CN103131871A - Method for extracting pure copper and pure zinc from brass - Google Patents
Method for extracting pure copper and pure zinc from brass Download PDFInfo
- Publication number
- CN103131871A CN103131871A CN2013100600858A CN201310060085A CN103131871A CN 103131871 A CN103131871 A CN 103131871A CN 2013100600858 A CN2013100600858 A CN 2013100600858A CN 201310060085 A CN201310060085 A CN 201310060085A CN 103131871 A CN103131871 A CN 103131871A
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- smelting furnace
- zinc
- screw rod
- copper
- 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.)
- Granted
Links
Images
Abstract
The invention relates to a method for extracting copper and zinc from brass, and relates to a method for extracting pure copper and pure zinc from brass. The method comprises the steps that: (1) the raw material is smelted in a sealed smelting furnace; a screw is rotated, and a nitrogen gas charging operation is carried out upon the outlet of a feeding pipe and the inside of the smelting furnace through a hollow nitrogen channel in the screw; (2) gas pressure in the smelting furnace is regulated by charging nitrogen gas into the smelting furnace through a pressure-regulating observation port on a side wall of the smelting furnace; (3) zinc vapor and other carbide gases are cooled, such that pure zinc powder and solid carbide particles are formed; the two are separated, such that pure zinc powder is obtained; and (4) copper liquid is discharged from the bottom of the smelting furnace, such that pure copper is obtained. The pure copper and pure zinc extraction method is safe and convenient. With the method, the energy consumption is low; a problem of severe environment pollution of a traditional extraction method can be ameliorated; and pure copper and pure zinc can be extracted with high efficiency.
Description
Technical field
The present invention relates to a kind of method of extracting copper and zinc from brass.
Background technology
Brass is important metallic substance, is used widely.Can produce a large amount of brass scrap raw materials in the process of production and use brass ware, the price that producer processes brass scrap is only 1/10th of its raw material purchase price, and financial loss is very big.In order to control cost, just extract copper and zinc from brass, sell separately or recycling.
The method of mostly extracting at present copper and zinc from brass is mainly two kinds, a kind ofly be disclosed as " CN1113520 " as Chinese patent, name is called " reclaiming copper and Zinc hydrometallurgy method from copper zinc material " described " employing ammonia leaching copper zinc material; then adopt extraction process that copper zinc in leach liquor is separated; the long-pending electrolytic copper of producing of rich copper liquid power transmission; raffinate gets zinc subcarbonate through ammonia still process, send and calcines to get active zinc flower." deficiency that exists of the method is to obtain metallic copper and zinc oxide, and can not obtain simultaneously fine copper and pure zinc, zinc oxide is changed into pure zinc need to be through complicated treating processes, is not very worthwhile on cost.the most frequently used method of extracting copper and zinc from brass is to extract by the smelting furnace melting, by high temperature, brass is melted, and the copper that boiling point is high when low-boiling zinc becomes zinc fume has been realized the separation and Extraction of copper and zinc still for liquid, the deficiency that the method exists is that smelting furnace contains oxygen in its inner air when entrained air is melting in reinforced process, also contain the oxygen of trace in the oxidized so brass raw material of brass surfaces, especially partly smelting furnace is that its oxygen level of open type is larger, oxygen in smelting furnace can react with zinc fume and liquid copper, the cupric oxide in fact and the zinc oxide that finally obtain, and fine copper and cupric oxide, pure zinc and zinc oxide have very large gap on price, waste residue in stove is difficult to melt thoroughly in addition, the copper and the zinc that also contain some in the waste residue of therefore discharging.In sum, also can not extract in the market the method and apparatus of fine copper and pure zinc from brass.
Summary of the invention
Above-mentionedly can't to extract the problem of fine copper and pure zinc from brass in order solving, to the objective of the invention is to disclose a kind of energy consumption low, the method for fine copper and pure zinc of extracting from brass that economic worth is high.
