CN103831441A - Method for preparing high-fineness zinc powder - Google Patents
Method for preparing high-fineness zinc powder Download PDFInfo
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- CN103831441A CN103831441A CN201210497002.7A CN201210497002A CN103831441A CN 103831441 A CN103831441 A CN 103831441A CN 201210497002 A CN201210497002 A CN 201210497002A CN 103831441 A CN103831441 A CN 103831441A
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Abstract
The invention discloses a method for preparing high-fineness zinc powder. The method includes the steps of melting, multi-stage liquating, cadmium eliminating, lead removing, evaporating, condensing, surface modification and the like. Oxidation resistance and dispersibility of the obtained zinc powder are improved after two times of surface processing. An antioxidant which is used is either hydroquinone or butylated hydroxyanisole. A dispersion enhancer is one of ethyl acetate, polyethylene glycol or polyvinyl alcohol. A melting furnace and a multi-stage liquating furnace form a U-shaped communicating vessel through an electric heating heat-preserving flowing tube, so that a constant zinc liquid surface and cleanness of zinc liquid in the multi-stage liquating furnace are guaranteed, flow speed, flow quantity and temperature of the zinc liquid flowing out from the melting furnace are constant, and continuous and stable production is achieved. Zinc steam flowing out from an evaporation furnace condenses into the high-fineness zinc powder in an efficient condenser, and due to the fact that the condenser is filled with nitrogen shielding gas, the zinc powder is prevented from being in contact with air. Accordingly, no oxidation film exists on the surface of the prepared zinc powder, the particle size is small and uniform, the specific surface area is large, and activity is good.
Description
Technical field
The present invention relates to zinc powder preparing technical field, more particularly, say a kind of preparation method of high fineness zinc.
Background technology
The purposes of super-fine zinc dust is a lot, is widely used in the industries such as chemical industry, anticorrosion with coat, hydrometallurgy (for solution purification and metal replacement recovery etc.), medicine, agricultural chemicals and battery.But maximum industries or the coating and anticorrosion of use at present, for making zinc-rich paint or being directly plated on anticorrosive coat.According to the difference of film forming base-material, zinc-rich anti-corrosive paint can be divided into organic zinc-rich paint and inorganic zinc coating.It is film forming base-material that organic zinc-rich paint is commonly used epoxy-ester, epoxy resin, chlorinated rubber, vinylite and polyurethane resin, and zinc powder is that content in film is up to 85%～92%.Zinc-rich coating is taking waterglass, ethyl orthosilicate etc. as base-material, and in dry film, zinc content reaches 92%.Along with expansion and the pay attention to day by day of people to Anticorrosion of construction scale.Zinc-rich paint is widely used just day by day, thereby the yearly consumption of super-fine zinc dust increasing year by year, and now the Year's consumption in the whole world is more than 200,000 tons, and domestic annual consumption is also more than 80,000 tons.With the comparison of chemical industry purposes, coating zinc powder requires granularity thinner, and according to the difference of manufacturer and formulation for coating material, purposes, General Requirements average grain diameter is below 10 μ m.
Summary of the invention
For obtaining the zinc powder of high fineness, the invention provides a kind of preparation method of high fineness zinc powder.
