CN104388696A - Method for controlling appearance quality of cadmium ingot - Google Patents
Method for controlling appearance quality of cadmium ingot Download PDFInfo
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- CN104388696A CN104388696A CN201410556382.6A CN201410556382A CN104388696A CN 104388696 A CN104388696 A CN 104388696A CN 201410556382 A CN201410556382 A CN 201410556382A CN 104388696 A CN104388696 A CN 104388696A
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- cadmium
- ingot
- cadmium ingot
- appearance quality
- service sink
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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 cadmium smelting process, particularly to a method for controlling the appearance quality of a cadmium ingot. The method for controlling the appearance quality of the cadmium ingot comprises the following steps: putting crude cadmium into a crude cadmium melting furnace for melting, injecting the cadmium solution after melting into a vacuum distillation column for distilling, condensing the cadmium steam after distilling in a condenser, then putting the condensed cadmium solution in a holding furnace to preserve heat, and at the same time adding a reduction log into the condensed cadmium solution to eliminate cadmium oxide impurities in the cadmium solution; processing molds, wherein the molds are heated to a temperature of 80-110 DEG C before each casting, the bottom part of each mold is evenly coated with hydraulic oil, and then the cadmium solution stored in the holding furnace is poured into the processed molds; putting the cooled and demolded cadmium ingot into a first-level cleaning pool for cleaning, fishing the cadmium ingot out of the first-level cleaning pool and putting the cadmium ingot into a second-level cleaning pool for cleaning, and then putting the cadmium ingot into a third-level cleaning pool for cleaning; wiping off the water and other dirt on the surface of the cleaned cadmium ingot with a cleaning cloth and drying the cadmium ingot with a draught fan. After all the steps, the cadmium ingot surface is bright and has no stains, no spots and no shrinking pits, thereby meeting the requirement for appearance quality.
Description
Technical field
The present invention relates to the smelting technology of cadmium, particularly relate to a kind of method of cadmium ingot appearance quality trait.
Background technology
Thick cadmium adopts artificial blanking when producing pure cadmium, adds and go back log stirring reduction in melting process, artificial monolithic casting during casting, the then demoulding, cleaning.There is temperature fluctuation in die casting process in this process large, about 200 degree at the end of from the 20-35 degree of room temperature to casting, do not clear up when mould is reused and do not safeguard; In cleaning process, scavenging solution PH controls unbalanced, and scavenging solution is not changed in time; Cadmium ingot after cleaning dries naturally; Very easily cause the difficult demoulding, the crystallization of pure cadmium ingot upper surface is poor, and defect ware is many, and the macroscopic irregularity such as black mole, pockmark, slag inclusion, shrinkage cavity very easily appears in pure cadmium ingot surface simultaneously.
Summary of the invention
The object of the invention is to overcome in prior art the deficiency causing cadmium ingot outward appearance to have slag inclusion, contracting hole, stain, blackspot, and a kind of method can guaranteeing the quality control that the smooth free from smutting during of cadmium ingot shiny appearance is cheated without contracting without blackspot line is provided.
For solving the problems of the technologies described above, the invention provides a kind of method of cadmium ingot appearance quality trait, comprising the following steps:
A thick cadmium is added thick cadmium smelting furnace and melts by (), then the cadmium liquid input vacuum tower after fusing is distilled, the cadmium steam formed enters holding furnace insulation after condenser condenses, temperature in holding furnace is set as that 460-500 spend, add simultaneously and go back log reduction, the Cadmium oxide impurity in removing cadmium liquid;
B mould processes by (), before each casting, and heating mould, make its temperature be 80-110 degree, then every block mold bottom uniform application hydraulic efficiency oil, is then cast to the cadmium liquid be stored in step (a) in holding furnace in the mould carrying out processing;
C cadmium ingot after cooling and demolding is first put into one-level service sink and is cleaned by (), pulled out by cadmium ingot subsequently to put into secondary service sink and clean, and finally cadmium ingot is put into three grades of service sinks and cleans;
D cadmium ingot dry wipe after washing is wiped moisture content and other dirts on surface by (), install blower fan additional and dry up cadmium ingot.
In step (a), the temperature of thick cadmium smelting furnace is set as that 300-500 spend, and the temperature in vacuum tower is set as that 500-600 spend.
Going back log described in step (a) is pine bar, and 1 ton of thick cadmium uses face area to be that the pine bar of 5 × 6cm amounts to 58 meters.
In step (b), the usage quantity of hydraulic efficiency oil is every 115 ~ 120cm
2smear 3ml ~ 5ml.
In step (c), the main component of one-level service sink and secondary service sink is hydrochloric acid, in one-level service sink, scavenging solution PH controls 1.0-1.5, in secondary service sink, scavenging solution PH controls 2.0-2.5, in three grades of service sinks, scavenging solution is clear water, and one-level, secondary, often clean 200-400KG cadmium ingot in three grades of service sinks and change a scavenging solution, during each cleaning, the residence time is all no more than 3s.
Beneficial effect of the present invention is:
(1) add in cadmium liquid in the present invention and go back log and reduce, the Cadmium oxide impurity in removing cadmium liquid, guarantees that the impurity in cadmium liquid is thoroughly removed, cadmium ingot except upper surface, other five without contracting hole without slag inclusion.
(2) when casting in the present invention, die temperature controls at 80-110 degree, and before each casting, every block mould all smears gear oil or hydraulic efficiency oil, ensures that cadmium ingot surface is without contracting hole.
(3) cadmium ingot in the present invention after the demoulding passes through the cleaning of the three grades of wash pools having pH value to require, the object of I and II service sink cleaning cadmium ingot is the sodium hydroxide washing away cadmium ingot remained on surface, the object of three grades of service sink cleaning cadmium ingots is the hydrochloric acid and the sodium-chlor that wash away cadmium ingot remained on surface, reaches the appearance requirement of the smooth free from smutting during of cadmium ingot surface-brightening without blackspot.
(4) the cadmium ingot dry wipe in the present invention after cleaning wipes moisture content and other dirt on surface; Install blower fan additional and dry up cadmium ingot, ensure that the front cadmium ingot of vanning is dry, clean, surface-brightening.
Embodiment
embodiment 1: the method for cadmium ingot appearance quality trait comprises the following steps:
A 1 ton of thick cadmium is added thick cadmium smelting furnace and melts by (), in thick cadmium, impurities is mainly Cadmium oxide, smelting furnace temperature is set as that 300-500 spend, then by the cadmium liquid input vacuum tower after fusing, vacuum tower temperature controls at 500-600 degree, the cadmium steam formed enters holding furnace insulation after condensing tube condensation, for subsequent use, holding furnace temperature controls at 460-500 degree, add that face area is 5 × 6cm simultaneously, length is 50cm goes back the reduction of 116 sections, log, the Cadmium oxide impurity in removing cadmium liquid; Guarantee that the impurity in cadmium liquid is thoroughly removed, cadmium ingot, except upper surface, is cheated without slag inclusion without contracting for other five.
B mould processes by (), before each casting, and heating mould, its temperature is made to be 80-110 degree, then every block mold bottom uniform application hydraulic efficiency oil, is then cast to the cadmium liquid be stored in step (a) in holding furnace in the mould carrying out processing, and ensures that cadmium ingot surface is without contracting hole; If process die temperature is less than 80 degree, there is contracting hole on the cadmium ingot surface of making; If process die temperature is greater than 100 degree, the cadmium ingot appearance of making is rough; Process die temperature is 80-110 when spending, and makes cadmium ingot smooth surface without contracting hole.
C cadmium ingot after cooling and demolding is first put into one-level service sink and is cleaned by (), the main component of one-level service sink and secondary service sink is hydrochloric acid, and one-level service sink pH value is 1.0, and soak time is no more than 3s; Pulled out by cadmium ingot subsequently and put into secondary service sink and clean, PH is 2.0, and soak time is no more than 3s; Finally cadmium ingot is put into three grades of service sinks to clean, in three grades of service sinks, scavenging solution is clear water, and soak time is no more than 3s, and one-level, secondary, three grades of service sinks often clean 200KG cadmium ingot and change a scavenging solution; The object of I and II service sink cleaning cadmium ingot is the sodium hydroxide washing away cadmium ingot remained on surface, and the object of three grades of service sink cleaning cadmium ingots is the hydrochloric acid and the sodium-chlor that wash away cadmium ingot remained on surface; Ensure that cadmium ingot surface is without blackspot, without slag inclusion.
D cadmium ingot dry wipe after washing is wiped moisture content and other dirts on surface by (), install blower fan additional and dry up ingot, to ensure before vanning that cadmium ingot is dry, clean, surface-brightening.
The present invention adopts the technique of first carrying out the pH value control melting, cast and carry out after die temperature control three grades of service sinks, on the production process control by stages step by step affecting cadmium ingot outward appearance, reach the smooth free from smutting during of cadmium ingot surface-brightening without the appearance requirement of blackspot without contracting hole.
Cadmium ingot after washing first is wiped moisture content and other dirt on surface with dry wipe, after install the method that blower fan dries up cadmium ingot surface additional, to ensure before vanning that cadmium ingot is dry, clean, surface-brightening.
Embodiment 2: the method for cadmium ingot appearance quality trait comprises the following steps:
A 2 tons of thick cadmiums are added thick cadmium smelting furnace and melt by (), in thick cadmium, impurities is mainly Cadmium oxide, smelting furnace temperature is set as that 300-500 spend, then by the cadmium liquid input vacuum tower after fusing, vacuum tower temperature controls at 500-600 degree, the cadmium steam formed enters holding furnace insulation after condensing tube condensation, for subsequent use, holding furnace temperature controls at 460-500 degree, add that face area is 5 × 6cm simultaneously, length is 50cm goes back the reduction of 232 sections, log, the Cadmium oxide impurity in removing cadmium liquid; Guarantee that the impurity in cadmium liquid is thoroughly removed, cadmium ingot, except upper surface, is cheated without slag inclusion without contracting for other five.
B mould processes by (), before each casting, and heating mould, its temperature is made to be 80-110 degree, then every block mold bottom uniform application hydraulic efficiency oil, is then cast to the cadmium liquid be stored in step (a) in holding furnace in the mould carrying out processing, and ensures that cadmium ingot surface is without contracting hole; If process die temperature is less than 80 degree, making cadmium ingot surface has contracting hole; If process die temperature is greater than 100 degree, the cadmium ingot appearance of making is rough; Process die temperature is 80-110 when spending, and makes cadmium ingot smooth surface without contracting hole.
C cadmium ingot after cooling and demolding is first put into one-level service sink and is cleaned by (), the main component of one-level service sink and secondary service sink is hydrochloric acid, and one-level service sink pH value is 1.2, and soak time is no more than 3s; Pulled out by cadmium ingot subsequently and put into secondary service sink and clean, PH is 2.3, and soak time is no more than 3s; Finally cadmium ingot is put into three grades of service sinks to clean, in three grades of service sinks, scavenging solution is clear water, and soak time is no more than 3s, and one-level, secondary, three grades of service sinks often clean 300KG cadmium ingot and change a scavenging solution; The object of I and II service sink cleaning cadmium ingot is the sodium hydroxide washing away cadmium ingot remained on surface, and the object of three grades of service sink cleaning cadmium ingots is the hydrochloric acid and the sodium-chlor that wash away cadmium ingot remained on surface; Ensure that cadmium ingot surface is without blackspot, without slag inclusion.
D cadmium ingot dry wipe after washing is wiped moisture content and other dirts on surface by (), install blower fan additional and dry up ingot, to ensure before vanning that cadmium ingot is dry, clean, surface-brightening.