In order to realize above-mentioned purpose, the present invention has adopted following technical scheme:
Extract the method for fine copper and pure zinc from brass, adopt following step:
(1) raw material is added carry out melting in airtight smelting furnace, feed-pipe and screw rod are set in smelting furnace, screw rod is in feed-pipe, screw rod rotation and by the hollow channel of nitrogen in screw rod to rushing the nitrogen operation in the outlet of feed-pipe and smelting furnace, the nitrogen that pours is no more than 80 ℃, and the air outlet of hollow channel of nitrogen is on the non-stress face of screw rod bottom; During melting, the interior temperature of smelting furnace remains between 950 ℃-1050 ℃; Raw material comprises brass, coke powder and quartz;
(2) regulate air pressure in smelting furnace by the inflated with nitrogen in the smelting furnace of the pressure regulation porthole on melting furnace wall, remain that the air pressure in smelting furnace is in barotropic state, the nitrogen temperature that pours is over 100 ℃;
(3) zinc fume that becomes of zinc boiling postforming, CO (carbon monoxide converter) gas that the coke powder burning forms and other carbide gas drain into refrigerating unit by the outlet of the zinc gas on smelting furnace and carry out cooling process, then carbon monoxide enters in the carbon monoxide storage tank, be respectively pure zinc powder and solid-state carbide particle after zinc fume and other carbide gas are cooling, both separation are namely obtained pure zinc powder;
(4) waste residue that is suspended on copper liquid is discharged from the airtight slag-drip opening of smelting furnace, and copper liquid is discharged from the smelting furnace bottom and obtained fine copper.
As preferably, described pure zinc powder separates by water with solid-state carbide particle.
As preferably, described pressure regulation porthole adds coke powder when pouring nitrogen, and the air pressure during melting in smelting furnace remains between 1Mpa-25Mpa.
As preferably, the described hollow tube that inserts in the pressure regulation porthole rushes nitrogen and the operation that adds coke powder, and by copper liquid in hollow tube stir-melting stove, rushing nitrogen pressurizes and has increased the smelting efficiency of smelting furnace, accelerated the dissolving of waste residue by pressurization, copper wherein, zinc and oxygen have been separated out, rush the chemical reaction that nitrogen has also completely cut off oxygen and copper, zinc, the copper that obtains and the purity of zinc have been guaranteed, add coke powder inhaling of oxygen burning again, namely this operation has further improved the purification efficiency of copper and zinc, has also improved the purification output of copper and zinc.Rush nitrogen itself and be exactly the chemical reaction for oxygen and copper, zinc, and the malleation in smelting furnace can prevent that air from entering.
As preferably, by the raw material in the lifting stir-melting stove of screw rod.
As preferably, the described coke powder gross weight that adds is the 1%-10% of brass weight, and the quartzy gross weight that adds is the 1%-10% of brass weight.
As preferably, describedly by the hollow channel of nitrogen in screw rod, the nitrogen operation is rushed in the outlet of feed-pipe and smelting furnace, the nitrogen that pours is no more than 0 ℃, and the effect of this nitrogen is the chemical reaction of cooling and isolating oxygen and copper, zinc, thus temperature to be no more than 0 ℃ of cooling-down effect better; When rushing nitrogen by the hollow channel of nitrogen in screw rod, the air outlet of hollow channel of nitrogen is in the top of copper liquid end face all the time, and security is good.
As preferably, the air outlet of described hollow channel of nitrogen is on the non-stress face of screw rod bottom.
As preferably, described smelting furnace comprise airtight body of heater and on feed-pipe and screw rod, the main part of feed-pipe and screw rod is in airtight body of heater, on the external feed-pipe of sealed furnace, opening for feed is set, screw rod is in feed-pipe, be provided for rushing the hollow channel of nitrogen of nitrogen in screw rod, it is external that the inlet mouth of hollow channel of nitrogen is in sealed furnace, and the air outlet of hollow channel of nitrogen is on the non-stress face of screw rod bottom; The top of airtight body of heater arranges the outlet of zinc gas, and the bottom of airtight body of heater arranges the outlet of copper liquid, and the sealed furnace body sidewall is provided with the pressure regulation porthole, and the below of pressure regulation porthole arranges airtight slag-drip opening, also is provided with the monitor of monitoring stove internal gas pressure on airtight body of heater.
