CN112279529A - Method for improving silicon and aluminum content in sintered cement by using converter steel slag - Google Patents
Method for improving silicon and aluminum content in sintered cement by using converter steel slag Download PDFInfo
- Publication number
- CN112279529A CN112279529A CN202011248558.3A CN202011248558A CN112279529A CN 112279529 A CN112279529 A CN 112279529A CN 202011248558 A CN202011248558 A CN 202011248558A CN 112279529 A CN112279529 A CN 112279529A
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- CN
- China
- Prior art keywords
- steel slag
- converter steel
- sintering
- sintered
- mixture
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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
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- 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
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- 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
-
- 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
- C04B7/47—Cooling ; Waste heat management
-
- 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
- C04B7/52—Grinding ; After-treatment of ground cement
-
- 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 method for improving the content of silicon and aluminum in sintered cement by using converter steel slag, which comprises the following steps: adding clay into the converter steel slag raw material to prepare a mixture; respectively weighing the qualified raw materials, homogenizing and mixing to prepare; drying the mixed and prepared mixture until the water content is less than 6%; feeding the dried mixture into a grinding system; feeding the ball-milled mixture into a sintering system for sintering, controlling the sintering temperature at 1000-1300 ℃, and processing the mixture into clinker to finish the construction process of adding clay into the converter steel slag in one batch for modifying and sintering the converter steel slag into cement; quickly cooling the sintered material to below 80 ℃, and crushing; and feeding the cooled crushed materials into a grinding system to obtain the sintered cement. The preparation method provided by the invention is low in cost, can improve the content of silicon and aluminum in the converter steel slag, and effectively solves the problem of low content of silicon and aluminum in the prior art.
Description
Technical Field
The invention relates to the technical field of cement preparation, in particular to a method for improving the content of silicon and aluminum in sintered cement by using converter steel slag.
Background
The converter steel slag is liquid slag generated by a slagging process in a converter, the temperature is up to 1600 ℃, the gradual dissolving process of lime in the slag is mainly adopted, and finally silicate slag containing a large amount of solid solution phase SS is obtained. Wherein the solid solution phase SS is a solid material comprising one or more solutes.
In the smelting process, a certain amount of slag-making materials such as lime and the like are added according to the requirements of a steel-making process, and finally, the produced converter steel slag contains silicate with gelling property, but because the content of each oxide component is different from that of cement, including different forming processes, the content and the quality of the silicate are not as good as those of cement clinker. Wherein tricalcium silicate (C)3S) content is generally 3-5% and is lower than clinker by 50%, so that the strength of early steel slag is lower than that of cement clinker; dicalcium silicate (C)2S) the content is generally about 40 percent and higher than that of cement clinker, and the content of the cement clinker is generally about 20 percent, so that the later strength of the steel slag is higher than that of the cement clinker; ferrite and SS phases are as high as 50%, affecting their gelling properties. The cement sintering process uses limestone and clay as main raw materials, and the clinker with calcium silicate as a main component is obtained by high-temperature calcination at 1450 ℃ in 1300-class, wherein the main components of the clinker are tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite. Therefore, the converter steel slag belongs to 'over-burnt low-quality clinker'.
