CN111593373B - Production method of electrolytic copper powder for perforating charge - Google Patents
Production method of electrolytic copper powder for perforating charge Download PDFInfo
- Publication number
- CN111593373B CN111593373B CN202010670059.7A CN202010670059A CN111593373B CN 111593373 B CN111593373 B CN 111593373B CN 202010670059 A CN202010670059 A CN 202010670059A CN 111593373 B CN111593373 B CN 111593373B
- Authority
- CN
- China
- Prior art keywords
- drying
- air separation
- production method
- electrolysis
- controlled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 26
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 23
- 238000007790 scraping Methods 0.000 claims abstract description 22
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000009826 distribution Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C5/00—Electrolytic production, recovery or refining of metal powders or porous metal masses
- C25C5/02—Electrolytic production, recovery or refining of metal powders or porous metal masses from solutions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
- C25C7/08—Separating of deposited metals from the cathode
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention belongs to the technical field of electrolytic production of copper by a solution electrolytic method, and particularly relates to a production method of electrolytic copper powder for a perforating bullet. The production method of the electrolytic copper powder for the perforating bullet comprises the working procedures of electrolysis, powder scraping, washing, drying and air separation, wherein the current density is controlled to be 1000-1200A/m in the electrolysis process2The concentration of sulfuric acid is 160-180g/L, and the temperature of the electrolyte is 40-50 ℃. The copper powder prepared by the method has low apparent density (1.9-2.0 g/cm)3) The particle size distribution is narrow (100-200 meshes are larger than 95 percent), and the method can be well used for the perforating charge.
Description
Technical Field
The invention belongs to the technical field of electrolytic production of copper by a solution electrolytic method, and particularly relates to a production method of electrolytic copper powder for a perforating bullet.
Background
Copper powder is one of basic raw materials in the powder metallurgy industry, has the advantages of good electric conductivity and heat conductivity, corrosion resistance, surface smoothness, non-magnetism and the like, and is widely applied to industries such as friction materials, diamond tools, electric carbon products, oil-containing bearings, electric contact materials, conductive materials, mechanical parts and the like ("influence of process conditions on electrodeposition method for preparing copper powder", Guo academic benefit and the like, written by Beijing university of science and technology, No. 33, No. 2, No. 1 and No. 4 of the left column on page 182, and No. 12 and No. 31 of the published 2011).
At present, the preparation method of copper powder mainly comprises a reduction method, an electrolysis method, a hydrometallurgy method, an atomization method, a mechanical grinding method and the like. Among them, copper powder produced by electrolysis has advantages of high purity, clean surface, low apparent density, good compactibility (including formability and compressibility), easy alloying with other metals, etc. (research on electrolytic copper powder production process, xu-Chu-Fang, etc., powder metallurgy industry, vol. 16, No. 5, No. 2, lines 1-7, on the left column of page 16, published 2006, 10, 31; research on electrolytic copper powder preparation process, Zheng Jingwu, etc., powder metallurgy industry, vol. 11, No. 6, on the left column of page 26, lines 1, 2, on the 1, lines 12, 31, published 2001).
Perforating charges are initiating agents used to penetrate casing, cement sheath, and formation during perforating. The perforating charge is the most critical part of the perforating gun, and the technical performance of the perforating charge directly influences the specific indexes of the parameters aperture and hole depth. The electrolytic copper powder is one of the main materials of the perforating charge, and the performance of the electrolytic copper powder determines the using performance of the perforating charge to a certain extent.
However, the existing copper powder is not well suited for use in a perforating charge.
Disclosure of Invention
In view of the above, the invention aims to provide a good method for producing electrolytic copper powder for perforating bullets.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the production method of electrolytic copper powder for perforating bullet includes the procedures of electrolysis, powder scraping, washing, drying and air separation, and in the course of electrolysis the current density is controlled to be 1000-1200A/m2The concentration of sulfuric acid is 160-150g/L, and the temperature of the electrolyte is 40-50 ℃.
In the present invention, the perforating charge refers to initiating explosive used for penetrating a casing, a cement sheath and a stratum during perforating.
Further, the powder scraping period is controlled to be 120-150 min.
Further, water used in the washing process is pure water.
Further, the parameters in the drying process are set as follows: the drying temperature is 200-300 ℃, and the drying time is 180-240 min.
Further, the air separation is carried out by adopting an air separation type airflow crusher.
