CN105110364A - Method for preparing zinc sulfate - Google Patents
Method for preparing zinc sulfate Download PDFInfo
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- CN105110364A CN105110364A CN201510627698.4A CN201510627698A CN105110364A CN 105110364 A CN105110364 A CN 105110364A CN 201510627698 A CN201510627698 A CN 201510627698A CN 105110364 A CN105110364 A CN 105110364A
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- zinc
- ammonium sulfate
- liquid
- aluminium
- ore
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Abstract
The invention relates to a method for preparing zinc sulfate. The method includes: zinc oxide ore is ground below 35-60 micrometers and evenly mixed with ammonium sulfate, the amount of the added ammonium sulfate is 1-2 times of the theoretical amount of ammonium sulfate needed for exactly reacting with zinc, iron and aluminum in the zinc oxide ore completely, calcination temperature is 350-600 DEG C, and calcination time is 1-3 hours; tail gas produced during calcination is absorbed with sulfuric acid and returned to calcination; calcinated clinker is dissolved out with water, liquid-solid mass ratio is 2.5:1-7:1, stirring is performed during dissolving out, dissolving out time is 0.5-3 hours, dissolving out temperature is 40-130 DEG C, and filtration is performed after dissolving out.
Description
Technical field
The present invention relates to a kind of method utilizing middle-low grade zinc oxide ore and zinc oxide, plumbous oxide mineral intergrowth to prepare zinc sulfate, be specifically related to the comprehensive utilization of lapis calaminaris, smithsonite, willemite and zinc oxide, plumbous oxide mineral intergrowth.
Background technology
Occurring in nature zinc ore major part exists with zinc sulfide ore form.The consumption of China's zinc sulfide concentrates is huge, and lead zinc sulphur ore has been exploited for many years, and output is difficult to improve, and can not meet the demand for development of China's zinc abstraction.The zinc oxide ore resource of China is very abundant, and Lanping, yunnan Province Pb-Zn deposits contains a large amount of zinc oxide ores, is the giant beam of reserves more than 1,000 ten thousand tons.In addition, the zinc oxide ore that reserves are greater than 2,000,000 tons has 6.The process of zinc oxide ore and smelting are using an important sources as zinc metal.
Chinese invention patent ZL201210093594.6 proposes a kind of method utilizing middle-low grade zinc oxide ore and zinc oxide, plumbous oxide mineral intergrowth to prepare lead chloride and zinc sulfate, wherein records " by levigate for zinc ore to less than 80 μm, with ammonium sulfate Homogeneous phase mixing.The amount adding ammonium sulfate is the zinc in zinc oxide ore, 0.8 ~ 1.5 times of ammonium sulfate theoretical value needed for iron, the lucky complete reaction of aluminium, maturing temperature is 350 DEG C ~ 500 DEG C, time is 1h ~ 3h "; due to zinc ore and ammonium sulfate carry out chemical reaction degree and levigate after zinc ore size and add the amount of ammonium sulfate and subsequent technique relevant; so the output in order to improve zinc sulfate, the present invention is realized by following:
Will
zincore deposit is levigate to less than 35-60 μm, with ammonium sulfate Homogeneous phase mixing.Add the amount of ammonium sulfate for oxidation
zincin ore deposit
zinc, iron, 1 ~ 2 times of ammonium sulfate theoretical value needed for the lucky complete reaction of aluminium, maturing temperature is 350 DEG C ~ 600 DEG C, and the time is 1h ~ 3h; The tail gas sulfuric acid absorption produced in roasting process, then return calcining process.
Roasting grog with water-soluble go out, liquid-solid mass ratio is 2.5: 1 ~ 7: 1, stirs in process in leaching, and dissolution time is 0.5h ~ 3h, and temperature is 40 DEG C ~ 130 DEG C, and stripping terminates rear filtration.
Gained sulfuric acid
zinc, ferric sulfate, aluminum sulfate mixture solution adopt goethite process: Clinker digestion liquid is added hydrogen peroxide oxidation Fe2+, and is sprayed onto in end liquid with certain flow, keep Fe3+ concentration in end liquid at below 1g/L, to use
zinccalcining regulator solution pH is 3.5 ~ 5.0, and stirring reaction at 80 DEG C ~ 110 DEG C, solution Fe3+ concentration is down to below 0.01g/L after completion of the reaction, and aluminium precipitates with the form of aluminium hydroxide simultaneously, and filter, filtrate is sulfuric acid
zincsolution, filter residue is pyrrhosiderite and a small amount of aluminium hydroxide.