The converter steel slag contains a certain amount of silicate, but because the content of silicon dioxide is low, C is caused3S is lower and C2Too many S and SS phases; in addition, most of the liquid phase state in the converter, the crystallization speed is higher and the development is more complete, so that the activity is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method for improving the silicon and aluminum contents in the sintered cement by using the converter steel slag, the preparation method is low in cost, the silicon and aluminum contents in the converter steel slag can be improved, and the problem of low silicon and aluminum contents in the prior art is effectively solved.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the method for improving the content of silicon and aluminum in the sintered cement by using the converter steel slag comprises the following steps:
(1) preparing materials: adding clay into the converter steel slag raw material to prepare a mixture of the converter steel slag and the clay in a mass ratio of 100: 5-55; wherein, the clay is a mineral raw material containing potassium and calcium and prepared from alumina and silicon dioxide, and the sintered rock phase structure of the clay is potassium feldspar, anorthite and quartz;
(2) mixing: respectively weighing the qualified raw materials, homogenizing and mixing to prepare;
(3) drying: drying the mixed and prepared mixture until the water content is less than 6%;
(4) ball milling: feeding the dried mixture into a grinding system, wherein the fineness of the mixture reaches 0.072mm, and the residue of a square-hole sieve is 8%;
(5) and (3) sintering: feeding the ball-milled mixture into a sintering system for sintering, controlling the sintering temperature at 1000-1300 ℃, and processing the mixture into clinker to finish the construction process of adding clay into the converter steel slag in one batch for modifying and sintering the converter steel slag into cement;
(6) and (3) cooling: quickly cooling the sintered material to below 80 ℃, and then crushing the sintered material to below 20 mm;
(7) grinding: and feeding the cooled crushed materials into a grinding system, wherein the fineness reaches 0.072mm, and the residue of the square-hole sieve is 8%, so as to obtain the sintered cement.
Further, in the step (1), the mass ratio of the converter steel slag to the clay is 100: 18.
Further, in the step (2), the particle sizes of the converter steel slag and the clay are respectively less than 20mm and 10 mm.
Furthermore, the sintered clinker contains 33-60% of CaO and SiO218％-30％、Al2O3 4％-10％、Fe2O34% -25% and MgO 5% -15％。
In summary, the invention has the following advantages:
1. the preparation method provided by the invention is low in cost, can improve the content of silicon and aluminum in the converter steel slag, and effectively solves the problem of low content of silicon and aluminum in the prior art.
2. After clay is added into the converter steel slag to prepare a mixture meeting the requirements, the converter steel slag is subjected to the processes of proportioning, mixing, drying, grinding, sintering, cooling, grinding and the like, so that converter steel slag waste containing a certain amount of silicate generated in the existing metallurgical production process can be produced into cement clinker, and the reutilization of the converter steel slag waste and other metallurgical waste containing a certain amount of silicate is realized. The quantity of abandonment tails can be reduced, the storage space of depositing the abandonment tails is practiced thrift, the productivity effect can be improved again, the production environment can also be optimized.
Detailed Description
Example 1
A method for improving the contents of silicon and aluminum in sintered cement by using converter steel slag comprises the following steps:
(1) preparing materials: adding clay into the converter steel slag raw material to prepare a mixture of the converter steel slag and the clay in a mass ratio of 100: 18; wherein, the clay is a mineral raw material containing potassium and calcium and prepared from alumina and silicon dioxide, and the sintered rock phase structure of the clay is potassium feldspar, anorthite and quartz;
(2) mixing: respectively weighing the qualified raw materials, homogenizing and mixing to prepare; the particle sizes of the converter steel slag and the clay are respectively less than 20mm and 10 mm;
(3) drying: drying the mixed and prepared mixture until the water content is less than 6%;
(4) ball milling: feeding the dried mixture into a grinding system, wherein the fineness of the mixture reaches 0.072mm, and the residue of a square-hole sieve is 8%;
(5) and (3) sintering: feeding the ball-milled mixture into a sintering system for sintering, controlling the sintering temperature at 1000-1300 ℃, and processing the mixture into clinker to finish the construction process of adding clay into the converter steel slag in one batch for modifying and sintering the converter steel slag into cement;
(6) and (3) cooling: quickly cooling the sintered material to below 80 ℃, and then crushing the sintered material to below 20 mm;
(7) grinding: and feeding the cooled crushed materials into a grinding system, wherein the fineness reaches 0.072mm, and the residue of the square-hole sieve is 8%, so as to obtain the sintered cement.
