CN109534708B - Preparation method of concrete admixture - Google Patents
Preparation method of concrete admixture Download PDFInfo
- Publication number
- CN109534708B CN109534708B CN201811554949.0A CN201811554949A CN109534708B CN 109534708 B CN109534708 B CN 109534708B CN 201811554949 A CN201811554949 A CN 201811554949A CN 109534708 B CN109534708 B CN 109534708B
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- CN
- China
- Prior art keywords
- blast furnace
- furnace slag
- converter steel
- titanium blast
- concrete admixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Details (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a preparation method of a concrete admixture, relates to the field of cement, and solves the technical problem of providing a preparation method of a concrete admixture taking high-titanium blast furnace slag and converter steel slag as raw materials, wherein the preparation method adopts the following technical scheme: the preparation method of the concrete admixture comprises the following steps: s1, respectively crushing, screening and magnetically separating the high-titanium blast furnace slag and the converter steel slag to obtain high-titanium blast furnace slag powder and converter steel slag powder; s2, mixing the high titanium type blast furnace slag powder with the converter steel slag powder to prepare a mixture; and S3, grinding the mixture to obtain the concrete admixture. The concrete admixture is prepared by taking the high-titanium blast furnace slag as a main raw material, adding the converter steel slag, supplementing active ingredients such as tricalcium silicate, dicalcium silicate and the like, diluting and dispersing free calcium oxide in the steel slag, eliminating the problem of local expansion of the free calcium oxide, improving the activity of the high-titanium blast furnace slag, and improving the gelling performance of the high-titanium blast furnace slag and the converter steel slag in concrete.
Description
Technical Field
The invention relates to the field of cement, in particular to a preparation method of a concrete admixture taking high-titanium blast furnace slag and converter steel slag as raw materials.
Background
The activity of the high titanium blast furnace slag is not high, generally about 55 percent, and the high titanium blast furnace slag has better construction performance when used as a concrete admixture, but has obvious difference in activity compared with fly ash, and cannot be directly used as the concrete admixture. The inherent reasons are: the content of calcium silicate in the high-titanium blast furnace slag is low, so that the activity of the high-titanium blast furnace slag is influenced.
On the other hand, according to the requirements of the steel-making process, a certain amount of slag-making materials such as lime and the like need to be added in the smelting process, and finally, the produced converter steel slag contains silicate with gelling property. Tricalcium silicate (C) in converter slag3S) content of 3-5%, dicalcium silicate (C)2S) content is about 40%, so the converter steel slag has higher activity which can reach 80%.
The high-titanium blast furnace slag and the converter steel slag have few applications and are often used as waste slag, but beneficial components exist in the high-titanium blast furnace slag and the converter steel slag, so that the high-titanium blast furnace slag and the converter steel slag are changed into valuable materials and the application of the high-titanium blast furnace slag and the converter steel slag is expanded, for example, the high-titanium blast furnace slag and the converter steel slag are prepared into cement admixtures, and the high-titanium blast furnace slag and the converter steel slag are requirements for fully utilizing mineral resources and realizing development of green development of iron and steel enterprises.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a concrete admixture taking high-titanium blast furnace slag and converter steel slag as raw materials.
The technical scheme adopted by the invention is as follows: the preparation method of the concrete admixture comprises the following steps:
s1, crushing, screening and magnetically separating the high-titanium blast furnace slag to obtain high-titanium blast furnace slag powder with the grain size of 0-15 mm and the content of metallic iron of less than 1%; crushing, screening and magnetically separating the converter steel slag to obtain converter steel slag powder with the particle size of 0-15 mm and the content of metallic iron of less than 1%;
s2, mixing the high-titanium blast furnace slag powder with the converter steel slag powder to prepare a mixture, wherein the mass of the high-titanium blast furnace slag powder accounts for 50-90% of the mass of the mixture;
and S3, controlling the water content of the mixture not to exceed 3%, and then grinding the mixture to obtain the concrete admixture.
Specifically, the method comprises the following steps: in the step S3, the mixture is ground until the fineness reaches 325 meshes.
Specifically, the method comprises the following steps: in the step S3, the water requirement ratio of the concrete admixture is less than or equal to 105, the content of free calcium oxide is less than or equal to 1.0 percent, and the loss on ignition is less than or equal to 8.0 percent.
The invention has the beneficial effects that: the preparation method of the concrete admixture takes the high-titanium blast furnace slag as a main raw material, supplements active ingredients such as tricalcium silicate, dicalcium silicate and the like by adding a proper amount of converter steel slag, and simultaneously dilutes and disperses free calcium oxide in the steel slag, thereby eliminating the problem of local expansion of the free calcium oxide, improving the activity of the high-titanium blast furnace slag, and improving the gelling performance of the high-titanium blast furnace slag and the converter steel slag in concrete, thereby preparing the better concrete admixture. The invention better realizes the utilization of the waste slag, expands the application of the high titanium blast furnace slag and the converter steel slag and conforms to the concept of green economic development.
Detailed Description
The present invention is further described below.
The preparation method of the concrete admixture comprises the following steps:
s1, crushing, screening and magnetically separating the high-titanium blast furnace slag to obtain high-titanium blast furnace slag powder with the grain size of 0-15 mm and the content of metallic iron of less than 1%; crushing, screening and magnetically separating the converter steel slag to obtain converter steel slag powder with the particle size of 0-15 mm and the content of metallic iron of less than 1%.
S2, mixing the high-titanium blast furnace slag powder with the converter steel slag powder to prepare a mixture; wherein the mass of the high titanium type blast furnace slag powder accounts for 50-90% of the mass of the mixture.
And S3, controlling the water content of the mixture not to exceed 3%, and then grinding the mixture to obtain the concrete admixture. The water content of the mixture is controlled not to exceed 3 percent, so that the mixture is convenient to grind through a ball mill. And grinding to obtain fine powder, namely the concrete admixture. For example, after grinding, the concrete admixture is obtained by sieving the ground material through a 325-mesh sieve and then drying the sieved material in the sun.
Examples
The preparation method of the concrete admixture comprises the steps of firstly, respectively crushing, screening and magnetically separating the high-titanium blast furnace slag and the converter steel slag to obtain high-titanium high-filter residue powder and converter steel slag powder with the particle size of 0-15 mm and the metal iron content of less than 1%. Secondly, mixing the high-titanium type high-filter residue powder and the converter steel slag powder to prepare a mixture, wherein the mass of the high-titanium type blast furnace slag accounts for 50% of the mass of the mixture. And thirdly, controlling the water content of the mixture not to exceed 3%, grinding the mixture, and obtaining the concrete admixture after the fineness reaches 325 meshes after grinding. Through detection, the water requirement ratio of the concrete admixture is 102, the content of free calcium oxide is 0.1 percent, and the loss on ignition is 5.9 percent.
Claims (1)
1. The preparation method of the concrete admixture is characterized by comprising the following steps: the method comprises the following steps:
s1, crushing, screening and magnetically separating the high-titanium blast furnace slag to obtain high-titanium blast furnace slag powder with the grain size of 0-15 mm and the content of metallic iron of less than 1%; crushing, screening and magnetically separating the converter steel slag to obtain converter steel slag powder with the particle size of 0-15 mm and the content of metallic iron of less than 1%;
s2, mixing the high-titanium blast furnace slag powder with the converter steel slag powder to prepare a mixture, wherein the mass of the high-titanium blast furnace slag powder accounts for 50-90% of the mass of the mixture;
s3, controlling the water content of the mixture not to exceed 3%, and then grinding the mixture until the fineness reaches 325 meshes to prepare the concrete admixture with the water demand ratio not more than 105, the free calcium oxide content not more than 1.0% and the loss on ignition not more than 8.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554949.0A CN109534708B (en) | 2018-12-19 | 2018-12-19 | Preparation method of concrete admixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554949.0A CN109534708B (en) | 2018-12-19 | 2018-12-19 | Preparation method of concrete admixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109534708A CN109534708A (en) | 2019-03-29 |
| CN109534708B true CN109534708B (en) | 2022-04-08 |
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| CN201811554949.0A Active CN109534708B (en) | 2018-12-19 | 2018-12-19 | Preparation method of concrete admixture |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698100A (en) * | 2019-11-12 | 2020-01-17 | 攀枝花环业冶金渣开发有限责任公司 | Method for using slag of slag steel iron electric furnace as concrete admixture |
| CN110947515A (en) * | 2019-12-17 | 2020-04-03 | 攀枝花钢城集团有限公司 | Method for preparing fine-fraction steel slag used as admixture of cement and concrete |
| CN115368036A (en) * | 2022-08-30 | 2022-11-22 | 攀枝花钢城集团有限公司 | Doping material for reducing water-soluble hexavalent chromium of cement and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343174A (en) * | 2013-07-11 | 2013-10-09 | 东北大学 | Method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag |
| CN104446021A (en) * | 2014-11-26 | 2015-03-25 | 攀枝花环业冶金渣开发有限责任公司 | Steel and iron slag micro-powder and production method thereof |
| KR101699012B1 (en) * | 2015-10-29 | 2017-01-23 | 에코엔텍 주식회사 | The soil fill materials using product of industry |
| CN108059371A (en) * | 2017-12-26 | 2018-05-22 | 攀枝花钢城集团有限公司 | It is a kind of to add tricalcium silicate to improve the method for converter slag activity |
-
2018
- 2018-12-19 CN CN201811554949.0A patent/CN109534708B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343174A (en) * | 2013-07-11 | 2013-10-09 | 东北大学 | Method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag |
| CN104446021A (en) * | 2014-11-26 | 2015-03-25 | 攀枝花环业冶金渣开发有限责任公司 | Steel and iron slag micro-powder and production method thereof |
| KR101699012B1 (en) * | 2015-10-29 | 2017-01-23 | 에코엔텍 주식회사 | The soil fill materials using product of industry |
| CN108059371A (en) * | 2017-12-26 | 2018-05-22 | 攀枝花钢城集团有限公司 | It is a kind of to add tricalcium silicate to improve the method for converter slag activity |
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| CN109534708A (en) | 2019-03-29 |
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