CN1063314A - Method and device for recovering cadmium by reduction distillation - Google Patents
Method and device for recovering cadmium by reduction distillation Download PDFInfo
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- CN1063314A CN1063314A CN91106609A CN91106609A CN1063314A CN 1063314 A CN1063314 A CN 1063314A CN 91106609 A CN91106609 A CN 91106609A CN 91106609 A CN91106609 A CN 91106609A CN 1063314 A CN1063314 A CN 1063314A
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- cadmium
- recovery
- negative plate
- reactor
- reductive agent
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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 negative plate of a waste nickel-insulated battery 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 negative plate two sides, 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 is 1 hour, and 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 reducer, the vacuum reduction distillation reclaims cadmium, technology is simple and direct, receipts rate height, 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 (5)
1, a kind ofly relate to method and the device thereof that reduction distillation reclaims cadmium, it is characterized in that: behind negative plate and the reductive agent batching mixing, be subjected to the influence of umbrella condenser in reactor, Cadmium oxide is formed cadmium metal and obtains recovery by abundant reduction.
2, the method for recovery cadmium according to claim 1 is characterized in that: reductive agent can be charcoal, liquefied gas, Sweet natural gas, sugar soln, and temperature of reaction is 500～1000 ℃, and the recovery time is 1～10 hour, and soaking time is 1～10 hour.Vacuum tightness is 0.5～20 pascal.
3, the method for recovery cadmium according to claim 2, it is characterized in that: when adopting wood charcoal powder to be reductive agent, with 100～200 orders, weight percentage is that 1～5% wood charcoal powder and concentration are 20～40% water glass solution 1～10%, water furnishing slurry lake, brush is put on the negative plate two sides.
4, the method for recovery cadmium according to claim 2 is characterized in that: sugar soln, its weight ratio are 1: 1～5, and the negative plate soak time is 10～50 minutes.
5, the device of recovery cadmium metal according to claim 1 is characterized in that: in the main equipment reactor, the condenser of crucible top is a umbrella, and feeds water coolant.
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 true CN1063314A (en) | 1992-08-05 |
| CN1024204C 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) |
Cited By (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 |
| CN101942564A (en) * | 2010-08-21 | 2011-01-12 | 赵志强 | Process for producing pure cadmium by continuous reduction and distillation of zinc cadmium slag and sponge cadmium |
| CN103468960A (en) * | 2013-08-23 | 2013-12-25 | 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 |
| CN104388696A (en) * | 2014-10-20 | 2015-03-04 | 河南豫光锌业有限公司 | Method for controlling appearance quality of cadmium ingot |
| CN109266868A (en) * | 2018-11-22 | 2019-01-25 | 深圳技术大学（筹） | A kind of method of cadmium in recycling 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 |
-
1991
- 1991-01-09 CN CN91106609A patent/CN1024204C/en not_active Expired - Fee Related
Cited By (10)
| 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 |
| CN101942564A (en) * | 2010-08-21 | 2011-01-12 | 赵志强 | Process for producing pure cadmium by continuous reduction and distillation of zinc cadmium slag and sponge cadmium |
| 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 |
| CN103468960A (en) * | 2013-08-23 | 2013-12-25 | 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 |
| 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 |
| CN104388696A (en) * | 2014-10-20 | 2015-03-04 | 河南豫光锌业有限公司 | Method for controlling appearance quality of cadmium ingot |
| 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 |
| CN109266868A (en) * | 2018-11-22 | 2019-01-25 | 深圳技术大学（筹） | A kind of method of cadmium in recycling 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1024204C (en) | 1994-04-13 |
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