Further, the production method of the electrolytic copper powder for the perforating charge comprises electrolysis and scrapingThe working procedures of powder, washing, drying and air separation, wherein the current density is controlled to be 1000-1200A/m in the electrolysis process2The concentration of sulfuric acid is 160-180g/L, and the temperature of the electrolyte is 40-50 ℃; the powder scraping period is controlled to be 120-150 min; the water used in the washing process is pure water; the parameters in the drying process are set as follows: the drying temperature is 200-; the air separation is carried out by an air separation type airflow crusher. The invention has the beneficial effects that:
the copper powder prepared by the method has low apparent density (1.9-2.0 g/cm)3) The particle size distribution is narrow (100-200 meshes are larger than 95 percent), and the method can be well used for the perforating charge.
The production method is simple and is beneficial to realizing industrial production.
Detailed Description
The examples are provided for better illustration of the present invention, but the present invention is not limited to the examples. Therefore, those skilled in the art should make insubstantial modifications and adaptations to the embodiments of the present invention in light of the above teachings and remain within the scope of the invention.
Part 1 of the following determination of apparent Density of Metal powders according to GB/T1479.1-2011: carrying out detection by a funnel method;
the following particle size distribution (100-.
Example 1
The production method of electrolytic copper powder for perforating charge includes the procedures of electrolysis, scraping powder, washing, drying and air-selecting, in which,
controlling the current density to be 1000A/m in the electrolytic process2The concentration of sulfuric acid is 180g/L, and the temperature of electrolyte is 50 ℃;
the powder scraping period is controlled to be 120 min;
the water used in the washing process is pure water;
the parameters in the drying process are set as follows: the drying temperature is 300 ℃, and the drying time is 180 min;
the air separation is carried out by an air separation type airflow crusher.
Example 2
The production method of electrolytic copper powder for perforating charge includes the procedures of electrolysis, scraping powder, washing, drying and air-selecting, in which,
controlling the current density to be 1100A/m in the electrolytic process2The concentration of sulfuric acid is 170g/L, and the temperature of the electrolyte is 45 ℃;
the powder scraping period is controlled to be 135 min;
the water used in the washing process is pure water;
the parameters in the drying process are as follows: the drying temperature is 250 ℃, and the drying time is 210 min;
the air separation is carried out by an air separation type airflow crusher.
Example 3
The production method of electrolytic copper powder for perforating charge includes the procedures of electrolysis, scraping powder, washing, drying and air-selecting, in which,
controlling the current density to be 1200A/m in the electrolytic process2The concentration of sulfuric acid is 160g/L, and the temperature of the electrolyte is 40 ℃;
the powder scraping period is controlled to be 150 min;
the water used in the washing process is pure water;
the parameters in the drying process are set as follows: the drying temperature is 200 ℃, and the drying time is 240 min;
the air separation is carried out by an air separation type airflow crusher.
Comparative example 1
The production method of electrolytic copper powder for perforating charge includes the procedures of electrolysis, scraping powder, washing, drying and air-selecting, in which,
controlling the current density to be 1300A/m in the electrolytic process2The concentration of sulfuric acid is 150g/L, and the temperature of electrolyte is 35 ℃;
the powder scraping period is controlled to be 165 min;
the water used in the washing process is pure water;
the parameters in the drying process are as follows: the drying temperature is 300 ℃, and the drying time is 180 min;
the air separation is carried out by an air separation type airflow crusher.
Comparative example 2
The production method of electrolytic copper powder for perforating charge includes the procedures of electrolysis, scraping powder, washing, drying and air-selecting, in which,
controlling the current density to be 900A/m in the electrolytic process2The concentration of sulfuric acid is 190g/L, and the temperature of electrolyte is 55 ℃;
the powder scraping period is controlled to be 105 min;
the water used in the washing process is pure water;
the parameters in the drying process are as follows: the drying temperature is 300 ℃, and the drying time is 180 min;
the air separation is carried out by an air separation type airflow crusher.
Performance detection
The apparent density and particle size distribution (100 mesh and 200 mesh) of the copper powders obtained in examples 1-3 and comparative examples 1-2 were measured, and the results are shown in Table 1.
TABLE 1 Performance test results
| Source | Apparent density/(g/cm)3) | Particle size distribution (100- |
| Example 1 | 1.93 | 96.2 |
| Example 2 | 1.95 | 96.8 |
| Example 3 | 1.96 | 96.6 |
| Comparative example 1 | 2.09 | 94.4 |
| Comparative example 2 | 2.13 | 93.5 |
As can be seen from table 1, the apparent densities of the copper powders obtained in examples 1 to 3 were significantly reduced and the particle size distributions were narrowed as compared with comparative examples 1 and 2. Therefore, the copper powder prepared by the method can be well used for the perforating charge.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The production method of electrolytic copper powder for perforating bullets comprises the working procedures of electrolysis, powder scraping, washing, drying and air separation, and is characterized in that the current density is controlled to be 1000-1200A/m in the electrolysis process2The concentration of sulfuric acid is 160-180g/L, and the temperature of the electrolyte is 40-50 ℃; the powder scraping period is controlled at 120-150 min.
