CN111847927A - Preparation method of cement clinker taking waste building blocks as main raw materials - Google Patents
Preparation method of cement clinker taking waste building blocks as main raw materials Download PDFInfo
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- CN111847927A CN111847927A CN202010715523.XA CN202010715523A CN111847927A CN 111847927 A CN111847927 A CN 111847927A CN 202010715523 A CN202010715523 A CN 202010715523A CN 111847927 A CN111847927 A CN 111847927A
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- CN
- China
- Prior art keywords
- building blocks
- waste
- cement clinker
- waste building
- main raw
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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
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
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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
- C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
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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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a preparation method of cement clinker taking waste building blocks as main raw materials. The waste building blocks are wide in raw material source and low in cost, urban building garbage can be effectively utilized, and the strength of cement clinker can be remarkably improved by adopting organosilane modified graphene as a modifier, so that the waste building blocks meet the national industrial requirements of energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a preparation method of cement clinker taking waste building blocks as main raw materials.
Background
The building block is a block-shaped building product which is larger than the body of the clay brick. The raw materials have wide sources, various varieties, local materials and low price. The size of the product can be divided into three types, namely large, medium and small. At present, China mainly produces small and medium-sized building blocks. The block is middle in size when the block is 380-940 mm high, and small in size when the block is less than 380mm high. The building blocks are divided into concrete, cement mortar, aerated concrete, fly ash silicate, coal gangue, artificial ceramsite, slag waste and the like according to the materials. The building blocks are divided into compact and hollow building blocks according to the structure, and the hollow building blocks comprise hollow building blocks such as round holes, square holes, elliptical holes, single-row holes and multi-row holes. The compact or hollow building blocks can be used as bearing walls and partitions. China is one of the countries with the earlier building blocks, and in the 30 s of the 20 th century, the houses are built by small hollow building blocks in Shanghai. In the 50 s, cement, sandstone, slag, lime and the like are used to produce small and medium-sized building blocks in Beijing, Shanghai and other places. Fly ash silicate medium-sized building blocks are made by using fly ash, lime, gypsum, slag and the like in Shanghai in the 60 s, meanwhile, a building block forming machine and a light lifting appliance are developed, and the development of building block construction is promoted.
At present, building blocks are widely applied to various fields of building construction, partition walls, even hydraulic engineering and the like, but due to the low cost of the building blocks, the recycling of wastes is always a difficult point of building waste utilization, so that a preparation method of cement clinker taking waste building blocks as main raw materials needs to be researched.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a preparation method of cement clinker by using waste building blocks as main raw materials.
The technical scheme of the invention is as follows:
a preparation method of cement clinker taking waste building blocks as main raw materials comprises the following steps:
A. repeatedly crushing the waste building blocks by adopting a weight squeezing method, and sieving the crushed waste building blocks by a 120-mesh sieve to obtain waste building block fine powder;
B. adding a modifier and water into the fly ash and the waste building block fine powder, uniformly stirring, and then passing through a granulator to obtain modified particles;
C. drying the modified particles until the water content is 10-15%, mixing with limestone and gypsum to obtain raw material, grinding to obtain raw material powder with a 80 μm square-hole sieve residue of 8-12%;
D. firing at 1120 +/-50 ℃ for 40-60min to obtain the cement clinker.
Preferably, in the step a, the waste building blocks are prepared from the following main raw materials: cement, polystyrene particles, a water reducing agent, fly ash, gypsum and silica sand.
Further preferably, the cement content in the waste building blocks is not lower than 20%.
Preferably, in the step B, the modifier is graphene modified by organosilane.
Further preferably, the preparation method of the organosilane modified graphene refers to chinese patent CN 102153877A.
Preferably, in the cement clinker, the weight percentage of each raw material is as follows: 65-80% of waste building blocks, 8-15% of fly ash, 0.5-1.2% of modifier, 5-8% of limestone and the balance of gypsum.
