CN102534245A - Method for manufacturing high-quality zinc powder - Google Patents
Method for manufacturing high-quality zinc powder Download PDFInfo
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- CN102534245A CN102534245A CN2011103944533A CN201110394453A CN102534245A CN 102534245 A CN102534245 A CN 102534245A CN 2011103944533 A CN2011103944533 A CN 2011103944533A CN 201110394453 A CN201110394453 A CN 201110394453A CN 102534245 A CN102534245 A CN 102534245A
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Abstract
The invention belongs to the technical field of nonferrous metallurgy chemical industry, in particular to a method for manufacturing high-quality zinc powder by crude zinc. The method comprises the following steps of: making crude zinc liquid enter a cadmium column and then enter a lead column to obtain high-purity zinc steam; directly cooling to obtain high-purity industrial zinc powder, wherein the column top of the cadmium column discharges high-cadmium zinc, and the column bottom of the cadmium column discharges lead-containing zinc liquid; making the lead zinc liquid enter the lead column, wherein the column bottom discharges high-lead zinc, and the column top discharges-high purity zinc steam; and making the zinc steam enter a condenser, and cooling to obtain the high-purity industrial zinc powder. The position of the lead column and the position of the cadmium column are mutually exchanged in the process flow, so that the energy consumption in the processes of re-melting and re-evaporation in the conventional process flow can be prevented, and the metal loss of zinc during the re-melting and re-evaporation is prevented.
Description
Technical field
The invention belongs to nonferrous metallurgy chemical engineering industry technical field, relate in particular to a kind of method of manufacture of high-quality zinc powder.
Background technology
In recent years, industrial high-purity zinc powder was a kind of important metallurgy a---industrial chemicals, was widely used in the displacement operation of zinc metallurgy and zinc salt production process, as vat powder, and the raw material of rongalite and relevant organic products etc.At present, the method for acquisition industrial high-purity zinc powder has crucible method, rectification method, spray method zinc powder method etc.Rectification method is generally more excellent, but this method will use the high-purity smart spelter of 1 grade or 0 grade chemical purity as raw material, so cost is higher.
Traditional industrial is actually two step method with the rectification method ME of high-purity zinc powder.It is initial from crude zinc liquid, with 4 grades, 5 grades crude zincs or etc. outer zinc make raw material, through plumbous tower, the rectifying of cadmium tower of distillation system, the cooling ingot bar makes the high-purity smart spelter of 1 grade or 0 grade, this be technologic one to go on foot; After more smart spelter being melted, get into the plumbous tower evaporation of rectifying gasification, cool off high-purity technical grade zinc powder of back powdering at last, this was second step.Above-mentioned known from the crude zinc piece to the high-purity zinc powder manufacturing processed: to the fusion of smart spelter, step repeatability such as evaporation gasification and cooling ingot bar are many in plumbous tower; Cause metal loss, energy dissipation, the labor force increases; And increased production cost, discharging serious three wastes contaminate environment.
Summary of the invention
To the weak point that above-mentioned prior art exists, the present invention provides a kind of method of manufacture of high-quality zinc powder, and it can shorten preparation technology, economizes on resources and the energy, effectively reduce the crude zinc raw material demand and loss, save energy and reduce the cost, reduce cost.
The object of the invention reaches through following technical measures: a kind of method of manufacture of high-quality zinc powder is characterized in that: crude zinc is configured to crude zinc liquid, and crude zinc liquid gets into plumbous tower after getting into the cadmium tower again, and the zinc liquid that will go out plumbous tower cools off, and obtains zinc powder.
The method of manufacture of above-mentioned high-quality zinc powder, said crude zinc liquid get into cadmium tower middle part, and the bottom liquid behind the cadmium column distillation gets into plumbous tower middle part, and zinc fume gets into the water cooler cooling through the top of plumbous column distillation, obtains zinc powder.
The method of manufacture of above-mentioned high-quality zinc powder, the distillation temperature of said cadmium tower are 1050 ℃-1120 ℃.
The method of manufacture of above-mentioned high-quality zinc powder, the distillation temperature of said plumbous tower are 1050 ℃-1120 ℃.
The method of manufacture of above-mentioned high-quality zinc powder, the temperature that said crude zinc liquid gets into the cadmium tower is 900-1000 ℃.
