0003] At present, the recycling process of circuit board copper ammonia concentrate mainly adopts chemical method and extraction method to recover copper. Chemical recovery can only produce feed-grade copper sulfate, which has low value. At present, most enterprises adopt the closed process of extraction + electrowinning cycle to produce more than 99% of cathode copper. [0004] The use of extraction + electrowinning closed process equipment requires high investment, complex process and high process operation requirements. [0005] The use of extraction + electrowinning cycle closure process also encounters related process problems: (1) The extraction agent has an ammonia extraction...
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Login to View More IPC IPC(8): C02F1/62C01G3/10
CPCC02F1/62C01G3/10
Inventor 吴裕信黄俊鹏曾昭伟黄可鉴吴国标赵振宁赵德忠颜炼秋梁川朱英杰
Owner 江门市崖门新财富环保工业有限公司