Adopted the method for fine copper and pure zinc of extracting of such scheme from brass, adopted airtight body of heater to carry out melting to brass, not only completely cut off a large amount of air and reduced production energy consumption, and near the environment of effectively having controlled brass furnace has been not contaminated.screw rod rotation is also rushed the nitrogen operation by the hollow channel of nitrogen in screw rod to outlet and the smelting furnace of feed-pipe, the nitrogen that pours is no more than 80 ℃, an effect is that screw rod is lowered the temperature, prevent the overheated dilatational strain of screw rod, in case the overheated dilatational strain of screw rod just can't play the effect of stirring, especially screw rod is in feed-pipe, the air outlet of hollow channel of nitrogen is on the non-stress face of screw rod bottom has well protected screw rod, in a single day raw material falls into the copper liquid in smelting furnace, a large amount of hot gas comprises that ammonia will be toward rising, the effect that ejection nitrogen in screw rod this moment bottom can well play cooling prevents that hot gas from upwards making the screw rod upper deformation, prevent from simultaneously occuring in feed-pipe the situation of burning, this is also that screw rod is arranged on reason in feed-pipe, screw rod is exposed just easily distortion in airtight body of heater all, on the thrust surface of screw rod, screw rod just is very easy to damage if the air outlet of hollow channel of nitrogen is in, and above-mentioned design has guaranteed the work-ing life of screw rod.Rush the chemical reaction that nitrogen has also completely cut off oxygen and copper, zinc during charging, guaranteed the copper that obtains and the purity of zinc, can effectively control solution height in smelting furnace and charging situation etc. by screw rod, operate very convenient.During melting, the interior temperature of smelting furnace remains between 950 ℃-1050 ℃, this temperature makes zinc in brass transfer zinc fume to, copper in brass becomes liquid copper, make the lubricated wet goods organism on brass raw material surface become gaseous state, for condition has been created in the purification of copper and zinc, the too low above-mentioned requirements that do not reach of temperature, the too high energy consumption of temperature is high, waste greatlyr, especially more easily obtain pure zinc at the temperature of 950 ℃-1000 ℃.Regulate air pressure in smelting furnace by the inflated with nitrogen in the smelting furnace of the pressure regulation porthole on melting furnace wall, remain that the interior air pressure of smelting furnace is in barotropic state and prevents entering of air, the nitrogen temperature that pours is over 100 ℃, the nitrogen of this moment directly pours in the copper liquid of furnace bottom, and temperature is too low easily blasts.Carbon monoxide enters in the carbon monoxide storage tank, and carbon monoxide is to be formed by the burning such as coke powder, and carbide gas comes from the lubricating oil of brass surfaces and raw material other organic compound combustion.
In sum, the advantage that should extract the method for fine copper and pure zinc from brass is safe and convenient to use, the low large problem of environmental pollution of having improved traditional extracting method existence of energy consumption, and passable high efficiency extraction fine copper and pure zinc, economic worth is very high.
Description of drawings
Fig. 1: the structural representation of smelting furnace in the embodiment of the present invention.
Embodiment
Below in conjunction with Fig. 1, the specific embodiment of the present invention is made a detailed explanation.
The method of fine copper and pure zinc of extracting from brass as shown in Figure 1, adopt following step:
(1) raw material is added carry out melting in airtight smelting furnace, as shown in Figure 1, smelting furnace comprise airtight body of heater 1 and on feed-pipe 2 and screw rod 3, the main part of feed-pipe 2 and screw rod 3 is in airtight body of heater 1, on feed-pipe 2 outside airtight body of heater 1, opening for feed 21 is set, screw rod 3 is in feed-pipe 2, be provided for rushing the hollow channel of nitrogen 31 of nitrogen in screw rod 3, the inlet mouth of hollow channel of nitrogen is in outside airtight body of heater 1, and the air outlet 32 of hollow channel of nitrogen 31 is on the non-stress face of screw rod bottom; The top of airtight body of heater 1 arranges zinc gas outlet 13, the bottom of airtight body of heater 1 arranges copper liquid outlet 13, airtight body of heater 1 sidewall is provided with pressure regulation porthole 4, and the below of pressure regulation porthole 4 arranges airtight slag-drip opening 11, also is provided with the monitor of monitoring stove internal gas pressure on airtight body of heater 1; Rush the nitrogen operation in screw rod 3 rotation and the outlet by the 31 pairs of feed-pipes 2 of hollow channel of nitrogen in screw rod 3 and smelting furnace, the nitrogen that pours is no more than 80 ℃, and the air outlet 32 of hollow channel of nitrogen 31 is on the non-stress face of screw rod bottom; During melting, the interior temperature of smelting furnace remains between 950 ℃-1050 ℃; Raw material comprises brass, coke powder and quartz;
(2) regulate air pressure in smelting furnace by the inflated with nitrogen in the smelting furnace of the pressure regulation porthole 4 on melting furnace wall, remain that the air pressure in smelting furnace is in barotropic state, the nitrogen temperature that pours is over 100 ℃;
(3) zinc fume that becomes of liquid Zn boiling postforming, CO (carbon monoxide converter) gas that the coke powder burning forms and other carbide gas drain into refrigerating unit by the outlet of the zinc gas on smelting furnace 13 and carry out cooling process, then carbon monoxide enters in the carbon monoxide storage tank, be respectively pure zinc powder and solid-state carbide particle after zinc fume and other carbide gas are cooling, both separation are namely obtained pure zinc powder, and specifically pure zinc powder separates by water difference by weight with solid-state carbide particle;
(4) coke powder and the quartzy waste residue that waits that are suspended on copper liquid are discharged from the airtight slag-drip opening 11 of smelting furnace, and copper liquid is discharged from the smelting furnace bottom and obtained fine copper.
Above-mentioned pressure regulation porthole 4 adds coke powder when pouring nitrogen, the air pressure during melting in smelting furnace remains between 1Mpa-25Mpa.Insert the operation that hollow tube 41 rushes nitrogen and adds coke powder in the pressure regulation porthole, and by copper liquid in hollow tube 41 stir-melting stoves, rushing nitrogen pressurizes and has increased the smelting efficiency of smelting furnace, accelerated the dissolving of waste residue by pressurization, copper wherein, zinc and oxygen have further been separated out, rush the chemical reaction that nitrogen has also completely cut off oxygen and copper, zinc, the copper that obtains and the purity of zinc have been guaranteed, add coke powder inhaling of oxygen burning again, namely this operation has further improved the purification efficiency of copper and zinc, has separated out the purification amount that copper in the waste residue and zinc have also improved copper and zinc.Hollow tube 41 is only rushing nitrogen and is using when adding coke powder, and used time hollow tube 41 is not removed pressure regulation porthole 4 and is airtight state.Rush nitrogen itself and be exactly the chemical reaction for oxygen and copper, zinc, and the malleation in smelting furnace can prevent that air from entering.The above-mentioned coke powder gross weight that adds is the 1%-10% of brass weight, and the quartzy gross weight that adds is the 1%-10% of brass weight, by the raw material in the lifting stir-melting stove of screw rod 3.Above-mentionedly by the hollow channel of nitrogen in screw rod 3, outlet and the smelting furnace of feed-pipe 2 rushed the nitrogen operation, the nitrogen that pours is no more than 0 ℃, the effect of this nitrogen is the chemical reaction of cooling and isolating oxygen and copper, zinc, therefore to be no more than 0 ℃ of cooling-down effect better for temperature, when rushing nitrogen by the hollow channel of nitrogen 31 in screw rod 3, the air outlet 32 of hollow channel of nitrogen 31 is in the top of copper liquid end face all the time, and security is good.
Claims (9)
1. extract the method for fine copper and pure zinc from brass, it is characterized in that adopting following step:
(1) raw material is added carry out melting in airtight smelting furnace, feed-pipe and screw rod are set in smelting furnace, screw rod is in feed-pipe, screw rod rotation and by the hollow channel of nitrogen in screw rod to rushing the nitrogen operation in the outlet of feed-pipe and smelting furnace, the nitrogen that pours is no more than 80 ℃, and the air outlet of hollow channel of nitrogen is on the non-stress face of screw rod bottom; During melting, the interior temperature of smelting furnace remains between 950 ℃-1050 ℃; Raw material comprises brass, coke powder and quartz;
(2) regulate air pressure in smelting furnace by the inflated with nitrogen in the smelting furnace of the pressure regulation porthole on melting furnace wall, remain that the air pressure in smelting furnace is in barotropic state, the nitrogen temperature that pours is over 100 ℃;
(3) zinc fume that becomes of zinc boiling postforming, CO (carbon monoxide converter) gas that the coke powder burning forms and other carbide gas drain into refrigerating unit by the outlet of the zinc gas on smelting furnace and carry out cooling process, then carbon monoxide enters in the carbon monoxide storage tank, be respectively pure zinc powder and solid-state carbide particle after zinc fume and other carbide gas are cooling, both separation are namely obtained pure zinc powder;
(4) waste residue that is suspended on copper liquid is discharged from the airtight slag-drip opening of smelting furnace, and copper liquid is discharged from the smelting furnace bottom and obtained fine copper.
2. the method for extracting fine copper and pure zinc from brass according to claim 1, is characterized in that pure zinc powder separates by water with solid-state carbide particle.
3. the method for extracting fine copper and pure zinc from brass according to claim 1, is characterized in that the pressure regulation porthole adds coke powder when pouring nitrogen, and the air pressure during melting in smelting furnace remains between 1Mpa-25Mpa.
4. the method for extracting fine copper and pure zinc from brass according to claim 3, is characterized in that inserting the operation that hollow tube rushes nitrogen and adds coke powder in the pressure regulation porthole, and by copper liquid in hollow tube stir-melting stove.
5. the method for extracting fine copper and pure zinc from brass according to claim 1, is characterized in that by the raw material in the lifting stir-melting stove of screw rod.
6. the method for extracting fine copper and pure zinc from brass according to claim 3, is characterized in that the coke powder gross weight that adds is the 1%-10% of brass weight, and the quartzy gross weight that adds is the 1%-10% of brass weight.
7. the method for extracting fine copper and pure zinc from brass according to claim 1, it is characterized in that describedly by the hollow channel of nitrogen in screw rod, the nitrogen operation being rushed in the outlet of feed-pipe and smelting furnace, the nitrogen that pours is no more than 0 ℃, and when rushing nitrogen by the hollow channel of nitrogen in screw rod, the air outlet of hollow channel of nitrogen is in the top of copper liquid end face all the time.
8. the method for extracting fine copper and pure zinc from brass according to claim 1, is characterized in that the air outlet of described hollow channel of nitrogen is on the non-stress face of screw rod bottom.
9. the method for extracting fine copper and pure zinc from brass according to claim 1, it is characterized in that smelting furnace comprise airtight body of heater and on feed-pipe and screw rod, the main part of feed-pipe and screw rod is in airtight body of heater, on the external feed-pipe of sealed furnace, opening for feed is set, screw rod is in feed-pipe, be provided for rushing the hollow channel of nitrogen of nitrogen in screw rod, it is external that the inlet mouth of hollow channel of nitrogen is in sealed furnace, and the air outlet of hollow channel of nitrogen is on the non-stress face of screw rod bottom; The top of airtight body of heater arranges the outlet of zinc gas, and the bottom of airtight body of heater arranges the outlet of copper liquid, and the sealed furnace body sidewall is provided with the pressure regulation porthole, and the below of pressure regulation porthole arranges airtight slag-drip opening, also is provided with the monitor of monitoring stove internal gas pressure on airtight body of heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310060085.8A CN103131871B (en) | 2013-02-26 | 2013-02-26 | Method for extracting pure copper and pure zinc from brass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310060085.8A CN103131871B (en) | 2013-02-26 | 2013-02-26 | Method for extracting pure copper and pure zinc from brass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103131871A true CN103131871A (en) | 2013-06-05 |
| CN103131871B CN103131871B (en) | 2014-03-26 |
Family
ID=48492319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310060085.8A Active CN103131871B (en) | 2013-02-26 | 2013-02-26 | Method for extracting pure copper and pure zinc from brass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103131871B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349792A (en) * | 2015-11-10 | 2016-02-24 | 广州科城环保科技有限公司 | Process for recycling brass furnace slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033322A (en) * | 1983-07-31 | 1985-02-20 | Matsushita Electric Works Ltd | Recovery of low-boiling point component |
| CN1113520A (en) * | 1994-06-13 | 1995-12-20 | 北京矿冶研究总院 | Hydrometallurgical process for the recovery of copper and zinc from copper and zinc materials |
| CN101597691A (en) * | 2009-07-27 | 2009-12-09 | 富阳申能固废环保再生有限公司 | The processing method of the nickeliferous solid waste of Treatment of Copper |
| CN102492859A (en) * | 2011-12-22 | 2012-06-13 | 云锡元江镍业有限责任公司 | Material charging method for laterite electric furnace smelting |
-
2013
- 2013-02-26 CN CN201310060085.8A patent/CN103131871B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033322A (en) * | 1983-07-31 | 1985-02-20 | Matsushita Electric Works Ltd | Recovery of low-boiling point component |
| CN1113520A (en) * | 1994-06-13 | 1995-12-20 | 北京矿冶研究总院 | Hydrometallurgical process for the recovery of copper and zinc from copper and zinc materials |
| CN101597691A (en) * | 2009-07-27 | 2009-12-09 | 富阳申能固废环保再生有限公司 | The processing method of the nickeliferous solid waste of Treatment of Copper |
| CN102492859A (en) * | 2011-12-22 | 2012-06-13 | 云锡元江镍业有限责任公司 | Material charging method for laterite electric furnace smelting |
Non-Patent Citations (1)
| Title |
|---|
| 王彤等: "黄铜水平连铸覆盖物渣中Cu、Zn的浸出", 《贵州科学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349792A (en) * | 2015-11-10 | 2016-02-24 | 广州科城环保科技有限公司 | Process for recycling brass furnace slag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103131871B (en) | 2014-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103924094B (en) | A kind of method processing copper scum silica frost | |
| CN210048827U (en) | Short-process copper smelting system | |
| US9963761B2 (en) | Method and apparatus for secondary enrichment and recovery of germanium from low-grade lignite germanium concentrates with by microwave heating in vacuum | |
| CN101705372A (en) | Process for extracting tin from wet lead with high tin content | |
| CN111457735A (en) | Integrated pyrometallurgical furnace and method for treating zinc leaching residues | |
| CN105087952A (en) | Method for removing sulfur and gathering copper, silver and antimony from sulfur-containing multi-metal smelting slag through vacuum distillation | |
| CN104073650B (en) | One reclaims zinc technology from tin metallurgy electric furnace dust | |
| CN102690947A (en) | Smelting process of silver concentrate | |
| CN108642303B (en) | Vacuum smelting method of zinc oxide ore | |
| CN102382992A (en) | Method for treating high-antimony low-silver-tin anode slime | |
| WO2018228075A1 (en) | Method and system for short-process copper smelting | |
| CN103131871B (en) | Method for extracting pure copper and pure zinc from brass | |
| CN104060089B (en) | A kind of method and smelting furnace processing high-iron multi-metal zinc concentrate | |
| CN203065554U (en) | Device for extracting pure copper and pure zinc from brass | |
| CN103160692B (en) | Brass smelting furnace | |
| CN207130313U (en) | A kind of system for handling utilising zinc containing waste residue | |
| CN204058569U (en) | A kind of system of vacuum distilling separating-purifying bismuth | |
| CN203451593U (en) | Smelting device for smelting titanium by utilizing blast-furnace titanium slag | |
| CN103146929B (en) | Efficient enrichment and recycling technique of valuable metals in lead smelting slags | |
| CN111074076A (en) | Comprehensive utilization system and method for metallurgical solid waste | |
| CN103122416B (en) | Equipment for extracting pure copper and pure zinc from brass and using method thereof | |
| CN101812597B (en) | Secondary refining process for silver | |
| CN203065547U (en) | Brass smelting furnace | |
| CN113060708A (en) | Production equipment of high-purity selenium and process for preparing high-purity selenium by using production equipment | |
| CN103131864A (en) | Method for pre-treating complex indium-containing smoke dust by microwave roasting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: CIXI JIUFA COPPER CO., LTD. Free format text: FORMER OWNER: SHI HANXIANG Effective date: 20140117 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20140117 Address after: 315301, Ningbo City, Zhejiang province Cixi Han Han Street Village historian Applicant after: CIXI JIUFA COPPER CO., LTD. Address before: 315301, No. 9, group 19, historian village, Zong Han street, Cixi City, Zhejiang, Ningbo Applicant before: Shi Hanxiang |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |