CN103936048A - Method for recovering and utilizing sewage generated during technology process of acid method for extracting aluminum oxide from fly ash - Google Patents
Method for recovering and utilizing sewage generated during technology process of acid method for extracting aluminum oxide from fly ash Download PDFInfo
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- CN103936048A CN103936048A CN201310018071.XA CN201310018071A CN103936048A CN 103936048 A CN103936048 A CN 103936048A CN 201310018071 A CN201310018071 A CN 201310018071A CN 103936048 A CN103936048 A CN 103936048A
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Abstract
The invention discloses a method for recovering and utilizing sewage generated during the technology process of an acid method for extracting aluminum oxide from fly ash, and belongs to the technical field of joint recovery and utilization of aluminum-containing waste acid and solid wastes. The method utilizes the waste steel slag discharged during the steel making process to process the sewage generated during the technology process of an acid method for extracting aluminum oxide from fly ash, recycles aluminum oxide and iron oxide in the sewage, and consumes the acid solution in the sewage. The method comprises the following steps: adding waste steel slag into the sewage according to a certain solid/liquid ratio, wherein the sewage is measured in volume (mL), and the waste steel slag is measured in weight (g); controlling the operation temperature in a range of 50 to 100 DEG C, and the reaction time in a range of 1 to 3 hours; recovering the hydrogen gas generated during the reaction process, burning the hydrogen gas to provide a heat source for the reactions; and then subjecting the reaction product to processes of solid/liquid separation, joint impurity removing, crystallization, and burning so as to obtain solid aluminum oxide and solid iron oxide; wherein the filter slag generated in the solid/liquid separation process can be mixed with the waste steel slag according to a ratio of waste steel slag to filter slag of (1-10): 1, and thus circulation utilization is achieved. The method utilizes the waste steel slag generated during the steel making process to process sewage generated during the technology process of an acid method for extracting aluminum oxide from fly ash, processes wastes by using wastes, and achieves the joint treatment and resource recovery of liquid wastes and solid wastes.
Description
(1) technical field
The invention belongs to the recoverying and utilizing method that a kind of flyash acid system extracts aluminum oxide technology sewage, particularly the combined recovery of sewage and solid waste is utilized technical field.
(2) background technology
China is the country of thermal power generation maximum in the world, is also the country of flyash quantity discharged maximum, and in recent years, China's electric power industry development is rapid, and thermoelectricity generating total amount also increases sharply, thereby the quantity discharged of flyash is also increasing year by year.
Owing to containing higher Al in flyash
2o
3, content generally can reach 20%～40%, reaches as high as more than 50%, can replace bauxite to become a kind of well alumina resource, and the technology of therefore extracting aluminum oxide from flyash is got more and more to such an extent that pay close attention to and research.The method of China's treated coal ash mainly contains pickling process, alkali fusion.Wherein pickling process is comparatively flexible with respect to alkali fusion, and secondary residue is less, and easily realizes silicon in flyash and separate with the thorough of aluminium, iron, becomes flyash and extracts the hot fields of aluminum oxide research.But extract in alumina process and produce a large amount of aluminic acid liquid that contains at acid system, if direct discharge not only can cause the waste of resource, also can cause very large destruction to environment.
Waste steel slag is in Steel-making project, to discharge to obtain waste residue, and its output accounts for the 15-20% of coarse steel slag output.Nearly 200,000,000 tons of the every annual output steel of China at present, approximately 8,300 ten thousand tons of slag output are stored up more than 200,000,000 ton, untreated slag in addition for many years, take up an area nearly 300,000,000 mu.Storing up of slag, not only takies a large amount of arable lands, and contaminate environment simultaneously, so best outlet is exactly the comprehensive utilization of exploitation slag, turns waste into wealth.
Literature search shows, does not still openly utilize waste steel slag to carry out the recoverying and utilizing method of treated coal ash acid system extraction aluminum oxide technology sewage at present.
(3) summary of the invention
Object of the present invention is just for above-mentioned the deficiencies in the prior art, provides a kind of flyash acid system to extract the recoverying and utilizing method of aluminum oxide technology sewage.
The present invention utilizes the waste steel slag treated coal ash acid system of discharging in steelmaking process to extract the sewage that aluminum oxide produces, and reclaims wherein aluminum oxide and ferric oxide, and consumption acids solution.Its key is in the treatment of wastes with processes of wastes against one another, not only solve flyash acid system extract in alumina process, produce containing aluminium spent acid, fully utilized the waste steel slag producing in steelmaking process simultaneously, extract wherein rich in natural resources, reduce environmental pollution.
The technology of the present invention solution is:
Flyash acid system extracts aluminum oxide technology sewage recoverying and utilizing method and is achieved through the following technical solutions:
The waste steel slag of discharging in steelmaking process is joined to containing in aluminium sewage of flyash acid system extraction aluminum oxide generation, and reacting by heating, obtains the acid-respons in oxide compound and sewage in waste steel slag, generate corresponding vitriol and hydrogen, collects hydrogen and provides heat for reacting.After finishing, reaction through solid-liquid separation, associating removal of impurities, crystallization, calcining and other processes, obtains aluminum oxide and ferric oxide.Filter residue after solid-liquid separation is doped in waste steel slag by a certain percentage, makes full use of, and reduces the discharge of solid waste.
The steps include:
(1) raw material is prepared: in flyash acid system extraction aluminum oxide technology sewage, aluminium ion concentration is at 0.1-0.3mol/L, and sulfuric acid concentration is 1-20%;
(2) taking liquid-solid ratio as 20-5: 1 (sewage and waste steel slag ratio are taking mL: g as benchmark) joins waste steel slag in sewage, stirs, and joins in reactor;
(3) be to react 1-3h at 50-100 DEG C in temperature of reaction; And collect the gas that reaction produces, gas is used to reaction that thermal source is provided;
(4) reacted solution is filtered, associating removal of impurities, crystallization, obtain Tai-Ace S 150 and ferrum sulfuricum oxydatum solutum; Having the corresponding oxide that separates and be converted into of Tai-Ace S 150 and ferric sulfate is known technology, is not repeated.
The filter residue that filtration obtains is entrained in waste steel slag by a certain percentage, and doping ratio is 1-10: 1 (waste steel slag: filter residue) recycle.
(4) embodiment
Be described in further detail below in conjunction with actual example:
Example one
(1) raw material is prepared: in flyash acid system extraction aluminum oxide technology sewage, aluminium ion concentration is at 0.13mol/L, and sulfuric acid concentration is 6.7%;
(2) get above-mentioned sewage 100mL, waste steel slag 5g, joins waste steel slag in sewage, stirs, and joins in reactor;
(3) be to react 1h at 60 DEG C in temperature of reaction;
(4) reacted solution is filtered, associating removal of impurities, crystallization, obtain Tai-Ace S 150 and ferrum sulfuricum oxydatum solutum; Having the corresponding oxide that separates and be converted into of Tai-Ace S 150 and ferric sulfate is known technology, is not repeated.
Under this condition, in sewage, sulfuric acid concentration drops to below 0.5%, and the rate of recovery of aluminium reaches 85.0%, and the rate of recovery of iron reaches 82.9%.
Example two
(1) raw material is prepared: in flyash acid system extraction aluminum oxide technology sewage, aluminium ion concentration is at 0.21mol/L, and sulfuric acid concentration is 11.4%;
(2) get above-mentioned sewage 100mL, waste steel slag 10g, joins waste steel slag in sewage, stirs, and joins in reactor;
(3) be to react 1.5h at 70 DEG C in temperature of reaction;
(4) reacted solution is filtered, associating removal of impurities, crystallization, obtain Tai-Ace S 150 and ferrum sulfuricum oxydatum solutum; Having the corresponding oxide that separates and be converted into of Tai-Ace S 150 and ferric sulfate is known technology, is not repeated.
Under this condition, in sewage, sulfuric acid concentration drops to below 0.5%, and the rate of recovery of aluminium reaches 86.3%, and the rate of recovery of iron reaches 84.1%.
Example three
(1) raw material is prepared: in flyash acid system extraction aluminum oxide technology sewage, aluminium ion concentration is at 0.27mol/L, and sulfuric acid concentration is 16.3%;
(2) get above-mentioned sewage 100mL, waste steel slag 15g, joins waste steel slag in sewage, stirs, and joins in reactor;
(3) be to react 2.5h at 90 DEG C in temperature of reaction;
(4) reacted solution is filtered, associating removal of impurities, crystallization, obtain Tai-Ace S 150 and ferrum sulfuricum oxydatum solutum; Having the corresponding oxide that separates and be converted into of Tai-Ace S 150 and ferric sulfate is known technology, is not repeated.
Under this condition, in sewage, sulfuric acid concentration drops to below 0.5%, and the rate of recovery of aluminium reaches 90.4%, and the rate of recovery of iron reaches 87.3%.
Example four
(1) raw material is prepared: in flyash acid system extraction aluminum oxide technology sewage, aluminium ion concentration is at 0.27mol/L, and sulfuric acid concentration is 6.8%;
(2) get above-mentioned sewage 100mL, waste steel slag 15g, joins waste steel slag in sewage, stirs, and joins in reactor;
(3) be to react 2h at 70 DEG C in temperature of reaction;
(4) reacted solution is filtered, associating removal of impurities, crystallization, obtain Tai-Ace S 150 and ferrum sulfuricum oxydatum solutum; Having the corresponding oxide that separates and be converted into of Tai-Ace S 150 and ferric sulfate is known technology, is not repeated.
Under this condition, in sewage, sulfuric acid concentration drops to below 0.5%, and the rate of recovery of aluminium reaches 89.1%, and the rate of recovery of iron reaches 84.2%.
Example five
(1) raw material is prepared: in flyash acid system extraction aluminum oxide technology sewage, aluminium ion concentration is at 0.13mol/L, and sulfuric acid concentration is 6.7%; Filter residue in example three is doped in waste steel slag, and doping ratio is 5: 1 (waste steel slag: filter residue);
(2) get above-mentioned sewage 100mL, the mixing slag 5g of waste steel slag and filter residue, joins the mixing slag of waste steel slag and filter residue in sewage, stirs, and joins in reactor;
(3) be to react 1h at 60 DEG C in temperature of reaction;
(4) reacted solution is filtered, associating removal of impurities, crystallization, obtain Tai-Ace S 150 and ferrum sulfuricum oxydatum solutum; Having the corresponding oxide that separates and be converted into of Tai-Ace S 150 and ferric sulfate is known technology, is not repeated.
Under this condition, in sewage, sulfuric acid concentration drops to below 0.5%, and the rate of recovery of aluminium reaches 84.5%, and the rate of recovery of iron reaches 81.9%.
Example six
(1) raw material is prepared: in flyash acid system extraction aluminum oxide technology sewage, aluminium ion concentration is at 0.13mol/L, and sulfuric acid concentration is 6.7%; Filter residue in example three is doped in waste steel slag, and doping ratio is 1: 1 (waste steel slag: filter residue);
(2) get above-mentioned sewage 100mL, the mixing slag 5g of waste steel slag and filter residue, joins the mixing slag of waste steel slag and filter residue in sewage, stirs, and joins in reactor;
(3) be to react 1h at 60 DEG C in temperature of reaction;
(4) reacted solution is filtered, associating removal of impurities, crystallization, obtain Tai-Ace S 150 and ferrum sulfuricum oxydatum solutum; Having the corresponding oxide that separates and be converted into of Tai-Ace S 150 and ferric sulfate is known technology, is not repeated.
Under this condition, in sewage, sulfuric acid concentration drops to below 1%, and the rate of recovery of aluminium reaches 82.4%, and the rate of recovery of iron reaches 80.1%.
Claims (9)
1. flyash acid system extracts an aluminum oxide technology sewage recoverying and utilizing method, it is characterized in that, utilizes the waste steel slag treated coal ash acid system of discharging in steelmaking process to extract the sewage that aluminum oxide produces, and reclaims wherein aluminum oxide and ferric oxide, and consumption acids solution.
2. extract aluminum oxide technology sewage recoverying and utilizing method according to flyash acid system claimed in claim 1, it is characterized in that, comprise following order and step:
Step 1, taking liquid-solid ratio as 20-5: 1 (sewage and waste steel slag ratio are taking mL: g as benchmark) joins waste steel slag in sewage, stirs, and joins in reactor;
Step 2, react for some time at a certain temperature;
Step 3, by reacted solution filter, associating removal of impurities, crystallization, obtain Tai-Ace S 150 and ferrum sulfuricum oxydatum solutum; Having the corresponding oxide that separates and be converted into of Tai-Ace S 150 and ferric sulfate is known technology, is not repeated.
3. flyash acid system extracts aluminum oxide technology sewage recoverying and utilizing method according to claim 2, its feature in step 1 reactor with airway and gas extractor.
4. flyash acid system extracts aluminum oxide technology sewage recoverying and utilizing method according to claim 2, its feature in step 1 in sewage aluminium ion concentration at 0.1-0.3mol/L.
5. flyash acid system extracts aluminum oxide technology sewage recoverying and utilizing method according to claim 2, and its feature sulfuric acid concentration in step 1 is 1-20%.
6. flyash acid system extracts aluminum oxide technology sewage recoverying and utilizing method according to claim 2, and its feature temperature of reaction in step 2 is 50-100 DEG C, and the reaction times is 1-3h.
7. flyash acid system extracts aluminum oxide technology sewage recoverying and utilizing method according to claim 2, and its feature is filtered the filter residue obtaining and is entrained in by a certain percentage in waste steel slag in step 3, recycle.
8. flyash acid system extracts aluminum oxide technology sewage recoverying and utilizing method according to claim 3, it is characterized in that, the hydrogen of collection is used to the reaction in claim 2 that thermal source is provided.
9. flyash acid system extracts aluminum oxide technology sewage recoverying and utilizing method according to claim 7, it is characterized in that, the ratio of its doping is 1-10: 1 (waste steel slag: filter residue).
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| CN201310018071.XA CN103936048B (en) | 2013-01-18 | 2013-01-18 | A kind of recoverying and utilizing method of flyash acidity extraction aluminum oxide technology sewage |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753026A (en) * | 2016-04-11 | 2016-07-13 | 北京世纪地和控股有限公司 | Method for recycling aluminum oxide from coal ash |
| CN106379947A (en) * | 2016-08-31 | 2017-02-08 | 江苏荣生电子有限公司 | Technology for extracting ferric sulfate in waste acid liquor from corrosion of electrode foils |
| CN109336147A (en) * | 2018-10-25 | 2019-02-15 | 昆明理工大学 | A kind of method of the salic Industrial Solid Waste production aluminium oxide of richness |
| CN109835930A (en) * | 2019-02-19 | 2019-06-04 | 昆明理工大学 | A kind of production method of aluminium oxide |
| CN113332965A (en) * | 2021-07-12 | 2021-09-03 | 新疆大学 | Magnetic fly ash @ PDMS sponge material for oil-water separation and preparation method thereof |
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| CN1672821A (en) * | 2005-04-08 | 2005-09-28 | 张彭成 | Compound treating method of waste industrial sulfuric acid and flyash |
| CN102101688A (en) * | 2010-12-23 | 2011-06-22 | 内蒙古昶泰资源循环再生利用科技开发有限责任公司 | Technological method for producing industrial aluminum sulfate by using coal ash and comprehensively utilizing coal ash |
| CN102241410A (en) * | 2010-05-14 | 2011-11-16 | 东北大学 | Ecological synthetic utilization method of fly ash |
| CN102502735A (en) * | 2011-11-03 | 2012-06-20 | 沈阳铝镁设计研究院有限公司 | Method for producing alumina by using pulverized fuel ash |
| CN102690010A (en) * | 2011-03-24 | 2012-09-26 | 镇江市丹徒区江南热镀锌有限公司 | Resource integrated utilization and treatment method of hydrochloric acid pickling waste liquid |
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2013
- 2013-01-18 CN CN201310018071.XA patent/CN103936048B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1672821A (en) * | 2005-04-08 | 2005-09-28 | 张彭成 | Compound treating method of waste industrial sulfuric acid and flyash |
| CN102241410A (en) * | 2010-05-14 | 2011-11-16 | 东北大学 | Ecological synthetic utilization method of fly ash |
| CN102101688A (en) * | 2010-12-23 | 2011-06-22 | 内蒙古昶泰资源循环再生利用科技开发有限责任公司 | Technological method for producing industrial aluminum sulfate by using coal ash and comprehensively utilizing coal ash |
| CN102690010A (en) * | 2011-03-24 | 2012-09-26 | 镇江市丹徒区江南热镀锌有限公司 | Resource integrated utilization and treatment method of hydrochloric acid pickling waste liquid |
| CN102502735A (en) * | 2011-11-03 | 2012-06-20 | 沈阳铝镁设计研究院有限公司 | Method for producing alumina by using pulverized fuel ash |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753026A (en) * | 2016-04-11 | 2016-07-13 | 北京世纪地和控股有限公司 | Method for recycling aluminum oxide from coal ash |
| CN106379947A (en) * | 2016-08-31 | 2017-02-08 | 江苏荣生电子有限公司 | Technology for extracting ferric sulfate in waste acid liquor from corrosion of electrode foils |
| CN109336147A (en) * | 2018-10-25 | 2019-02-15 | 昆明理工大学 | A kind of method of the salic Industrial Solid Waste production aluminium oxide of richness |
| CN109336147B (en) * | 2018-10-25 | 2021-01-12 | 昆明理工大学 | Method for producing alumina by using industrial solid waste rich in alumina |
| CN109835930A (en) * | 2019-02-19 | 2019-06-04 | 昆明理工大学 | A kind of production method of aluminium oxide |
| CN113332965A (en) * | 2021-07-12 | 2021-09-03 | 新疆大学 | Magnetic fly ash @ PDMS sponge material for oil-water separation and preparation method thereof |
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