CN108048672A - The extraction stove and extracting method of germanium in low-grade germanium concentrate are extracted in thermal reduction volatilization - Google Patents
The extraction stove and extracting method of germanium in low-grade germanium concentrate are extracted in thermal reduction volatilization Download PDFInfo
- Publication number
- CN108048672A CN108048672A CN201810115436.3A CN201810115436A CN108048672A CN 108048672 A CN108048672 A CN 108048672A CN 201810115436 A CN201810115436 A CN 201810115436A CN 108048672 A CN108048672 A CN 108048672A
- Authority
- CN
- China
- Prior art keywords
- germanium
- furnace body
- volatilization
- grade
- low
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B41/00—Obtaining germanium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/06—Dry methods smelting of sulfides or formation of mattes by carbides or the like
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A kind of extraction stove and extracting method for heat-treating volatilization and extracting germanium in low-grade germanium concentrate, it is especially a kind of that evaporation method is heat-treated using high temperature, extract the extraction stove and extracting method of germanium in low-grade germanium concentrate.The extraction stove of the present invention includes the volatilization furnace, cooler and the dust-precipitator that are linked in sequence, volatilization furnace includes shell, furnace body, partition plate, guide rail, heat insulation foam and resistive heater, outer cover suit is outside furnace body, heat insulation foam is filled in the gap between shell and furnace body, and resistive heater is arranged on furnace body outer wall；Partition plate is two pieces, is fixed on the top inner wall of furnace body vertically, furnace interior is divided into three parts, from front to back respectively preheating zone, high-temperature constant warm area and cooling zone；Guide rail is arranged on upper position among furnace body.The present invention adopts three-stage and carries germanium stove, and optimization puies forward germanium flow, reduces thermal loss, improves the enrichment times of germanium mining and metallurgy refining and the grade of germanium concentrate, the germanium concentrate grade of gained is high, can reach more than 20%, be conducive to subsequent technique.
Description
Technical field
The present invention relates to germanium to recycle extraction equipment, especially a kind of to heat-treat evaporation method using high temperature, and extraction is low-grade
The extraction stove and extracting method of germanium in germanium concentrate.
Background technology
In recent years, with the continuous exploitation of germanium ore resources, good germanium ore deposit is fewer and fewer, and Ge content is constantly declining, and passes
The grade for the germanium concentrate that system pyrometallurgical smelting equipment, technique and technology obtain is more and more lower, generally the section model in 0.5%-2%
It encloses.Mainly have to the treatment process of germanium ore deposit both at home and abroad at present：Ion-exchange, emulsion liquid membrane extraction, classical chloridising, zinc dust precipitation
Method, tannin precipitation method etc..The method that germanium is carried from coal is summed up, and is divided into as fire smelting method, hydrometallurgy and extraction.Hydrometallurgy is
Germanium is directly extracted from coal, it is simple for process, but salt acid consumption is big, and industrialization is of high cost；Extraction is for fear of alternative high
It is less and expensive to imitate extractant, mainly there is Lix63, Kelexl100, TOA, Ywl etc..External some enterprises extraction lignite
In germanium mainly using medium temperature or High-temperature carbonization coal, the compound volatilizing and enriching of germanium is made then to use wet underwater welding again in tar
Germanium；Beijing Mine and Metallurgy General Inst has researched and developed technique of the HGS98 germanium extractant for extraction and recovery germanium；Zhuzhou Smelter was once adopted
With zinc replacement synthetical recovery germanium；Belgian Hoboken companies in shaft furnace to carrying out reduction volatilization germanium-extracting technology progress
Research.But in above-mentioned process and research, the germanium concentrate grade that generally existing obtains is low, and germanium ore deposit enrichment times are not
Height, it is low that rear end process chlorination puies forward the germanium rate of recovery, and production cost is high, the three wastes of generation：The harmless treatment of residual acid, residue, exhaust gas
The problem of pressure is big.
U.S. Patent Office discloses a kind of destructive distillation coal direct at higher than 800 DEG C, makes the compound volatilizing and enriching of germanium in coke
In oil, then with the technique of germanium in solvent extraction and coprecipitation extraction coal.In addition Tokyo a company applies for a patent
Also using the method extraction germanium of destructive distillation, technology is mainly concerned with electrostatic separation lignite woody part, destructive distillation enriched germanium etc..
The content of the invention
The to be solved of the present invention is exactly problem present in current germanium ore deposit processing, is provided a kind of using high temperature thermal reduction
The extraction stove of germanium and extraction side in low-grade germanium concentrate are extracted in evaporation method, the thermal reduction volatilization for extracting germanium in low-grade germanium concentrate
Method.
The extraction stove of germanium in low-grade germanium concentrate is extracted in the thermal reduction volatilization of the present invention, it is characterised in that the extraction stove includes
Volatilization furnace, cooler and the dust-precipitator being linked in sequence, volatilization furnace include shell, furnace body, partition plate, guide rail, heat insulation foam and add
Hot water radiation wire, outside furnace body, heat insulation foam is filled in the gap between shell and furnace body outer cover suit, and resistive heater is set
On furnace body outer wall；Partition plate is two pieces, is fixed on the top inner wall of furnace body vertically, furnace interior is divided into three parts, in the past
To rear respectively preheating zone, high-temperature constant warm area and cooling zone；Guide rail is arranged on upper position among furnace body, height be less than every
Plate minimum point, the charging tray equipped with low-grade lignite germanium concentrate is placed on guide rail, and charging tray slides on guide rail.
Volatilization gas collecting pipe is additionally provided on the cooler, cooler is connected by volatilization gas collecting pipe and furnace body
It connects, the air inlet of volatilization gas collecting pipe is fixed at the top of the furnace body of high-temperature constant warm area.
The lower portion of furnace body is additionally provided with air admission hole, and inert gas is filled with furnace interior by air admission hole.
A kind of extracting method for heat-treating volatilization and extracting germanium in low-grade germanium concentrate, it is characterised in that the extracting method includes
Following steps：
1）Argon gas is filled with furnace interior by air admission hole, is continually fed into 30 minutes, gas flow 240-300m3/ h so that
Furnace interior is stuffed entirely with argon gas；
2）By low-grade lignite germanium concentrate and potassium borohydride, uniformly tile and be put into charging tray after mixing, and charging tray is placed on and is led
On rail, it is sent into from furnace body inlet in furnace body；
3）Charging tray is pushed by guide rail in preheating zone and is preheated, preheating zone temperature is 300-500 DEG C, preheating time 1
Hour；
4）Charging tray by preheating enters back into high-temperature constant warm area by guide rail, at 1100-1150 DEG C, carries out the reduction of high temperature germanium
Volatilization, when heating time is 2 small；
5）The germanium-containing smoke dust evaporated, which is entered by volatilization gas collecting pipe in cooler, to be cooled down；
6）After germanium-containing smoke dust is cooled to 200 DEG C, enter dust-precipitator, gather dust enrichment by Bag filter, obtain germanic 20% with
On high-grade germanium concentrate；
7）By step 4）Charging tray after the complete germanium of vaporization at high temperature enters cooling zone by track and cools down.
The step 2）In, the potassium borohydride of addition 7.5-10 mass parts in the low-grade germanium concentrate of every 100 mass parts.
Performance measurement of the present invention：Potassiumiodate titration measuring Ge content, first using H3PO4+ KMnO4Decompose flue dust germanium essence
Ore deposit；It adds in hydrochloric acid to be distilled, initial acidity will be strict controlled in 6mol/L；When measuring germanium amount in germanium concentrate, 100mL is used
6mol/L hydrochloric acid solutions receive distillate, and sodium hypophosphite just can be used after steaming 2/3 and carry out determination by reduction Ge content.
Compared with prior art, the present invention it has an advantageous effect in that：
（1）Germanium stove is carried using the three-stage of new design, is designed by three stage structure, optimization puies forward germanium flow, sharp to greatest extent
With the heat in stove, thermal loss is reduced, realizes energy-saving and emission-reduction, the high-efficiency resource recycling for carrying germanium；
（2）Using " argon gas+potassium borohydride+three-stage carries germanium stove " reduction volatilization germanium-extracting technology, the enrichment of germanium mining and metallurgy refining is improved
The grade of multiple and germanium concentrate solves rear process chlorination and proposes the decline of the germanium rate of recovery, and production cost is substantially increased, and generated three
It is useless：The problem of harmless treatment pressure of residual acid, residue and exhaust gas is big；
（3）The introducing of inert gas argon gas as the carrier gas of volatile ingredient, effectively solves germanium oxide dust in traditional dust collecting system
The problem of adhering to tube wall easily in cooling pipe and blocking, meanwhile, inert atmosphere is formed, completely cuts off air, prevents the CeO quilts of generation
It is oxidized to CeO2；
（4）The introducing of reducing agent potassium borohydride is solved in germanium ore deposit lignite, can not be by germanium using C in lignite itself as reducing agent
The drawbacks of being utmostly reduced into CeO volatilizations；
（5）The germanium concentrate grade of gained is high, can reach more than 20%, be conducive to the progress of the further wet underwater welding germanium technique in rear end.
Description of the drawings
Fig. 1 is extraction stove structure diagram of the present invention.
Fig. 2 is extraction stove cross-sectional structure schematic diagram of the present invention.
Fig. 3 is extraction stove end structure illustration of the present invention.
Fig. 4 is extracting method process schematic representation of the present invention.
Wherein, cooler 1, dust-precipitator 2, shell 3, furnace body 4, partition plate 5, guide rail 6, heat insulation foam 7, resistive heater 8, preheating
Area 9, high-temperature constant warm area 10, cooling zone 11, volatilization gas collecting pipe 12, air admission hole 13.
Specific embodiment
Embodiment 1：A kind of extraction stove for heat-treating volatilization and extracting germanium in low-grade germanium concentrate, including the volatilization being linked in sequence
Stove, cooler 1 and dust-precipitator 2, volatilization furnace include shell 3, furnace body 4, partition plate 5, guide rail 6, heat insulation foam 7 and resistive heater
8, shell 3 is sleeved on outside furnace body 4, and heat insulation foam 7 is filled in the gap between shell 3 and furnace body 4, and resistive heater 8 is set
On 4 outer wall of furnace body；Partition plate 5 is two pieces, is fixed on the top inner wall of furnace body 4 vertically, is three parts by 4 inside division of furnace body,
It is respectively preheating zone 9, high-temperature constant warm area 10 and cooling zone 11 from front to back；Guide rail 6 is arranged on 4 intermediate upper position of furnace body,
Its height is less than 5 minimum point of partition plate, and the charging tray equipped with low-grade lignite germanium concentrate is placed on guide rail 6, and charging tray is sliding on guide rail 6
It is dynamic.Volatilization gas collecting pipe 12 is additionally provided on cooler 1, cooler 1 is connected by volatilization gas collecting pipe 12 with furnace body 4,
The air inlet of volatilization gas collecting pipe 12 is fixed on 4 top of furnace body of high-temperature constant warm area 10.4 lower part of furnace body is additionally provided with air admission hole
13, inert gas is filled with by air admission hole 13 inside furnace body 4.