The present invention adopts the technique of first carrying out the pH value control melting, cast and carry out after die temperature control three grades of service sinks, on the production process control by stages step by step affecting cadmium ingot outward appearance, reach the smooth free from smutting during of cadmium ingot surface-brightening without the appearance requirement of blackspot without contracting hole.
Cadmium ingot after washing first is wiped moisture content and other dirt on surface with dry wipe, after install the method that blower fan dries up cadmium ingot surface additional, to ensure before vanning that cadmium ingot is dry, clean, surface-brightening.
Embodiment 3: the method for cadmium ingot appearance quality trait comprises the following steps:
A 3 tons of thick cadmiums are added thick cadmium smelting furnace and melt by (), in thick cadmium, impurities is mainly Cadmium oxide, smelting furnace temperature is set as that 300-500 spend, then by the cadmium liquid input vacuum tower after fusing, vacuum tower temperature controls at 500-600 degree, the cadmium steam formed enters holding furnace insulation after condensing tube condensation, for subsequent use, holding furnace temperature controls at 460-500 degree, add that face area is 5 × 6cm simultaneously, length is 50cm goes back the reduction of 348 sections, log, the Cadmium oxide impurity in removing cadmium liquid; Guarantee that the impurity in cadmium liquid is thoroughly removed, cadmium ingot, except upper surface, is cheated without slag inclusion without contracting for other five.
B mould processes by (), before each casting, and heating mould, its temperature is made to be 80-110 degree, then every block mold bottom uniform application hydraulic efficiency oil, is then cast to the cadmium liquid be stored in step (a) in holding furnace in the mould carrying out processing, and ensures that cadmium ingot surface is without contracting hole; If process die temperature is less than 80 degree, making cadmium ingot surface has contracting hole; If process die temperature is greater than 100 degree, the cadmium ingot appearance of making is rough; Process die temperature is 80-110 when spending, and makes cadmium ingot smooth surface without contracting hole.
C cadmium ingot after cooling and demolding is first put into one-level service sink and is cleaned by (), the main component of one-level service sink and secondary service sink is hydrochloric acid, and one-level service sink pH value is 1.5, and soak time is no more than 3s; Pulled out by cadmium ingot subsequently and put into secondary service sink and clean, PH is 2.5, and soak time is no more than 3s; Finally cadmium ingot is put into three grades of service sinks to clean, in three grades of service sinks, scavenging solution is clear water, and soak time is no more than 3s, and one-level, secondary, three grades of service sinks often clean 400KG cadmium ingot and change a scavenging solution; The object of I and II service sink cleaning cadmium ingot is the sodium hydroxide washing away cadmium ingot remained on surface, and the object of three grades of service sink cleaning cadmium ingots is the hydrochloric acid and the sodium-chlor that wash away cadmium ingot remained on surface; Ensure that cadmium ingot surface is without blackspot, without slag inclusion.
D cadmium ingot dry wipe after washing is wiped moisture content and other dirts on surface by (), install blower fan additional and dry up ingot, to ensure before vanning that cadmium ingot is dry, clean, surface-brightening.
The present invention adopts the technique of first carrying out the pH value control melting, cast and carry out after die temperature control three grades of service sinks, on the production process control by stages step by step affecting cadmium ingot outward appearance, reach the smooth free from smutting during of cadmium ingot surface-brightening without the appearance requirement of blackspot without contracting hole.
Cadmium ingot after washing first is wiped moisture content and other dirt on surface with dry wipe, after install the method that blower fan dries up cadmium ingot surface additional, to ensure before vanning that cadmium ingot is dry, clean, surface-brightening.
Claims (5)
1. a method for cadmium ingot appearance quality trait, is characterized in that: comprise the following steps:
A thick cadmium is added thick cadmium smelting furnace and melts by (), then the cadmium liquid input vacuum tower after fusing is distilled, the cadmium steam formed enters holding furnace insulation after condenser condenses, temperature in holding furnace is set as that 460-500 spend, add simultaneously and go back log reduction, the Cadmium oxide impurity in removing cadmium liquid;
B mould processes by (), before each casting, and heating mould, make its temperature be 80-110 degree, then every block mold bottom uniform application hydraulic efficiency oil, is then cast to the cadmium liquid be stored in step (a) in holding furnace in the mould carrying out processing;
C cadmium ingot after cooling and demolding is first put into one-level service sink and is cleaned by (), pulled out by cadmium ingot subsequently to put into secondary service sink and clean, and finally cadmium ingot is put into three grades of service sinks and cleans;
D cadmium ingot dry wipe after washing is wiped moisture content and other dirts on surface by (), install blower fan additional and dry up cadmium ingot.
2. the method for cadmium ingot appearance quality trait according to claim 1, is characterized in that: in step (a), the temperature of thick cadmium smelting furnace is set as that 300-500 spend, and the temperature in vacuum tower is set as that 500-600 spend.
3. the method for cadmium ingot appearance quality trait according to claim 1, is characterized in that: going back log described in step (a) is pine bar, and 1 ton of thick cadmium uses face area to be that the pine bar of 5 × 6cm amounts to 58 meters.
4. the method for cadmium ingot appearance quality trait according to claim 1, is characterized in that: in step (b), the usage quantity of hydraulic efficiency oil is every 115 ~ 120cm
2smear 3ml ~ 5ml.
5. the method for cadmium ingot appearance quality trait according to claim 1, it is characterized in that: in step (c), the main component of one-level service sink and secondary service sink is hydrochloric acid, in one-level service sink, scavenging solution PH controls 1.0-1.5, in secondary service sink, scavenging solution PH controls 2.0-2.5, in three grades of service sinks, scavenging solution is clear water, and one-level, secondary, often clean 200-400KG cadmium ingot in three grades of service sinks and change a scavenging solution, when cleaning, the residence time is all no more than 3s at every turn.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410556382.6A CN104388696B (en) | 2014-10-20 | 2014-10-20 | The method of cadmium ingot presentation quality control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410556382.6A CN104388696B (en) | 2014-10-20 | 2014-10-20 | The method of cadmium ingot presentation quality control |
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| CN104388696A true CN104388696A (en) | 2015-03-04 |
| CN104388696B CN104388696B (en) | 2016-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112458471A (en) * | 2020-10-23 | 2021-03-09 | 武汉拓材科技有限公司 | Cleaning device and method for ultra-high-purity cadmium rod |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063314A (en) * | 1991-01-09 | 1992-08-05 | 冶金工业部长沙矿冶研究院 | Method and device for recovering cadmium by reduction distillation |
| JP2012219279A (en) * | 2011-04-04 | 2012-11-12 | Eco Fields:Kk | Method and device for separating and recovering cadmium |
| CN103924095A (en) * | 2014-04-28 | 2014-07-16 | 北京矿冶研究总院 | Novel method for recovering cadmium from copper-cadmium slag |
-
2014
- 2014-10-20 CN CN201410556382.6A patent/CN104388696B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063314A (en) * | 1991-01-09 | 1992-08-05 | 冶金工业部长沙矿冶研究院 | Method and device for recovering cadmium by reduction distillation |
| JP2012219279A (en) * | 2011-04-04 | 2012-11-12 | Eco Fields:Kk | Method and device for separating and recovering cadmium |
| CN103924095A (en) * | 2014-04-28 | 2014-07-16 | 北京矿冶研究总院 | Novel method for recovering cadmium from copper-cadmium slag |
Non-Patent Citations (1)
| Title |
|---|
| 秦永宏，冶玉花: "粗镉真空蒸馏制取优质镉的工业试验", 《中国有色冶金》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112458471A (en) * | 2020-10-23 | 2021-03-09 | 武汉拓材科技有限公司 | Cleaning device and method for ultra-high-purity cadmium rod |
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