The invention has the advantages that: the cement clinker takes waste building blocks as main raw materials, and also comprises fly ash, limestone, gypsum and a small amount of modifier. The waste building blocks are wide in raw material source and low in cost, urban building garbage can be effectively utilized, and the strength of cement clinker can be remarkably improved by adopting organosilane modified graphene as a modifier, so that the waste building blocks meet the national industrial requirements of energy conservation and emission reduction.
Detailed Description
Example 1
A preparation method of cement clinker taking waste building blocks as main raw materials comprises the following steps:
A. repeatedly crushing the waste building blocks by adopting a weight squeezing method, and sieving the crushed waste building blocks by a 120-mesh sieve to obtain waste building block fine powder;
B. adding a modifier and water into the fly ash and the waste building block fine powder, uniformly stirring, and then passing through a granulator to obtain modified particles;
C. drying the modified particles until the water content is 12.5%, mixing with limestone and gypsum to prepare raw material, grinding to obtain raw material powder with the screen residue of a 80-micron square-hole sieve of 10%;
D. firing at 1125 deg.C for 55min to obtain cement clinker.
In the step A, the waste building blocks are prepared from the following main raw materials: cement, polystyrene particles, a water reducing agent, fly ash, gypsum and silica sand. The cement content in the waste building blocks is 25.7%.
In the step B, the modifier is organosilane modified graphene. The preparation method of the organosilane modified graphene refers to the embodiment 1 of the Chinese patent CN 102153877A.
In the cement clinker, the weight percentage of each raw material is as follows: 78% of waste building blocks, 12% of fly ash, 1.1% of modifier, 5.5% of limestone and the balance of gypsum.
Example 2
A preparation method of cement clinker taking waste building blocks as main raw materials comprises the following steps:
A. repeatedly crushing the waste building blocks by adopting a weight squeezing method, and sieving the crushed waste building blocks by a 120-mesh sieve to obtain waste building block fine powder;
B. adding a modifier and water into the fly ash and the waste building block fine powder, uniformly stirring, and then passing through a granulator to obtain modified particles;
C. drying the modified particles until the water content is 15%, mixing with limestone and gypsum to prepare raw material, grinding until the screen residue of a 80-micron square-hole sieve is 8%, and preparing raw material powder;
D. firing at 1170 ℃ for 40min to obtain the cement clinker.
In the step A, the waste building blocks are prepared from the following main raw materials: cement, polystyrene particles, a water reducing agent, fly ash, gypsum and silica sand. The cement content in the waste building blocks is 27.2%.
In the step B, the modifier is organosilane modified graphene. The preparation method of the organosilane modified graphene refers to the embodiment 1 of the Chinese patent CN 102153877A.
In the cement clinker, the weight percentage of each raw material is as follows: 80% of waste building blocks, 8% of fly ash, 1.2% of modifier, 5% of limestone and the balance of gypsum.
Example 3
A preparation method of cement clinker taking waste building blocks as main raw materials comprises the following steps:
A. repeatedly crushing the waste building blocks by adopting a weight squeezing method, and sieving the crushed waste building blocks by a 120-mesh sieve to obtain waste building block fine powder;
B. adding a modifier and water into the fly ash and the waste building block fine powder, uniformly stirring, and then passing through a granulator to obtain modified particles;
C. drying the modified particles until the water content is 10%, mixing with limestone and gypsum to prepare raw material, grinding until the screen residue of a 80-micron square-hole sieve is 12%, and preparing raw material powder;
D. firing at 1070 deg.C for 60min to obtain cement clinker.
In the step A, the waste building blocks are prepared from the following main raw materials: cement, polystyrene particles, a water reducing agent, fly ash, gypsum and silica sand. The cement content in the waste building blocks is 20.2%.
In the step B, the modifier is organosilane modified graphene. The preparation method of the organosilane modified graphene refers to the embodiment 1 of the Chinese patent CN 102153877A.
In the cement clinker, the weight percentage of each raw material is as follows: 65% of waste building blocks, 15% of fly ash, 0.5% of modifier, 8% of limestone and the balance of gypsum.
Example 4
A preparation method of cement clinker taking waste building blocks as main raw materials comprises the following steps:
A. repeatedly crushing the waste building blocks by adopting a weight squeezing method, and sieving the crushed waste building blocks by a 120-mesh sieve to obtain waste building block fine powder;
B. adding a modifier and water into the fly ash and the waste building block fine powder, uniformly stirring, and then passing through a granulator to obtain modified particles;
C. drying the modified particles until the water content is 11.5%, mixing with limestone and gypsum to prepare raw material, grinding to obtain raw material powder with the screen residue of a 80-micron square-hole sieve of 11.2%;
D. firing at 1170 ℃ for 60min to obtain the cement clinker.
In the step A, the waste building blocks are prepared from the following main raw materials: cement, polystyrene particles, a water reducing agent, fly ash, gypsum and silica sand. The cement content in the waste building blocks is 22.9 percent.
In the step B, the modifier is organosilane modified graphene. The preparation method of the organosilane modified graphene refers to the embodiment 1 of the Chinese patent CN 102153877A.
In the cement clinker, the weight percentage of each raw material is as follows: 72% of waste building blocks, 10% of fly ash, 1.0% of modifier, 6% of limestone and the balance of gypsum.
Example 5
A preparation method of cement clinker taking waste building blocks as main raw materials comprises the following steps:
A. repeatedly crushing the waste building blocks by adopting a weight squeezing method, and sieving the crushed waste building blocks by a 120-mesh sieve to obtain waste building block fine powder;
B. adding a modifier and water into the fly ash and the waste building block fine powder, uniformly stirring, and then passing through a granulator to obtain modified particles;
C. drying the modified particles until the water content is 10%, mixing with limestone and gypsum to prepare raw material, grinding until the screen residue of a 80-micron square-hole sieve is 12%, and preparing raw material powder;
D. firing at 1110 ℃ for 55min to obtain the cement clinker.
In the step A, the waste building blocks are prepared from the following main raw materials: cement, polystyrene particles, a water reducing agent, fly ash, gypsum and silica sand. The cement content in the waste building blocks is 23.6%.
In the step B, the modifier is organosilane modified graphene. The preparation method of the organosilane modified graphene refers to the embodiment 1 of the Chinese patent CN 102153877A.
In the cement clinker, the weight percentage of each raw material is as follows: 77% of waste building blocks, 10% of fly ash, 0.8% of modifier, 6.5% of limestone and the balance of gypsum.
Comparative example 1
The organosilane-modified graphene in example 1 was replaced with the same amount of organosilane and unmodified graphene, and the rest of the formulation and preparation method were unchanged.
The cement clinker prepared in examples 1-5 and comparative example 1 was tested as follows (test method GB/T17671-1999), and the specific results are shown in Table 1.
Table 1: test data for cement clinker prepared in examples 1 to 5 and comparative example 1;
the test data show that the cement clinker prepared by the invention not only has high strength, but also has large specific surface area, and can be widely applied to the urban construction process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A preparation method of cement clinker taking waste building blocks as main raw materials is characterized by comprising the following steps:
A. repeatedly crushing the waste building blocks by adopting a weight squeezing method, and sieving the crushed waste building blocks by a 120-mesh sieve to obtain waste building block fine powder;
B. adding a modifier and water into the fly ash and the waste building block fine powder, uniformly stirring, and then passing through a granulator to obtain modified particles;
C. drying the modified particles until the water content is 10-15%, mixing with limestone and gypsum to obtain raw material, grinding to obtain raw material powder with a 80 μm square-hole sieve residue of 8-12%;
D. firing at 1120 +/-50 ℃ for 40-60min to obtain the cement clinker.
2. The method for preparing cement clinker using waste blocks as main raw materials according to claim 1, wherein in the step a, the waste blocks are prepared from the following main raw materials: cement, polystyrene particles, a water reducing agent, fly ash, gypsum and silica sand.
3. The method for preparing cement clinker using waste blocks as main raw material according to claim 2, wherein the content of cement in the waste blocks is not less than 20%.
4. The method for producing cement clinker using waste blocks as main raw material according to claim 1, wherein in the step B, the modifier is graphene modified with organic silane.
5. The method for preparing cement clinker using waste blocks as main raw material according to claim 4, wherein the method for preparing organosilane-modified graphene refers to the Chinese patent CN 102153877A.
6. The method for preparing cement clinker using waste building blocks as main raw materials according to claim 1, wherein the cement clinker comprises the following raw materials in percentage by weight: 65-80% of waste building blocks, 8-15% of fly ash, 0.5-1.2% of modifier, 5-8% of limestone and the balance of gypsum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010715523.XA CN111847927A (en) | 2020-07-23 | 2020-07-23 | Preparation method of cement clinker taking waste building blocks as main raw materials |
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| CN202010715523.XA CN111847927A (en) | 2020-07-23 | 2020-07-23 | Preparation method of cement clinker taking waste building blocks as main raw materials |
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| CN202010715523.XA Pending CN111847927A (en) | 2020-07-23 | 2020-07-23 | Preparation method of cement clinker taking waste building blocks as main raw materials |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1248885A (en) * | 1969-03-06 | 1971-10-06 | Chemie Linz Ag | Manufacture of cement clinker |
| CN101274824A (en) * | 2008-05-14 | 2008-10-01 | 重庆大学 | Cement clinker and preparation thereof |
| CN102153877A (en) * | 2011-02-22 | 2011-08-17 | 中国科学技术大学 | Graphene composite material and preparation method thereof |
| CN103848581A (en) * | 2012-12-07 | 2014-06-11 | 王凤英 | Cement clinker and preparation method thereof |
| CN105254193A (en) * | 2015-10-30 | 2016-01-20 | 东北大学 | Preparation method for cement and cement clinker by taking waste as raw material |
| CN107010855A (en) * | 2017-05-02 | 2017-08-04 | 山东鲁珠集团有限公司 | The formula and preparation method of clinker are made using mixing plant solid waste |
| CN107602072A (en) * | 2017-10-31 | 2018-01-19 | 广西旭腾实业集团有限公司 | A kind of water-permeable brick based on graphene and solid-state castoff and preparation method thereof |
| CN108218263A (en) * | 2016-12-21 | 2018-06-29 | 大连理工大学 | A kind of cement slurry prepared using discarded concrete full constituent |
| CN110342838A (en) * | 2019-07-11 | 2019-10-18 | 济南大学 | A kind of preparation method and application of high thermal conductivity clinker and its cement products |
-
2020
- 2020-07-23 CN CN202010715523.XA patent/CN111847927A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1248885A (en) * | 1969-03-06 | 1971-10-06 | Chemie Linz Ag | Manufacture of cement clinker |
| CN101274824A (en) * | 2008-05-14 | 2008-10-01 | 重庆大学 | Cement clinker and preparation thereof |
| CN102153877A (en) * | 2011-02-22 | 2011-08-17 | 中国科学技术大学 | Graphene composite material and preparation method thereof |
| CN103848581A (en) * | 2012-12-07 | 2014-06-11 | 王凤英 | Cement clinker and preparation method thereof |
| CN105254193A (en) * | 2015-10-30 | 2016-01-20 | 东北大学 | Preparation method for cement and cement clinker by taking waste as raw material |
| CN108218263A (en) * | 2016-12-21 | 2018-06-29 | 大连理工大学 | A kind of cement slurry prepared using discarded concrete full constituent |
| CN107010855A (en) * | 2017-05-02 | 2017-08-04 | 山东鲁珠集团有限公司 | The formula and preparation method of clinker are made using mixing plant solid waste |
| CN107602072A (en) * | 2017-10-31 | 2018-01-19 | 广西旭腾实业集团有限公司 | A kind of water-permeable brick based on graphene and solid-state castoff and preparation method thereof |
| CN110342838A (en) * | 2019-07-11 | 2019-10-18 | 济南大学 | A kind of preparation method and application of high thermal conductivity clinker and its cement products |
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Application publication date: 20201030 |
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