CN106927486A - A kind of method for sintering extraction potassium chloride in ash - Google Patents
A kind of method for sintering extraction potassium chloride in ash Download PDFInfo
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- CN106927486A CN106927486A CN201511005271.7A CN201511005271A CN106927486A CN 106927486 A CN106927486 A CN 106927486A CN 201511005271 A CN201511005271 A CN 201511005271A CN 106927486 A CN106927486 A CN 106927486A
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- potassium chloride
- sodium
- grey
- leaching
- extraction process
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The present invention is a kind of processing technology of extraction potassium chloride in ash from sintering, is mainly included the following steps that：Phase analysis and leachate are separated after sintering ash is carried out into molten leaching in certain solution (mainly including No. 1 leaching modifying agent and No. 2 leaching modifying agents), the filter residue after separation is stand-by, and gained filtrate is obtained into Potassium Chloride Product through evaporation and concentration, crystallisation by cooling.Present invention process is simple, low cost, targetedly can recycle the valuable resource in the sintering ash of different qualities.Both the problem of environmental pollution of sintering ash is solved, resource recycling rate is improve again, reach the purpose of " turning waste into wealth, the treatment of wastes with processes of wastes against one another ".
Description
Invention field：
A kind of method the present invention relates to extract potassium chloride in ash from sintering, belongs to the production field of sylvite, falls within trade waste processing technology field.
Background technology：
Sintering ash is the abbreviation of the dust particle that steel plant are collected during iron ore sintering by flue gas of sintering machine head electric cleaner and is commonly called as.At present, in order to implement national energy-saving emission reduction, UTILIZATION OF VESIDUAL HEAT IN and the requirement of clean manufacturing, development and application of China's steel industry to the grey processing and utilizing technology of sintering is paid close attention.But current processing method and utilization form is single：One is that sintering ash is back in the production of sintering deposit as raw material, and valuable element so therein does not obtain rational development and utilization.Two is that will sinter ash to be directly added into wherein as blast furnace compound, because the element composition complexity in sintering ash can corrode blast furnace furnace wall, makes the increase of steel-making energy consumption and equipment loss is serious.
If sintering ash cannot get appropriate treatment and reasonably utilize, not only pollute the environment, increase process for making cost and acceleration equipment loss, can also make valuable element waste therein.Therefore we are devoted to one rational industrial treatment method of exploitation by its recycling.
The content of the invention：
Present invention is directed primarily to provide a kind of method for sintering extraction potassium chloride in ash, mainly realized by following steps.
(A) leach modifying agent by a small amount of No. 1 and be added to the water stirring, be configured to sinter grey leaching agent, then to the grey leaching of a certain amount of sintering is added in leaching agent, carry out first paragraph leaching, it is stand-by after stirring certain hour,
(B) by No. 2 a small amount of leachings modifying agents addition (A), second segment leaching is carried out, stirring stops after a period of time.
(C) filtrate after leaching and filter residue are separated；
(D) after the filtrate of gained in step (C) being evaporated into concentration, crystallisation by cooling, Potassium Chloride Product is obtained after centrifugation.
In the present invention, the solid-liquid mass ratio used described in step (A) is 1: 1~1: 5.
In the present invention, the extraction temperature used described in step (A) is 10 DEG C~85 DEG C, and extraction time is 5min-60min.
In the present invention, the mixing speed used described in step (A) is 50-300rpm.
In the present invention, the solid-liquid mass ratio used described in step (B) is 1: 1~1: 5.
In the present invention, the extraction temperature used described in step (B) is 10 DEG C~85 DEG C, and extraction time is 5min-120min.
In the present invention, the mixing speed used described in step (B) is 50-300rpm.
In the present invention, No. 1 used described in step (A) leaches modifying agent to be formulated according to certain mass ratio by certain in sulfuric acid, hydrochloric acid, nitric acid, sodium sulphate, ammonium sulfate, hydrogen peroxide, sodium chlorate, sodium hypochlorite, sodium phosphate, sodium nitrate, activated carbon, iron powder, zinc powder and aluminium powder is several.
In the present invention, No. 2 used described in step (B) leach modifying agent to be formulated according to certain mass ratio by certain in vulcanized sodium, sodium sulfite, ammonium chloride, ammonium sulfate, calcium oxide, calcium hydroxide, sodium phosphate, activated carbon, hydrogen peroxide, sodium chlorate, sodium hypochlorite, sodium carbonate, NaOH, iron powder, zinc powder, aluminium powder, PAM, sodium oxalate, ascorbic acid is several.
The present invention has many advantages, such as and works well, specific as follows：The KCE content more than 95% (potassium oxide content more than 60%) extracted using such scheme, reaches the class high-class product requirement of National agricultural one.Valuable metal lead, silver and iron in filter residue etc. are extracted in subsequent handling, its contaminative to environment is preferably minimized, new approach is have found for steel industry sintering ash is recycled, while carrying out integrated treatment it is also possible to apply the invention to other trade wastes.The place that technique more optimizes than ever is that the present invention is not required to carry out single removal step, and the leaching rate of potassium chloride in sintering ash is not only increased in leaching step, and has just carried out removal of impurities to sintering ash in leaching process.Equipment cost is so both saved, operating cost is reduced again.
Specific embodiment：
The method that potassium chloride is extracted in kind sintering ash, the method is mainly included the following steps that：
(A) leach modifying agent (being formulated according to certain mass ratio by certain in sulfuric acid, hydrochloric acid, nitric acid, sodium sulphate, ammonium sulfate, hydrogen peroxide, sodium chlorate, sodium hypochlorite, sodium phosphate, sodium nitrate, activated carbon, iron powder, zinc powder and aluminium powder is several) by a small amount of No. 1 and be added to the water stirring, it is configured to sinter grey leaching agent, then to entering a certain amount of grey leaching of sintering in leaching agent, first paragraph leaching is carried out according to solid-liquid mass ratio 1: 1~1: 5, mixing time 5min-120min, whipping temp is 10 DEG C~85 DEG C.
(B) by No. 2 a small amount of leachings modifying agent (being formulated according to certain mass ratio by certain in vulcanized sodium, sodium sulfite, ammonium chloride, ammonium sulfate, calcium oxide, calcium hydroxide, sodium phosphate, activated carbon, hydrogen peroxide, sodium chlorate, sodium hypochlorite, sodium carbonate, NaOH, iron powder, zinc powder, aluminium powder, PAM, sodium oxalate, ascorbic acid is several) addition (A), second segment leaching is carried out according to solid-liquid mass ratio 1: 1~1: 5, mixing time 5min-120min, whipping temp is 10 DEG C~85 DEG C.
(C) and then carry out being filtrated to get filtrate and filter residue.
(D) after the filtrate of gained in step (C) being evaporated into concentration, crystallisation by cooling, Potassium Chloride Product is obtained after centrifugation.
We provide instantiation for the present invention below：
Example one：The technical indicator of the raw material sintering flue dust that this experiment is used is (by weight)：
Fe15.86%, CaO7.73%, SiO212.43%th, Al2O3.86%, MgO1.07%, K2O21.79%, Na2O3.48%, Pb19.61%, Cu0.88%.
Taking sodium sulphate, calcium oxide, activated carbon, iron powder, aluminium powder concentrates material to be configured to No. 1 leachate 1000mL, and 1000g sintering ashes are added in No. 1 leachate, is that in the case that 30 DEG C of rotating speeds are 100rpm, 60min is stand-by for stirring in temperature.
Sodium chlorate, vulcanized sodium, sodium phosphate, sodium carbonate, ammonium chloride, PAM are taken according to certain order and mass ratio, is added to while stirring in above-mentioned stand-by solution, be to stir 30min in the case that 30 DEG C of rotating speeds are 100rpm in temperature.
Filter residue subsequent treatment after above-mentioned solution is separated, filtrate is stand-by.
The filtrate that will be obtained is evaporated after concentration, crystallisation by cooling the potassium chloride for obtaining.The wherein extraction rate reached of potassium chloride is to more than 90%.KCE content more than 95% in the product for obtaining, water content belongs to the class high-class product standard of agricultural supplie one less than 4%.
Example two：The technical indicator of the raw material sintering flue dust that this experiment is used is (by weight)：
Fe17.55%, CaO8.61%, SiO215.77%th, Al2O2.16%, MgO0.97%, K2O17.56%, Na2O1.03%, Pb11.20%, Cu1.47%.
Take sulfuric acid, sodium phosphate, sodium nitrate and added water according to certain mass ratio and be configured to No. 1 leachate 1000mL, 800g sintering ashes are added in No. 1 leachate, it is stand-by to stir 40min in the case that rotating speed is 50rpm when temperature is 40 DEG C.
Take calcium oxide, calcium hydroxide, sodium phosphate, sodium carbonate, activated carbon, PAM, be added in above-mentioned solution according to certain order and mass ratio, the rotating speed when temperature is 40 DEG C is to stir 30min in the case of 50rpm.
Filter residue subsequent treatment after above-mentioned solution is separated, filtrate is stand-by.
The filtrate that will be obtained is evaporated after concentration, crystallisation by cooling the potassium chloride for obtaining.The wherein extraction rate reached of potassium chloride is to more than 90%.KCE content more than 95% in the product for obtaining, water content belongs to agricultural supplie high-class product standard less than 4%.
Claims (9)
1. the extraction process of potassium chloride in ash is sintered, it is characterised in that comprised the following steps：
(A) leach modifying agent by a small amount of No. 1 and be added to the water stirring, be configured to sinter grey leaching agent, then to entering in leaching agent
A certain amount of grey leaching of sintering, carries out first paragraph leaching, stand-by after stirring certain hour.
(B) by No. 2 a small amount of leachings modifying agents addition (A), second segment leaching is carried out, stirring stops after a period of time.
(C) and then carry out being filtrated to get filtrate and filter residue.
(D) after the filtrate of gained in step (C) being evaporated into concentration, crystallisation by cooling, Potassium Chloride Product is obtained after centrifugation.
2. the extraction process of potassium chloride during sintering according to claim 1 is grey, it is characterised in that：Solid-liquid matter in step (A)
Amount is than being 1: 1~1: 5.
