A method for preparing ultra-high purity copper-containing ingot

The preparation method using a three-stage heat treatment and refining process solves the problems of oxidation, shrinkage cavities, and impurities in ultra-high purity copper ingots during the smelting process, achieving high-purity and high-yield ingot production.

CN117265281BActive Publication Date: 2026-06-12SHANGHAI TONGCHUANG PURUN NEW MATERIALS CO LTD +1
View PDF 4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI TONGCHUANG PURUN NEW MATERIALS CO LTD
Filing Date
2023-09-25
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing technologies often result in defects such as shrinkage cavities, cracks, and oxidation during the preparation of ultra-high purity copper ingots, leading to low yields and difficulty in effectively controlling the impact of gaseous impurities on ingot purity.

⚗Method used

The preparation method employs a three-stage heat treatment combined with refining steps, including vacuuming, first-stage heat treatment, second-stage heat treatment, third-stage heat treatment and refining. By controlling the vacuum level, heating rate and gas replacement, oxidation and impurities are gradually removed, thereby improving the purity of the copper liquid.

🎯Benefits of technology

It effectively solves the problems of deoxidation, degassing and impurity removal in the smelting process, avoids shrinkage cavities, cracks and oxidation in ingots, and improves the purity and yield of ingots, with a purity of ≥6N.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure BDA0004467878530000121
    Figure BDA0004467878530000121
  • Figure BDA0004467878530000131
    Figure BDA0004467878530000131
Patent Text Reader

Abstract

The present application relates to a kind of preparation methods of ultra-high purity copper-containing ingot, the preparation method includes the following steps: (1) with round copper sheet as raw material, sequentially carry out vacuumizing treatment, first stage heat treatment, second stage heat treatment and third stage heat treatment, obtain copper liquid;(2) the copper liquid obtained in step (1) is refined, and obtain purifying liquid;(3) the purifying liquid obtained in step (2) is cast, and ultra-high purity copper-containing ingot is obtained.The preparation method provided by the present application can effectively solve the problems such as deoxidation, degassing and impurity removal in the smelting process, avoid ingot shrinkage, crack and oxidation, effectively improve the purity of ingot, and the yield is higher.
Need to check novelty before this filing date? Find Prior Art