CN86101430A - From contain the potassium ashes, remove the method for cryanide ion - Google Patents
From contain the potassium ashes, remove the method for cryanide ion Download PDFInfo
- Publication number
- CN86101430A CN86101430A CN 86101430 CN86101430A CN86101430A CN 86101430 A CN86101430 A CN 86101430A CN 86101430 CN86101430 CN 86101430 CN 86101430 A CN86101430 A CN 86101430A CN 86101430 A CN86101430 A CN 86101430A
- Authority
- CN
- China
- Prior art keywords
- ashes
- potassium
- cryanide ion
- contain
- molten
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the method that from contain the potassium ashes, removes cryanide ion, purpose is to be raw material with the potassium felspar sand, blast furnace process is produced and is removed cryanide ion when white cement extracts sylvite from the by-product ashes, improve the quality of products, reduce environmental pollution, it is characterized in that before the usefulness water logging is molten, earlier ashes are calcined, make cyanide oxidation, when using water logging molten, add the oxygenant reoxidation then, thereby remove cryanide ion.The present invention can make and contain that cryanide ion removes more than 99.9% in the potassium ashes.
Description
The present invention is relevant with the method that removes cryanide ion from contain the potassium ashes, specifically, with the potassium felspar sand for the raw material blast furnace process is produced white cement, the method that removes cryanide ion when extracting sylvite from its by-product ashes is relevant.
By-product when producing white cement with the potassium felspar sand for the raw material blast furnace process contains the technology of extracting sylvite the potassium ashes, there are the practical situation of enriching the potassium felspar sand resource to propose in conjunction with China, this technology had both enlarged white cement output, can extract sylvite from the by-product ashes again.(Northwest University's chemical industry is that grandson comes nine etc.: " is the research that raw material is produced potassium primary phosphate to contain the potassium ashes ", " inorganic chemicals industry " 9,1～5,1984) but this technology lacks the treatment measures that remove cryanide ion specially, the content of cryanide ion can only rely on and extract oxidation voluntarily in the sylvite process, decomposition, volatilization and reduce.Therefore, tend to emit the HCN of severe toxicity when extracting, contaminate environment is poisoned operator, also can cause spontaneous combustion under given conditions.And remain in cyanide content in the sylvite also than higher, cause the use of product to be absolutely unsafe.On technology, because ashes are handled without the calcining decyanation, ashes unit weight is light, and 300kg/m is generally only arranged
3, leaching after-filtration intensity is low, is 36 millimeters of 3: 1, filter cake thickness at water cement ratio, and vacuum tightness is under the condition of 400～500 mmhg, intensity filter only reaches the dried slag of 4～10kg()/m
2Hr.Simultaneously, product color is poor, can turn blue when meeting acid.
The object of the present invention is to provide the method that from contain the potassium ashes, removes cryanide ion specially, to eliminate above-mentioned all shortcomings in the technology.
For achieving the above object, the present invention proposes following solution: calcine in reverberatory furnace or rotary kiln earlier before molten with water logging will containing the potassium ashes, make cyanide oxidation in the ashes, thereby reduce cryanide ion content.Calcining temperature is controlled between 600～800 ℃, crosses low then fully oxidation of cryanide ion; The too high sylvite that then can cause volatilizees, and generally is advisable with 700 ℃.Ashes residence time in calcination process was advisable with 0.5 to 1 hour, and the residence time is too short, and cryanide ion removes insufficient; The residence time is oversize, then can influence production efficiency.When calcining with reverberatory furnace, ashes thickness is advisable grilling thoroughly.The potassium ashes that contain after calcining when molten, are adding oxygenant, once more with water-soluble cyanide oxidation (two sections oxidations), to remove cryanide ion with water logging.Oxygenant commonly used is hydrogen peroxide (superoxol), and its consumption is about 3 times of cryanide ion mole number.Pass through the ashes of spontaneous combustion under certain condition, because CN
-Content is lower, can select a kind of method in above-mentioned two sections oxidations to remove remaining CN
-
Method of the present invention is by calcination processing and add two sections oxidations of oxygenant, can make to contain that cryanide ion removes more than 99.9% in the potassium ashes.This just makes the technology of extracting sylvite from contain the potassium ashes avoided producing the HCN of severe toxicity fully, and the contained prussiate of product is atomic, and is safe in utilization, can be used as industrial raw material, agrochemical; Product color is good, and meeting acid can variable color yet.On technology, through calcination processing, ashes unit weight is brought up to 1000kg/m
3More than, leaching after-filtration intensity improves greatly, and under equal conditions, intensity filter can improve more than ten times, reaches the dried slag of 100～200kg()/m
2Hr helps enhancing productivity.
Following examples can prove absolutely the present invention:
Embodiment 1,300 gram ashes wherein contain KCN7.84%, contain K
4Fe(CN)
60.31%, always contain CN
-Amount is 3.27%, contains total CN in calcining under 700 ℃ after 0.5 hour
-Amount drops to 0.0145%, and water-soluble after-filtration intensity reaches the dried slag of 113.2kg()/m
2Hr.
Embodiment 2, and ashes consumption, composition were calcined 1 hour down at 700 ℃ with embodiment 1, always contained CN
-Amount drops to 0.011%, and water-soluble after-filtration intensity reaches the dried slag of 171.4kg()/m
2Hr.
