CN103172094A - Method for using waste aluminum ash and waste acid without causing pollution to environment - Google Patents

Method for using waste aluminum ash and waste acid without causing pollution to environment Download PDF

Info

Publication number
CN103172094A
CN103172094A CN2013100875437A CN201310087543A CN103172094A CN 103172094 A CN103172094 A CN 103172094A CN 2013100875437 A CN2013100875437 A CN 2013100875437A CN 201310087543 A CN201310087543 A CN 201310087543A CN 103172094 A CN103172094 A CN 103172094A
Authority
CN
China
Prior art keywords
spent acid
ash
aluminium
waste
filtrate
Prior art date
Application number
CN2013100875437A
Other languages
Chinese (zh)
Inventor
陈梅兰
陈玲皓
钱莹莹
周建伟
Original Assignee
浙江树人大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 浙江树人大学 filed Critical 浙江树人大学
Priority to CN2013100875437A priority Critical patent/CN103172094A/en
Publication of CN103172094A publication Critical patent/CN103172094A/en

Links

Abstract

The invention discloses a method for using waste aluminum ash and waste acid without causing pollution to environment. The method comprises the following steps of: (1) preparing the 10-30% waste acid: (2) taking the waste aluminum ash, slowly adding the waste aluminum ash into the waste acid prepared in the step (1), and heating the waste acid in a water bath at the temperature of 80 DEG C for 3 hours while stirring slowly, wherein the solid-liquid volume ratio of the waste aluminum ash to the waste acid is 1-5; (3) carrying out reaction, and filtering while the product of reaction is hot to obtain a filter residue and a filtrate; and (4) adjusting the pH value of the filtrate to 12 by using an excess amount of NaOH, and standing for filtration to obtain an iron-containing filter residue and an aluminum-containing filtrate, washing NaOH precipitates repeatedly, drying, and calcining at a high temperature to obtain a NaOH product. Due to the adoption of the method, the wastes can be treated, and the waste of resources can be avoided. The method conforms to the concept of the circular economy and the concept of energy conservation and emission reduction.

Description

Environmental protection utilizes the method for aluminium scrap lime-ash and spent acid
Technical field
The present invention utilizes the aluminium lime-ash different with the solubility rate of spent acid under different acidity, solid-to-liquid ratio, temperature condition, through repetition test repeatedly, and the highest technique of digesting efficiency of alumina that draws.This invention is through the processes such as a series of dissolving, filtration, ignition of precipitate, the highly purified aluminum oxide of output and iron oxide pigment.
Background technology
The higher flyash of aluminum content that produces at the boiler that reclaims metallic aluminium and smelt the aluminium lime-ash that produces and various fire coals at present all carries out waste treatment, not only occupies the forest land, contaminate environment, and the resource that contains in a large number aluminium is wasted.And iron and steel surface cleaning factory common acid leaching method is removed the iron rust on top layer, acid solution do not have cleanup action after concentration drops to a certain degree after is processed as spent acid, this spent acid solution contains a large amount of iron ions, present processing is mainly also by methods such as neutralization precipitations, not only waste resource, and produce a large amount of body refuses.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of method that environmental protection utilizes aluminium scrap lime-ash and spent acid, step is as follows:
1) mass percent concentration of preparation spent acid is 10 ~ 30%;
2) get aluminium scrap ash ground-slag, slowly join the spent acid of preparing in step 1), 80 ℃ of heating in water bath 3 hours slowly stirred between heating period; Described aluminium scrap ash ground-slag: spent acid, solid-liquid volume ratio are 1 ~ 5;
3) filter while hot after having reacted, obtain filter residue and filtrate;
4) with excessive NaOH, the pH of filtrate is transferred to 12, standing suction filtration obtains the iron content filter residue and contains aluminium filtrate, after iron content filter residue calcination washing ferric oxide;
5) will contain aluminium filtrate and transfer pH to 7 ~ 8 with concentrated hydrochloric acid, standing 1 hour, filter, obtain aluminum hydroxide precipitation, this aluminum hydroxide precipitation is rinsed repeatedly, obtain alumina product after the oven dry high-temperature calcination.
Spent acid in described step 1) is the spent acid (iron and steel surface cleaning factory common acid leaching method is removed the iron rust on top layer, and the acid solution do not have cleanup action after concentration drops to a certain degree after is processed as spent acid) after iron and steel cleans.
Described step 2) aluminium scrap in ash ground-slag is aluminium casting mold factory waste aluminium ash, and containing aluminium element content is 15%~35%, the silver gray fine powder.
The mass percent concentration of the spent acid described 1) is 20%, described step 2) middle aluminium scrap ash ground-slag: spent acid solid-liquid volume ratio is 1:4.
Filter residue main component in described step 3) is silicon-dioxide, as refractory brick material, cement or pavior.
Red iron oxide in described step 4) is as pigment.
Beneficial effect of the present invention: the present invention has not only processed waste and has also avoided the waste of resource, and meets the theory of recycling economy and energy-saving and emission-reduction.
Description of drawings
Fig. 1 is the method flow diagram that environmental protection utilizes aluminium scrap lime-ash and spent acid.
Fig. 2 is alumina product.
Fig. 3 is ferric oxide red colorant.
Embodiment
The present invention is described further below in conjunction with the drawings and specific embodiments.The present invention is directed in aluminium scrap ash ground-slag or flyash aluminium and compounds content thereof higher, clean acid-spending strength from iron and steel and be about 5%~8%, contain simultaneously a large amount of iron ions.Utilize two kinds of waste materials can produce two kinds of industrial chemicals ferric oxide and aluminum oxide, turn waste into wealth.Not high enough because of acid-spending strength, add a small amount of hydrochloric acid in experiment, dissolving aluminium scrap ash, wherein aluminum oxide is extracted, and aluminium and compound thereof are transformed into aluminium salt, cross to filter to remove filter residue, filtrate adds alkali to be made aluminium be transformed into meta-aluminate to enter solution, and the iron in spent acid becomes Fe (OH) 2Precipitation, after secondary filtration, filtrate acid adding adjust pH becomes Al (OH) 3The calcination after washing of Precipitation, precipitation gets pure Al 2O 3Precipitation Fe after secondary filtration (OH) 2Get croci through calcination, this powder can be done ferric oxide red colorant, and concrete technological line schema is seen Fig. 1.
Embodiment 1
Concrete steps are as follows:
One, 15% acid solution
1, the spent acid of getting 50ml adds the 30ml concentrated hydrochloric acid, is mixed with acidity and is 15% acid solution.
2, get 2g aluminium scrap ash ground-slag, add than slowly the acid solution of preparing in 1 by the 1:4 solid waste, 80 ℃ of heating in water bath 2h,, slowly stir between heating period.
3, filter while hot, filter residue is as materials such as refractory brick, and filtrate mensuration finds that the aluminium solubility rate is 65 ~ 70%.
4, the pH with filtrate transfers to 12 left and right, standing filtration, and filter residue is mainly ferrous hydroxide, gets the ferric oxide (see figure 3) after filter residue calcination washing, is used for doing pigment.Filtrate is carried out next step operation.
5, filtrate is transferred pH to 7 ~ 8, and standing 1h filters, and obtains aluminum hydroxide precipitation, and this precipitation is rinsed repeatedly, can obtain the alumina product (see figure 2) after oven dry.
Embodiment 2
Concrete steps are as follows:
One, 20% acid solution
1, the spent acid of getting 50ml adds appropriate industrial concentrated hydrochloric acid, is mixed with acidity and is 20% acid solution.
2, get 2g aluminium scrap ash ground-slag, add than slowly the acid solution of preparing in 1 by the 1:4 solid waste, 80 ℃ of heating in water bath 2h,, slowly stir between heating period.
3, filter while hot, filter residue is as materials such as refractory brick, and filtrate mensuration finds that the aluminium solubility rate is 70 ~ 75%.
4, the pH with filtrate transfers to 12 left and right, standing filtration, and filter residue is mainly ferrous hydroxide, gets ferric oxide after filter residue calcination washing, is used for doing pigment.Filtrate is carried out next step operation.
5, filtrate is transferred pH to 7 ~ 8, and standing 1h filters, and obtains aluminum hydroxide precipitation, and this precipitation is rinsed repeatedly, can obtain alumina product after oven dry.
Embodiment 3
Concrete steps are as follows:
One, 25% acid solution
1, the spent acid of getting 50ml adds 30ml industry concentrated hydrochloric acid, is mixed with acidity and is 25% acid solution.
2, get 2g aluminium scrap ash ground-slag, add than slowly the acid solution of preparing in 1 by the 1:4 solid waste, 80 ℃ of heating in water bath 2h slowly stirred between heating period.
3, filter while hot, filter residue is as materials such as refractory brick, and filtrate mensuration finds that the aluminium solubility rate is 70 ~ 75%.
4, the pH with filtrate transfers to 12 left and right, standing filtration, and filter residue is mainly ferrous hydroxide, gets ferric oxide after filter residue calcination washing, is used for doing pigment.Filtrate is carried out next step operation.
5, filtrate is transferred pH to 7 ~ 8, and standing 1h filters, and obtains aluminum hydroxide precipitation, and this precipitation is rinsed repeatedly, can obtain alumina product after oven dry.
Our technique mainly adopt for pickling process, the filter residue after acidleach is as heat-stable material, littlely even can avoid further deslagging.Be mainly spent acid with acid in this technique, thereby lowered production cost, this technological operation simultaneously is simple, is applicable to industrial mass production.

Claims (6)

1. an environmental protection utilizes the method for aluminium scrap lime-ash and spent acid, it is characterized in that, its step is as follows:
1) mass percent concentration of preparation spent acid is 10 ~ 30%;
2) get aluminium scrap ash ground-slag, slowly join the spent acid of preparing in step 1), 80 ℃ of heating in water bath 3 hours slowly stirred between heating period; Described aluminium scrap ash ground-slag: spent acid, solid-liquid volume ratio are 1 ~ 5;
3) filter while hot after having reacted, obtain filter residue and filtrate;
4) with excessive NaOH, the pH of filtrate is transferred to 12, standing suction filtration obtains the iron content filter residue and contains aluminium filtrate, after iron content filter residue calcination washing ferric oxide;
5) will contain aluminium filtrate and transfer pH to 7 ~ 8 with concentrated hydrochloric acid, standing 1 hour, filter, obtain aluminum hydroxide precipitation, this aluminum hydroxide precipitation is rinsed repeatedly, obtain alumina product after the oven dry high-temperature calcination.
2. environmental protection as claimed in claim 1 utilizes the method for aluminium scrap lime-ash and spent acid, it is characterized in that, the spent acid in described step 1) is the spent acid after iron and steel cleans.
3. environmental protection as claimed in claim 1 utilizes the method for aluminium scrap lime-ash and spent acid, it is characterized in that described step 2) in aluminium scrap ash ground-slag be aluminium casting mold factory waste aluminium ash, containing aluminium element content is 15%~35% ,The silver gray fine powder.
4. environmental protection as claimed in claim 1 utilizes the method for aluminium scrap lime-ash and spent acid, it is characterized in that described 1) in the mass percent concentration of spent acid be 20%; Described step 2) aluminium scrap ash ground-slag in: spent acid solid-liquid volume ratio is 1:4.
5. environmental protection as claimed in claim 1 utilizes the method for aluminium scrap lime-ash and spent acid, it is characterized in that, the filter residue main component in described step 3) is silicon-dioxide, as refractory brick material, cement or pavior.
6. environmental protection as claimed in claim 1 utilizes the method for aluminium scrap lime-ash and spent acid, it is characterized in that, the red iron oxide in described step 4) is as pigment.
CN2013100875437A 2013-03-19 2013-03-19 Method for using waste aluminum ash and waste acid without causing pollution to environment CN103172094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013100875437A CN103172094A (en) 2013-03-19 2013-03-19 Method for using waste aluminum ash and waste acid without causing pollution to environment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013100875437A CN103172094A (en) 2013-03-19 2013-03-19 Method for using waste aluminum ash and waste acid without causing pollution to environment

Publications (1)

Publication Number Publication Date
CN103172094A true CN103172094A (en) 2013-06-26

Family

ID=48632375

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013100875437A CN103172094A (en) 2013-03-19 2013-03-19 Method for using waste aluminum ash and waste acid without causing pollution to environment

Country Status (1)

Country Link
CN (1) CN103172094A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103435079A (en) * 2013-09-04 2013-12-11 化工部长沙设计研究院 Technology for producing aluminium oxide by decomposing mineral containing aluminosilicate at low temperature
CN104828915A (en) * 2015-04-14 2015-08-12 贺州学院 Method for synthesizing polyaluminum sulfate chloride water purifier by using aluminum foil corrosion waste acid and waste aluminum
CN106478020A (en) * 2016-10-10 2017-03-08 浙江师范大学 A kind of use waste aluminium lime-ash prepares non-burning brick method
CN106694514A (en) * 2016-12-05 2017-05-24 三门峡华森新型材料商贸有限公司 Resourceful treatment method for aluminum ash
CN106745130A (en) * 2017-01-11 2017-05-31 西北农林科技大学 A kind of method that aluminium lime-ash prepares aluminum oxide
CN106830025A (en) * 2017-02-24 2017-06-13 南通大学 aluminium ash recycling method
CN106865586A (en) * 2017-02-24 2017-06-20 西北农林科技大学 A kind of method for preparing alumina type aeroge
CN106892441A (en) * 2017-02-24 2017-06-27 南通大学 Aluminium ash Application way
CN109987639A (en) * 2019-03-22 2019-07-09 昆明理工大学 A kind of method that aluminium strengthens red mud dealkalization and separates and recovers aluminium, iron
CN110436498A (en) * 2019-08-09 2019-11-12 湖北新金洋资源股份公司 The method of high purity aluminium oxide is recycled in a kind of Quadratic aluminum dust of secondary aluminium melting end

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5719343A (en) * 1980-07-07 1982-02-01 Ryozo Kondo Wet process separating and purifying method of metallic aluminum and aluminum oxide from aluminum ash
CN1673084A (en) * 2004-12-03 2005-09-28 潘坤涛 Process of producing alumina with waste aluminium ash
CN1927718A (en) * 2006-10-12 2007-03-14 上海上大珊尔环保科技有限公司 Method of preparing sodium aluminate from waste aluminium ash
CN101734698A (en) * 2009-09-08 2010-06-16 东北大学 Method for preparing aluminum oxide from aluminiferous material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5719343A (en) * 1980-07-07 1982-02-01 Ryozo Kondo Wet process separating and purifying method of metallic aluminum and aluminum oxide from aluminum ash
CN1673084A (en) * 2004-12-03 2005-09-28 潘坤涛 Process of producing alumina with waste aluminium ash
CN1927718A (en) * 2006-10-12 2007-03-14 上海上大珊尔环保科技有限公司 Method of preparing sodium aluminate from waste aluminium ash
CN101734698A (en) * 2009-09-08 2010-06-16 东北大学 Method for preparing aluminum oxide from aluminiferous material