2. The production method according to claim 1, wherein the water used in the washing process is pure water.
3. The production method according to claim 1 or 2, wherein the parameters during the drying process are set as: the drying temperature is 200-300 ℃, and the drying time is 180-240 min.
4. The production process according to claim 1 or 2, wherein the air separation is carried out by an air separation type air current breaker.
5. The method of claim 3, wherein the air classification is performed using an air classification jet mill.
6. The production method as claimed in claim 1, 2 or 5, comprising the steps of electrolysis, powder scraping, washing, drying and air separation, wherein the current density is controlled to be 1000-2The concentration of sulfuric acid is 160-180g/L, and the temperature of the electrolyte is 40-50 ℃; the powder scraping period is controlled to be 120-150 min; the water used in the washing process is pure water; the parameters in the drying process are as follows: the drying temperature is 200-; the air separation is carried out by an air separation type airflow crusher.
7. The production method according to claim 3, comprising the steps of electrolysis, powder scraping, washing, drying and air separation, wherein the current density is controlled to be 1000-1200A/m during the electrolysis process2The concentration of sulfuric acid is 160-180g/L, and the temperature of the electrolyte is 40-50 ℃; the powder scraping period is controlled to be 120-150 min; the water used in the washing process is pure water; the parameters in the drying process are as follows: the drying temperature is 200-; the air separation is carried out by an air separation type airflow crusher.
8. The production method as claimed in claim 4, comprising the steps of electrolysis, powder scraping, washing, drying and air separation, wherein the current density is controlled to be 1000-1200A/m during the electrolysis process2The concentration of sulfuric acid is 160-180g/L, and the temperature of the electrolyte is 40-50 ℃; the powder scraping period is controlled to be 120-150 min; the water used in the washing process is pure water; the parameters in the drying process are as follows: the drying temperature is 200-; winnowing type airflow crusher for winnowingAnd (6) processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670059.7A CN111593373B (en) | 2020-07-13 | 2020-07-13 | Production method of electrolytic copper powder for perforating charge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670059.7A CN111593373B (en) | 2020-07-13 | 2020-07-13 | Production method of electrolytic copper powder for perforating charge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111593373A CN111593373A (en) | 2020-08-28 |
| CN111593373B true CN111593373B (en) | 2022-06-17 |
Family
ID=72185058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010670059.7A Active CN111593373B (en) | 2020-07-13 | 2020-07-13 | Production method of electrolytic copper powder for perforating charge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111593373B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02138492A (en) * | 1988-11-18 | 1990-05-28 | Fukuda Metal Foil & Powder Co Ltd | Production of fine copper powder |
| CN1670258A (en) * | 2005-02-06 | 2005-09-21 | 金川集团有限公司 | Method for producing copper powder by electrodeposition |
| JP2013216934A (en) * | 2012-04-06 | 2013-10-24 | Sumitomo Metal Mining Co Ltd | Method for producing electrolytic copper powder, method for producing copper ii oxide fine powder, and method for feeding copper ion of aqueous copper sulfate solution |
| CN103866352A (en) * | 2012-12-17 | 2014-06-18 | 重庆华浩冶炼有限公司 | Producing method of electrolytic copper powder |
| CN104475722A (en) * | 2014-11-12 | 2015-04-01 | 有研粉末新材料（北京）有限公司 | Low-lead, low-apparent-density high-branch-shaped electrolytic copper powder and preparation method thereof |
| JP2015168867A (en) * | 2014-03-10 | 2015-09-28 | 住友金属鉱山株式会社 | Sulfuric acid-based copper electrolyte, and production method of dendrite-like copper powder using the same |
| CN106906492A (en) * | 2017-04-19 | 2017-06-30 | 重庆科技学院 | Copper powder electrolysis unit and electrolytic method |
| CN109252190A (en) * | 2018-11-07 | 2019-01-22 | 广州市吉池环保科技有限公司 | A method of it recycling 99.98% copper powder from etching solution and prepares 99.999% tough cathode |
| CN110387560A (en) * | 2019-07-26 | 2019-10-29 | 紫金矿业集团黄金冶炼有限公司 | A kind of method that once electrolytic prepares 5N high purity copper |
| CN110697756A (en) * | 2019-10-26 | 2020-01-17 | 韩亚半导体材料(贵溪)有限公司 | Production process of high-purity copper oxide powder for integrated circuit |
