CN1098383A - A kind of manufacture method of zinc oxide - Google Patents
A kind of manufacture method of zinc oxide Download PDFInfo
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- CN1098383A CN1098383A CN 93111702 CN93111702A CN1098383A CN 1098383 A CN1098383 A CN 1098383A CN 93111702 CN93111702 CN 93111702 CN 93111702 A CN93111702 A CN 93111702A CN 1098383 A CN1098383 A CN 1098383A
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- zinc oxide
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Abstract
The invention belongs to the chemical engineering industry technical field, relate to the manufacture method of zinc oxide.It is characterized in that with the tankage zinc hydroxide of zinc powder method vat powder through washing heating and pressurizing dehydration, heating steam pressure: 0.1-1.0MPa, temperature: 100-300 ℃, mixing speed 〉=20 rev/min, dewatering time are in 1 hour, through cooling, solid-liquid separation, drying, be sintered into zinc oxide.Technology of the present invention is simple, and is easy to operate, and labor strength is low, and energy consumption is low, and rate of recovery height, non-environmental-pollution, zinc oxide content height, content be at 99-99.5%, and low cost of manufacture is active high.
Description
The invention belongs to the chemical engineering industry technical field, relate to the manufacture method of zinc oxide.
Zinc oxide is a kind of important basic chemical industry raw material, and the method for making zinc oxide has direct method, indirect method and wet method.Indirect method is zinc to be fused in the metallic zinc heating flash to zinc fume, and zinc fume is reoxidised into zinc oxide, owing to raw material metal zinc costs an arm and a leg, thereby the product cost height, energy consumption is big, and zinc oxide is active little.Wet method is to utilize sulfuric acid to leach, and after SPC-D or bicarbonate of ammonia displacement, calcining makes zinc oxide, and this method environmental pollution is serious, complex process, and the rate of recovery is low, and labour intensity is also very strong.The method comparatively approaching with the present invention is to adopt direct method to make zinc oxide.Direct method is that the zinc oxide with low levels adds coal by a certain percentage, after lime and suitable quantity of water are mixed and stirred, entering pulverizer pulverizes, enter the baler densification after the stirring, the system ball is smelted, temperature is controlled at about 1250 ℃, tap to tap time, every material was about 2 and a half hours, smelts the zinc fume that generates and be oxidized to zinc oxide in oxidizing chamber, and the oxidizing chamber temperature is below 1350 ℃, after the zinc oxide process bag chamber collection that is oxidized to, be placed on calcining in the Ma Shi stove, temperature adds additive rosin simultaneously about 800 ℃, calcination time is 1-2 hour, is cooled to the zinc oxide temperature then and is sieving below 80 ℃.The zinc oxide purity of utilizing this method to make is lower, though cost is low, labour intensity is big, and dust is serious, and environmental pollution is serious, the foreign matter content height.
The objective of the invention is to overcome above-mentioned weak point, thereby provide a kind of manufacturing process simple, the zinc oxide content height, labour intensity is low, and cost is low, free of contamination a kind of zinc oxide manufacture method.
Manufacture method of the present invention is performed such: with the tankage zinc hydroxide (Zn(OH) of zinc powder method vat powder
2) after washing, enter the stirring-type reactor and carry out heating and pressurizing dehydration, heating steam pressure is at 0.1-1.0MPa, temperature in the kettle: 100-300 ℃, pressure: 0.15-1.0MPa, mixing speed 〉=20 rev/min, dewatering time generally got final product in 1 hour, dehydration is carried out solid-liquid separation after refrigerative zinc oxide enters separating machine, the zinc oxide of separating enters the moisture eliminator drying, drying temperature: 70-250 ℃, heating steam pressure: 0.1-1.0MPa, dried zinc oxide enters calcined by rotary kiln, calcining temperature: 300-1100 ℃.
Description of drawings:
Fig. 1 is a craft block-diagram of the present invention:
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
After the tankage zinc hydroxide of zinc powder method vat powder entered swash plate and tentatively wash, in washing beck, wash with the hot water more than 90 ℃ (deionized water is better), behind suction strainer bucket suction strainer, filtrate is returned swash plate dilution in the dilution bucket and is entered the stirring-type reactor, by steam heating (direct heating or indirect heating also can non-steam heating), with zinc hydroxide under the pressurization situation, be dehydrated into zinc oxide, heating steam pressure is controlled at 0.1-0.1MPa, mixing speed 〉=20 rev/min, temperature in the kettle: 100-300 ℃, pressure 0.15-1.0MPa, after the dehydration, enter the stirring-type water cooler and cool off, mixing speed 30-150 rev/min, cooling temperature: 30-80 ℃, enter separating machine through cooled zinc oxide and carry out solid-liquid separation, isolated liquid returns swash plate.The zinc oxide of separating enters the moisture eliminator drying, drying temperature: 70-250 ℃, and heating steam pressure 0.1-1.0MPa, dried zinc oxide enters calcined by rotary kiln, temperature is at 300-1100 ℃, and the finished product zinc oxide content after calcining is more than 99%-99.5%, and outward appearance is white light yellow complexion.
Compared with the prior art the present invention has the following advantages:
1, technological process is simple, and is easy to operate, and labor intensity is low; 2, zinc hydroxide pressurizing and dehydrating, hydrone is deviate from and is not vaporized, and energy consumption is low, rate of recovery height; 3, non-environmental-pollution, finished product zinc oxide content height, cost is low, and is active high.
Claims (1)
1, a kind of manufacture method of zinc oxide is characterized in that the tankage zinc hydroxide (Zn (OH) with zinc powder method vat powder
2) after washing, enter the stirring-type reactor and heat, pressurize, dewater, heating steam pressure is at 0.1-1.0MPa, temperature in the kettle: 100-300 ℃, pressure: 0.15-1.0MPa, mixing speed 〉=20 rev/min, dewatering time generally got final product in 1 hour, dehydration is carried out solid-liquid separation after refrigerative zinc oxide enters separating machine, the zinc oxide of separating enters the moisture eliminator drying, drying temperature: 70-250 ℃, heating steam pressure: 0.1-1.0MPa, dried zinc oxide enters calcined by rotary kiln, calcining temperature 300-1100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111702 CN1033851C (en) | 1993-07-31 | 1993-07-31 | Method for preparation of zinc oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111702 CN1033851C (en) | 1993-07-31 | 1993-07-31 | Method for preparation of zinc oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1098383A true CN1098383A (en) | 1995-02-08 |
| CN1033851C CN1033851C (en) | 1997-01-22 |
Family
ID=4989465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93111702 Expired - Fee Related CN1033851C (en) | 1993-07-31 | 1993-07-31 | Method for preparation of zinc oxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033851C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092687A (en) * | 2010-09-06 | 2011-06-15 | 王嘉兴 | Method for producing zinc hydrosulfite by using sodium hydrosulfite filtration residues |
| CN115161492A (en) * | 2022-07-07 | 2022-10-11 | 桂林理工大学 | Method for preparing high-grade zinc oxide by treating secondary zinc oxide in rotary kiln |
-
1993
- 1993-07-31 CN CN 93111702 patent/CN1033851C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092687A (en) * | 2010-09-06 | 2011-06-15 | 王嘉兴 | Method for producing zinc hydrosulfite by using sodium hydrosulfite filtration residues |
| CN115161492A (en) * | 2022-07-07 | 2022-10-11 | 桂林理工大学 | Method for preparing high-grade zinc oxide by treating secondary zinc oxide in rotary kiln |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1033851C (en) | 1997-01-22 |
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