KR20110091170A - Clinker using steel sludge and municipal solid waste incineration fly ash and method for manufacturing the same - Google Patents
Clinker using steel sludge and municipal solid waste incineration fly ash and method for manufacturing the same Download PDFInfo
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- KR20110091170A KR20110091170A KR1020100010879A KR20100010879A KR20110091170A KR 20110091170 A KR20110091170 A KR 20110091170A KR 1020100010879 A KR1020100010879 A KR 1020100010879A KR 20100010879 A KR20100010879 A KR 20100010879A KR 20110091170 A KR20110091170 A KR 20110091170A
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- South Korea
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- clinker
- fly ash
- waste incineration
- steel sludge
- sludge
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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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
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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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
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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
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treatment Of Sludge (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention relates to a clinker using a steel sludge and municipal waste incineration fly ash and a method for manufacturing the same, and to a clinker and a method for manufacturing the same produced by mixing and firing steel sludge, domestic waste incineration fly ash and gypsum at a specific ratio.
Clinker according to the present invention can be produced by using the steel sludge, a by-product of the steel industry as a main raw material can produce a clinker excellent in fast hardness, high strength, high flowability and expandability, can be recycled steel sludge to reduce the purchase cost of raw materials Not only is it economically superior, it also has the effect of solving the environmental pollution problem by reducing waste.
Description
The present invention relates to a clinker using a steel sludge and municipal waste incineration fly ash and a method for manufacturing the same, and to a clinker and a method for manufacturing the same produced by mixing and firing steel sludge, domestic waste incineration fly ash and gypsum at a specific ratio.
Clinker (clinker) is a cement material, will the source material is fired into small chunks by a rotary kiln (rotary kiln), a main component is a 3CaO · SiO 2, 3CaO · Al 2 O 3, 2CaO · SiO 2, 4CaO · Al 2 O of 3 · Fe 2 O 3 is in four species. Alumina calcium sulfoaluminate (CSA) clinker, which is one of the conventional clinkers, uses alumina minerals such as bauxite, limestone and gypsum as raw materials.
CSA cement has an expansive, fast-hardening, and roughness by mixing an appropriate amount of anhydrous gypsum (CaSO 4 ) and quicklime (CaO) in a clinker whose main components are CaO, Al 2 O 3 , SiO 2 , and SO 3 . It acts as a special cement. Commonly used portland cement clinker is calcined at a high temperature of about 1,450 ℃, and the main compound has a composition mineral of C 3 S, C 2 S, C 3 A, C 4 AF, and calcium silicate (Calcium silicate) when hydrated. hydrate (CSH) and calcium hydroxide (Calcium dihydroxide: Ca (OH) 2 ) are produced. However, in case of C 4 A 3 (CSA) clinker, the firing temperature is around 1,200 ~ 1,300 ℃, and it is not only energy saving cement which is 100 ~ 200 ℃ lower than that of ordinary portland cement (OPC) but also fast hardness, high strength, high flowability and expandability. It can compensate for the defects of various special cement fields and traditional cement. Hauyne mineral C 4 A 3 clinker has a basic chemical composition of CaO-Al 2 O 3 -SO 3 system, and the product contains C 4 A 3 , C 4 AF and β-C 2 S depending on the raw materials used. It can be fired with a clinker. Cement containing C 4 A 3 as a main component has roughness when the Al 2 O 3 component is large, high strength when the SO 3 component is large, and expandability when the CaO component is large, depending on the composition of the mixture of CaSO 4 and CaO.
CSA-based expanded cements having such characteristics are edringite (C 3 A · 3CaSO 4 · 32H 2 O) and monosulfate (C 3 A · CaSO 4 · 12H) in acicular and columnar phases after hydration with water after pouring. It exhibits an expansion effect due to the generation of hydrates such as 2 O) and Ca (OH) 2 to prevent cracking of the cured product due to dry shrinkage, which is a disadvantage of OPC, and to improve low tensile strength.
However, since clinker, which is a cement raw material, uses natural resources as a raw material, as supply of natural resources gradually depletes, supply and demand inevitably arises. have.
On the other hand, in Korea, the steel industry accounts for a large portion of the entire industry, and a large amount of wastes including sludge are generated. Steel sludge, etc., which is not recycled and landfilled, is likely to pollute the surrounding environment even if it is landfilled, and has serious problems such as soil pollution. In addition, the treatment of sludge involves enormous costs, which leads to an increase in manufacturing cost, thereby deteriorating a company's competitiveness.