-
2020
- 2020-07-13 CN CN202010670059.7A patent/CN111593373B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02138492A (en) * | 1988-11-18 | 1990-05-28 | Fukuda Metal Foil & Powder Co Ltd | Production of fine copper powder |
| CN1670258A (en) * | 2005-02-06 | 2005-09-21 | 金川集团有限公司 | Method for producing copper powder by electrodeposition |
| JP2013216934A (en) * | 2012-04-06 | 2013-10-24 | Sumitomo Metal Mining Co Ltd | Method for producing electrolytic copper powder, method for producing copper ii oxide fine powder, and method for feeding copper ion of aqueous copper sulfate solution |
| CN103866352A (en) * | 2012-12-17 | 2014-06-18 | 重庆华浩冶炼有限公司 | Producing method of electrolytic copper powder |
| JP2015168867A (en) * | 2014-03-10 | 2015-09-28 | 住友金属鉱山株式会社 | Sulfuric acid-based copper electrolyte, and production method of dendrite-like copper powder using the same |
| CN104475722A (en) * | 2014-11-12 | 2015-04-01 | 有研粉末新材料（北京）有限公司 | Low-lead, low-apparent-density high-branch-shaped electrolytic copper powder and preparation method thereof |
| CN106906492A (en) * | 2017-04-19 | 2017-06-30 | 重庆科技学院 | Copper powder electrolysis unit and electrolytic method |
| CN109252190A (en) * | 2018-11-07 | 2019-01-22 | 广州市吉池环保科技有限公司 | A method of it recycling 99.98% copper powder from etching solution and prepares 99.999% tough cathode |
| CN110387560A (en) * | 2019-07-26 | 2019-10-29 | 紫金矿业集团黄金冶炼有限公司 | A kind of method that once electrolytic prepares 5N high purity copper |
| CN110697756A (en) * | 2019-10-26 | 2020-01-17 | 韩亚半导体材料(贵溪)有限公司 | Production process of high-purity copper oxide powder for integrated circuit |
Non-Patent Citations (3)
| Title |
|---|
| 电积法生产铜粉的开发与研制;陈自江;《中国有色冶金》;20100815(第04期);第59-64页 * |
| 电解法制取金属铜粉;杨玉其;《铜业工程》;20070915(第03期);第20-21和4页 * |
| 电解法制备超细铜粉的工艺及性能研究;徐瑞东等;《电子工艺技术》;20061130(第06期);第355-359页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111593373A (en) | 2020-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102925746B (en) | High-performance Cu-Ni-Si system copper alloy, and preparation method and processing method thereof | |
| CN100343403C (en) | Rare earth copper alloy and its preparation method | |
| CN105551688A (en) | Preparation method of high-accuracy anaerobic bright copper bar | |
| CN109161727B (en) | Titanium alloy for manufacturing electric arc/electron beam fuse additive and preparation method thereof | |
| CN101539163B (en) | Manufacturing method of anti-delayed fracture 16.9 grade bolt | |
| CN109266901B (en) | Preparation method of Cu15Ni8Sn high-strength wear-resistant alloy rod/wire | |
| CN106001160A (en) | Production technology of high-purity and high-conductivity oxygen-free copper strips | |
| CN102808090A (en) | Device and method for preparing ultrahigh-purity metal magnesium from industrial pure magnesium | |
| CN102888525A (en) | Processing method of high-obdurability and high-conductivity copper magnesium alloy | |
| CN111593373B (en) | Production method of electrolytic copper powder for perforating charge | |
| CN106216423A (en) | A kind of production technology of ceramic copper-clad base plate high connductivity oxygen-free copper stripe | |
| CN106011852B (en) | A kind of preparation method of austenite stainless steel surface high entropy alloy coating | |
| CN105112829A (en) | Hard copper busbar annealing method, processed hard copper busbar product and conductive part | |
| CN104278177A (en) | Material for cam shaft and molding and manufacturing method of cam shaft | |
| CN102121123A (en) | Vanadium metal smelting process | |
| WO2017070806A1 (en) | High-strength titanium carbide particle-reinforced copper-based composite material and preparation method therefor | |
| CN103146939B (en) | Method for reducing content of lead in lead brass | |
| Xu et al. | Current efficiency of recycling aluminum from aluminum scraps by electrolysis | |
| CN105506359B (en) | A kind of socket anticorrosive wear-resistant high conductivity alloy | |
| CN112210692A (en) | Beryllium bronze long guide rail and manufacturing method thereof | |
| CN107983963B (en) | Low-temperature preparation method of pure nano W-Cu composite powder | |
| Randhawa et al. | Direct electrolytic refining of end-of-life industrial copper waste scraps for production of high purity copper powder | |
| Najim | Estimation of Mass Transfer Coefficient for Copper Electrowinning Process | |
| CN105483426B (en) | A kind of socket antifriction alloy | |
| CN113369301A (en) | Rolled copper foil for manufacturing copper mesh and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |