CN1024204C - Method and device for recovering cadmium by reduction distillation - Google Patents
Method and device for recovering cadmium by reduction distillation Download PDFInfo
- Publication number
- CN1024204C CN1024204C CN91106609A CN91106609A CN1024204C CN 1024204 C CN1024204 C CN 1024204C CN 91106609 A CN91106609 A CN 91106609A CN 91106609 A CN91106609 A CN 91106609A CN 1024204 C CN1024204 C CN 1024204C
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- cadmium
- reductive agent
- reactor
- recovery
- negative plate
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- 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
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Abstract
The invention relates to a method for recycling cadmium by adding a reducing agent into a waste nickel-cadmium battery cathode plate and using vacuum distillation, which is characterized by comprising the following steps: the negative plate is mixed with reducing agent, and then placed into a reactor to be indirectly heated, selectively reduced and distilled, and the cadmium vapor is condensed into pure cadmium on the upper part of the reactor. The method has the advantages of simple process, no pollution and good benefit, the distillation is carried out for 1-10 hours under the conditions that the temperature is 500-1000 ℃ and the vacuum degree is 10-100 pascals, the purity of cadmium reaches 99.97%, the recovery rate reaches 99.9%, and the residue from the distillation can be returned to an iron and steel plant.
Description
What the present invention relates to is method and the device thereof that a kind of reduction distillation reclaims cadmium.
About from the waste Ni-Cd battery negative plate, reclaiming the method for cadmium, do not see reported in literature as yet, but with businessman from Hongkong's contacts in recognize and handle this waste material: shred negative plate with shears earlier, then fragment is rolled in ball mill, sheet is separated with powder, take out the cadmium powder and leach, purify and electrodeposition.This method needs fine dust prevention and Sewage treatment systems, otherwise environmental pollution is big in the whole process of production.Many for this reason countries ban use of.China uses nickel-cadmium cell less, does not form certain recovery production technique as yet.
The objective of the invention is with a kind of simple, nonpolluting method is directly handled the waste Ni-Cd battery negative plate and is reclaimed cadmium.
Technical scheme of the present invention mainly is: behind waste Ni-Cd battery negative plate and reductive agent batching mixing, and reduction volatilization in the main equipment reactor.There is a special umbrella condenser reactor crucible top, makes the Cadmium oxide in the negative plate can in time be subjected to cooling formation cadmium metal by the cadmium vapor that fully reduces and produce.
In the technique scheme, the reductive agent of employing can be wood charcoal powder, liquefied gas, Sweet natural gas, sugar soln.They separately mix proportion scheme be:
1. the employing wood charcoal powder is the reductive agent scheme: with 100～200 purpose wood charcoal powder weight percentage is 1～5%, concentration is 20～40% water glass solution 1～10%, after being water furnishing paste with surplus, on the two sides of negative plate, put into the reactor reduction volatilization then with the hairbrush brush;
2. the employing sugar soln is the reductive agent scheme: the weight ratio of sugar and water is 1: 1～5, and the negative plate soak time is 10～50 minutes.
In the technique scheme, temperature of reaction is 500～1000 ℃, and the recovery time is 1～10 hour.Soaking time 1～10 hour, vacuum tightness is 0.5～20 pascal.
Device synoptic diagram of the present invention as shown in drawings.Its drawing label is represented: 1-vacuum pump, 2-snubber, 3-electric furnace, 4-reactor, 5-crucible, 6-condenser, 7-pressure warning unit.
Embodiment one: allocating portion-160 purpose wood charcoal powder into concentration is 2 parts of 30% water glass solutions, the furnishing slurry, crucible on the two sides of the negative plate of 180 grams, after waiting to do, is put into the hairbrush brush in the back, behind the reactor to be sealed, be evacuated to 0.5～20 pascal, temperature of reaction is 750 ℃, and the recovery time is 7 hours, soaking time 1 hour, the yield that reclaims cadmium metal is 99.69%;
Embodiment two: the employing sugar soln is a reductive agent.Pole piece 152 grams are put into 1: 1 soaked 15 minutes in the liquid glucose, put into the reactor reduction volatilization after waiting to do.Temperature of reaction is that 750 ℃ of recovery times are 7 hours, and soaking time is 1 hour, and the yield that reclaims cadmium metal is 99.99%.