Embodiment 3, and ashes consumption, composition were calcined 0.5 hour down at 800 ℃ with embodiment 1, always contained CN
-Amount drops to 0.013%, and water-soluble after-filtration intensity reaches the dried slag of 140kg()/m
2Hr.
Embodiment 4, with 300 grams of the potassium ash after the calcining, with 2000 milliliters of 60 ℃ of hot water soak molten after, contain CN
-Amount is 0.579 grams per liter, adds 30%H
2O
23.2 milliliter, 50 ℃, stir under reaction 15 minutes, contain CN
-Amount drops to 0.0386 grams per liter, CN
-Decreasing ratio be 93.3%.
Claims (6)
1, a kind of method that removes cryanide ion from contain the potassium ashes, feature of the present invention are to carry out calcination processing with containing the potassium ashes earlier before molten with water logging, and then add oxygenant when using water logging molten, make two sections oxidations of prussiate in the ashes, thereby remove cryanide ion.
2, in accordance with the method for claim 1, it is characterized in that calcining contains the potassium ashes and adopts reverberatory furnace or rotary kiln to carry out.
3, according to claim 1 and 2 described methods, the calcining temperature that it is characterized in that containing the potassium ashes is 600 ℃ to 800 ℃.
4, according to the described method of claim 1 to 3, it is characterized in that containing the potassium ashes is 0.5 to 1 hour in the residence time of calcination process.
5, in accordance with the method for claim 1, when it is characterized in that with the molten burnt ashes of water logging, the oxygenant of adding is a hydrogen peroxide.
6, in accordance with the method for claim 5, the amount that it is characterized in that the hydrogen peroxide that added is about 3 times of cryanide ion mole number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86101430 CN86101430A (en) | 1986-03-05 | 1986-03-05 | From contain the potassium ashes, remove the method for cryanide ion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86101430 CN86101430A (en) | 1986-03-05 | 1986-03-05 | From contain the potassium ashes, remove the method for cryanide ion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86101430A true CN86101430A (en) | 1987-06-24 |
Family
ID=4801381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86101430 Pending CN86101430A (en) | 1986-03-05 | 1986-03-05 | From contain the potassium ashes, remove the method for cryanide ion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86101430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185265A (en) * | 2021-07-01 | 2021-07-30 | 北京矿冶研究总院 | Cyanide sludge sintering cyanogen removal process, cyanide-free brick, cyanide sludge sintering cyanogen removal system and application |
-
1986
- 1986-03-05 CN CN 86101430 patent/CN86101430A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185265A (en) * | 2021-07-01 | 2021-07-30 | 北京矿冶研究总院 | Cyanide sludge sintering cyanogen removal process, cyanide-free brick, cyanide sludge sintering cyanogen removal system and application |
| CN113185265B (en) * | 2021-07-01 | 2021-11-05 | 北京矿冶研究总院 | Cyanide sludge sintering cyanogen removal process, cyanide-free brick, cyanide sludge sintering cyanogen removal system and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101913573B (en) | Method for producing sulfuric acid and iron oxide red | |
| CN102399976B (en) | Roasting pretreatment process for extracting vanadium pentoxide from high-carbon scherbinaite-containing coal mine and vanadium pentoxide extracting method | |
| CN102534187A (en) | Method for treating pyrite cinder by combining acidic leaching with alkaline dissolving | |
| CN111926196B (en) | Method for recovering zinc from smelting waste residues | |
| CN1057130C (en) | Vanadium pentoxide extracting method from stone coal vanadium ore | |
| CN102534195B (en) | Gold extraction process method for refractory gold ore | |
| CN100360429C (en) | Method for decomposing potash feldspar ore by low temperature wet process | |
| CN114014294B (en) | Method for preparing lithium iron phosphate by using pyrite and lithium iron phosphate material | |
| CN103074496A (en) | Method for separating and purifying magnesium dioxide from anode mud | |
| CN1899971B (en) | Method for extracting V2O5 from stone coal vanadium ore | |
| CN86101430A (en) | From contain the potassium ashes, remove the method for cryanide ion | |
| CN86108218B (en) | One time vanadium dregs roasting in rotary furnace and extraction of vanadium by the aquo-soaking | |
| CN1400162A (en) | Method for purifying synthetic diamond semi-finished product containing non-diamond carbon | |
| CN1049141A (en) | Produce the sinter process of Vanadium Pentoxide in FLAKES | |
| CN107697896A (en) | A kind of method that high-purity phosphoric acid iron is prepared using ferric manganese ore as raw material | |
| CN112111647B (en) | Method for pre-treating gold leaching by using gold ore calcine or roasting cyanidation tailings | |
| CN108147437B (en) | Method for producing high-purity magnesium oxide by taking magnesium arsenate as raw material | |
| US3179497A (en) | Production of selenium oxide, tellurium oxide or mixture thereof | |
| CN1084895A (en) | Ammonia dipping precipitation is handled the technology of low-grade copper ashes or copper oxide ore | |
| SU1507830A1 (en) | Method of producing red ferric oxide pigment | |
| JPS6236964B2 (en) | ||
| CA1071412A (en) | Calcination of basic ferric sulphates | |
| CN86107137B (en) | Iron-oxide pigment and its preparation method | |
| US3827896A (en) | Method of producing clinker of alumina cement | |
| CN221397972U (en) | Vanadium ore roasting device and processing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |