CN108558245A - A kind of sludge base cement mixture and preparation method thereof - Google Patents
A kind of sludge base cement mixture and preparation method thereof Download PDFInfo
- Publication number
- CN108558245A CN108558245A CN201810540780.7A CN201810540780A CN108558245A CN 108558245 A CN108558245 A CN 108558245A CN 201810540780 A CN201810540780 A CN 201810540780A CN 108558245 A CN108558245 A CN 108558245A
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- China
- Prior art keywords
- sludge
- parts
- cement mixture
- flyash
- bauxite
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of sludge base cement mixture and preparation method thereof, which includes 10~20 parts of 90~110 parts of sludge, 30~50 parts of flyash, 10~20 parts of tailing bauxite and industrial gypsum；Preparation method is that 80~120min is calcined under the conditions of 800~1100 DEG C after drying sludge, flyash, tailing bauxite and industrial gypsum mix, and cooling can be prepared by the cement mixture.The present invention is by compounding sludge, flyash, tailing bauxite and industrial gypsum, bending strength of cement and compression strength can not only be effectively improved, and can make full use of sludge low in raw material price, derive from a wealth of sources, be rich in the features such as various active oxide, provide new approaches for the high added value recycling of sludge；The drying, deodorization, the integration of recycling treatment of sludge are realized when preparing simultaneously, simple for process, easy to operate, manufacturing cost is low, generates economic benefit.
Description
Technical field
The invention belongs to cement mixture fields more particularly to a kind of sludge base cement mixture and preparation method thereof.
Background technology
Sludge is the product after sewage disposal, be one kind by groups such as organic debris, microorganism, inorganic particle, colloids
At extremely complex heterogeneous body, the key property of substance of this kind is that yield is big, and moisture content is high (up to 95% or more), holds
Easily degenerate it is smelly, additionally due to also easily being caused to surrounding enviroment containing a certain amount of heavy metal if dealing with improperly in sludge
Secondary pollution.Therefore, how to solve recycling sludge the problems in utilize, it is current to seek the new way that recycling sludge utilizes
Important topic urgently to be resolved hurrily.Referring now to the recycling of sludge, there are research, such as Publication No. both at home and abroad
The Chinese invention patent application of CN105948885A discloses a kind of activated sludge organic fertilizer and preparation method thereof；Publication No.
The Chinese invention patent application of CN105948705A discloses a kind of containing silicon sludge system using what is generated during cold rolling acid regeneration
The method for making brick, this method are prepared for adobe of good performance by calcining.
Although the recycling treatment process of existing sludge has obtained the approval of people, still there is the space improved and improved.
To find out its cause, being first that current sludge stoving process complexity is cumbersome, less efficient, the molding effect of sludge is bad；Second it is dirty
Mud resource technical parameter is more demanding, and operation and maintenance cost are excessively high；Three are drying, deodorization, recycling of sludge etc.
Reason fails integration, causes such as unnecessary wasting of resources of freight charges, warehouse, Storage.
Therefore, now there is an urgent need for it is a kind of being capable of fully recycling sludge and method at low cost.
Invention content
Goal of the invention：The first object of the present invention is to provide one kind being capable of fully recycling sludge and at low cost, technique letter
Single sludge base cement mixture, the mixing material can effectively improve bending strength of cement and compression strength.
The second object of the present invention is to provide the preparation method of the cement mixture.
Technical solution：Sludge base cement mixture of the present invention includes the following raw material in parts by weight：90~110 parts of sludge,
10~20 parts of 30~50 parts of flyash, 10~20 parts of tailing bauxite and industrial gypsum.
The present invention is by compounding sludge, flyash, tailing bauxite and industrial gypsum, not only simple process and low cost,
And bending strength of cement and compression strength can be effectively improved, abundant high added value ground resource sludge；Contain in sludge simultaneously
CaSO4·xH2Calcium oxide, oxidation reactive aluminums of the O with flyash and in tailing bauxite generate C4A3S gelation activity phases, flyash
And silica, calcium oxide and oxidation reactive aluminum generate C in tailing bauxite2S gelation activity phases, the generation of gelation activity phase are effective
The gelling of the sludge base cement is improved, specific reaction equation is respectively：
CaSO4.xH20+CaO+A12O3→C4A3S
SiO2+CaO+A1203→C2AS+C25
Furtherly, the flyash grain size used preferably can be 5~75 μm, preferably may include SiO by mass fraction250
~65%, Al2O315~40%, CaO 1~4% and surplus Fe2O3, the porosity of the type flyash is up to 50~80%, inhales
Aqueous relatively strong, granulation ability is stronger, and the preparation for sludge base cement mixture provides aluminum raw material.
It further says, the tailing bauxite of use preferably may include Al by mass fraction2O350~60%, SiO220~
35%, Fe2O33~5% and surplus CaO, the tailing bauxite provide sa raw material for the preparation of sludge base cement mixture.
The industrial gypsum used preferably can be dihydrate gypsum, semi-hydrated gypsum or anhydrous gypsum.
Furtherly, the method that the present invention prepares sludge base cement mixture, includes the following steps：In parts by weight will
After sludge, flyash, tailing bauxite and the drying of industrial gypsum mix, 80~120min is calcined under the conditions of 800~1100 DEG C,
Cooling can be prepared by the cement mixture.
Furtherly, drying is 40~70min of drying under the conditions of 600~800 DEG C when preparation.
Advantageous effect：Compared with prior art, remarkable advantage of the invention is：The sludge base cement mixture is by will be dirty
Mud, flyash, tailing bauxite and industrial gypsum compounding, can not only effectively improve bending strength of cement and compression strength, and
Sludge low in raw material price is can make full use of, derives from a wealth of sources, be rich in the characteristics of various active oxide, expands answering for sludge
With market, reasonable employment solid waste is environmental-friendly, and new approaches are provided for the high added value recycling of sludge；Together
When the drying, deodorization, the integration of recycling treatment of sludge, simple for process, easy to operate, manufacturing cost are realized when preparing
It is low, generate economic benefit.
Specific implementation mode
Technical scheme of the present invention is described in further detail with reference to embodiment.
Embodiment 1
Raw material components：10 parts of 90 parts of sludge, 30 parts of flyash, 10 parts of tailing bauxite and dihydrate gypsum.
The method that the present invention prepares sludge base cement mixture includes the following steps：
(1) sludge in sludge canopy is delivered in blender by conveyer, be added flyash, tailing bauxite and
Dihydrate gypsum is allowed to uniformly mixed, and wet mud batch mixing is made；
(2) wet mud batch mixing is delivered to by conveyer in dryer, high temperature drying is carried out to batch mixing at 600 DEG C
70min makes the moisture content ＜ 20% of sludge, and dry sludge batch mixing is made；
(3) above-mentioned drying sludge batch mixing is delivered to by conveyer in tapping a blast furnace equipment, then in calcining furnace at 900 DEG C
High-temperature calcination 120min is carried out to batch mixing, gives full play to the activity of the oxides such as calcium in sludge, aluminium, is then discharged and in cooler
The sludge base cement mixture is made in middle chilling, is stored in finished product heap canopy.
Embodiment 2
Raw material components：100 parts of sludge, 50 parts of flyash, 20 parts of tailing bauxite, 20 parts of dihydrate gypsum.
The method that the present invention prepares sludge base cement mixture includes the following steps：
(1) sludge in sludge canopy is delivered in blender by conveyer, be added flyash, tailing bauxite and
Dihydrate gypsum is allowed to uniformly mixed, and wet mud batch mixing is made；
(2) wet mud batch mixing is delivered to by conveyer in dryer, high temperature drying is carried out to batch mixing at 800 DEG C
40min makes the moisture content ＜ 20% of sludge, and dry sludge batch mixing is made；
(3) above-mentioned drying sludge batch mixing is delivered to by conveyer in tapping a blast furnace equipment, then in calcining furnace 1100
DEG C to batch mixing carry out high-temperature calcination 90min, give full play to the activity of the oxides such as calcium in sludge, aluminium, then discharging and in cooling
The sludge base cement mixture is made in chilling in machine, is stored in finished product heap canopy.
Embodiment 3
Raw material components：110 parts of sludge, 30 parts of flyash, 20 parts of tailing bauxite, 20 parts of dihydrate gypsum.
The method that the present invention prepares sludge base cement mixture includes the following steps：
(1) sludge in sludge canopy is delivered in blender by conveyer, be added flyash, tailing bauxite and
Dihydrate gypsum is allowed to uniformly mixed, and wet mud batch mixing is made；
(2) wet mud batch mixing is delivered to by conveyer in dryer, high temperature drying is carried out to batch mixing at 800 DEG C
40min makes the moisture content ＜ 20% of sludge, and dry sludge batch mixing is made；
(3) above-mentioned drying sludge batch mixing is delivered to by conveyer in tapping a blast furnace equipment, then in calcining furnace 1100
DEG C to batch mixing carry out high-temperature calcination 120min, give full play to the activity of the oxides such as calcium in sludge, aluminium, then discharging and in cooling
The sludge base cement mixture is made in chilling in machine, is stored in finished product heap canopy.
According to GBT17671-1999 Test method for strength of hydraulic cement mortar (ISO methods), sludge base prepared by above-described embodiment
Cement mixture performance is measured, and the ratio of wherein sludge base cement mixture replacement cement is fixed as 30%, the knot of acquisition
Fruit is as shown in table 1 below.
1 cement mechanical property of table
By table 1 it is found that the present invention uses cement mixture prepared by sludge, compression strength can reach 50MPa within 28 days
Left and right, flexural strength can reach 8MPa or so, and compression strength and flexural strength significantly improve.
Comparative example 1
Basic step is same as Example 1, the difference is that the Feedstock Component content in sludge base cement mixture, tool
Body is：30 parts of 100 parts of sludge, 20 parts of flyash, 30 parts of tailing bauxite and dihydrate gypsum.
Preparation method is same as Example 1.
Comparative example 2
Basic step is same as Example 1, the difference is that the Feedstock Component content in sludge base cement mixture, tool
Body is：5 parts of 100 parts of sludge, 60 parts of flyash, 5 parts of tailing bauxite and dihydrate gypsum.
Preparation method is same as Example 1.
Sludge base cement mixture performance prepared by comparative example 1 and comparative example 2 is measured, the result such as following table of acquisition
Shown in 2.
2 cement mechanical property of table
By table 2 it is found that using 90~110 parts of sludge, 30~50 parts of flyash, 10~20 parts of tailing bauxite and two water
The compression strength and flexural strength of the mixing material of 10~20 parts of preparations of gypsum are higher, mixing material prepared by comparative example 1 and comparative example 2
Compression strength and flexural strength it is poor, this is because flyash addition so that mud granulizing is insufficient when less, influence dirt
The drying efficiency of mud when industrial gypsum addition is less, can cause C in the cement mixture4A3The forming amount of S is reduced, and is reduced
Its gelation activity.
Comparative example 3
Basic step is same as Example 1, the difference is that not adding flyash in raw material.Specially：Sludge 100
20 parts of part, 20 parts of tailing bauxite and dihydrate gypsum.
Comparative example 4
Basic step is same as Example 1, the difference is that not adding tailing bauxite in raw material.Specially：Sludge
15 parts of 90 parts, 35 parts of flyash and dihydrate gypsum.
Comparative example 5
Basic step is same as Example 1, the difference is that not adding dihydrate gypsum in raw material.Specially：Sludge 90
15 parts of part, 35 parts of flyash and tailing bauxite.
Mixing material prepared by comparative example 3-5 carries out performance detection, and the result of acquisition is as shown in table 3 below.
3 cement mechanical property of table
By table 3 it is found that the mixing material that the present invention prepares sludge, flyash, tailing bauxite and dihydrate gypsum compounding
Bending strength of cement and compression strength can be effectively improved, if being added without flyash then so that mud granulizing is insufficient, is influenced
The drying efficiency of sludge, is added without tailing bauxite and dihydrate gypsum it will cause lacking enough sa raw materials in raw material,
So that C in mixing material4A3The forming amount of S is reduced, and reduces its gelation activity.
Embodiment 4
6 groups of parallel tests are designed, basic step is same as Example 1, the difference is that the temperature of calcining, respectively
700 DEG C, 800 DEG C, 900 DEG C, 1000 DEG C, 1100 DEG C, 1200 DEG C, the mixing material of preparation is subjected to performance detection respectively, acquisition
As a result as shown in the following table 4 and table 5.
Strength of cement prepared by the different calcination temperature of table 4
Bending strength of cement prepared by the different calcination temperature of table 5
By table 4 and table 5 it is found that it is 800~1100 DEG C that the present invention, which selectes calcination temperature, the mixing material of preparation can be effective
Improve bending strength of cement and compression strength.If temperature is relatively low, can cause to react insufficient between each raw material component；If warm
It spends higher so that the cement mixture mineral facies tend to inertia, are unfavorable for its aquation.
Embodiment 5
5 groups of parallel tests are designed, basic step is same as Example 1, the difference is that the time of calcining, respectively
The mixing material of preparation is carried out performance detection by 70min, 80min, 100min, 1200min, 130min respectively, and the result of acquisition is such as
Shown in the following table 6 and table 7.
Strength of cement prepared by the different calcination time of table 6
Bending strength of cement prepared by the different calcination time of table 7
By table 6 and table 7 it is found that it is 80~120min that the present invention, which selectes calcination time, the mixing material of preparation can be effective
Improve bending strength of cement and compression strength.If calcination time is partially short, can cause to react insufficient between each raw material component；If
If temperature is partially long so that the cement mixture mineral facies tend to inertia, are unfavorable for its aquation.
The flyash grain size that the present invention uses is 5~75 μm, including SiO250~65%, Al2O315~40%, CaO 1
~4% and surplus Fe2O3.Tailing bauxite includes Al2O350~60%, SiO220~35%, Fe2O33~5% and surplus
CaO.Dihydrate gypsum can be replaced semi-hydrated gypsum or anhydrous gypsum.The sludge of use is derived from Jiangsu Province's Yancheng City south of a city sewage disposal
Factory, flyash, tailing bauxite and industrial gypsum are purchased from Nanjing Jia Qi flyash Co., Ltd, Henan Li Te refractory materials respectively
Co., Ltd, Jiangsu EFFUL New Material Technology Science and Technology Co., Ltd.
Claims (7)
1. a kind of sludge base cement mixture, it is characterised in that include the following raw material in parts by weight：90~110 parts of sludge, powder
10~20 parts of 30~50 parts of coal ash, 10~20 parts of tailing bauxite and industrial gypsum.
2. sludge base cement mixture according to claim 1, it is characterised in that：The flyash grain size is 5~75 μm.
3. sludge base cement mixture according to claim 1, it is characterised in that：The flyash includes by mass fraction
SiO250~65%, Al2O315~40%, CaO 1~4% and surplus Fe2O3。
4. sludge base cement mixture according to claim 1, it is characterised in that：The tailing bauxite presses mass fraction
Including Al2O350~60%, SiO220~35%, Fe2O33~5% and surplus CaO.
5. sludge base cement mixture according to claim 1, it is characterised in that：The industrial gypsum be dihydrate gypsum,
Semi-hydrated gypsum or anhydrous gypsum.
6. a kind of method preparing sludge base cement mixture described in claim 1, it is characterised in that include the following steps：It presses
After parts by weight dry sludge, flyash, tailing bauxite and industrial gypsum mix, calcined under the conditions of 800~1100 DEG C
80~120min, cooling can be prepared by the cement mixture.
7. the preparation method of sludge base cement mixture according to claim 6, it is characterised in that：It is described drying be
40~70min is dried under the conditions of 600~800 DEG C.
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| CN201810540780.7A CN108558245A (en) | 2018-05-30 | 2018-05-30 | A kind of sludge base cement mixture and preparation method thereof |
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| CN201810540780.7A CN108558245A (en) | 2018-05-30 | 2018-05-30 | A kind of sludge base cement mixture and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112960919A (en) * | 2021-01-28 | 2021-06-15 | 成都市嘉瑞云建材有限公司 | Method for preparing cement mixed material by using sand washing sludge |
| CN115259885A (en) * | 2022-08-11 | 2022-11-01 | 镇江市雅盛节能环保材料有限公司 | Bauxite tailing sintered ceramsite and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112960919A (en) * | 2021-01-28 | 2021-06-15 | 成都市嘉瑞云建材有限公司 | Method for preparing cement mixed material by using sand washing sludge |
| CN115259885A (en) * | 2022-08-11 | 2022-11-01 | 镇江市雅盛节能环保材料有限公司 | Bauxite tailing sintered ceramsite and preparation method thereof |
| CN115259885B (en) * | 2022-08-11 | 2023-08-01 | 镇江市雅盛节能环保材料有限公司 | Bauxite tailing sintered ceramsite and preparation method thereof |
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Effective date of registration: 20191203 Address after: 224011 West Jingyi Road, Anshu Industrial Park, Longgang Town, Yandu District, Yancheng City, Jiangsu Province (f) Applicant after: Jiangsu chengrenda environmental protection equipment Co., Ltd Address before: 224011 west suburb industrial park, Yancheng City, Jiangsu Applicant before: Yancheneg Chengxin Cement Machinery Manufacturing Co., Ltd. |
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Application publication date: 20180921 |