The extracting method of germanium in low-grade germanium concentrate is extracted in thermal reduction volatilization, which comprises the following steps：
1）Argon gas is filled with by air admission hole 13 inside furnace body 4, is continually fed into 30 minutes, gas flow 240-300m3/ h, makes
It obtains and is stuffed entirely with argon gas inside furnace body 4；
2）By low-grade lignite germanium concentrate and potassium borohydride, uniformly tile and be put into charging tray after mixing, every 100 mass parts it is low
The potassium borohydride of 7.5-10 mass parts is added in grade germanium concentrate, and charging tray is placed on guide rail 6, is led to from 4 inlet of furnace body
Push rod is crossed to be sent in burner hearth；
3）Charging tray push-in is placed in preheating zone 9 and is preheated, temperature is 300-500 DEG C in preheating zone 9, preheating time 1
Hour；
4）Charging tray by preheating is pushed into high-temperature constant warm area 10 by guide rail 6, at 1100-1150 DEG C, carries out high temperature reduction
Volatilize germanium, when the reduction volatilization time is 2 small；
5）The germanium-containing smoke dust that reduction volatilization comes out is cooled down by volatilization gas collecting pipe 12 into cooler 1 is interior；
6）After germanium-containing smoke dust is cooled to 200 DEG C, into bagroom 2, enrichment of gathering dust obtains germanic more than 20% Gao Pin
Position germanium concentrate；
7）By step 4）Charging tray after vaporization at high temperature is entered after cooling zone 11 cools down by track and discharged.
After adding potassium borohydride reduction agent, evaporation rate of germanium significantly improves, and when the mass ratio of addition is 8.5%, evaporation rate of germanium reaches
To the end, continue to increase additive amount, volatility almost no longer continues to add, and therefore, optimal addition mass ratio is 8.5%, experiment
Data see the table below：
。
Some common industrial reduction agent, such as coke, iron powder, reduction effect can not show a candle to potassium borohydride KBH4, and produce
Object potassium borate is alternatively arranged as other industrial uses such as disinfectant, good in economic efficiency, take into account safety and environmental protection.Experimental data is as follows：
。
Argon gas belongs to unimolecule class gas, and argon gas is relatively more stable, seldom reacts with metal class, and nitrogen be because
Especially it is not easy greatly to disconnect to be reacted for the bond energy of three key of nitrogen nitrogen, is just known as inert gas, and some metals can delay
Long response time；So argon gas is more more than nitrogen applicable surface, protective effect is also more preferable.Meanwhile the relative atomic mass of argon gas compares nitrogen
Molecule is much larger, can preferably discharge air.The contrast effect of argon gas and air is as follows：
。
Claims (5)
1. a kind of extraction stove for heat-treating volatilization and extracting germanium in low-grade germanium concentrate, it is characterised in that the extraction stove includes order and connects
The volatilization furnace that connects, cooler（1）And dust-precipitator（2）, volatilization furnace include shell（2）, furnace body（4）, partition plate（5）, guide rail（6）、
Heat insulation foam（7）And resistive heater（8）, shell（2）It is sleeved on furnace body（4）Outside, heat insulation foam（7）It is filled in shell（2）With
Furnace body（4）Between gap in, resistive heater（8）It is arranged on furnace body（4）On outer wall；Partition plate（5）For two pieces, it is fixed on vertically
Furnace body（4）Top inner wall, by furnace body（4）Inside division is three parts, from front to back respectively preheating zone（9）, high temperature constant temperature
Area（10）And cooling zone（11）；Guide rail（6）It is arranged on furnace body（4）Intermediate upper position, height are less than partition plate（5）It is minimum
Point, guide rail（6）Upper to place the charging tray equipped with low-grade lignite germanium concentrate, charging tray is in guide rail（6）Upper slip.
2. the extraction stove of germanium in low-grade germanium concentrate is extracted in thermal reduction volatilization as described in claim 1, it is characterised in that described
Cooler（1）On be additionally provided with volatilization gas collecting pipe（12）, cooler（1）Pass through volatilization gas collecting pipe（12）With furnace body
（4）Connection, volatilization gas collecting pipe（12）Air inlet be fixed on high-temperature constant warm area（10）Furnace body（4）Top.
3. the extraction stove of germanium in low-grade germanium concentrate is extracted in thermal reduction volatilization as described in claim 1, it is characterised in that described
Furnace body（4）Lower part is additionally provided with air admission hole（13）, inert gas passes through air admission hole（13）It is filled with furnace body（4）It is internal.
4. a kind of extracting method for heat-treating volatilization and extracting germanium in low-grade germanium concentrate, it is characterised in that the extracting method include with
Lower step：
1）Argon gas is passed through into air admission hole（13）It is filled with furnace body（4）Inside is continually fed into 30 minutes, gas flow 240-300m3/
H so that furnace body（4）Inside is stuffed entirely with argon gas；
2）By low-grade lignite germanium concentrate and potassium borohydride, uniformly tile and be put into charging tray after mixing, every 100 mass parts it is low
Potassium borohydride is added in grade germanium concentrate, and charging tray is placed on guide rail（6）On, from furnace body（4）Inlet is sent by push rod
Into burner hearth；
3）Charging tray push-in is placed on preheating zone（9）It is inside preheated, preheating zone（9）Interior temperature is 300-500 DEG C, during preheating
Between for 1 it is small when；
4）Pass through guide rail by the charging tray of preheating（6）It is pushed into high-temperature constant warm area（10）, at 1100-1150 DEG C, carry out high temperature
Reduction volatilization germanium, when the reduction volatilization time is 2 small；
5）The germanium-containing smoke dust that reduction volatilization comes out passes through volatilization gas collecting pipe（12）Into cooler（1）Interior cooling；
6）After germanium-containing smoke dust is cooled to 200 DEG C, into bagroom（2）, enrichment of gathering dust obtains germanic more than 20% height
Grade germanium concentrate；
7）By step 4）Charging tray after vaporization at high temperature enters cooling zone by track（11）It discharges after cooling.
5. the extracting method of germanium in low-grade germanium concentrate is extracted in thermal reduction volatilization as claimed in claim 4, it is characterised in that institute
The step 2 stated）In, the potassium borohydride of addition 7.5-10 mass parts in the low-grade germanium concentrate of every 100 mass parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810115436.3A CN108048672B (en) | 2018-02-06 | 2018-02-06 | Extraction furnace and extraction method for extracting germanium in low-grade germanium concentrate by thermal reduction and volatilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810115436.3A CN108048672B (en) | 2018-02-06 | 2018-02-06 | Extraction furnace and extraction method for extracting germanium in low-grade germanium concentrate by thermal reduction and volatilization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108048672A true CN108048672A (en) | 2018-05-18 |
| CN108048672B CN108048672B (en) | 2023-09-15 |
Family
ID=62125651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810115436.3A Active CN108048672B (en) | 2018-02-06 | 2018-02-06 | Extraction furnace and extraction method for extracting germanium in low-grade germanium concentrate by thermal reduction and volatilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108048672B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57205321A (en) * | 1981-06-06 | 1982-12-16 | Nippon Telegr & Teleph Corp <Ntt> | Separating and recovering method for germanium from glass composition containing germanium |
| CN101680054A (en) * | 2007-05-24 | 2010-03-24 | 保尔伍斯股份有限公司 | Method for the valorisation of zinc- and sulphate-rich residue |
| CN102031397A (en) * | 2010-10-25 | 2011-04-27 | 云南天浩稀贵金属股份有限公司 | Method for reducing high-purity germanium dioxide into germanium ingots continuously |
| CN104805316A (en) * | 2015-05-07 | 2015-07-29 | 云南临沧鑫圆锗业股份有限公司 | Method for extracting germanium by thermally reducing and volatilizing germanium ores |
| CN205821424U (en) * | 2016-07-25 | 2016-12-21 | 云南临沧鑫圆锗业股份有限公司 | Dry distilling germanic brown coal volatilizing and enriching extracts germanium device |
| US20170121790A1 (en) * | 2015-05-07 | 2017-05-04 | Yunnan Lincang Xinyuan Germanium Industry Co.,Ltd | Method of extracting germanium from germanium deposit using thermal reduction process |
-
2018
- 2018-02-06 CN CN201810115436.3A patent/CN108048672B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57205321A (en) * | 1981-06-06 | 1982-12-16 | Nippon Telegr & Teleph Corp <Ntt> | Separating and recovering method for germanium from glass composition containing germanium |
| CN101680054A (en) * | 2007-05-24 | 2010-03-24 | 保尔伍斯股份有限公司 | Method for the valorisation of zinc- and sulphate-rich residue |
| CN102031397A (en) * | 2010-10-25 | 2011-04-27 | 云南天浩稀贵金属股份有限公司 | Method for reducing high-purity germanium dioxide into germanium ingots continuously |
| CN104805316A (en) * | 2015-05-07 | 2015-07-29 | 云南临沧鑫圆锗业股份有限公司 | Method for extracting germanium by thermally reducing and volatilizing germanium ores |
| US20170121790A1 (en) * | 2015-05-07 | 2017-05-04 | Yunnan Lincang Xinyuan Germanium Industry Co.,Ltd | Method of extracting germanium from germanium deposit using thermal reduction process |
| CN205821424U (en) * | 2016-07-25 | 2016-12-21 | 云南临沧鑫圆锗业股份有限公司 | Dry distilling germanic brown coal volatilizing and enriching extracts germanium device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108048672B (en) | 2023-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ye et al. | One-step extraction of antimony from low-grade stibnite in Sodium Carbonate–Sodium Chloride binary molten salt | |
| CN104480328B (en) | The method of germanium in the low-grade brown coal germanium concentrate of vacuum enriching and recovering | |
| CN102643996A (en) | Method for producing lead bullion by means of copper dross side-blown smelting | |
| CN108728672B (en) | Extraction method of antimony metal | |
| CN112481487B (en) | Zinc-containing dust and sludge recycling method | |
| CN102212706A (en) | Method for extracting arsenic metal from arsenic trioxide material by two-stage carbon reduction | |
| CN108130422A (en) | A kind of method that valuable metal is extracted in steel plant's flue dust | |
| CN101492773A (en) | Process and system for recycling lead-zinc furnace cinder | |
| CN105492375A (en) | Direct-fired heating method and facility for implementing same | |
| CN102492855A (en) | Method for recovering valuable metal from solid waste material containing zinc | |
| CN107385237A (en) | The method of smelting of antimony concentrate | |
| CN103334011B (en) | Process for secondary recovery of germanium from germanium refining coal cinder and germanium refining acid sludge | |
| CN104152675A (en) | Method for preparing metallic tin and sodium silicate by utilizing high-silicon type cassiterite concentrate | |
| CN214612701U (en) | Zinc-containing dust and sludge recycling system | |
| CN108048672A (en) | The extraction stove and extracting method of germanium in low-grade germanium concentrate are extracted in thermal reduction volatilization | |
| CN109737430A (en) | A kind of hazardous waste processing system and method | |
| CN207828392U (en) | The extraction stove of germanium in low-grade germanium concentrate is extracted in thermal reduction volatilization | |
| CN211346374U (en) | Safe metallurgical heat recovery recycles device | |
| CN207130326U (en) | antimony concentrate smelting system | |
| US20170121790A1 (en) | Method of extracting germanium from germanium deposit using thermal reduction process | |
| CN104805316A (en) | Method for extracting germanium by thermally reducing and volatilizing germanium ores | |
| CN109487086A (en) | Smelting non-ferrous metal and/or ore dressing tailings resource utilization recyclable device and method | |
| CN107227412A (en) | Antimony concentrate smelting system | |
| CN209397250U (en) | A kind of smelting non-ferrous metal and/or ore dressing tailings resource utilization recyclable device | |
| CN101973521A (en) | Method for forming oxygen and hydrogen by using steam and carbon monoxide through regenerating reduction and circular gasification |
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 |