CN107043132B - Building waste method of comprehensive utilization - Google Patents
Building waste method of comprehensive utilization Download PDFInfo
- Publication number
- CN107043132B CN107043132B CN201710219237.2A CN201710219237A CN107043132B CN 107043132 B CN107043132 B CN 107043132B CN 201710219237 A CN201710219237 A CN 201710219237A CN 107043132 B CN107043132 B CN 107043132B
- Authority
- CN
- China
- Prior art keywords
- filtrate
- building waste
- filter residue
- hydrochloric acid
- solid
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/24—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/34—Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention discloses a kind of building waste method of comprehensive utilization, comprising the following steps: a crushes building waste, then with mixed in hydrochloric acid, boils reaction 0.5-3 hours, filtrate one and filter residue one is obtained by filtration；The calcium hydroxide emulsion tune pH value to 4 of filtrate one is filtered to isolate iron hydroxide by b, then proceedes to filter to isolate aluminium hydroxide, filtrate is evaporated, and obtains calcium chloride or CALCIUM CHLORIDE DIHYDRATE with calcium hydroxide emulsion tune pH value to 7；C is evaporated filter residue one and fluosilicic acid hybrid reaction to obtain volatilization gas and solid, and volatilization gas obtains white carbon black after absorbing, and solid plus water are ground, adds after hydrochloric acid boils and filters, obtain filtrate four and filter residue two；D with calcium hydroxide emulsion tune pH to 2, then mixes filtrate four with filtrate one.The present invention is to decompose using building waste as raw material by cryochemistry, and a series of chemical products such as output water and silica, aluminium hydroxide, iron hydroxide, calcium chloride, being truly realized turns waste into wealth.
Description
Technical field
The present invention relates to a kind of building wastes to comprehensively utilize new method, belongs to construction refuse regenerated using field.
Background technique
Building waste refers to the discarded object of power boiler discharge generated in the construction, maintenance, demolishing process of building, main to wrap
Include the wastes such as waste concrete block, useless brickbat slag.With the continuous quickening of Chinese national economy and urbanization process, according to statistics, often
It constructs 10000 square metres and builds, it will the building waste for generating 500~600 tons, according to 2,000,000,000 squares of the annual construction scope in China
Rice calculates, and building waste caused by construction is often only just more than 100,000,000 tons by China, and building castoff has become raw after city
The second largest solid waste after rubbish living.These building waste overwhelming majority are dropped without any disposition, to soil, ring
Border, underground water, air etc. bring serious harm.
It is estimated that the volume of cargo in storage over the years of China's municipal refuse is up to more than 60 hundred million tons, wherein building castoff just account for 30%~
40%；Rubbish stores up appropriation of land area up to 500,000,000 m2, from Tangshan Earthquake to Wenchuan earthquake, a large amount of building waste always is
Disaster area rebuilds one of the matter of utmost importance for needing to solve, these building wastes are not if handled, and disaster area is just without land resource for weight
It builds, with regard to none good environment for resident's inhabitation, how disaster area resident disposes and utilize building with regard to homeless
Rubbish has become one of the major issue of whole society's care.
Develop the regeneration early start of building waste in Europe, by discarded regenerative bone material by concrete for high speed public affairs
The Practical Project on road.Construction refuse resource has become the common research topic of developed country.The industry such as the U.S., Germany, Japan
Long-term effort is passed through by developed country, realizes the recycling of building waste substantially.
Since China's economy is lagged in industrially developed country, infrastructure also accordingly falls behind, and people are to building waste processing
Mode, based on filling, the regeneration of building waste is at the early-stage for most of selection.Current regeneration side both domestic and external
Method is that simple physical method makes its regeneration mostly, and key factor is two kinds, and one is utilizing building waste to produce brick, another kind is
Recycled aggregate is produced, is added in new concrete.
China at present have part construction unit using construction refuse regenerated products application the masonry of low level, plastering,
In the engineerings such as bed course, but construction refuse resource degree is well below developed countries.A large amount of building waste resource does not have
It is utilized effectively, not only wastes resource, but also polluted environment.This also illustrates from another point of view, China's building waste resource
The potentiality for changing comprehensive utilization are very big.
To sum up, existing building waste processing mode both at home and abroad is summarized, all without departing from the range of physical method processing, most
More, widest approach is to prepare recycled aggregate, renewable building material by a series of physical method (sorting is crushed), so
And these methods are mayed be done once because building waste performance after such processing is mostly declined, when these again
Raw building materials become building waste again, then, will they what course to follow?
Summary of the invention
Based on above-mentioned technical problem, the present invention provides a kind of building waste comprehensive utilization new method.
The adopted technical solution is that:
A kind of building waste comprehensive utilization new method, comprising the following steps:
A crushes building waste, then with mixed in hydrochloric acid, boils reaction 0.5-3 hours, filters, obtain after the reaction was completed
Filtrate one and filter residue one；
The calcium hydroxide emulsion tune pH value to 4 of filtrate one is filtered to isolate red-brown precipitation iron hydroxide and filtrate by b
Two, then proceed to that the pH value of filtrate two is transferred to 7 with calcium hydroxide emulsion, filter to isolate white flock precipitate aluminium hydroxide and
Filtrate three, then filtrate three is evaporated, obtain white solid calcium chloride or CALCIUM CHLORIDE DIHYDRATE；
Filter residue one and fluosilicic acid hybrid reaction are evaporated to obtain containing SiF by c4Volatilization gas and solid, contain SiF4's
Volatilization gas obtains white carbon black and absorbing liquid after water absorbs, and adds water to grind the solid generated after silicic acid hybrid reaction, then plus
Enter after hydrochloric acid boils and filter, obtains filtrate four and filter residue two；
D with calcium hydroxide emulsion tune pH to 2, then mixes filtrate four with filtrate one in return step a；Filter residue two returns
It is mixed into step a with the building waste of crushing or filter residue one.
Preferably, in step a: the building waste is that waste concrete block and/or useless brickbat slag, building waste are crushed to
- 200 mesh of 100 mesh.
Preferably, in step a: the concentration of the hydrochloric acid is 1mol/L-8mol/L, and the mass ratio of building waste and hydrochloric acid is
1:2-1:8。
Preferably, the mass percent concentration of the calcium hydroxide emulsion is 2%-20%.
Preferably, in step c: the mass percent concentration of the fluosilicic acid is 20%-40%, filter residue one and fluosilicic acid
Mass ratio is 1:4-1:8.
Preferably, in step c: the reaction temperature is the at a temperature of oil bath heating at 108-150 DEG C.
Preferably, in step c: the concentration of the hydrochloric acid is 2mol/L, and the mass ratio of solid and hydrochloric acid is 1:1-1:5.
In above-mentioned steps b, it is CaCl that filtrate three is evaporated to obtain within the temperature range of 200 DEG C to 240 DEG C2·2H2O,
Being evaporated to obtain within the temperature range of 260 DEG C to 300 DEG C is CaCl2。
The method have the benefit that:
The present invention is to decompose using building waste as raw material by cryochemistry, output water and silica, aluminium hydroxide,
A series of chemical products such as iron hydroxide, calcium chloride not only solve the problems, such as that building waste is nowhere stacked, handles difficulty, also
Resource can be brought to society, brings benefit, and being truly realized turns waste into wealth.The present invention will push a kind of brand-new once promoting
Construction refuse resource utilize the generation of maximized management mode to realize to realize the sustainable development of building trade
The coordinated development of economy, society, resource, environment.From this day, building waste cannot be referred to as with " rubbish ", and rubbish also will
As a kind of resource.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Specific embodiment
To account for, the concrete of specific gravity is raw materials for production to the present invention greatly absolutely in building waste, at a series of chemical method
Reason, after being overregulated the processing steps such as pH value, separation, purification, produces aluminium hydroxide, calcium chloride, white carbon black, iron hydroxide
The new method of equal industrial chemicals can provide the approach to turn waste into wealth for the building waste in national especially earthquake calamity area, not only
Eliminate many hazards of building waste, moreover it is possible to promote socio-economic development, realize that economy and the coordination of environment, society, resource are sent out
Exhibition.
The present invention is further explained in the light of specific embodiments:
Embodiment 1
The concrete sample 5g for being crushed to 200 mesh is taken, is added in 250ml beaker, with 1:1HCl (1 volume concentrated hydrochloric acid and 1
Volume of water mixes obtained hydrochloric acid, and concentration is about 6mol/L) 20ml, mixing, which is boiled, stirs 1 hour, and filtering obtains filtrate one
With filter residue one, resolution ratio 29%.
Water dissolves the Ca (OH) that filtered filtrate one is 5% with mass percent concentration2Lotion tune pH to 4, filtering point
Red-brown precipitation iron hydroxide is separated out, is continued 5%Ca (OH)2Lotion tune pH is transferred to 7, filters to isolate white flock precipitate hydrogen-oxygen
Change aluminium, filtrate is evaporated at 300 DEG C then, obtains the very strong white solid calcium chloride of water imbibition.
Water dissolves filtered filter residue one, and adding mass percent concentration is 35% fluosilicic acid 6ml, in 150 degree of temperature
Lower oil bath is evaporated, total resolution ratio 75%, the gas to be volatilized, is absorbed gas with water and is obtained white carbon black and absorbing liquid, absorbing liquid
Recycling can continue with repeatedly.The gas of volatilization mainly contains SiF4, Patent No. 201310534326.8 can also be used
Method disclosed in patent of invention is handled, and nano hydrated silica is made.
By the solid after being evaporated add 5 times amount water grinding, then plus 10ml 2mol/L hydrochloric acid boil after filter, obtain filtrate
It is repeatedly sharp to isolate indissoluble solid time reaction kettle by the calcium hydroxide emulsion tune pH to 2 for being 5% with mass percent concentration
With.And filtrate is isolated ferric hydroxide precipitate, will obtain filtrate, continued to be arrived with calcium hydroxide tune pH with calcium hydroxide tune pH to 4
7, aluminum hydroxide precipitation is isolated, liquid continues to produce calcium chloride.
Embodiment 2
In enamel reaction still, the hydrochloric acid 2m of 4mol/L is added3(cube) is slowly added into is crushed under constant stirring
The concrete sample 1t of 120 mesh, is filtered after being stirred to react 1 hour, has obtained filtrate and solid after separating into filter press.
Filtrate is with 20%Ca (OH)2PH is transferred to 4, Fe (OH)3It is substantially completely precipitated out, filters, obtain Fe (OH)3Gu
The pH of filtrate is transferred to 7, Al (OH) by body and filtrate3It substantially completely precipitates, filters, obtain Al (OH)3Solid and filtrate, filter at this time
There was only CaCl in liquid2, being evaporated under conditions of 300 DEG C can be obtained CaCl2Solid.
Solid 0.7t and 30% fluosilicic acid are according to 4m3Ingredient, hybrid reaction, is evaporated at 150 DEG C, is waved in a kettle
The gas of hair is referring to patent: a kind of recycling SiF4 gas integrated of CN201310534326.8 (CN103588209A) utilizes method,
White carbon black is produced, absorbing liquid can be recycled.Solid after being evaporated adds water 2.5m3Stirring and dissolving, then plus 1:1 hydrochloric acid adjust pH
It less than 1, is filtered after boiling, obtains filtrate with 20% calcium hydroxide emulsion tune pH to 4, ferric hydroxide precipitate comes out at this time, obtains
Filtrate continue with calcium hydroxide tune pH to 7, aluminum hydroxide precipitation comes out at this time, and it is dry to separate iron hydroxide, aluminium hydroxide respectively
Dry to obtain product, last filtrate concentration, 240 DEG C are evaporated, and obtain CaCl2·2H2O。
Last filter residue is returned in the concrete sample of starting to mix and be continued with, and is reused, and resolution ratio can be with repeatedly
Reach 99%.
Chemical component in concrete is mainly SiO2、Fe2O3、Al2O3, CaO etc., the present invention be decomposed using chemical method it is mixed
The solidifying various essential elements of soil, then separate them by adjusting the method for pH, finally produce Fe (OH)3、Al(OH)3、
CaCl2, the products such as white carbon black.At optimum conditions, resolution ratio can achieve 99%.
Claims (1)
1. a kind of building waste method of comprehensive utilization, it is characterised in that the following steps are included:
A crushes building waste, then with mixed in hydrochloric acid, boils reaction 0.5-3 hours, filters after the reaction was completed, obtain filtrate
One and filter residue one；
The calcium hydroxide emulsion tune pH value to 4 of filtrate one is filtered to isolate red-brown precipitation iron hydroxide and filtrate two, so by b
Continue that the pH value of filtrate two is transferred to 7 with calcium hydroxide emulsion afterwards, filters to isolate white flock precipitate aluminium hydroxide and filtrate
Three, then filtrate three is evaporated, obtain white solid calcium chloride or CALCIUM CHLORIDE DIHYDRATE；
Filter residue one and fluosilicic acid hybrid reaction are evaporated to obtain containing SiF by c4Volatilization gas and solid, contain SiF4Volatilization
Gas obtains white carbon black and absorbing liquid after water absorbs, and solid plus water are ground, adds after hydrochloric acid boils and filters, obtain filtrate
Four and filter residue two；
D with calcium hydroxide emulsion tune pH to 2, then mixes filtrate four with filtrate one in return step a；Filter residue two returns to step
It is mixed in rapid a with the building waste of crushing or filter residue one；
In step a: the building waste is waste concrete block and/or useless brickbat slag, and building waste is crushed to -200 mesh of 100 mesh；
The concentration of the hydrochloric acid is 1mol/L-8mol/L, and the mass ratio of building waste and hydrochloric acid is 1:2-1:8；
The mass percent concentration of the calcium hydroxide emulsion is 2%-20%；
In step c: the mass percent concentration of the fluosilicic acid is 20%-40%, and filter residue one and the mass ratio of fluosilicic acid are 1:
4-1:8；The reaction temperature is the at a temperature of oil bath heating at 108-150 DEG C；The concentration of the hydrochloric acid be 2mol/L, solid with
The mass ratio of hydrochloric acid is 1:1-1:5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219237.2A CN107043132B (en) | 2017-04-06 | 2017-04-06 | Building waste method of comprehensive utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219237.2A CN107043132B (en) | 2017-04-06 | 2017-04-06 | Building waste method of comprehensive utilization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107043132A CN107043132A (en) | 2017-08-15 |
