CN102775130A - Sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings and preparation method thereof - Google Patents
Sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings and preparation method thereof Download PDFInfo
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- CN102775130A CN102775130A CN2012102497414A CN201210249741A CN102775130A CN 102775130 A CN102775130 A CN 102775130A CN 2012102497414 A CN2012102497414 A CN 2012102497414A CN 201210249741 A CN201210249741 A CN 201210249741A CN 102775130 A CN102775130 A CN 102775130A
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- domestic garbage
- phosphorite tailings
- garbage incineration
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- incineration flyash
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention discloses a sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings and a preparation method thereof. The sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings is prepared from the following raw materials in percentage by mass: 20-30% of domestic waste incineration fly ash, 25-30% of clay and 40-50% of phosphorite tailings. The preparation method comprises the following steps: pretreating the raw materials before pulverization, pulverizing the raw materials, aging the raw materials, forming the raw materials, drying the blank, and sintering, thereby finally obtaining the sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings. The invention implements recycling of domestic waste incineration fly ash and phosphorite tailings, and can destroy dioxin in fly ash in the sintering process, and the finished product with compact structure can fix heavy metals in the fly ash, thereby converting the fly ash into harmless substances.
Description
Technical field
The present invention relates to a kind of vitrified brick, particularly a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings and preparation method thereof.
Background technology
Incineration of refuse flyash is the secondary pollutant (hereafter flying dust) that produces in the waste incineration process, and its production rate is generally 2-5 %.In the flying dust enrichment objectionable impuritiess such as more heavy metal, Dioxins and dissolved salt, classified as a kind of Hazardous wastes by many countries, need to dispose or utilize again through carrying out landfill after the pre-treatment.
At present domestic have two kinds to the main safe handling method of disposal of flying dust, and the one,, carry out the curing/stabilizing processing earlier and get into Hazardous wastes landfill yard landfill again; The 2nd,, through sending the sanitary filling field landfill after the satisfied harsher leaching index of pre-treatment (household refuse landfill sites pollutes control criterion (GB168892-2008)).These two kinds of methods have been avoided heavy metal in the flying dust at short notice owing to leach the harm that environment is caused, but remain in some problems.At first, Hazardous wastes landfill yard landfill appropriate litigation fees is high, and flying dust is if all dispose at Hazardous wastes landfill yard landfill, and a year landfill expense can reach several hundred million units; Though the regulation flying dust can get into the sanitary filling field disposal after 2008, pre-treatment expense before is higher.Secondly, the flying dust landfill takies a large amount of land resourcess, and the flyash curing body of inserting landfill yard can not recycling; And the flying dust landfill can not be destroyed Dioxins and thoroughly blocking-up heavy metal leaching, has the potential possibility of the secondary pollution of causing.Thus, it is extremely urgent to seek more economical reasonable and safe treatment and disposal method or method of resource.
Phosphorite tailings is the phosphorus ore raw ore through grinding, adopt different technique of preparings that phosphorus is carried out residual material after the enrichment, and its staple is SiO
2, CaO, MgO, Fe
2O
3, Al
2O
3The phosphorus ore 80% of China's exploitation is middle low grade ore, and every production 1 t phosphorus concentrate will produce w (P
2O
5) be 3%～6% the about 0.44t of phosphorite tailings, approximately can produce phosphorite tailings 7000kt every year.Therefore, need seek the resource utilization approach for phosphorite tailings.
Based on this and urban sustainable development, the resource utilization of realization flying dust and phosphorite tailings when this problem is intended to flying dust and phosphorite tailings the flying dust harmless treatment disposed as main raw material development vitrified brick.Utilize flying dust and phosphorite tailings development vitrified brick, the energy consumption that can not only reduce in the sintering process promotes low carbon development, is expected to improve its performance, makes it have certain potential market.The more important thing is to save a large amount of flying dust security landfill disposal costs and land resources and realize the resource utilization of phosphorite tailings, so this problem to have the high economic meaning.The heavy metal in the flying dust can stablized/solidify to the vitrified brick roasting process, and be expected to destroy Dioxins, realizes the innoxious of flying dust, can avoid the potential secondary pollution of flying dust in the landfill process thus, has far-reaching social effect.
Domestic and international present Research and development trend
The flying dust processing mode is a lot, curing/stabilizing, acid or other solvent extraction and the high-temperature heat treatment of mainly containing at present commonly used.Wherein, Thermal treatment mainly comprises sintering and fusion/vitrifying; High-temperature heat treatment generally can effectively be destroyed the above dioxin contamination thing of 99 % in the flying dust, and heavy metal leaching toxicity reduces greatly in the gained cured body, is a kind of method that can effectively realize the flying dust harmless treatment.
The flying dust sintering processes is temperature required low usually, and it is under being lower than melt temperature, through making solid particulate obtain propagation energy major part even whole pore to be got rid of from crystal, thereby becomes the process of fine and close and hard sintered compact.It can loss-rate fusing fly ash/vitrifying processing hang down, and reduce heavy metal volatilization at high temperature to a certain extent; Simultaneously, its dense sintering body plays better solidification to heavy metal, and the common stable height of sintered product can be become the focus of domestic and international research in recent years by recycling.Mangialardi is 15 mm with being pressed into the bottom surface diameter after the flying dust washing, and height is the small cylindrical base substrate of 20 mm, calcines 60 min down at 1,140 ℃ high temperature then, and the ultimate compression strength of sintering curing body reaches 2.8MPa.Wang etc. carry out sintering processes with flying dust under 1,100 ℃ and 1,140 ℃, obtain the sintered product that ultimate compression strength is respectively 6-8 MPa and 12 MPa.Polettini etc. have added the activity that additives such as glass cullet and some ores excite flying dust in flying dust, 1,100-1 calcines for 150 ℃, and gained flying dust sintering curing body performance can satisfy the requirement of concrete rough aggregate.Mud, mining wastes and flying dust that Huang etc. will contain heavy metal are blended under 1,150 ℃ to be calcined, and the heavy metals immobilization rate is compared with melting treatment and increased in the gained sintering curing body.
The cured body of above sintering gained uses as coarse aggregate usually, is worth lowlyer, and the higher cost in can not the compensation deals process is still needed and sought the higher sintered compact outlet of value.Oblige give birth to wait and utilize flying dust to fire the Alinty cement clinker,, but still must solve the problems such as volatilization of heavy metal under the high temperature about up to 1400 ℃ for the recycling of flying dust provides new way.Do not see as yet that both at home and abroad other scholar is with the report of flying dust as main raw material development ceramic tile.
Summary of the invention
One of the object of the invention is that above-mentioned domestic garbage incineration flyash is innoxious to be provided a kind of with technical problem such as resource utilization and phosphorite tailings recycling and process vitrified brick with domestic garbage incineration flyash and phosphorite tailings in order to solve.
Two of the object of the invention is a kind of preparation method who processes vitrified brick with domestic garbage incineration flyash and phosphorite tailings of providing above-mentioned.
Technical scheme of the present invention
A kind ofly process vitrified brick with domestic garbage incineration flyash and phosphorite tailings, its feed composition is calculated by mass percentage, and its composition and content are following:
Domestic garbage incineration flyash 20～30%
Clay 25～30%
Phosphorite tailings 40～50%.
Described domestic garbage incineration flyash is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 32.4~39.1%
SiO
2 17.3~24.8%
Al
2O
3 4.9~11.7%
Fe
2O
3 2.3~5.9%
MgO 2.1~5.5%
Described phosphorite tailings is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 15.8~29.4%
SiO
2 51.8~68.7%
Al
2O
3 5.9~10.5%
Fe
2O
3 3.9~7.5%
P
2O
5 3~6%
MgO 2.7~6.5%
Described clay is calculated by mass percentage, and its main chemical compositions and content are following:
SiO
2 69.8-73.4%
Al
2O
3 13.2-14.9%
Fe
2O
3 4.1-5.6%
K
2O 2.1-4.2%
Na
2O 0.3-0.8%
CaO 0.7-1.5%
MgO 1.1-1.9%
TiO
2 0.6-1.1%
MnO 0.1-0.2%。
The preparation method of above-mentioned a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings comprises the steps:
(1), pre-treatment before the raw material pulverizing
With domestic garbage incineration flyash and clay, phosphorite tailings air seasoning 24～48h in 10～25 ℃ kiln;
(2), the pulverizing of raw material
With pulverizing through pretreated raw material of step (1) gained, control discharging fineness 50～70% is between 200～250 orders;
(3), the ageing of raw material
The raw material after crushed of step (2) gained is added the water stirring in stirrer; The amount of water of controlling every 100kg raw material is 5.5～9L; Preferred 6.5 ~ 8L stirs 3～5min, at room temperature leaves standstill 12～24h afterwards and makes its ageing; After the ageing after 50～100 mesh sieves, with the homogenizing that promotes raw material and the formation of micelle;
(4), the moulding of raw material
With the raw material of step (3) after ageing is sieved, blank forming after carrying out twice pressurization on the brickmaking shaper, control is pressure 240～420kg/cm for the first time
2, pressure 400～700kg/cm for the second time
2
(5), body drying
Is dry 10～15h in 50～100 ℃ the dry kiln with the molding blank of step (4) gained in temperature;
(6), sinter brick into
Step (5) is gone into smelting furnace through dried base substrate calcine, the firing temperature of smelting furnace is controlled at 1050～1150 ℃, and time 2.5～3.5h promptly gets and a kind ofly processes vitrified brick with domestic garbage incineration flyash and phosphorite tailings.
The a kind of of above-mentioned gained processes vitrified brick with domestic garbage incineration flyash and phosphorite tailings, and its size deviation reaches the requirement of excellent vitrified brick among the GB5101-2003; Apparent mass has reached among the GB5101-2003 requirement to imperial and acceptable end product; Strength grade reaches the MU20 strength grade; The water-intake rate peak 14%, and average saturation factor < 0.90, < 1.1, goods reach the requirement of antagonism weathering capacity among the GB5101-2003 to the maximum saturation coefficient fully; Goods satisfy the requirement of anti-freezing property fully; Lime blowing reaches the requirement of first-class or premium grads; Scum reaches the requirement of premium grads or acceptable end product.
Useful technique effect of the present invention
Because along with the flying dust that fast development produced of garbage incineration technology is increasing, flying dust is a kind of generally acknowledged Hazardous wastes because of containing Dioxins and plurality of heavy metal, its Dioxins and heavy metal are the difficult points in the treating processes.Yet, contain more silicate and aluminosilicate in the flying dust, be a kind of useful material, but recycling.The phosphorite tailings staple is SiO
2, CaO and Al
2O
3Instead part clay-brickmaking.Not only realized the recycling of refuse with flying dust and phosphorite tailings development vitrified brick, and its calcination process can destroy the Dioxins in the flying dust, the fine and close structure of gained finished product can be solidified the heavy metal in the flying dust again, thereby reaches the innoxious purpose of flying dust.
Dispose because existing flying dust generally carries out landfill at sanitary filling field after solidification treatment, not only take tract but also handling high (2700 yuan/ton of landfill yard overheadss), China every year only the flying dust handling just up to tens.The present main disposal options of phosphorite tailings also is a landfill, has taken land resources.Therefore, a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings of the present invention has not only been saved the treatment and disposal expense of flying dust and phosphorite tailings, brings the certain economic interests but also can be used as commodity, has certain economic benefits.
In addition, can not destroy Dioxins because the flying dust landfill yard is handled, heavy metal wherein can not be degraded, and will cause great harm to society in case take place to leak, and therefore has certain hidden danger; The flying dust landfill yard can not utilize after closing again, causes a large amount of wastes of resource.A kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings of the present invention is processed available safety product with flying dust and has not only been guaranteed sustainable development but also reduced the potential hazard to society to have the certain social meaning.
Embodiment
Through embodiment the present invention is further set forth below, but do not limit the present invention.
Used flying dust is taken from Shanghai Jiang Qiao domestic garbage burning electricity generation factory, clay Zhejiang Ding Jiaqiao, phosphorite tailings and is got Anhui six state chemical companies in the various embodiments of the present invention, and its main chemical compositions is as shown in the table respectively:
The main chemical compositions (%) of used flying dust, clay, phosphorite tailings among each embodiment
| ? | SiO 2 | Al 2O 3 | Fe 2O 3 | K 2O | Na 2O | CaO | MgO | TiO 2 | P 2O 5 | MnO |
| Clay | 71.6 | 14.7 | 5.2 | 2.9 | 0.8 | 0.9 | 1.7 | 1.1 | — | 0.1 |
| Phosphorite tailings | 60.4 | 7.6 | 6.8 | — | — | 16.3 | 4.6 | — | 4.2 | — |
| Flying dust | 24.3 | 10.6 | 4.9 | — | — | 36.6 | 3.7 | — | — | — |
Used brickmaking shaper is that material is built the QTY4-20B of section in Beijing in the embodiments of the invention.
