CN110255941A - A kind of desulfurized gypsum reuse method - Google Patents

A kind of desulfurized gypsum reuse method Download PDF

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Publication number
CN110255941A
CN110255941A CN201910685570.1A CN201910685570A CN110255941A CN 110255941 A CN110255941 A CN 110255941A CN 201910685570 A CN201910685570 A CN 201910685570A CN 110255941 A CN110255941 A CN 110255941A
Authority
CN
China
Prior art keywords
desulfurized gypsum
slag
follows
wet slag
granulated blast
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.)
Pending
Application number
CN201910685570.1A
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Chinese (zh)
Inventor
胡高飞
宋立宾
崔克燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Laigang Yongfeng Steel and Iron Co Ltd
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Shandong Laigang Yongfeng Steel and Iron Co Ltd
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Filing date
Publication date
Application filed by Shandong Laigang Yongfeng Steel and Iron Co Ltd filed Critical Shandong Laigang Yongfeng Steel and Iron Co Ltd
Priority to CN201910685570.1A priority Critical patent/CN110255941A/en
Publication of CN110255941A publication Critical patent/CN110255941A/en
Pending legal-status Critical Current

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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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a kind of desulfurized gypsum reuse methods, and desulfurized gypsum is added to wet slag and is prepared in ground granulated blast furnace slag process, mixed ground granulated blast furnace slag；Before the mixed ground granulated blast furnace slag preparation, to desulfurized gypsum and wet slag is ground and data comparison, specifically: A, sample drying；B, it is crushed, mixing and C, each self-grind acquisition grinding data simultaneously compare, desulfurized gypsum reuse method of the invention, produce not influencing just to generate, utilize desulfurized gypsum under the premise of not reducing ground granulated blast furnace slag quality；Requirements of the national standard is fully achieved in the product of preparation, has very high utility value in the utilization of cement, mortar and concrete and uses meaning.

Description

A kind of desulfurized gypsum reuse method
Technical field
The present invention relates to the waste utilization techniques in a kind of steelmaking process, and in particular to a kind of desulfurized gypsum recycling side Method belongs to the waste utilization technology field in steelmaking process.
Background technique
Desulfurized gypsum is sulfur removal technology byproduct, and country's recycling and reusing is low at present, few mainly by pad ditch, pad road Number for cement mixing adjust cement setting time, improve strength of cement, such as Chinese Patent Application No.: 200810030651.X the desulfurization gypsum slurrying batching method in manufacture of cement, belongs to technical field of cement production.Starchiness and Powdered desulfurized gypsum is all not easy to the use of cement plant measuring belt scale ingredient.The invention is characterized in that desulfurized gypsum and water Charge ratio (weight) are as follows: desulfurized gypsum: water=1: 1 ~ 5, according to charge ratio, sticky desulfurized gypsum and water are launched to stirring Mixed diluting in machine, is stirred with blender, and the desulfurized gypsum dilution for meeting concentration requirement is made；Desulfurized gypsum dilution With the charge ratio (weight) of clinker are as follows: desulfurized gypsum dilution: clinker=1: 4 ~ 8, according to charge ratio, shape will be stirred It is ripe that desulfurized gypsum dilution under state by slush pump conveying, by flowmeter regime flow and by nozzle is ejected into cement On material, but since the desulfurized gypsum moisture of steel plant's discharge is larger, outward transport utilization rate is relatively low, and normal time accumulation is caused to cause ring Border pollution.
Summary of the invention
To solve the above problems, passing through desulfurized gypsum and wet mine the invention proposes a kind of desulfurized gypsum reuse method Slag co-ground makes ground granulated blast furnace slag, and meeting its finished product, " GB/T 18046-2017 is for cement, mortar and mixes Ground granulated blast furnace slag in solidifying soil " technical requirements.
Desulfurized gypsum is added to wet slag and prepares ground granulated blast furnace slag work by desulfurized gypsum reuse method of the invention In sequence, mixed ground granulated blast furnace slag.
Further, the wet slag and desulfurized gypsum weight ratio are as follows: 10:1.
Further, the wet slag, desulfurized gypsum and desulfurized gypsum weight ratio are as follows: 10:5:1.
Further, before the mixed ground granulated blast furnace slag preparation, to desulfurized gypsum and wet slag grinding and data Comparison.
Further, the grinding and data comparison are specific as follows:
A, sample is dried；Before grinding, desulfurized gypsum and wet slag are put into 105 DEG C of drying boxes and dried；
B, it is crushed, mixing, after completing drying, then desulfurized gypsum is sent into jaw crusher and breakage is carried out to roller, cross 5mm square hole Sieve makes its granularity whole≤5mm, completes to mix well in feeding V-type batch mixer after being sieved；
C, each self-grind acquisition grinding data simultaneously compare, specific as follows:
A, wet slag 5000g grinds 120min；Inspection data is as follows: density 2.9g/cm3, specific surface area 450m2/ kg, 7d is living Sex index: 95%, 28 days activity indexs 110%, presetting periods are than 119%, chloride ion: 0.03%, loss on ignition: 0.4%, insoluble matter: 0.1%, sulfur trioxide: 0.2%, fluidity ratio: 103%；
B, wet slag 5000g, desulfurized gypsum 500g grind 120min；Inspection data density 3.3g/cm3, specific surface area 468m2/ Kg, 7d activity index: 100%, 28 days activity indexs 106%, presetting periods are than 115%, chloride ion: 0.04%, loss on ignition: 0.8%, Insoluble matter: 0.3%, sulfur trioxide: 0.6%, fluidity ratio: 110%；
C, wet slag 5000g, desulfurized gypsum 1000g grind 120min；Inspection data are as follows: density 3.7g/cm3, specific surface area 480m2/ kg, 7d activity index: 107%, 28 days activity indexs 110%, presetting periods are than 111%, chloride ion: 0.05%, loss on ignition: 0.9%, insoluble matter: 0.7%, sulfur trioxide: 0.9%, fluidity ratio: 108%；
D, wet slag 5000g, desulfurized gypsum 500g grind 110min.Inspection data are as follows: density 3.3g/cm3, specific surface area 445m2/ kg, 7d activity index: 96%, 28 days activity indexs 108%, presetting periods are than 115%, chloride ion: 0.04%, loss on ignition: 0.8%, insoluble matter: 0.3%, sulfur trioxide: 0.6%, fluidity ratio: 110%.
Compared with prior art, desulfurized gypsum reuse method of the invention is not influencing just to generate production, no the present invention Desulfurized gypsum is utilized under the premise of reducing ground granulated blast furnace slag quality；Requirements of the national standard is fully achieved in the product of preparation, There is very high utility value in cement, mortar and concrete utilization and uses meaning.
Specific embodiment
Desulfurized gypsum is added to wet slag and prepares ground granulated blast furnace slag work by desulfurized gypsum reuse method of the invention In sequence, mixed ground granulated blast furnace slag.
In another embodiment, the wet slag and desulfurized gypsum weight ratio are as follows: 10:1.
In another embodiment, the wet slag, desulfurized gypsum and desulfurized gypsum weight ratio are as follows: 10:5:1.
Wherein, before the mixed ground granulated blast furnace slag preparation, to desulfurized gypsum and wet slag grinding and data comparison； The grinding and data comparison are specific as follows:
A, sample is dried；Before grinding, desulfurized gypsum and wet slag are put into 105 DEG C of drying boxes and dried；
B, it is crushed, mixing, after completing drying, then desulfurized gypsum is sent into jaw crusher and breakage is carried out to roller, cross 5mm square hole Sieve makes its granularity whole≤5mm, completes to mix well in feeding V-type batch mixer after being sieved；
C, each self-grind acquisition grinding data simultaneously compare, specific as follows:
A, wet slag 5000g grinds 120min；Inspection data is as follows: density 2.9g/cm3, specific surface area 450m2/ kg, 7d is living Sex index: 95%, 28 days activity indexs 110%, presetting periods are than 119%, chloride ion: 0.03%, loss on ignition: 0.4%, insoluble matter: 0.1%, sulfur trioxide: 0.2%, fluidity ratio: 103%；
B, wet slag 5000g, desulfurized gypsum 500g grind 120min；Inspection data density 3.3g/cm3, specific surface area 468m2/ Kg, 7d activity index: 100%, 28 days activity indexs 106%, presetting periods are than 115%, chloride ion: 0.04%, loss on ignition: 0.8%, Insoluble matter: 0.3%, sulfur trioxide: 0.6%, fluidity ratio: 110%；
C, wet slag 5000g, desulfurized gypsum 1000g grind 120min；Inspection data are as follows: density 3.7g/cm3, specific surface area 480m2/ kg, 7d activity index: 107%, 28 days activity indexs 110%, presetting periods are than 111%, chloride ion: 0.05%, loss on ignition: 0.9%, insoluble matter: 0.7%, sulfur trioxide: 0.9%, fluidity ratio: 108%；
D, wet slag 5000g, desulfurized gypsum 500g grind 110min.Inspection data are as follows: density 3.3g/cm3, specific surface area 445m2/ kg, 7d activity index: 96%, 28 days activity indexs 108%, presetting periods are than 115%, chloride ion: 0.04%, loss on ignition: 0.8%, insoluble matter: 0.3%, sulfur trioxide: 0.6%, fluidity ratio: 110%.
Above-described embodiment is only better embodiment of the invention, therefore all according to structure described in present patent application range It makes, the equivalent change or modification that feature and principle are done, is included in the scope of the patent application of the present invention.

Claims (5)

1. a kind of desulfurized gypsum reuse method, it is characterised in that: desulfurized gypsum is added to wet slag and prepares granulated blast-furnace mine In ground-slag process, mixed ground granulated blast furnace slag.
2. desulfurized gypsum reuse method according to claim 1, it is characterised in that: the wet slag and desulfurized gypsum weight Measure ratio are as follows: 10:1.
3. desulfurized gypsum reuse method according to claim 1, it is characterised in that: the wet slag, desulfurized gypsum and Desulfurized gypsum weight ratio are as follows: 10:5:1.
4. desulfurized gypsum reuse method according to claim 1, it is characterised in that: the mixed granulated blast-furnace slag Before powder preparation, to desulfurized gypsum and wet slag grinding and data comparison.
5. desulfurized gypsum reuse method according to claim 4, it is characterised in that: the grinding and data comparison are specific It is as follows:
A, sample is dried；Before grinding, desulfurized gypsum and wet slag are put into 105 DEG C of drying boxes and dried；
B, it is crushed, mixing, after completing drying, then desulfurized gypsum is sent into jaw crusher and breakage is carried out to roller, cross 5mm square hole Sieve makes its granularity whole≤5mm, completes to mix well in feeding V-type batch mixer after being sieved；
C, each self-grind acquisition grinding data simultaneously compare, specific as follows:
A, wet slag 5000g grinds 120min；Inspection data is as follows: density 2.9g/cm3, specific surface area 450m2/ kg, 7d activity Index: 95%, 28 days activity indexs 110%, presetting periods are than 119%, chloride ion: 0.03%, loss on ignition: 0.4%, insoluble matter: 0.1%, sulfur trioxide: 0.2%, fluidity ratio: 103%；
B, wet slag 5000g, desulfurized gypsum 500g grind 120min；Inspection data density 3.3g/cm3, specific surface area 468m2/ Kg, 7d activity index: 100%, 28 days activity indexs 106%, presetting periods are than 115%, chloride ion: 0.04%, loss on ignition: 0.8%, Insoluble matter: 0.3%, sulfur trioxide: 0.6%, fluidity ratio: 110%；
C, wet slag 5000g, desulfurized gypsum 1000g grind 120min；Inspection data are as follows: density 3.7g/cm3, specific surface area 480m2/ kg, 7d activity index: 107%, 28 days activity indexs 110%, presetting periods are than 111%, chloride ion: 0.05%, loss on ignition: 0.9%, insoluble matter: 0.7%, sulfur trioxide: 0.9%, fluidity ratio: 108%；
D, wet slag 5000g, desulfurized gypsum 500g grind 110min；Inspection data are as follows: density 3.3g/cm3, specific surface area 445m2/ kg, 7d activity index: 96%, 28 days activity indexs 108%, presetting periods are than 115%, chloride ion: 0.04%, loss on ignition: 0.8%, insoluble matter: 0.3%, sulfur trioxide: 0.6%, fluidity ratio: 110%.
CN201910685570.1A 2019-07-27 2019-07-27 A kind of desulfurized gypsum reuse method Pending CN110255941A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008179504A (en) * 2007-01-24 2008-08-07 Nippon Steel Corp Blast furnace slag cement
CN101450846A (en) * 2007-11-30 2009-06-10 上海宝田新型建材有限公司 Composite type slag powder and production method thereof
CN107572852A (en) * 2017-11-07 2018-01-12 广东韶钢嘉羊新型材料有限公司 A kind of production method of high-performance ground granulated blast furnace slag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008179504A (en) * 2007-01-24 2008-08-07 Nippon Steel Corp Blast furnace slag cement
CN101450846A (en) * 2007-11-30 2009-06-10 上海宝田新型建材有限公司 Composite type slag powder and production method thereof
CN107572852A (en) * 2017-11-07 2018-01-12 广东韶钢嘉羊新型材料有限公司 A kind of production method of high-performance ground granulated blast furnace slag

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Application publication date: 20190920