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Α.Α.阿格兰诺夫斯基等: "《氧化铝生产手册》", 28 February 1974, 北京市:冶金工业出版社 *
邹海平等: ""利用"三废"制备氧化铁的研究进展"", 《化工进展》 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103435079A (en) * 2013-09-04 2013-12-11 化工部长沙设计研究院 Technology for producing aluminium oxide by decomposing mineral containing aluminosilicate at low temperature
CN103435079B (en) * 2013-09-04 2015-03-18 化工部长沙设计研究院 Technology for producing aluminium oxide by decomposing mineral containing aluminosilicate at low temperature
CN104828915A (en) * 2015-04-14 2015-08-12 贺州学院 Method for synthesizing polyaluminum sulfate chloride water purifier by using aluminum foil corrosion waste acid and waste aluminum
CN106478020A (en) * 2016-10-10 2017-03-08 浙江师范大学 A kind of use waste aluminium lime-ash prepares non-burning brick method
CN106694514A (en) * 2016-12-05 2017-05-24 三门峡华森新型材料商贸有限公司 Resourceful treatment method for aluminum ash
CN106694514B (en) * 2016-12-05 2019-01-29 三门峡华森新型材料商贸有限公司 A kind of aluminium ash recycling processing method
CN106745130A (en) * 2017-01-11 2017-05-31 西北农林科技大学 A kind of method that aluminium lime-ash prepares aluminum oxide
CN106865586A (en) * 2017-02-24 2017-06-20 西北农林科技大学 A kind of method for preparing alumina type aeroge
CN106892441A (en) * 2017-02-24 2017-06-27 南通大学 Aluminium ash Application way
CN106830025B (en) * 2017-02-24 2018-06-19 南通大学 aluminium ash recycling method
CN106865586B (en) * 2017-02-24 2018-07-06 西北农林科技大学 A kind of method for preparing alumina type aeroge
CN106830025A (en) * 2017-02-24 2017-06-13 南通大学 aluminium ash recycling method
CN109987639A (en) * 2019-03-22 2019-07-09 昆明理工大学 A kind of method that aluminium strengthens red mud dealkalization and separates and recovers aluminium, iron
CN110436498A (en) * 2019-08-09 2019-11-12 湖北新金洋资源股份公司 The method of high purity aluminium oxide is recycled in a kind of Quadratic aluminum dust of secondary aluminium melting end

Similar Documents

Publication Publication Date Title
CN101643243B (en) Method for recycling copper, nickel, chromium, zinc and iron from plating sludge
CN100572279C (en) A kind of method of alumina of from flyash, extracting
CN101550585B (en) Method for producing dehydrated calcium sulfate whisker
Wang et al. Recovery of alkali and alumina from bauxite residue (red mud) and complete reuse of the treated residue
CN102698737B (en) Method for preparing selective catalytic reduction SCR flue gas denitration catalyst and method for preparing raw material titanium-tungsten powder of SCR flue gas denitration catalyst
CN104310647B (en) Recycling method for treating stainless steel pickling acid pickle and wastewater
CN102747226B (en) Method for treating zinc hydrometallurgy waste residue by using alkali ammonium sulfur coupling method
CN100413981C (en) Method of acid extracting aluminium from high-silicon alumina-containing raw mineral materials
CN103397213B (en) Method for decomposing and extracting Baotou rare earth ore through mixed alkali roasting process
CN105271327B (en) A kind of aluminum ash harmless treatment the method for recycling
CN102031381B (en) Process for preparing sodium pyroantimonate from arsenic- and stibium-containing smoke ash
CN102586610B (en) Cleaner production process for synchronously extracting vanadium and aluminum from aluminothermic vanadium iron slag
CN103526031A (en) Recovery method for SCR waste flue gas denitration catalyst
CN101817650A (en) Method for treating incinerated fly ash of domestic garbage with cooperation of cement kiln
CN103723765A (en) Method for preparing titanium dioxide through sulfuric acid method
CN100491247C (en) Method for producing silicon dioxide and alumina by using fly ash
CN101816829B (en) Chromium residue detoxifying process
Yang et al. Leaching of vanadium from chromium residue
CN103950991B (en) Waste acid and wastewater treatment process in processes of pickling and purifying quartz or feldspar
CN102127654B (en) Method for decomposing chromium-containing vanadium slag by using sodium hydroxide molten salt
CN103342375B (en) The method of aluminum oxide, silicon-dioxide and other metal ingredient is reclaimed from flyash
CN103073067B (en) A kind of method utilizing spent pickle liquor to produce iron(ic) chloride
CN106521160B (en) A kind of vanadium extraction from discarded SCR catalyst and the method for preparing activation titanium silicon tungsten powder
CN100532268C (en) Production method of oxygen-containing beta aluminum fluoride for aluminum electrolysis bath by using aluminum scruff ash
CN101538652B (en) Method for separating and recovering vanadium and chrome from vanadium and chrome-containing waste

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130626