Embodiment 1
A kind ofly process vitrified brick with domestic garbage incineration flyash and phosphorite tailings, the mass percent of its raw material consists of:
Domestic garbage incineration flyash 20%
Clay 30%
Phosphorite tailings 50%.
Above-mentioned a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings, its preparation process comprises the steps:
(1), pre-treatment before the raw material pulverizing
With domestic garbage incineration flyash and clay, phosphorite tailings air seasoning 36h in 15 ℃ kiln;
(2), the pulverizing of raw material
With pulverizing through pretreated raw material of step (1) gained, control discharging fineness 60% is between 200～250 orders;
(3), the ageing of raw material
The raw material after crushed of step (2) gained is added the water stirring in stirrer; The amount of water of controlling every 100kg raw material is 6.5L, stirs 4min, at room temperature leaves standstill 18h afterwards and makes its ageing; Raw material after the ageing is after 50～100 mesh sieves, with the homogenizing of promotion raw material and the formation of micelle;
(4), the moulding of raw material
With the raw material of step (3) after ageing is sieved, blank forming after carrying out twice pressurization on the brickmaking shaper, control is pressure 240 kg/cm for the first time
2, pressure 700kg/cm for the second time
2
(5), body drying
Is dry 15h in 60 ℃ the dry kiln with the molding blank of step (4) gained in temperature;
(6), sinter brick into
Step (5) is gone into smelting furnace through dried base substrate calcine, the firing temperature control of smelting furnace
At 1050～1150 ℃, time 3h, the vitrified brick that promptly handy domestic garbage incineration flyash and phosphorite tailings are processed.
A kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings of above-mentioned gained, its size deviation is measured according to GB/T 2542, sample≤7mm, 2.5mm≤mv≤2.5mm meets the requirement of GB5101-2003 first-class, excellent vitrified brick;
Its apparent mass is measured according to GB/T 2542, two the face discrepancy in elevation≤3mm, and impurity projecting height≤3mm, three of the truncation arrisdefect destroyed size≤20mm, reached among the GB5101-2003 requirement to imperial and acceptable end product;
Its intensity index is measured according to GB/T 2542, MV >=20MPa, and grade reaches the MU20 strength grade;
Its water-intake rate is measured according to GB/T 2542, peak 13%, and average saturation factor < 0.90, the maximum saturation coefficient is measured according to GB/>T 2542, and < 1.0, goods reach the requirement of antagonism weathering capacity among the GB5101-2003 fully;
Its anti-freezing property is measured according to GB/T 2542, and mass loss≤1.6% satisfies the requirement of first-class or premium grads;
Its lime blowing performance is measured according to GB/T 2542, and 2mm≤maximum explosion size≤10mm reaches the requirement of first-class or premium grads;
Its scum performance is measured according to GB/T 2542, and no scum reaches the requirement of premium grads.
Embodiment 2
A kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings, the mass percent of its raw material consists of:
Domestic garbage incineration flyash 25%
Clay 30%
Phosphorite tailings 45%.
Above-mentioned a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings, its preparation process comprises the steps:
(1), pre-treatment before the raw material pulverizing
With domestic garbage incineration flyash and clay, phosphorite tailings air seasoning 40h in 20 ℃ kiln;
(2), the pulverizing of raw material
With pulverizing through pretreated raw material of step (1) gained, control discharging fineness 60% is between 200～250 orders;
(3), the ageing of raw material
The raw material after crushed of step (2) gained is added the water stirring in stirrer; The amount of water of controlling every 100kg raw material is 7L, stirs 4min, at room temperature leaves standstill 20h afterwards and makes its ageing; Raw material after the ageing is after 50～100 mesh sieves, with the homogenizing of promotion raw material and the formation of micelle;
(4), the moulding of raw material
With the raw material of step (3) after ageing is sieved, blank forming after carrying out twice pressurization on the brickmaking shaper, control is pressure 300 kg/cm for the first time
2, pressure 700kg/cm for the second time
2
(5), body drying
Is dry 15h in 70 ℃ the dry kiln with the molding blank of step (4) gained in temperature;
(6), sinter brick into
Step (5) is gone into smelting furnace through dried base substrate calcine, the firing temperature of smelting furnace is controlled at 1050～1150 ℃, time 3h, the vitrified brick that promptly handy domestic garbage incineration flyash and phosphorite tailings are processed.
Embodiment 3
A kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings, the mass percent of its raw material consists of:
Domestic garbage incineration flyash 30%
Clay 30%
Phosphorite tailings 40%.
Above-mentioned a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings, its preparation process comprises the steps:
(1), pre-treatment before the raw material pulverizing
With domestic garbage incineration flyash and clay, phosphorite tailings air seasoning 40h in 20 ℃ kiln;
(2), the pulverizing of raw material
With pulverizing through pretreated raw material of step (1) gained, control discharging fineness 65% is between 200～250 orders;
(3), the ageing of raw material
The raw material after crushed of step (2) gained is added the water stirring in stirrer; The amount of water of controlling every 100kg raw material is 7.5L, stirs 4min, at room temperature leaves standstill 20h afterwards and makes its ageing; Raw material after the ageing is after 50～100 mesh sieves, with the homogenizing of promotion raw material and the formation of micelle;
(4), the moulding of raw material
With the raw material of step (3) after ageing is sieved, blank forming after carrying out twice pressurization on the brickmaking shaper, control is pressure 300kg/cm for the first time
2, pressure 700kg/cm for the second time
2
(5), body drying
Is dry 15h in 70 ℃ the dry kiln with the molding blank of step (4) gained in temperature;
(6), sinter brick into
Step (5) is gone into smelting furnace through dried base substrate calcine, the firing temperature of smelting furnace is controlled at 1050～1150 ℃, time 2.5h, the vitrified brick that promptly handy domestic garbage incineration flyash and phosphorite tailings are processed.
Embodiment 4
A kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings, the mass percent of its raw material consists of:
Domestic garbage incineration flyash 30%
Clay 25%
Phosphorite tailings 45%.
Above-mentioned a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings, its preparation process comprises the steps:
(1), pre-treatment before the raw material pulverizing
Domestic garbage incineration flyash and clay, phosphorite tailings before grinding in 20 ℃ kiln air seasoning 30h;
(2), the pulverizing of raw material
With pulverizing through pretreated raw material of step (1) gained, control discharging fineness 65% is between 200～250 orders;
(3), the ageing of raw material
The raw material after crushed of step (2) gained is added the water stirring in stirrer; The amount of water of controlling every 100kg raw material is 8L, stirs 4min, at room temperature leaves standstill 20h afterwards and makes its ageing; Raw material after the ageing is after 50～100 mesh sieves, with the homogenizing of promotion raw material and the formation of micelle;
(4), the moulding of raw material
With the raw material of step (3) after ageing is sieved, blank forming after carrying out twice pressurization on the brickmaking shaper, control is pressure 300 kg/cm for the first time
2, pressure 700kg/cm for the second time
2
(5), body drying
Is dry 15h in 70 ℃ the dry kiln with the molding blank of step (4) gained in temperature;
(6), sinter brick into
Step (5) is gone into smelting furnace through dried base substrate calcine, the firing temperature of smelting furnace is controlled at 1050～1150 ℃, time 3.5h, the vitrified brick that promptly handy consumer waste incineration and phosphorite tailings are processed.
In sum, a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings of the present invention, its size deviation reaches the requirement of excellent vitrified brick among the GB5101-2003; Apparent mass has reached among the GB5101-2003 requirement to imperial and acceptable end product; Strength grade reaches the MU20 strength grade; The water-intake rate peak 13%, and average saturation factor < 0.90, < 1.0, goods reach the requirement of antagonism weathering capacity among the GB5101-2003 to the maximum saturation coefficient fully; Goods satisfy the requirement of anti-freezing property fully; Lime blowing reaches the requirement of first-class or premium grads; Scum reaches the requirement of premium grads or acceptable end product.
The description of the foregoing description is can understand and use the present invention for the ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various improvement to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (10)
1. process vitrified brick with domestic garbage incineration flyash and phosphorite tailings for one kind, it is characterized in that its feed composition calculates by mass percentage, its composition and content are following:
Domestic garbage incineration flyash 20～30%
Clay 25～30%
Phosphorite tailings 40～50%;
Described domestic garbage incineration flyash is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 32.4~39.1%
SiO
2 17.3~24.8%
Al
2O
3 4.9~11.7%
Fe
2O
3 2.3~5.9%
MgO 2.1~5.5%
Described phosphorite tailings is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 15.8~29.4%
SiO
2 51.8~68.7%
Al
2O
3 5.9~10.5%
Fe
2O
3 3.9~7.5%
P
2O
5 3~6%
MgO 2.7~6.5%
Described clay is calculated by mass percentage, and its main chemical compositions and content are following:
SiO
2 69.8-73.4%
Al
2O
3 13.2-14.9%
Fe
2O
3 4.1-5.6%
K
2O 2.1-4.2%
Na
2O 0.3-0.8%
CaO 0.7-1.5%
MgO 1.1-1.9%
TiO
2 0.6-1.1%
MnO 0.1-0.2%。
2. as claimed in claim 1ly a kind ofly process vitrified brick with domestic garbage incineration flyash and phosphorite tailings, it is characterized in that its feed composition calculates by mass percentage, its composition and content are following:
Domestic garbage incineration flyash 20%
Clay 30%
Phosphorite tailings 50%;
Described domestic garbage incineration flyash is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 36.6%
SiO
2 24.3%
Al
2O
3 10.6%
Fe
2O
3 4.9%
MgO 3.7%
Described phosphorite tailings is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 16.3%
SiO
2 60.4%
Al
2O
3 7.6%
Fe
2O
3 6.8%
P
2O
5 4.2%
MgO 4.6%
Described clay is calculated by mass percentage, and its main chemical compositions and content are following:
SiO
2 71.6%
Al
2O
3 14.7%
Fe
2O
3 5.2%
K
2O 2.9%
Na
2O 0.8%
CaO 0.9%
MgO 1.7%
TiO
2 1.1%
MnO 0.1%。
3. as claimed in claim 1ly a kind ofly process vitrified brick with domestic garbage incineration flyash and phosphorite tailings, it is characterized in that its feed composition calculates by mass percentage, its composition and content are following:
Domestic garbage incineration flyash 25%
Clay 30%
Phosphorite tailings 45%;
Described domestic garbage incineration flyash is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 36.6%
SiO
2 24.3%
Al
2O
3 10.6%
Fe
2O
3 4.9%
MgO 3.7%
Described phosphorite tailings is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 16.3%
SiO
2 60.4%
Al
2O
3 7.6%
Fe
2O
3 6.8%
P
2O
5 4.2%
MgO 4.6%
Described clay is calculated by mass percentage, and its main chemical compositions and content are following:
SiO
2 71.6%
Al
2O
3 14.7%
Fe
2O
3 5.2%
K
2O 2.9%
Na
2O 0.8%
CaO 0.9%
MgO 1.7%
TiO
2 1.1%
MnO 0.1%。
4. as claimed in claim 1ly a kind ofly process vitrified brick with domestic garbage incineration flyash and phosphorite tailings, it is characterized in that its feed composition calculates by mass percentage, its composition and content are following:
Domestic garbage incineration flyash 30%
Clay 30%
Phosphorite tailings 40%;
Described domestic garbage incineration flyash is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 36.6%
SiO
2 24.3%
Al
2O
3 10.6%
Fe
2O
3 4.9%
MgO 3.7%
Described phosphorite tailings is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 16.3%
SiO
2 60.4%
Al
2O
3 7.6%
Fe
2O
3 6.8%
P
2O
5 4.2%
MgO 4.6%
Described clay is calculated by mass percentage, and its main chemical compositions and content are following:
SiO
2 71.6%
Al
2O
3 14.7%
Fe
2O
3 5.2%
K
2O 2.9%
Na
2O 0.8%
CaO 0.9%
MgO 1.7%
TiO
2 1.1%
MnO 0.1%。
5. as claimed in claim 1ly a kind ofly process vitrified brick with domestic garbage incineration flyash and phosphorite tailings, it is characterized in that its feed composition calculates by mass percentage, its composition and content are following:
Domestic garbage incineration flyash 30%
Clay 25%
Phosphorite tailings 45%;
Described domestic garbage incineration flyash is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 36.6%
SiO
2 24.3%
Al
2O
3 10.6%
Fe
2O
3 4.9%
MgO 3.7%
Described phosphorite tailings is calculated by mass percentage, and its main chemical compositions and content are following:
CaO 16.3%
SiO
2 60.4%
Al
2O
3 7.6%
Fe
2O
3 6.8%
P
2O
5 4.2%
MgO 4.6%
Described clay is calculated by mass percentage, and its main chemical compositions and content are following:
SiO
2 71.6%
Al
2O
3 14.7%
Fe
2O
3 5.2%
K
2O 2.9%
Na
2O 0.8%
CaO 0.9%
MgO 1.7%
TiO
2 1.1%
MnO 0.1%。
6. like any preparation method of the described a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings of claim of claim 1 ~ 5, it is characterized in that comprising the steps:
(1), pre-treatment before the raw material pulverizing
With domestic garbage incineration flyash and clay, phosphorite tailings air seasoning 24～48h in 10～25 ℃ kiln;
(2), the pulverizing of raw material
With pulverizing through pretreated raw material of step (1) gained, control discharging fineness 50～70% is between 200～250 orders;
(3), the ageing of raw material
The raw material after crushed of step (2) gained is added the water stirring in stirrer; The amount of water of controlling every 100kg raw material is 5.5～9L, stirs 3～5min, at room temperature leaves standstill 12～24h afterwards and makes its ageing; After the ageing after 50～100 mesh sieves, with the homogenizing that promotes raw material and the formation of micelle;
(4), the moulding of raw material
With the raw material of step (3) after ageing is sieved, blank forming after carrying out twice pressurization on the brickmaking shaper, control is pressure 240～420 kg/cm for the first time
2, pressure 400～700kg/cm for the second time
2
(5), body drying
Is dry 10～15h in 50～100 ℃ the dry kiln with the molding blank of step (4) gained in temperature;
(6), sinter brick into
Step (5) is gone into smelting furnace through dried base substrate calcine, the firing temperature of smelting furnace is controlled at 1050～1150 ℃, and time 2.5～3.5h promptly gets and a kind ofly processes vitrified brick with domestic garbage incineration flyash and phosphorite tailings.
7. the preparation method of a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings as claimed in claim 6 is characterized in that before the raw material pulverizing described in the step (1) that pre-treatment is about to domestic garbage incineration flyash and clay, phosphorite tailings air seasoning 36～40h in 15～20 ℃ kiln.
8. the preparation method of a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings as claimed in claim 7 is characterized in that control discharging fineness 60～65% is between 200～250 orders in the crushing process of the described raw material of step (2).
9. the preparation method of a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings as claimed in claim 8 is characterized in that in the ageing process of the raw material described in the step (3), the amount of water of controlling every 100kg raw material is 6.5～8L.
10. the preparation method of a kind of vitrified brick of processing with domestic garbage incineration flyash and phosphorite tailings as claimed in claim 9, the moulding process control that it is characterized in that the raw material described in the step (4) is pressure 240～300 kg/cm for the first time
2, pressure 700kg/cm for the second time
2
Molding blank described in the step (5) is dry 15h in 60～70 ℃ the dry kiln in temperature.
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| CN103170488A (en) * | 2013-02-07 | 2013-06-26 | 中国恩菲工程技术有限公司 | Waste incineration fly ash curing agent and treatment method of waste incineration fly ash |
| CN104003691A (en) * | 2014-06-13 | 2014-08-27 | 宋晓 | Method for producing sintered bricks through high-water-content aluminum oxide mill tailings |
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| CN104003691B (en) * | 2014-06-13 | 2016-08-17 | 宋晓 | A kind of method utilizing high-moisture percentage aluminium oxide milltailings to produce fired brick |
| CN104003691A (en) * | 2014-06-13 | 2014-08-27 | 宋晓 | Method for producing sintered bricks through high-water-content aluminum oxide mill tailings |
| RU2558033C1 (en) * | 2014-07-09 | 2015-07-27 | Юлия Алексеевна Щепочкина | Ceramic mixture for facing tile fabrication |
| CN106396619A (en) * | 2016-09-07 | 2017-02-15 | 安徽金生金世电子科技有限公司 | High-temperature-resistant wall brick and preparation method thereof |
| CN106431196A (en) * | 2016-09-07 | 2017-02-22 | 安徽金生金世电子科技有限公司 | Thermal insulation firewall brick and preparation method thereof |
| CN107324772A (en) * | 2017-06-14 | 2017-11-07 | 湖北楚荆新型建材有限公司 | A kind of fly ash baked brick and its preparation technology |
| CN107235709A (en) * | 2017-06-21 | 2017-10-10 | 上海大学 | A kind of method that incineration of refuse flyash is granulated with sludge mixing low temp |
| CN109721333A (en) * | 2019-01-21 | 2019-05-07 | 江苏中宜生态土研究院有限公司 | A kind of pottery brick and preparation method of garbage flying ash preparation |
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