The method of manufacture of above-mentioned high-quality zinc powder, said crude zinc liquid can pass through preheating earlier, and preheating temperature is preferably 600-800 ℃
Based on These characteristics, the present invention compares prior art has following advantage:
1, the method for manufacture of the high-quality zinc powder of the present invention has been optimized Production Flow Chart, when obtaining industrial high-purity zinc powder, has saved the labor force, reduces the discharging of a large amount of greenhouse gases.Because plumbous tower and cadmium tower exchange the position on stream each other, thereby energy consumption and the zinc that can save fusion again in the former flow process, repeated evaporation process are at remelting, metal loss when heavily steaming.
2, the method for manufacture of the high-quality zinc powder of the present invention is saved the loss of mass energy and minimizing zinc raw material, and the finished product chemical element index of acquisition reaches the quality of 0 grade of 1 grade of spelter.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment the present invention is done further explain, following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
As shown in Figure 1, industrial crude zinc is mixed with crude zinc liquid at present, crude zinc liquid is put into distillation system, crude zinc liquid is introduced into cadmium tower middle part, and through distillation, the cadmium Tata ejects high cadmium zinc, and tower bottom flow goes out leaded zinc liquid; Collect the leaded zinc liquid of cadmium tower bottom, leaded zinc liquid is sent into plumbous tower middle part, through distillation, plumbous Tata underflow goes out high plumbous zinc, i.e. B level zinc, and plumbous Tata ejects high purity zinc steam; Zinc fume is sent into condensing surface, and cooling obtains high-quality zinc powder.Each unit tower technic index and control and traditional rectification process are identical in this technology.
Further, in the above-mentioned still-process, the distillation temperature of said cadmium tower and plumbous tower is preferably 1050 ℃-1120 ℃.Cadmium and zinc can fierceness be evaporated in still-process, and remove other metallic impurity effectively, make the quality of the zinc powder that obtains after the cooling better.
Further, in the above-mentioned still-process, the temperature that gets into distillatory crude zinc liquid is preferably 900-1000 ℃, makes the zinc content in the distillatory crude zinc liquid higher, and does not influence distillation and make the distilling effect of metallic impurity, improves the purity of the zinc of the zinc powder that obtains at last.
Further, crude zinc liquid can be heated 600-800 ℃ earlier through a pre-heating step, and the heats after making it is better, and the content of zinc is higher.
Embodiment 1: by the cadmium tower that one 33 990 * 457 specification tower trays are formed, the plumbous tower that the tower tray of two 55 600 * 300 specifications is formed is combined into the device of the laggard plumbous tower of the advanced cadmium tower of above-mentioned crude zinc; Add supporting water cooler, drop into the crude zinc composition: lead 0.14%, iron 0.3%, cadmium 0.018% (being equivalent to 4～5 grades of zinc), through above-mentioned rectification process of the present invention; Wherein, the temperature of crude zinc liquid is 900 ℃, and the temperature of cadmium tower is 1050 ℃; The temperature of plumbous tower is 1050 ℃, and after cooling off, the finished product zinc powder composition of acquisition is 0.0003%, iron 0.003%, cadmium 0.0005% (being equivalent to 0 grade of zinc); The yield 92.24% of metallic zinc, 1.26 tons of coal consumptions.
Embodiment 2: by the cadmium tower that one 33 990 * 457 specification tower trays are formed, the plumbous tower that the tower tray of two 55 600 * 300 specifications is formed is combined into the device of the laggard plumbous tower of the advanced cadmium tower of above-mentioned crude zinc; Add supporting water cooler, drop into the crude zinc composition: lead 0.21%, iron 0.5%, cadmium 0.020% (being equivalent to 4～5 grades of zinc), through above-mentioned rectification process of the present invention; Wherein, the temperature of crude zinc liquid is 950 ℃, and the temperature of cadmium tower is 1100 ℃; The temperature of plumbous tower is 1120 ℃, and after cooling off, the finished product zinc powder composition of acquisition is 0.00029%, iron 0.003%, cadmium 0.0005% (being equivalent to 0 grade of zinc); The yield 91.73% of metallic zinc, 1.41 tons of coal consumptions.
