CN1062844C - Process for producing potassium sulfate and its by-product using potassium ore - Google Patents
Process for producing potassium sulfate and its by-product using potassium ore Download PDFInfo
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- CN1062844C CN1062844C CN95104878A CN95104878A CN1062844C CN 1062844 C CN1062844 C CN 1062844C CN 95104878 A CN95104878 A CN 95104878A CN 95104878 A CN95104878 A CN 95104878A CN 1062844 C CN1062844 C CN 1062844C
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- potassium
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Abstract
The present invention relates to a technological method for producing potassium sulfate and side products of potassium sulfate by using potassium ore. The technological method solves the defects that other components in potassium ore can not be fully used, the potassium ore is produced into spherical granules, a potassium-calcium fertilizer is obtained firstly, then conversion is carried out, the technology is complicated and cockamamie, and side products are not produced. The present invention is characterized in that the mixture of milled potassium ore and limestone is sintered into mature materials to be acidized; a clear solution obtained after sedimentation and filtration is evaporated and crystallized to obtain potassium sulfate; and after settlement is separated, the side products such as aluminum hydroxide, ferric hydroxide, plaster stone and silicic acid are obtained. The technological method can be used for producing potassium sulfate and the side products such as aluminum hydroxide, ferric hydroxide, plaster stone and silicic acid.
Description
The present invention relates to a method for producing fertilizer, in particular, it is a technological process for producing potassium sulfate and its by-product by using potassium ore.
A method for producing a potash fertilizer from potassium feldspar is described in chinese patent document entitled "a method for producing a potash fertilizer from potassium feldspar" with application No. 94138564 and publication No. 1098398 a. The method aims to produce the potash fertilizer from the potash feldspar. The method is characterized in that potash feldspar and limestone are mixed according to the weight percentage of 10: 2-5, crushed and ground to 200 meshes to prepare spherical particles, then the spherical particles are sintered into clinker at the normal pressure of 1200-1450 ℃, the clinker is treated by 98% of sulfuric acid, and the weight percentage of the clinker to the 98% of sulfuric acid is 10: 2-7. The disadvantage is that other components contained in the potassium ore cannot be fully utilized. In addition, spherical particles are required to be prepared in the process, the potassium-calcium fertilizer is obtained and then converted, the process is complex and complicated, and no by-product is produced.
The invention aims to overcome the defects in the prior art and provide a process method for producing potassium sulfate and byproducts thereof by using potassium ore, which can fully utilize other components contained in the potassium ore and has simple process.
The technical solution of the invention is as follows: mixing and grinding potassium ore and limestone according to a calculated proportion, sintering the mixture into clinker at a high temperature, then carrying out acidification treatment on the clinker, and evaporating and crystallizing clear liquid obtained after precipitation and filtration to obtain the potassium sulfate. Separating the sediment to obtain aluminum hydroxide, ferric hydroxide, gypsum and silicic acid byproducts respectively.
Compared with the prior art, the invention has the following advantages:
1. fully utilizes resources, reduces production cost, and improves economic benefit and industrial production value
2. The required mixing proportion of the sulfuric acid (or the gypsum) and the limestone is calculated according to the grade of the potassium ore and is not limited within a certain range, so that the method is suitable for different grades of potassium ores and has a wide application range.
3. Besides producing potassium sulfate with high potassium oxide content, it can also produce potassium-nitrogen compound fertilizer according to the requirements, and recover the by-products of calcium sulfate (gypsum), iron hydroxide and portland cement.
4. The production line formed by the process has the advantages of small investment, quick effect and high profit, and generally recovers all investment within three to four years.
The invention is described in further detail below with reference to examples: 1. mixing and grinding the potassium ore and the limestone to over 180 meshes according to the calculated proportion, sintering the mixture into clinker at the high temperature of 1200-1400 ℃, and reacting in the sintering process as follows:
the required limestone weight percentage is calculated from the grade of the potassium ore according to the above formula.
2. The clinker is subjected to acidification treatment, and the following reactions are generated in the acidificationtreatment:
the weight percentage of the added acid and the water is calculated according to the formula.
3. And evaporating and crystallizing the clear liquid obtained after the precipitation and the filtration to obtain the potassium sulfate.
4. Separating the sediment to obtain aluminum hydroxide, ferric hydroxide, gypsum and silicate cement by-products. Can be used for producing potassium sulfate and byproducts of aluminum hydroxide, ferric hydroxide, gypsum and portland cement.
Claims (2)
1. A process for preparing potassium sulfate and its by-product from potassium feldspar includes such steps as mixing potassium feldspar with lime stone, breaking, grinding, sintering at 1200-1400 deg.C to obtain clinker, and acidifying the clinker, and features that the potassium feldspar and lime stone are mixed, broken and ground to 180 meshes or more, and the weight percentage of lime stone is determined by the reaction formula of potassium feldspar grade at 1200-1400 deg.C: calculating to obtain that in the acidification treatment, the weight percentage of the added acid and water is according to a reaction formula generated in the acidification: and (4) calculating, filtering the precipitate, and evaporating and crystallizing the obtained clear liquid to obtain the potassium sulfate.
2. The process for producing potassium sulfate and its by-products from potassium feldspar according to claim 1, wherein the by-products of aluminum hydroxide, ferric hydroxide, gypsum and portland cement are obtained by separating the sediments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95104878A CN1062844C (en) | 1995-05-04 | 1995-05-04 | Process for producing potassium sulfate and its by-product using potassium ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95104878A CN1062844C (en) | 1995-05-04 | 1995-05-04 | Process for producing potassium sulfate and its by-product using potassium ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1146982A CN1146982A (en) | 1997-04-09 |
| CN1062844C true CN1062844C (en) | 2001-03-07 |
Family
ID=5075276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95104878A Expired - Fee Related CN1062844C (en) | 1995-05-04 | 1995-05-04 | Process for producing potassium sulfate and its by-product using potassium ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1062844C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100500622C (en) * | 2006-12-01 | 2009-06-17 | 华南理工大学 | Process produce composite K-Ca-Si-S fertilizer by desulfurized cinder and potash ore |
| CN101580408B (en) * | 2008-10-31 | 2011-06-22 | 东莞市大众农业科技有限公司 | Method for producing potassium sulphate fertilizer by using gypsum |
| CN103193517B (en) * | 2013-04-28 | 2016-06-22 | 雷志刚 | Utilize the method that potash feldspar produces potash fertilizer coproduction special cement |
| CN103183365B (en) * | 2013-04-28 | 2015-07-08 | 雷志刚 | Method for producing potassium sulphate and co-producing calcium, magnesium, phosphorus and silicon composite fertilizer by potassium feldspar |
| CN103193516B (en) * | 2013-04-28 | 2016-06-22 | 雷志刚 | A kind of method utilizing potash feldspar to manufacture potassium sulphate fertilizer coproduction special cement |
| CN103539165B (en) * | 2013-10-25 | 2014-11-26 | 贵州远盛钾业科技有限公司 | Method for producing potassium sulfate by utilizing insoluble rocks containing potassium |
| CN103539163B (en) * | 2013-10-31 | 2016-03-02 | 洛阳氟钾科技股份公司 | Utilize the technique of potassium felspar sand preparing potassium sulfate |
| CN103539130A (en) * | 2013-10-31 | 2014-01-29 | 洛阳氟钾科技有限公司 | Technological method for preparing white carbon black from potassium feldspar |
| CN103539127B (en) * | 2013-10-31 | 2016-03-16 | 洛阳氟钾科技股份公司 | A kind of decomposition technique of potassium felspar sand |
| CN103539157B (en) * | 2013-10-31 | 2016-06-01 | 洛阳氟钾科技股份有限公司 | The technique of fluorine resource is reclaimed from potassium feldspar decomposition residue |
| CN103539162B (en) * | 2013-10-31 | 2015-01-28 | 洛阳氟钾科技有限公司 | Process method for preparing ammonium-potassium sulfate from potassium feldspar |
| CN103708505A (en) * | 2013-12-31 | 2014-04-09 | 中蓝连海设计研究院 | Method for extracting soluble potassium sulfate by using orthoclase |
| CN105271333B (en) * | 2015-11-18 | 2017-09-26 | 中南大学 | A kind of method that potassium dihydrogen phosphate and aluminium hydroxide are produced by potassium feldspar |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098398A (en) * | 1994-04-29 | 1995-02-08 | 刘金荣 | A kind of method of producing potash fertilizer by potassium felspar sand |
-
1995
- 1995-05-04 CN CN95104878A patent/CN1062844C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098398A (en) * | 1994-04-29 | 1995-02-08 | 刘金荣 | A kind of method of producing potash fertilizer by potassium felspar sand |
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| Publication number | Publication date |
|---|---|
| CN1146982A (en) | 1997-04-09 |
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