In the above embodiment, in order to improve the production efficiency and the quality of the cement clinker produced by the above method, in the step (1), the mass ratio of the converter steel slag to the clay is 100: 18; mixing in the step (2), weighing the qualified raw materials respectively, homogenizing and mixing to prepare; drying, namely drying the mixed material prepared by mixing until the moisture content is less than 6%; ball milling, namely feeding the dried mixture into a grinding system, wherein the fineness reaches 8% of the residue of a square-hole sieve with the fineness of 0.072 mm; sintering, wherein the ground mixture is fed into a sintering system for sintering, the sintering temperature is controlled to be 1000-1300 ℃, and the cement is processed into clinker, so that the construction process of adding clay into the converter steel slag in one batch, modifying and sintering the converter steel slag into cement is completed; cooling, namely rapidly cooling the materials obtained by sintering to 80 ℃, and crushing the materials to be less than 20 mm; and (3) grinding, namely feeding the cooled crushed materials into a grinding system, wherein the fineness reaches 8% of the residue of a square-hole sieve with the fineness of 0.072 mm. In the step (2), the particle sizes of the converter steel slag and the clay are respectively 10mm and 3 mm. The chemical components of the sintered clinker are CaO (35 percent) and SiO2(26％)、Al2O3(4％)、Fe2O3(20％)、MgO(9％)。
Example 2
A method for improving the contents of silicon and aluminum in sintered cement by using converter steel slag comprises the following steps:
(1) preparing materials: adding clay into the converter steel slag raw material to prepare a mixture of the converter steel slag and the clay in a mass ratio of 100: 20; wherein, the clay is a mineral raw material containing potassium and calcium and prepared from alumina and silicon dioxide, and the sintered rock phase structure of the clay is potassium feldspar, anorthite and quartz;
(2) mixing: respectively weighing the qualified raw materials, homogenizing and mixing to prepare; the particle sizes of the converter steel slag and the clay are respectively less than 20mm and 10 mm;
(3) drying: drying the mixed and prepared mixture until the water content is less than 6%;
(4) ball milling: feeding the dried mixture into a grinding system, wherein the fineness of the mixture reaches 0.072mm, and the residue of a square-hole sieve is 8%;
(5) and (3) sintering: feeding the ball-milled mixture into a sintering system for sintering, controlling the sintering temperature at 1000-1300 ℃, and processing the mixture into clinker to finish the construction process of adding clay into the converter steel slag in one batch for modifying and sintering the converter steel slag into cement;
(6) and (3) cooling: quickly cooling the sintered material to below 80 ℃, and then crushing the sintered material to below 20 mm;
(7) grinding: and feeding the cooled crushed materials into a grinding system, wherein the fineness reaches 0.072mm, and the residue of the square-hole sieve is 8%, so as to obtain the sintered cement.
While the present invention has been described in detail with reference to the specific embodiments thereof, it should not be construed as limited by the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (4)
1. A method for improving the contents of silicon and aluminum in sintered cement by using converter steel slag is characterized by comprising the following steps:
(1) preparing materials: adding clay into the converter steel slag raw material to prepare a mixture of the converter steel slag and the clay in a mass ratio of 100: 5-55; wherein, the clay is a mineral raw material containing potassium and calcium and prepared from alumina and silicon dioxide, and the sintered rock phase structure of the clay is potassium feldspar, anorthite and quartz;
(2) mixing: respectively weighing the qualified raw materials, homogenizing and mixing to prepare;
(3) drying: drying the mixed and prepared mixture until the water content is less than 6%;
(4) ball milling: feeding the dried mixture into a grinding system, wherein the fineness of the mixture reaches 0.072mm, and the residue of a square-hole sieve is 8%;
(5) and (3) sintering: feeding the ball-milled mixture into a sintering system for sintering, controlling the sintering temperature at 1000-1300 ℃, and processing the mixture into clinker to finish the construction process of adding clay into the converter steel slag in one batch for modifying and sintering the converter steel slag into cement;
(6) and (3) cooling: quickly cooling the sintered material to below 80 ℃, and then crushing the sintered material to below 20 mm;
(7) grinding: and feeding the cooled crushed materials into a grinding system, wherein the fineness reaches 0.072mm, and the residue of the square-hole sieve is 8%, so as to obtain the sintered cement.