Advantage of the present invention is:
The present invention system adopts the waste Ni-Cd battery negative plate and replenishes solid, gas or liquid reducing agent, cadmium is reclaimed in the vacuum reduction distillation, technology is simple and direct, yield is high, good product purity, process does not have waste water and gas, leftover can return steel plant, environmentally safe, working condition is good, cost is low, good in economic efficiency.
Claims (4)
1, a kind of method that relates to reduction distillation recovery cadmium is characterized in that: after containing cadmium cathode sheet and reductive agent batching mixing, Cadmium oxide fully is reduced into cadmium metal and obtains reclaiming in reactor; 500～1000 ℃ of recovery times of temperature of reaction are 1～10 hour, and soaking time is that 1～10 hour vacuum tightness is 0.5～650 handkerchief, and reductive agent can be charcoal, liquefied petroleum gas (LPG) and sucrose solution.
2, the method for recovery cadmium according to claim 1, it is characterized in that: when adopting wood charcoal powder to be reductive agent, with 100～200 order weight percentage is that 1～5% wood charcoal powder and concentration are 20～40% water glass solution 1～10% water furnishing paste, and brush is on the negative plate two sides.
3, the method for recovery cadmium according to claim 1 is characterized in that: when being reductive agent with the sucrose solution, the weight ratio of sucrose and water is 1: 1～5, then negative plate is immersed wherein 10～50 minutes.
4, the used device of a kind of claim 1 method is characterized in that: in the main equipment reactor, the condenser (6) of crucible (5) top is to be made of two symmetrical metal umbrella.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91106609A CN1024204C (en) | 1991-01-09 | 1991-01-09 | Method and device for recovering cadmium by reduction distillation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91106609A CN1024204C (en) | 1991-01-09 | 1991-01-09 | Method and device for recovering cadmium by reduction distillation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1063314A CN1063314A (en) | 1992-08-05 |
| CN1024204C true CN1024204C (en) | 1994-04-13 |
Family
ID=4908002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91106609A Expired - Fee Related CN1024204C (en) | 1991-01-09 | 1991-01-09 | Method and device for recovering cadmium by reduction distillation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024204C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191158B (en) * | 2006-11-21 | 2010-06-23 | 比亚迪股份有限公司 | Method for reclaiming metal cadmium from cadmium-containing waste material |
| CN101942564B (en) * | 2010-08-21 | 2013-09-25 | 赵志强 | Process for producing pure cadmium by continuous reduction and distillation of zinc cadmium slag and sponge cadmium |
| CN103468960B (en) * | 2013-08-23 | 2015-05-06 | 佛山市诺傲再生资源科技有限公司 | Process equipment for dedusted zinc ash and process method thereof |
| CN104388696B (en) * | 2014-10-20 | 2016-05-04 | 河南豫光锌业有限公司 | The method of cadmium ingot presentation quality control |
| CN109266868B (en) * | 2018-11-22 | 2020-12-01 | 深圳技术大学 | Method for recovering cadmium in cadmium sulfide |
| CN110016574A (en) * | 2019-03-18 | 2019-07-16 | 昆明理工大学 | Simple substance cadmium efficient recycling method and system in a kind of high temperature flue gas containing cadmium |
| CN112228185A (en) * | 2020-10-16 | 2021-01-15 | 中国船舶科学研究中心 | Ventilating oil-water condensing device for crankcase of marine medium-high speed diesel engine |
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1991
- 1991-01-09 CN CN91106609A patent/CN1024204C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1063314A (en) | 1992-08-05 |
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