Processing technology of high-purity copper product for space flight and aviation

A technology of aerospace and processing technology, applied in the field of high-purity copper processing, can solve the problems of high industrial production cost, no electrolyte purification treatment, etc., and achieve the effects of simple equipment, improved surface quality, and reduced production costs

Pending Publication Date: 2022-04-08
CHENGDU HONGHUA ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of high-purity copper in this scheme can remove the difficult-to-remove impurities in high-purity copper, but the electrolyte is not purified, and the industrial production cost is relatively high

Method used

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  • Processing technology of high-purity copper product for space flight and aviation

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0033] In the present embodiment, a kind of processing technology of aerospace high-purity copper product comprises the following steps:

[0034] Step 1: acid adjustment, pump 68% nitric acid and pure water into the acid adjustment tank according to a certain ratio, adjust the pH value to 3, prepare nitric acid electrolyte, and then pump it into the liquid storage tank.

[0035] Step 2: filter to remove impurities, pass the pH-adjusted nitric acid electrolyte through a three-stage filter to remove impurities.

[0036] Step 3: Electrolysis. Use 4N high-purity copper plate as the anode plate and titanium plate as the cathode plate. First, wash off the oxide film on the surface of the anode plate and cathode plate with dilute hydrochloric acid, and put the cleaned anode plate and cathode plate into the electrolytic cell. And the filtered nitric acid electrolyte is pumped into the electrolytic cell.

[0037] To prepare an additive solution, bone glue, gelatin and thiourea were us...

Embodiment 3

[0042] In the present embodiment, a kind of processing technology of aerospace high-purity copper product comprises the following steps:

[0043] Step 1: acid adjustment, pump 68% nitric acid and pure water into the acid adjustment tank according to a certain ratio, adjust the pH value to 3, prepare nitric acid electrolyte, and then pump it into the liquid storage tank.

[0044] Step 2: filter to remove impurities, pass the pH-adjusted nitric acid electrolyte through a three-stage filter to remove impurities.

[0045] Step 3: Electrolysis. Use 4N high-purity copper plate as the anode plate and titanium plate as the cathode plate. First, wash off the oxide film on the surface of the anode plate and the cathode plate with dilute hydrochloric acid, and put the cleaned anode plate and cathode plate into the electrolytic cell. And the filtered nitric acid electrolyte is pumped into the electrolytic cell.

[0046] The additive solution was prepared, using bone glue, gelatin and thi...

Embodiment 4

[0051] In the present embodiment, a kind of processing technology of aerospace high-purity copper product comprises the following steps:

[0052] Step 1: acid adjustment, pump 68% nitric acid and pure water into the acid adjustment tank according to a certain ratio, adjust the pH value to 3, prepare nitric acid electrolyte, and then pump it into the liquid storage tank.

[0053] Step 2: filter to remove impurities, pass the pH-adjusted nitric acid electrolyte through a three-stage filter to remove impurities.

[0054] Step 3: Electrolysis. Use 4N high-purity copper plate as the anode plate and titanium plate as the cathode plate. First, wash off the oxide film on the surface of the anode plate and the cathode plate with dilute hydrochloric acid, and put the cleaned anode plate and cathode plate into the electrolytic cell. And the filtered nitric acid electrolyte is pumped into the electrolytic cell.

[0055] The additive solution was prepared, using bone glue, gelatin and thi...

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Abstract

The invention discloses a processing technology of a high-purity copper product for space flight and aviation, which comprises the following steps: acid regulation: 68% electronic-grade nitric acid and pure water are pumped into an acid regulation tank according to a certain proportion, the pH value is regulated to 3, a nitric acid electrolyte is prepared, and then the nitric acid electrolyte is pumped into a liquid pouring storage tank; filtering to remove impurities, namely removing impurities from the nitric acid electrolyte of which the pH is adjusted through a three-stage filter; electrolysis is conducted, specifically, a 4N high-purity copper plate serves as an anode plate, a titanium plate serves as a cathode plate, the nitric acid electrolyte obtained after filtering and impurity removal is pumped into an electrolytic bath, electrolysis circulation is started, direct-current electrolysis is conducted, and 7N high-purity copper is obtained on the cathode plate; and vacuum packaging is conducted, specifically, the cathode plate with copper deposited is cleaned and conveyed to a stripping unit to be stripped, stripped cathode copper is inspected, and vacuum packaging and warehousing are conducted after the cathode copper is inspected to be qualified. Impurities in the production process of the high-purity copper can be effectively removed, the electrolyte can be purified, the quality requirement of the high-purity copper is met, and meanwhile the industrial production cost of the high-purity copper is further reduced.

Description

technical field [0001] The invention relates to the technical field of high-purity copper processing, in particular to a processing technology for high-purity copper products used in aerospace. Background technique [0002] High-purity copper has good electrical conductivity, ductility, corrosion resistance and surface properties, low softening temperature, high thermal conductivity at extremely low temperatures, and excellent processing performance. It is widely used in electronics, communications, ultra- Guidance, aerospace and other cutting-edge technology fields. [0003] At present, the production of high-purity copper mainly adopts regional smelting, secondary (or tertiary) electrolysis and reduction production processes. The production efficiency of the regional smelting method is low, and it is difficult to form a large-scale production capacity; while the secondary electrolysis method involves two dissolution processes of sulfuric acid and nitric acid and requires ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12C25C7/06C25C7/08
CPCY02P10/20
Inventor 韦建敏张晓蓓赵兴文刘正斌张小波
Owner CHENGDU HONGHUA ENVIRONMENTAL SCI & TECH CO LTD
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