| CN107043132B true CN107043132B (en) | 2019-04-05 |
Family
ID=59544792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710219237.2A Expired - Fee Related CN107043132B (en) | 2017-04-06 | 2017-04-06 | Building waste method of comprehensive utilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107043132B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109704384B (en) * | 2019-01-24 | 2021-03-23 | 长江师范学院 | Preparation method of anhydrous calcium chloride |
| CN112876193A (en) * | 2021-02-05 | 2021-06-01 | 湖南省富民乐建材科技发展有限公司 | Gypsum-based sand-free self-leveling production method based on energy-saving building |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506372A (en) * | 2013-09-18 | 2014-01-15 | 薛彦辉 | Coal-fired furnace slag processing method |
| CN103601228A (en) * | 2013-11-01 | 2014-02-26 | 青岛星火化工技术有限公司 | Method for preparation of chemical raw materials by use of fly ash as raw material |
| CN104340995A (en) * | 2013-07-24 | 2015-02-11 | 沈阳铝镁设计研究院有限公司 | A comprehensive utilization method of red mud |
| CN106348331A (en) * | 2016-08-23 | 2017-01-25 | 魏巍 | Building waste material utilization method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848489B2 (en) * | 1977-04-09 | 1983-10-28 | 光和精鉱株式会社 | How to deal with "Karami" |
-
2017
- 2017-04-06 CN CN201710219237.2A patent/CN107043132B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104340995A (en) * | 2013-07-24 | 2015-02-11 | 沈阳铝镁设计研究院有限公司 | A comprehensive utilization method of red mud |
| CN103506372A (en) * | 2013-09-18 | 2014-01-15 | 薛彦辉 | Coal-fired furnace slag processing method |
| CN103601228A (en) * | 2013-11-01 | 2014-02-26 | 青岛星火化工技术有限公司 | Method for preparation of chemical raw materials by use of fly ash as raw material |
| CN106348331A (en) * | 2016-08-23 | 2017-01-25 | 魏巍 | Building waste material utilization method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107043132A (en) | 2017-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106365281B (en) | A kind of water body dephosphorized dose of preparation method and water body dephosphorized method | |
| CN102513329B (en) | Harmless treatment method for urban garbage incineration fly ash | |
| CN101891434B (en) | Aerated concrete regenerative building block produced by using garbage clinkers and manufacturing method thereof | |
| CN102703155B (en) | Biomass fuel based on sludge, straw and raw coal, preparation method of biomass fuel and application of fuel slag | |
| CN102060456B (en) | Method for solidifying waste incineration fly ash into high-strength materials | |
| CN101962590B (en) | Regenerative coal produced by multiple kinds of oily sludge in oil refinery and preparation method thereof | |
| CN103288116B (en) | Method for preparing high-purity calcium hydroxide from carbide slag | |
| CN107043132B (en) | Building waste method of comprehensive utilization | |
| CN109400016A (en) | Geo-polymer porous insulation material and preparation method thereof based on burning city domestic garbage bottom ash | |
| CN105948066B (en) | A kind of method for adding heavy metal in crystal seed induction hydrothermally stable incineration of refuse flyash | |
| CN104150792A (en) | Geopolymer cementitious material and preparation method thereof | |
| CN107129249A (en) | A kind of Bayer process red mud gangue roadbed material and preparation method | |
| CN103991940B (en) | A kind of coal ash for manufacturing is for hybrid flocculant technique | |
| CN106745101B (en) | A method of lithium carbonate is prepared from brine using absorption and method for calcinating | |
| CN102311136A (en) | Method for producing low iron aluminum sulfate by utilization of coal gangue | |
| CN102992726B (en) | Baking-free ceramicite | |
| CN103752261A (en) | Method for preparing uranium adsorbent and curing agent by using raw materials of white mud and oil shale ash | |
| CN101956441A (en) | Lightweight environment-friendly bricks prepared from waste incineration flyash and preparation method thereof | |
| CN107540041A (en) | Application of the discarded concrete in removing fluorine from water | |
| CN102826560A (en) | Red mud resource utilization method | |
| CN109437849A (en) | A kind of preparation method with the modified tapestry brick processed of domestic garbage incineration flyash | |
| CN104477982B (en) | A kind of high titanium gangue is prepared the method for titanium dioxide | |
| CN106082900B (en) | One kind discarding construction refuse regenerated heat-preserving energy-saving brick | |
| CN104163648A (en) | Method for sintering ceramsite by using building waste materials and sludge | |
| CN101037289A (en) | Method for recovering and reusing industrial acid-washed metal sludge in steel plate production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190405 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |