CN104477906A - Method for extracting activated carbon from coal ashes - Google Patents
Method for extracting activated carbon from coal ashes Download PDFInfo
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- CN104477906A CN104477906A CN201410730183.2A CN201410730183A CN104477906A CN 104477906 A CN104477906 A CN 104477906A CN 201410730183 A CN201410730183 A CN 201410730183A CN 104477906 A CN104477906 A CN 104477906A
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- flotation
- gac
- activated carbon
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- flyash
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Abstract
The invention relates to the technical field of activated carbon extraction, and particularly relates to a method for extracting activated carbon from coal ashes. The method for extracting the activated carbon from coal ashes provided by the invention comprises the following steps: taking pine-seed oil, kerosene, diesel oil and starch at the mass ratio of 3 to 3 to 3 to 1; stirring and mixing the pine-seed oil, the kerosene and the diesel oil evenly, then adding the starch, and stirring to obtain an emulsifier; taking the emulsifier and carophyllin at the mass ratio of 2 to 8, and fully stirring and mixing evenly, so as to obtain a flotation agent; mixing and stirring the coal ashes with water evenly, so as to obtain coal ash slurry; feeing the coal ash slurry into flotation equipment; putting the flotation agent into the coal ash slurry in the flotation equipment, and carrying out flotation, so as to obtain an activated carbon flotation material; filtering the activated carbon flotation material to obtain activated carbon filtered material; drying the activated carbon filtered material according to a drying process, so as to obtain activated carbon agglomerate; and crushing and grinding the activated carbon agglomerate, so as to obtain activated carbon powder.
Description
Technical field
The present invention relates to gac extractive technique field, be specifically related to a kind of method extracting gac from flyash.
Background technology
After coal perfect combustion, the combustible portion combustion heat release amount in coal, moisture in coal evaporates, and remainder is the residue that in the mineral substance of coal, metal and nonmetallic oxide compound and salt are formed, i.e. ash content.China is main energy sources with coal, and 76% of electric power is produced by coal, reaches more than 400,000,000 ton every year, account for 1/3 of national raw coal output with coal.Within 1997, the whole nation produces flyash more than 100,000,000 tons, becomes ash discharge state the biggest in the world, causes serious environmental pollution and occupy a large amount of soils.
The chemical constitution of flyash.Components of coal ash is complicated, forms primarily of the oxide compound of the elements such as charcoal, silicon, aluminium, iron, titanium, calcium, magnesium, sulphur, potassium, sodium and salt.Charcoal and silicone content higher, be secondly aluminium, exist with the Multiple salts forms of complexity, solubility in acid is poor.Iron level is relatively low, exists in the form of an oxide, and solubility in acid is good.In addition unburnt carbon granule, CaO and a small amount of MgO, Na is also had
2o, K
2o, SO
3deng.Objectionable constituent in flyash are uncombusted carbon granules, and its water-absorbent is large, and intensity is low, easy-weathering, is unfavorable for the resource utilization of flyash.SiO in flyash
2, Al2O
3very large to the pozzolanic contribution of flyash, Al
2o
3favourable to reduction fine coal fusion point of ash, make it be easy to form glass microballon, be the beneficiating ingredient of resource utilization.Flyash is applied to building industry, and the CaO content of combined is higher, can improve its self-hardening property, makes its activity be much higher than Class F fly ash, helpful to the concrete early strength of raising.The flyash more than 90% of China power plant emission is Class F fly ash, and exploitation high-calcium fly ass be can yet be regarded as and improved Ash Utilization characteristic bar approach.At present, there is the problems such as the high and waste of raw materials of complex process, cost is serious in the method for the extraction gac of employing.
Summary of the invention
In order to overcome defect of the prior art, the invention provides the method extracting gac from flyash, the technique means of employing is based on physical means, and flotation agent wherein and method for floating, the mode of recycled for multiple times waste liquid achieves highly purified gac.
The present invention is achieved through the following technical solutions: a kind of method extracting gac from flyash, said method comprising the steps of:
Step one: get pine-seed oil, kerosene, diesel oil and starch according to the ratio of mass ratio 3:3:3:1; First described pine-seed oil, kerosene and diesel oil are uniformly mixed, stir at least 20 minutes, fully add described ratio starch after mixing, carry out stirring after at least 50 minutes and obtain emulsifying agent;
Step 2: the emulsifying agent obtain described step one and syringyl alcohol are uniformly mixed according to the ratio of mass ratio 2:8, obtain flotation agent;
Step 3: flyash and water are carried out mixing and stirring according to the ratio of mass percent 35%:65%, obtains pulverized fuel ash slurry;
Step 4: get flotation agent that described step 2 obtains and the pulverized fuel ash slurry that described step 3 obtains puts into floatation equipment according to the proportional range that mass percent is 0.5% to 0.8%, carries out flotation, obtains gac flotation thing;
Step 5: the gac flotation thing described step 4 obtained carries out filtration according to filtration process and obtains activated carbon filtration thing, carries out oven dry by described activated carbon filtration thing according to stoving process and obtains gac caking;
Step 6: the gac caking described step 5 obtained carries out fragmentation and grinding, obtains active carbon powder.
Further, the floatation process in described step 4 comprises the flotation step that repeatedly circulates.
Further, the filtration process in described step 5 comprises use plate and frame filter and filters, and it is 200 order to 300 object screen plates that described plate and frame filter is provided with aperture.
Further, the stoving process in described step 5 comprises drying with steam or stoving oven is dried.
Further, the stoving process in described step 5 comprises activated carbon filtration thing is heated to 125C °, carries out being incubated at least 60 minutes according to every 500 kilograms.
Further, described repeatedly circulation flotation step is at least to carry out 7 circulation flotation.
Further, get flotation agent that described step 2 obtains in described step 4 and the pulverized fuel ash slurry that step 3 obtains puts into floatation equipment according to the ratio that mass percent is 0.6%, carry out flotation.
From flyash, extract the method for gac compared with prior art described in invention, superior effect is: the present invention utilizes repeatedly flotation, and the technique means of recycle waste liquid has extracted highly purified gac.
Accompanying drawing explanation
Fig. 1 is the method process flow diagram extracting gac from flyash of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.
As shown in Figure 1, a kind of method extracting gac from flyash provided by the invention, said method comprising the steps of:
Step one: get pine-seed oil, kerosene, diesel oil and starch according to the ratio of mass ratio 3:3:3:1; First described pine-seed oil, kerosene and diesel oil are uniformly mixed, stir at least 20 minutes, fully add described ratio starch after mixing, carry out stirring after at least 50 minutes and obtain emulsifying agent;
Step 2: the emulsifying agent obtain described step one and syringyl alcohol are uniformly mixed according to the ratio of mass ratio 2:8, obtain flotation agent;
Step 3: flyash and water are carried out mixing and stirring according to the ratio of mass percent 35%:65%, obtains pulverized fuel ash slurry;
Step 4: get flotation agent that described step 2 obtains and the pulverized fuel ash slurry that described step 3 obtains puts into floatation equipment according to the ratio that mass percent scope is 0.5% to 0.8%, carries out flotation, obtains gac flotation thing;
Step 5: the gac flotation thing described step 4 obtained carries out filtration according to filtration process and obtains activated carbon filtration thing, carries out oven dry by described activated carbon filtration thing according to stoving process and obtains gac caking;
Step 6: the gac caking described step 5 obtained carries out fragmentation and grinding, obtains active carbon powder.
The method extracting gac from flyash provided in the present embodiment, the floatation process in described step 4 comprises the flotation step that repeatedly circulates.Filtration process in described step 5 comprises use plate and frame filter and filters, and it is 200 order to 300 object screen plates that described plate and frame filter is provided with aperture.Stoving process in described step 5 comprises drying with steam or stoving oven is dried, stoving process in described step 5 comprises activated carbon filtration thing is heated to 125C °, carry out being incubated at least 60 minutes according to every 500 kilograms, described repeatedly circulation flotation step is at least to carry out 7 circulation flotation, get flotation agent that described step 2 obtains in described step 4 and the pulverized fuel ash slurry that step 3 obtains puts into floatation equipment according to the ratio of mass percent 0.6%, carry out flotation.
The present invention is not limited to above-mentioned embodiment, and when not deviating from flesh and blood of the present invention, any distortion that it may occur to persons skilled in the art that, improvement, replacement all fall into scope of the present invention.
Claims (7)
1. from flyash, extract a method for gac, it is characterized in that, said method comprising the steps of:
Step one: get pine-seed oil, kerosene, diesel oil and starch according to the ratio of mass ratio 3:3:3:1; First described pine-seed oil, kerosene and diesel oil are uniformly mixed, stir at least 20 minutes, fully add described ratio starch after mixing, carry out stirring after at least 50 minutes and obtain emulsifying agent;
Step 2: the emulsifying agent obtain described step one and syringyl alcohol are uniformly mixed according to the ratio of mass ratio 2:8, obtain flotation agent;
Step 3: flyash and water are carried out mixing and stirring according to the ratio of mass percent 35%:65%, obtains pulverized fuel ash slurry;
Step 4: get flotation agent that described step 2 obtains and the pulverized fuel ash slurry that described step 3 obtains puts into floatation equipment according to the proportional range that mass percent is 0.5% to 0.8%, carries out flotation, obtains gac flotation thing;
Step 5: the gac flotation thing described step 4 obtained carries out filtration according to filtration process and obtains activated carbon filtration thing, carries out oven dry by described activated carbon filtration thing according to stoving process and obtains gac caking;
Step 6: the gac caking described step 5 obtained carries out fragmentation and grinding, obtains active carbon powder.
2. from flyash, extract the method for gac according to claim 1, it is characterized in that, the floatation process in described step 4 comprises the flotation step that repeatedly circulates.
3. from flyash, extract the method for gac according to claim 1, it is characterized in that, the filtration process in described step 5 comprises use plate and frame filter and filters, and it is 200 order to 300 object screen plates that described plate and frame filter is provided with aperture.
4. from flyash, extract the method for gac according to claim 1, it is characterized in that, the stoving process in described step 5 comprises drying with steam or stoving oven is dried.
5. from flyash, extract the method for gac according to claim 4, it is characterized in that, the stoving process in described step 5 comprises activated carbon filtration thing is heated to 125 DEG C, carries out being incubated at least 60 minutes according to every 500 kilograms.
6. from flyash, extract the method for gac according to claim 2, it is characterized in that, described repeatedly circulation flotation step is at least to carry out 7 circulation flotation.
7. from flyash, extract the method for gac according to claim 1, it is characterized in that, get flotation agent that step 2 obtains in described step 4 and the pulverized fuel ash slurry that step 3 obtains puts into floatation equipment according to the ratio of mass percent 0.6%, carry out flotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730183.2A CN104477906A (en) | 2014-12-03 | 2014-12-03 | Method for extracting activated carbon from coal ashes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730183.2A CN104477906A (en) | 2014-12-03 | 2014-12-03 | Method for extracting activated carbon from coal ashes |
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| CN104477906A true CN104477906A (en) | 2015-04-01 |
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| CN201410730183.2A Pending CN104477906A (en) | 2014-12-03 | 2014-12-03 | Method for extracting activated carbon from coal ashes |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106669978A (en) * | 2015-11-11 | 2017-05-17 | 神华集团有限责任公司 | Charcoal floating agent, application thereof, and flyash floating charcoal extracting method |
| CN108043360A (en) * | 2017-12-12 | 2018-05-18 | 安徽宇瑞环保建设有限公司 | A kind of method that flyash is processed into magnetic active carbon powder |
| CN110605182A (en) * | 2019-10-25 | 2019-12-24 | 福建三钢闽光股份有限公司 | Blast furnace cloth belt dedusting ash flotation reagent and application method thereof |
| CN110697709A (en) * | 2019-11-13 | 2020-01-17 | 山东大学 | Porous carbon prepared from biomass unburned carbon and application of porous carbon in super capacitor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671016A (en) * | 2008-09-10 | 2010-03-17 | 湖南锋华粉煤灰开发有限公司 | Novel process for preparing activated carbon by use of fly ash |
-
2014
- 2014-12-03 CN CN201410730183.2A patent/CN104477906A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671016A (en) * | 2008-09-10 | 2010-03-17 | 湖南锋华粉煤灰开发有限公司 | Novel process for preparing activated carbon by use of fly ash |
Non-Patent Citations (3)
| Title |
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| 李亚萍等: "煤炭浮选药剂评述", 《选煤技术》 * |
| 李彦君等: "煤泥浮选药剂现状与发展", 《选煤技术》 * |
| 饶增科等: "几种煤用浮选剂的比较", 《成都科技大学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106669978A (en) * | 2015-11-11 | 2017-05-17 | 神华集团有限责任公司 | Charcoal floating agent, application thereof, and flyash floating charcoal extracting method |
| CN106669978B (en) * | 2015-11-11 | 2019-09-13 | 神华集团有限责任公司 | A kind of method that charcoal flotation agent and its application and flyash flotation mention charcoal |
| CN108043360A (en) * | 2017-12-12 | 2018-05-18 | 安徽宇瑞环保建设有限公司 | A kind of method that flyash is processed into magnetic active carbon powder |
| CN110605182A (en) * | 2019-10-25 | 2019-12-24 | 福建三钢闽光股份有限公司 | Blast furnace cloth belt dedusting ash flotation reagent and application method thereof |
| CN110697709A (en) * | 2019-11-13 | 2020-01-17 | 山东大学 | Porous carbon prepared from biomass unburned carbon and application of porous carbon in super capacitor |
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Application publication date: 20150401 |