Generally, steelmaking by-products are classified into slag (blast furnace slag, steelmaking slag), sludge (steelmaking sludge, lime sludge, cold rolled and hot rolled sludge, after-treatment sludge, drainage sludge, playing sludge), dust (sintered R). / EP dust, sintered W / EP dust, lime B / F dust, steelmaking E / P dust, steelmaking B / F dust) and incineration residues. These by-products are composed of Si0 2 , Al 2 O 3 , Fe 2 O 3 , CaO, MgO, Na 2 O, K 2 O, TiO 2 , P 2 O 5 , Cr 2 O 3 , MnO, C and the like.
Therefore, the recycling of steelmaking by-products is required to prevent environmental pollution and to improve national competitiveness, which requires a lot of research and active use.
Accordingly, the present inventors have made diligent efforts to recycle steelmaking by-products. When manufacturing clinker, when steel sludge, which is a byproduct of the steelmaking industry, is used as a raw material, the average firing temperature is low, the energy saving ratio is high, and the recycling rate of steelmaking by-products is significantly increased. It was confirmed that the present invention was completed.
SUMMARY OF THE INVENTION An object of the present invention is to provide a fast hardening, high strength, high fluidity and expandability of a clinker prepared by mixing steel sludge, which is one of steel by-products, and municipal waste incineration fly ash and gypsum in a fixed ratio, and a method of manufacturing the same. have.
The present invention, (a) 100% by weight of steel sludge, 20 to 50% by weight of municipal waste incineration fly ash, 10-30% by weight of gypsum; And (b) it provides a method for producing a clinker using a steel sludge and municipal waste incineration fly ash comprising the step of firing the mixture at 1000 ~ 1300 ℃.
The present invention also provides a clinker prepared by the above method and containing 20 to 50% by weight of household waste incineration fly ash and 10 to 30% by weight of gypsum, based on 100% by weight of steel sludge.
Clinker according to the present invention can be produced by using the steel sludge, a by-product of the steel industry as a main raw material can produce a clinker excellent in fast hardness, high strength, high flowability and expandability, can be recycled steel sludge to reduce the purchase cost of raw materials Not only is it economically superior, it also has the effect of solving the environmental pollution problem by reducing waste.
1 shows a process diagram of a method of manufacturing a clinker according to the present invention.
In accordance with the present invention, a) a step of mixing 20 to 50% by weight of domestic waste incineration fly ash, 10 to 30% by weight with respect to 100% by weight of steel sludge; And (b) firing the mixture at 1000 to 1300 ° C., and a method for producing a clinker using steel sludge and municipal waste incineration fly ash.
In the present invention, steel sludge is sludge generated in an ironworks, and chemical components contained in steel sludge are shown in Table 1 below.
Since the steel sludge contains a lot of moisture, it is used by heating it at a high temperature so that the moisture content is less than 10%.
In the present invention, the municipal waste incinerator remains after incineration of domestic waste, and the chemical composition is shown in Table 2 below.
The municipal waste incineration fly ash is washed with water at a temperature of 5-50 ° C. at least once with a fly ash: water ratio of 1:10 to 1: 1 while injecting carbonic acid ions into the incinerator generated from the municipal waste incinerator to be used as a raw material for cement. By removing the chlorine component and heavy metal harmful components can be used.
Due to this, the hazardous substances are stabilized during incineration, and the calcination temperature is 100-200 ° C lower than that of general Portland cement due to the large amount of chlorine, and the fastness is good, and the expansion rate is good, so that no crack is generated. Can be used as
In the present invention, gypsum is used to neutralize the alkali component, alkali components such as K 2 O or Na 2 O contained in the waste to increase the viscosity of the liquid phase during clinker firing process to lower the clinker quality, The alkali component causes volatilization and condensation inside the calciner repeatedly, which causes the calcining process to become unstable.
Therefore, in consideration of this point, gypsum is added which can neutralize the alkali component in the clinker raw material. At this time, gypsum is characterized in that it contains 10 to 30% by weight relative to 100% by weight of steel sludge, when less than 10% by weight, there is a problem that the quality of the clinker is lowered because the alkali component is not neutralized, 30% by weight If it contains more than% there is a problem that the manufacturing cost increases.
The gypsum is characterized in that it is selected from the group comprising phosphate phosphate, titanium gypsum, flue gas desulfurization gypsum, natural gypsum and anhydrous gypsum, but is not limited thereto.
In another aspect, the present invention relates to a clinker produced by the above method, using steel sludge and municipal waste incineration fly ash.
The clinker according to the present invention contains steel sludge, municipal waste incineration fly ash and gypsum, and its firing temperature is 100 to 200 ° C. lower than that of the conventional Portland cement, and has excellent characteristics of fastness, high strength, high flowability, and expandability.
Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these examples are for illustrative purposes only and that the scope of the present invention is not construed as being limited by these examples.
Preparation of Clinker According to the Method of the Invention
30 parts by weight of domestic waste incineration fly ash and 10 parts by weight of gypsum phosphate are weighed out to 100 parts by weight of steel sludge produced at Pohang Works, and then pulverized to a raw material particle size of 80 µm and mixed uniformly using a mixer. The clinker was prepared by calcination and holding at a firing temperature of 1200 ° C. for 1 hour and then air cooling.
As a result, since the clinker can be manufactured at a lower temperature than the conventional cement clinker, energy can be saved, waste can be recycled, and environmental pollution can be prevented.
Having described the specific parts of the invention in detail, it will be apparent to those skilled in the art that these specific descriptions are merely preferred embodiments, and the scope of the present invention is not limited thereby. . Thus, the substantial scope of the present invention will be defined by the appended claims and their equivalents.
Claims (3)
(a) mixing 20-50% by weight of household waste incineration fly ash and 10-30% by weight of gypsum with respect to 100% by weight of steel sludge; And
(b) calcining the mixture at 1000 to 1300 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100010879A KR20110091170A (en) | 2010-02-05 | 2010-02-05 | Clinker using steel sludge and municipal solid waste incineration fly ash and method for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100010879A KR20110091170A (en) | 2010-02-05 | 2010-02-05 | Clinker using steel sludge and municipal solid waste incineration fly ash and method for manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20110091170A true KR20110091170A (en) | 2011-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020100010879A KR20110091170A (en) | 2010-02-05 | 2010-02-05 | Clinker using steel sludge and municipal solid waste incineration fly ash and method for manufacturing the same |
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| KR (1) | KR20110091170A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101143435B1 (en) * | 2011-11-11 | 2012-05-22 | (주)유성테크 | Admixtures, concrete composition and cement mortar composition using thereof |
| CN104016602A (en) * | 2014-06-27 | 2014-09-03 | 淮安市楚城水泥有限公司 | Preparation method using industrial waste residue titanium gypsum as cement component |
| CN104926162A (en) * | 2015-06-15 | 2015-09-23 | 华南理工大学 | Low-carbon ordinary Portland cement and manufacturing method thereof |
| KR101702418B1 (en) * | 2016-06-17 | 2017-02-03 | 주식회사 경흥아이앤씨 | Cement alternative with Waste Aluminium Powder and manufacturing method thereof |
| CN113372029A (en) * | 2021-07-21 | 2021-09-10 | 攀钢冶金材料有限责任公司 | Low-carbon type super-sulfate cement, preparation method thereof and cement mortar |
| KR102454093B1 (en) * | 2022-08-19 | 2022-10-17 | 주식회사 위드엠텍 | Raw Composition for Eco Cement Clinker, Eco Cement Clinker Using the Raw Composition and The Eco Cement |
-
2010
- 2010-02-05 KR KR1020100010879A patent/KR20110091170A/en not_active Application Discontinuation
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101143435B1 (en) * | 2011-11-11 | 2012-05-22 | (주)유성테크 | Admixtures, concrete composition and cement mortar composition using thereof |
| CN104016602A (en) * | 2014-06-27 | 2014-09-03 | 淮安市楚城水泥有限公司 | Preparation method using industrial waste residue titanium gypsum as cement component |
| CN104926162A (en) * | 2015-06-15 | 2015-09-23 | 华南理工大学 | Low-carbon ordinary Portland cement and manufacturing method thereof |
| KR101702418B1 (en) * | 2016-06-17 | 2017-02-03 | 주식회사 경흥아이앤씨 | Cement alternative with Waste Aluminium Powder and manufacturing method thereof |
| CN113372029A (en) * | 2021-07-21 | 2021-09-10 | 攀钢冶金材料有限责任公司 | Low-carbon type super-sulfate cement, preparation method thereof and cement mortar |
| KR102454093B1 (en) * | 2022-08-19 | 2022-10-17 | 주식회사 위드엠텍 | Raw Composition for Eco Cement Clinker, Eco Cement Clinker Using the Raw Composition and The Eco Cement |
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