Embodiment 3: by the cadmium tower that one 33 990 * 457 specification tower trays are formed, the plumbous tower that the tower tray of two 55 600 * 300 specifications is formed is combined into the device of the laggard plumbous tower of the advanced cadmium tower of above-mentioned crude zinc; Add supporting water cooler, drop into the crude zinc composition: lead 0.16%, iron 0.4%, cadmium 0.025% (being equivalent to 4～5 grades of zinc), through above-mentioned rectification process of the present invention; Wherein, the temperature of crude zinc liquid is 1000 ℃, and the temperature of cadmium tower is 1120 ℃; The temperature of plumbous tower is 1110 ℃, and after cooling off, the finished product zinc powder composition of acquisition is 0.00032%, iron 0.003%, cadmium 0.0005% (being equivalent to 0 grade of zinc); The yield 94.17% of metallic zinc, 1.55 tons of coal consumptions.
Traditional technology is two step system zinc methods.It is the first step that crude zinc rectifying makes smart spelter, and the metal yield is about 95%, and making high-purity zinc powder with smart spelter was second step, and its metal yield is about 93%, and two steps were multiplied each other the metallic zinc yield only about 88.35%.The coal consumption of one ton of metallic zinc of every production: 1.2 tons of the first steps, in 0.9～1.1 ton of second step, the coal consumption that two steps added up to one ton of metallic zinc is 2.1～2.3 tons.And according to the technology that the present invention proposes, and the metallic zinc yield is 91～93%, the coal consumption of one ton of metallic zinc of every production is 1.2～2.3 tons.Two compare, and technology of the present invention improves 3～5% than traditional technology metallic zinc yield, and coal consumption reduces 0.9～1 ton, thereby have reduced manufacturing cost.Its total zinc purity of finished product that adopts this technology to make can be up to 99%.
Claims (6)
1. the method for manufacture of a high-quality zinc powder is characterized in that: crude zinc is configured to crude zinc liquid, and crude zinc liquid gets into plumbous tower after getting into the cadmium tower again, and the zinc liquid that will go out plumbous tower cools off, and obtains zinc powder.
2. the method for manufacture of high-quality zinc powder according to claim 1 is characterized in that: said crude zinc liquid gets into cadmium tower middle part, and the bottom liquid behind the cadmium column distillation gets into plumbous tower middle part, and zinc fume gets into the water cooler cooling through the top of plumbous column distillation, obtains zinc powder.
3. the method for manufacture of high-quality zinc powder according to claim 1 and 2, it is characterized in that: the distillation temperature of said cadmium tower is 1050 ℃-1120 ℃.
4. the method for manufacture of high-quality zinc powder according to claim 1 and 2, it is characterized in that: the distillation temperature of said plumbous tower is 1050 ℃-1120 ℃.
5. the method for manufacture of high-quality zinc powder according to claim 1 and 2 is characterized in that: the temperature that said crude zinc liquid gets into the cadmium tower is 900-1000 ℃.
6. the method for manufacture of high-quality zinc powder according to claim 5 is characterized in that: through preheating, preheating temperature is 600-800 ℃ to said crude zinc liquid earlier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103944533A CN102534245A (en) | 2011-12-02 | 2011-12-02 | Method for manufacturing high-quality zinc powder |
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| CN2011103944533A CN102534245A (en) | 2011-12-02 | 2011-12-02 | Method for manufacturing high-quality zinc powder |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1260256A (en) * | 1999-11-26 | 2000-07-19 | 昆明市旭峰锌业有限公司 | One-step manufacture method for industrial high-purity zinc powder |
| WO2010016020A2 (en) * | 2008-08-07 | 2010-02-11 | Zinchem, A Division Of Zimco Group (Pty) Ltd | Production of zinc dust |
| CN102000829A (en) * | 2010-10-25 | 2011-04-06 | 云南天浩稀贵金属股份有限公司 | Method for smelting metal zinc powder from zinc calcine by using electric furnace |
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- 2011-12-02 CN CN2011103944533A patent/CN102534245A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1260256A (en) * | 1999-11-26 | 2000-07-19 | 昆明市旭峰锌业有限公司 | One-step manufacture method for industrial high-purity zinc powder |
| WO2010016020A2 (en) * | 2008-08-07 | 2010-02-11 | Zinchem, A Division Of Zimco Group (Pty) Ltd | Production of zinc dust |
| CN102000829A (en) * | 2010-10-25 | 2011-04-06 | 云南天浩稀贵金属股份有限公司 | Method for smelting metal zinc powder from zinc calcine by using electric furnace |
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Application publication date: 20120704 |