2. The method for increasing the content of silicon and aluminum in the sintered cement by using the converter steel slag according to claim 1, wherein in the step (1), the mass ratio of the converter steel slag to the clay is 100: 18.
3. The method for increasing the content of Si and Al in the sintered cement using converter steel slag according to claim 1, wherein in the step (2), the particle sizes of the converter steel slag and the clay are respectively less than 20mm and 10 mm.
4. The method for increasing the contents of silicon and aluminum in the sintered cement by using the converter steel slag as claimed in claim 1, wherein the chemical components and the contents thereof in the clinker after sintering are CaO 33% -60% and SiO218％-30％、Al2O3 4％-10％、Fe2O34% -25% and MgO 5% -15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248558.3A CN112279529A (en) | 2020-11-10 | 2020-11-10 | Method for improving silicon and aluminum content in sintered cement by using converter steel slag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011248558.3A CN112279529A (en) | 2020-11-10 | 2020-11-10 | Method for improving silicon and aluminum content in sintered cement by using converter steel slag |
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| CN112279529A true CN112279529A (en) | 2021-01-29 |
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| CN202011248558.3A Pending CN112279529A (en) | 2020-11-10 | 2020-11-10 | Method for improving silicon and aluminum content in sintered cement by using converter steel slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014569A (en) * | 2021-11-15 | 2022-02-08 | 吴联权 | Production process for separating and recycling metal smelting furnace slag |
| CN116924704A (en) * | 2023-07-19 | 2023-10-24 | 浙江福瑞再生资源开发股份有限公司 | Prefabricated stainless steel slag, cement setting material prepared from prefabricated stainless steel slag and lime plastic material |
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| JP2012197197A (en) * | 2011-03-22 | 2012-10-18 | Dc Co Ltd | Method for producing cement clinker |
| CN104098283A (en) * | 2014-08-06 | 2014-10-15 | 攀枝花钢城集团有限公司 | Construction method for sintering cement by use of converter steel slag |
| CN109851242A (en) * | 2019-03-29 | 2019-06-07 | 湖南省道同环保科技有限公司 | A kind of steel slag method of modifying |
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2020
- 2020-11-10 CN CN202011248558.3A patent/CN112279529A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5284513A (en) * | 1992-10-22 | 1994-02-08 | Shell Oil Co | Cement slurry and cement compositions |
| JP2012197197A (en) * | 2011-03-22 | 2012-10-18 | Dc Co Ltd | Method for producing cement clinker |
| CN104098283A (en) * | 2014-08-06 | 2014-10-15 | 攀枝花钢城集团有限公司 | Construction method for sintering cement by use of converter steel slag |
| CN109851242A (en) * | 2019-03-29 | 2019-06-07 | 湖南省道同环保科技有限公司 | A kind of steel slag method of modifying |
Non-Patent Citations (1)
| Title |
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| 郭辉: "转炉钢渣形成过程及改性方法", 《中国硅酸盐学会水泥分会首届学术年会论文集》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014569A (en) * | 2021-11-15 | 2022-02-08 | 吴联权 | Production process for separating and recycling metal smelting furnace slag |
| CN114014569B (en) * | 2021-11-15 | 2022-08-02 | 吴联权 | Production process for separating and recycling metal smelting furnace slag |
| CN116924704A (en) * | 2023-07-19 | 2023-10-24 | 浙江福瑞再生资源开发股份有限公司 | Prefabricated stainless steel slag, cement setting material prepared from prefabricated stainless steel slag and lime plastic material |
| CN116924704B (en) * | 2023-07-19 | 2024-02-06 | 浙江福瑞再生资源开发股份有限公司 | Prefabricated stainless steel slag, cement setting material prepared from prefabricated stainless steel slag and lime plastic material |
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