3. the extraction process of potassium chloride during sintering according to claim 1 is grey, it is characterised in that：Leaching in step (A)
Temperature is 10 DEG C~85 DEG C, and extraction time is 5min-60min.
4. the extraction process of potassium chloride during sintering according to claim 1 is grey, it is characterised in that：Stirring in step (A)
Speed is 50-300rpm.
5. the extraction process of potassium chloride during sintering according to claim 1 is grey, it is characterised in that：Solid-liquid matter in step (B)
Amount is than being 1: 1~1: 5.
6. the extraction process of potassium chloride during sintering according to claim 1 is grey, it is characterised in that：Leaching in step (B)
Temperature is 10 DEG C~85 DEG C, and extraction time is 5min-120min.
7. the extraction process of potassium chloride during sintering according to claim 1 is grey, it is characterised in that：Stirring in step (B)
Speed is 50-300rpm.
8. the extraction process of potassium chloride during sintering according to claim 1 is grey, it is characterised in that：No. 1 in step (A)
Leach modifying agent be according to it is different sintering ash in elemental compositions and content, by sulfuric acid, hydrochloric acid, nitric acid, sodium sulphate, ammonium sulfate,
Certain in hydrogen peroxide, sodium chlorate, sodium hypochlorite, sodium phosphate, sodium nitrate, activated carbon, iron powder, zinc powder and aluminium powder it is several according to
Certain mass ratio is formulated.
9. the extraction process of potassium chloride during sintering according to claim 1 is grey, it is characterised in that：No. 2 in step (B)
Leach modifying agent be according to it is different sintering ash in elemental compositions and content, by vulcanized sodium, sodium sulfite, ammonium chloride, ammonium sulfate,
Calcium oxide, calcium hydroxide, sodium phosphate, activated carbon, hydrogen peroxide, sodium chlorate, sodium hypochlorite, sodium carbonate, NaOH, iron
Certain in powder, zinc powder, aluminium powder, PAM, sodium oxalate, ascorbic acid is several to be formulated according to certain mass ratio.
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| CN201511005271.7A CN106927486A (en) | 2015-12-30 | 2015-12-30 | A kind of method for sintering extraction potassium chloride in ash |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107673374A (en) * | 2017-10-27 | 2018-02-09 | 中国轻工业长沙工程有限公司 | Steel mill sinters flue dust and desulfurization waste liquor method of comprehensive utilization |
| CN112707739A (en) * | 2020-12-30 | 2021-04-27 | 辽宁科技大学 | Method for removing potassium chloride in bricks used in cement kiln |
| CN114044528A (en) * | 2021-12-22 | 2022-02-15 | 湘潭大学 | Method for recovering potassium chloride from ferrous metallurgy sintering ash through solvent crystallization separation |
| CN114835084A (en) * | 2022-04-21 | 2022-08-02 | 重庆正通材料科技有限公司 | Hydrogen generation physical therapy material bag and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54116302A (en) * | 1978-03-02 | 1979-09-10 | Nippon Kokan Kk <Nkk> | Treating method for dust collected by electric precipitator used in main exhauster for sintering |
| CN101723410A (en) * | 2009-12-10 | 2010-06-09 | 湖南华菱湘潭钢铁有限公司 | Method for recovering potassium elements from sintering ashes of steel and iron works and preparing potassium sulfate |
| CN102134648A (en) * | 2011-02-19 | 2011-07-27 | 唐山汇鑫嘉德节能减排科技股份有限公司 | Method for comprehensive treatment of industrial waste |
-
2015
- 2015-12-30 CN CN201511005271.7A patent/CN106927486A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54116302A (en) * | 1978-03-02 | 1979-09-10 | Nippon Kokan Kk <Nkk> | Treating method for dust collected by electric precipitator used in main exhauster for sintering |
| CN101723410A (en) * | 2009-12-10 | 2010-06-09 | 湖南华菱湘潭钢铁有限公司 | Method for recovering potassium elements from sintering ashes of steel and iron works and preparing potassium sulfate |
| CN102134648A (en) * | 2011-02-19 | 2011-07-27 | 唐山汇鑫嘉德节能减排科技股份有限公司 | Method for comprehensive treatment of industrial waste |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107673374A (en) * | 2017-10-27 | 2018-02-09 | 中国轻工业长沙工程有限公司 | Steel mill sinters flue dust and desulfurization waste liquor method of comprehensive utilization |
| CN112707739A (en) * | 2020-12-30 | 2021-04-27 | 辽宁科技大学 | Method for removing potassium chloride in bricks used in cement kiln |
| CN114044528A (en) * | 2021-12-22 | 2022-02-15 | 湘潭大学 | Method for recovering potassium chloride from ferrous metallurgy sintering ash through solvent crystallization separation |
| CN114835084A (en) * | 2022-04-21 | 2022-08-02 | 重庆正通材料科技有限公司 | Hydrogen generation physical therapy material bag and preparation method thereof |
| CN114835084B (en) * | 2022-04-21 | 2024-03-15 | 重庆正通材料科技有限公司 | Hydrogen generation physiotherapy material bag and preparation method thereof |
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