Preferably by levigate for zinc ore to 40 μm;
The amount preferably adding ammonium sulfate is the zinc in zinc oxide ore, 1.6 times of ammonium sulfate theoretical value needed for iron, the lucky complete reaction of aluminium;
Preferred baking temperature is 530 DEG C;
The time that preferably bakes is 2.5h;
Preferred liquid-solid mass ratio is 3.4:1;
Dissolution time is 2.6h;
The output of the zinc sulfate now obtained compares the output increased 10%-20% of the zinc sulfate obtained according to patent of invention ZL201210093594.6, thus improves the output of zinc sulfate particularly.
Claims (2)
1. prepare a method for zinc sulfate, it is characterized in that:
(1) will be oxidized
zincore deposit is levigate to less than 35-60 μm, with described ammonium sulfate Homogeneous phase mixing, adds the amount of ammonium sulfate for oxidation
zincin ore deposit
zinc, iron, 1 ~ 2 times of ammonium sulfate theoretical value needed for the lucky complete reaction of aluminium, mixed material is carried out roasting, and maturing temperature is 350 DEG C ~ 600 DEG C, and the time is 1h ~ 3h; The tail gas sulfuric acid absorption produced in roasting process, then return calcining process;
(2) roasting grog with water-soluble go out, liquid-solid mass ratio is 2.5: 1 ~ 7: 1, stirs in process in leaching, and dissolution time is 0.5h ~ 3h, and temperature is 40 DEG C ~ 130 DEG C, and stripping terminates rear filtration;
(3) Clinker digestion liquid is added hydrogen peroxide oxidation Fe2+, and be sprayed onto in end liquid with certain flow, keep Fe3+ concentration in end liquid at below 1g/L, to use
zinccalcining regulator solution pH is 3.5 ~ 5.0, and stirring reaction at 80 DEG C ~ 110 DEG C, solution Fe3+ concentration is down to below 0.01g/L after completion of the reaction, and aluminium precipitates with the form of aluminium hydroxide simultaneously, and filter, filtrate is sulfuric acid
zincsolution, filter residue is pyrrhosiderite and a small amount of aluminium hydroxide.
2. method according to claim 1, is characterized in that:
By levigate for zinc ore to 40 μm;
The amount adding ammonium sulfate is the zinc in zinc oxide ore, 1.6 times of ammonium sulfate theoretical value needed for iron, the lucky complete reaction of aluminium;
Baking temperature is 530 DEG C;
The time of baking is 2.5h;
Liquid-solid mass ratio is 3.4:1;
Dissolution time is 2.6h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627698.4A CN105110364A (en) | 2015-09-29 | 2015-09-29 | Method for preparing zinc sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627698.4A CN105110364A (en) | 2015-09-29 | 2015-09-29 | Method for preparing zinc sulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105110364A true CN105110364A (en) | 2015-12-02 |
Family
ID=54658536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510627698.4A Pending CN105110364A (en) | 2015-09-29 | 2015-09-29 | Method for preparing zinc sulfate |
Country Status (1)
| Country | Link |
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| CN (1) | CN105110364A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107858509A (en) * | 2017-11-13 | 2018-03-30 | 中国恩菲工程技术有限公司 | The device of iron removaling in hydrometallurgy iron-containing liquor |
| CN108060303A (en) * | 2017-11-13 | 2018-05-22 | 中国恩菲工程技术有限公司 | The method that iron is removed in hydrometallurgy iron-containing liquor |
| CN109879323A (en) * | 2019-02-20 | 2019-06-14 | 武汉科技大学 | It is a kind of to prepare ferritic method using electric furnace dust and mill scale |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108798A (en) * | 1986-12-30 | 1988-08-03 | 戴元宁 | The full wet method of zinc ore is produced zinc sulfate and active zinc flower |
| CN102730748A (en) * | 2012-04-01 | 2012-10-17 | 东北大学 | Method for preparing lead chloride and zinc sulfate by using mid low grade zinc oxide ores and zinc oxide-lead oxide paragenetic ores |
-
2015
- 2015-09-29 CN CN201510627698.4A patent/CN105110364A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108798A (en) * | 1986-12-30 | 1988-08-03 | 戴元宁 | The full wet method of zinc ore is produced zinc sulfate and active zinc flower |
| CN102730748A (en) * | 2012-04-01 | 2012-10-17 | 东北大学 | Method for preparing lead chloride and zinc sulfate by using mid low grade zinc oxide ores and zinc oxide-lead oxide paragenetic ores |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107858509A (en) * | 2017-11-13 | 2018-03-30 | 中国恩菲工程技术有限公司 | The device of iron removaling in hydrometallurgy iron-containing liquor |
| CN108060303A (en) * | 2017-11-13 | 2018-05-22 | 中国恩菲工程技术有限公司 | The method that iron is removed in hydrometallurgy iron-containing liquor |
| CN109879323A (en) * | 2019-02-20 | 2019-06-14 | 武汉科技大学 | It is a kind of to prepare ferritic method using electric furnace dust and mill scale |
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Application publication date: 20151202 |