A preparation method for high fineness zinc powder, comprises the steps:
1) fusing: crude zinc ingot is put into melting furnace, control 460 DEG C～580 DEG C of temperature, be fused into spelter liquid;
2) liquate: the spelter liquid that step 1 is obtained flows pipe by electric heating thermal insulation and adds multi-stage liquating furnace, keeping temperature in multi-stage liquating furnace is 460 DEG C～550 DEG C, zinc liquid flows in multi-stage liquating furnace from zinc liquid inflow entrance, through multiple liquates pond, obtain purer zinc liquid, gained zinc liquid enters cadmium smelting furnace by zinc liquid flow export;
3), except cadmium: the purer zinc liquid that step 2 is obtained passes in cadmium smelting furnace, remove cadmium impurity;
4) deleading: the purer zinc liquid that step 3 is obtained passes in delead smelting furnace, removes plumbous impurity;
5) evaporation: the zinc liquid of removing cadmium and plumbous impurity is passed in vapourizing furnace, make zinc fume;
6) condensation: the zinc fume that step 5 is obtained passes into condensation in efficient condenser, makes high fineness zinc powder;
7) surface treatment: the high fineness zinc powder that step 6 is made carries out anti-oxidant surface treatment and strengthens dispersed surface treatment, antioxidant used is the one of hydroquinones or butylated hydroxy anisole, dispersion intensifier used is ethyl acetate, the one of polyethylene glycol or polyvinyl alcohol, the high fineness zinc powder obtaining is first immersed and in antioxidant pond, carries out anti-oxidant surface treatment, soaking taking-up oven dry after 30 minutes, bake out temperature 30 is spent, by zinc powder put into dispersion intensifier pond and carry out secondary surface treatment, soaking taking-up oven dry after 5 hours, obtain the high fineness zinc powder of finished product.
Further, described melting furnace flows pipe and described multi-stage liquating furnace formation ＂ U ＂ shape linker by electric heating thermal insulation.
Further, described electric heating thermal insulation stream pipe comprises, alumina ceramic tube, be arranged in side by side the Si-Mo rod of alumina ceramic tube both sides, be coated on the outer field flame-proof thermal insulation material of described alumina ceramic tube and Si-Mo rod, be coated on the outer field steel sheel of described flame-proof thermal insulation material, be connected to the electric supply installation on Si-Mo rod, measure the platinum rhodium thermocouple of alumina ceramic tube internal temperature, and PID temp controlled meter.
The present invention uses liquid nitrogen for cooling medium, and nitrogen is protective medium, can produce the zinc powder of non-oxidation, and its particle diameter is little and even, specific area large, activity is good, has realized Automatic continuous steady production; Follow-up twice surface treatment procedure, has improved oxidation resistance, floatability and the dispersiveness of high fineness zinc powder, is conducive to the storage of zinc powder and carrying out smoothly of painting operation.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is made to brief description.
Embodiment 1:
Melting furnace is heated up, make furnace temperature be increased to 460 DEG C of insulations 15 minutes, drop into crude zinc ingot, after crude zinc ingot is fused into zinc water, flow pipe by electric heating thermal insulation again, in this process, electric heating thermal insulation stream pipe remains that temperature is 460 DEG C, zinc water is imported in multi-stage liquating furnace, multi-stage liquating furnace remains 500 DEG C of temperature, zinc water flows into after multi-stage liquating furnace, flow into except cadmium smelting furnace through liquate repeatedly, it is 950 DEG C except cadmium smelting furnace keeps temperature, remove cadmium impurity, flow into afterwards except lead smelter, it is 1100 DEG C except lead smelter keeps temperature, except delead impurity, pure zinc fume is imported in efficient condenser, zinc fume enters after efficient condenser by quenching, zinc fume becomes zinc powder, the zinc powder obtaining is first immersed and in antioxidant pond, carries out anti-oxidant surface treatment, selected antioxidant is hydroquinones, soaking taking-up oven dry after 30 minutes, bake out temperature 30 is spent, by zinc powder put into polyethylene glycol pond and carry out secondary surface treatment, soaking taking-up oven dry after 5 hours, obtain the high fineness zinc powder of finished product.
Embodiment 2:
Melting furnace is heated up, make furnace temperature be increased to 580 DEG C of insulations 15 minutes, drop into crude zinc ingot, after crude zinc ingot is fused into zinc water, flow pipe by electric heating thermal insulation again, in this process, electric heating thermal insulation stream pipe remains that temperature is 550 DEG C, zinc water is imported in multi-stage liquating furnace, multi-stage liquating furnace remains 500 DEG C of temperature, zinc water flows into after multi-stage liquating furnace, flow into except cadmium smelting furnace through liquate repeatedly, it is 900 DEG C except cadmium smelting furnace keeps temperature, remove cadmium impurity, flow into afterwards except lead smelter, it is 1200 DEG C except lead smelter keeps temperature, except delead impurity, pure zinc fume is imported in efficient condenser, zinc fume enters after efficient condenser by quenching, zinc fume becomes zinc powder, the zinc powder obtaining is first immersed and in antioxidant pond, carries out anti-oxidant surface treatment, selected antioxidant is butylated hydroxy anisole, soaking taking-up oven dry after 30 minutes, bake out temperature 30 is spent, by zinc powder put into ethyl acetate pond and carry out secondary surface treatment, soaking taking-up oven dry after 5 hours, obtain the high fineness zinc powder of finished product.
Embodiment 3:
Melting furnace is heated up, make furnace temperature be increased to 520 DEG C of insulations 15 minutes, drop into crude zinc ingot, after crude zinc ingot is fused into zinc water, flow pipe by electric heating thermal insulation again, in this process, electric heating thermal insulation stream pipe remains that temperature is 510 DEG C, zinc water is imported in multi-stage liquating furnace, multi-stage liquating furnace remains 500 DEG C of temperature, zinc water flows into after multi-stage liquating furnace, flow into except cadmium smelting furnace through liquate repeatedly, it is 900 DEG C except cadmium smelting furnace keeps temperature, remove cadmium impurity, flow into afterwards except lead smelter, it is 1200 DEG C except lead smelter keeps temperature, except delead impurity, pure zinc fume is imported in efficient condenser, zinc fume enters after efficient condenser by quenching, zinc fume becomes zinc powder, the zinc powder obtaining is first immersed and in antioxidant pond, carries out anti-oxidant surface treatment, selected antioxidant is butylated hydroxy anisole, soaking taking-up oven dry after 30 minutes, bake out temperature 30 is spent, by zinc powder put into polyvinyl alcohol pond and carry out secondary surface treatment, soaking taking-up oven dry after 5 hours, obtain the high fineness zinc powder of finished product.
Claims (3)
1. a preparation method for high fineness zinc powder, comprises the steps:
1) fusing: crude zinc ingot is put into melting furnace, control 460 DEG C～580 DEG C of temperature, be fused into spelter liquid;
2) liquate: the spelter liquid that step 1 is obtained flows pipe by electric heating thermal insulation and adds multi-stage liquating furnace, keeping temperature in multi-stage liquating furnace is 460 DEG C～550 DEG C, zinc liquid flows in multi-stage liquating furnace from zinc liquid inflow entrance, through multiple liquates pond, obtain purer zinc liquid, gained zinc liquid enters cadmium smelting furnace by zinc liquid flow export;
3), except cadmium: the purer zinc liquid that step 2 is obtained passes in cadmium smelting furnace, remove cadmium impurity;
4) deleading: the purer zinc liquid that step 3 is obtained passes in delead smelting furnace, removes plumbous impurity;
5) evaporation: the zinc liquid of removing cadmium and plumbous impurity is passed in vapourizing furnace, make zinc fume;
6) condensation: the zinc fume that step 5 is obtained passes into condensation in efficient condenser, makes high fineness zinc powder;
It is characterized in that: also comprise the steps:
7) surface treatment: the high fineness zinc powder that step 6 is made carries out anti-oxidant surface treatment and strengthens dispersed surface treatment, antioxidant used is the one of hydroquinones or butylated hydroxy anisole, dispersion intensifier used is ethyl acetate, the one of polyethylene glycol or polyvinyl alcohol, the high fineness zinc powder obtaining is first immersed and in antioxidant pond, carries out anti-oxidant surface treatment, soaking taking-up oven dry after 30 minutes, bake out temperature 30 is spent, by zinc powder put into dispersion intensifier pond and carry out secondary surface treatment, soaking taking-up oven dry after 5 hours, obtain the high fineness zinc powder of finished product.
2. the preparation method of a kind of high fineness zinc powder according to claim 1, is characterized in that: described melting furnace flows pipe by electric heating thermal insulation and forms ＂ U ＂ shape linker with described multi-stage liquating furnace.
3. the preparation method of a kind of high fineness zinc powder according to claim 1, it is characterized in that: described electric heating thermal insulation stream pipe comprises, alumina ceramic tube, be arranged in side by side the Si-Mo rod of alumina ceramic tube both sides, be coated on the outer field flame-proof thermal insulation material of described alumina ceramic tube and Si-Mo rod, be coated on the outer field steel sheel of described flame-proof thermal insulation material, be connected to the electric supply installation on Si-Mo rod, measure the platinum rhodium thermocouple of alumina ceramic tube internal temperature, and PID temp controlled meter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210497002.7A CN103831441A (en) | 2012-11-27 | 2012-11-27 | Method for preparing high-fineness zinc powder |
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| CN201210497002.7A CN103831441A (en) | 2012-11-27 | 2012-11-27 | Method for preparing high-fineness zinc powder |
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| CN103831441A true CN103831441A (en) | 2014-06-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972108A (en) * | 2015-07-07 | 2015-10-14 | 江苏冶建锌业有限公司 | Ultrafine zinc alloy powder and preparation method thereof |
| CN104988353A (en) * | 2015-07-07 | 2015-10-21 | 江苏冶建锌业有限公司 | Cadmium-free lead-free super-fine zinc alloy powder and preparation method thereof |
| CN106392058A (en) * | 2016-08-31 | 2017-02-15 | 有研亿金新材料有限公司 | Preparation method for metal ruthenium powder for target material |
| CN108034966A (en) * | 2017-10-26 | 2018-05-15 | 中国矿业大学 | A kind of method for refining lye electrodepositing zinc powder particles |
| CN115346743A (en) * | 2022-08-08 | 2022-11-15 | 安徽锦华氧化锌有限公司 | Preparation method of zinc oxide of metal oxide arrester resistance card |
| CN115642244A (en) * | 2022-12-07 | 2023-01-24 | 福建南平南孚电池有限公司 | Alkaline zinc-manganese battery cathode material |
-
2012
- 2012-11-27 CN CN201210497002.7A patent/CN103831441A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972108A (en) * | 2015-07-07 | 2015-10-14 | 江苏冶建锌业有限公司 | Ultrafine zinc alloy powder and preparation method thereof |
| CN104988353A (en) * | 2015-07-07 | 2015-10-21 | 江苏冶建锌业有限公司 | Cadmium-free lead-free super-fine zinc alloy powder and preparation method thereof |
| CN104988353B (en) * | 2015-07-07 | 2017-01-11 | 江苏冶建锌业有限公司 | Cadmium-free lead-free super-fine zinc alloy powder and preparation method thereof |
| CN106392058A (en) * | 2016-08-31 | 2017-02-15 | 有研亿金新材料有限公司 | Preparation method for metal ruthenium powder for target material |
| CN108034966A (en) * | 2017-10-26 | 2018-05-15 | 中国矿业大学 | A kind of method for refining lye electrodepositing zinc powder particles |
| CN108034966B (en) * | 2017-10-26 | 2019-08-27 | 中国矿业大学 | A method of refining lye electrodepositing zinc powder particles |
| CN115346743A (en) * | 2022-08-08 | 2022-11-15 | 安徽锦华氧化锌有限公司 | Preparation method of zinc oxide of metal oxide arrester resistance card |
| CN115346743B (en) * | 2022-08-08 | 2023-12-01 | 安徽锦华氧化锌有限公司 | Preparation method of metal oxide arrester resistor disc |
| CN115642244A (en) * | 2022-12-07 | 2023-01-24 | 福建南平南孚电池有限公司 | Alkaline zinc-manganese battery cathode material |
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Application publication date: 20140604 |