CN113336496A - Coal gasification furnace slag cementing material assisted by strong salt wastewater in coal chemical industry and preparation method thereof - Google Patents

Coal gasification furnace slag cementing material assisted by strong salt wastewater in coal chemical industry and preparation method thereof Download PDF

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Publication number
CN113336496A
CN113336496A CN202110577213.0A CN202110577213A CN113336496A CN 113336496 A CN113336496 A CN 113336496A CN 202110577213 A CN202110577213 A CN 202110577213A CN 113336496 A CN113336496 A CN 113336496A
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gasification furnace
furnace slag
coal gasification
coal
cementing material
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吴锋
李辉
白云
马旭东
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Priority to CN202110577213.0A priority Critical patent/CN113336496A/en
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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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • 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
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/065—Residues from coal gasification
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/002—Water
    • C04B22/0046—Waste slurries or solutions used as gauging water
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • 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)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

The invention discloses a coal gasification furnace slag cementing material assisted by strong salt wastewater in coal chemical industry and a preparation method thereof, belonging to the technical field of comprehensive utilization of industrial solid wastes; the raw materials of the cementing material comprise: the coal gasification furnace comprises a solid raw material, an alkali activator and mixing water, wherein the solid raw material is coal gasification furnace slag and cement, and the mixing water comprises water and coal chemical industry concentrated salt wastewater in a weight ratio of (0-3) to 1; mixing the coal gasification furnace slag, an alkali activator, cement and mixing water to obtain the cementing material; the cementing material prepared by the invention has high compressive strength, particularly high early strength; the invention takes the coal gasification furnace slag as the main raw material, solves the problems of land occupation and environmental pollution caused by coal gasification furnace slag discharge, and has positive environmental benefit; the popularization and application of the cementing material can effectively reduce the usage amount of the cement-based inorganic cementing material, further reduce the consumption of resources and energy sources in cement production, and is beneficial to environmental protection.

Description

Coal gasification furnace slag cementing material assisted by strong salt wastewater in coal chemical industry and preparation method thereof
Technical Field
The invention belongs to the technical field of comprehensive utilization of industrial solid wastes, and particularly relates to a coal gasification furnace slag cementing material assisted by strong salt wastewater in coal chemical industry and a preparation method thereof.
Background
The coal gasification furnace slag is industrial solid waste discharged in the coal chemical industry process, and the novel coal chemical industry process of taking coal as a raw material and converting the coal into a product for replacing petroleum or petrochemical industry through chemical deep processing mainly comprises coal-to-oil, coal-to-olefin, coal-to-natural gas, coal-to-ethylene glycol, coal-to-dimethyl ether and the like. The demand for energy sources such as petroleum and natural gas is rapidly increased, so that a large amount of coal gasification furnace slag is generated, and strong salt wastewater in the coal chemical industry is generated at the same time. These wastes and waste waters pose serious environmental problems if they cannot be effectively disposed of and utilized. Under the condition, how to realize the harmless treatment and resource utilization of the coal chemical industry waste residues and wastewater with huge production quantity has important significance for the green sustainable development and ecological environment protection of the coal chemical industry.
Meanwhile, cement is one of the materials with the largest application amount and the widest application range in the field of civil engineering, and the production of the cement consumes a large amount of natural resources and energy and discharges a large amount of dust and CO2And the like, which causes great damage to the natural environment. The active development of novel green inorganic cementing materials and the reduction of the cement consumption have important reality and long-term significance for the construction of conservation-minded society. At present, the utilization rate of the coal gasification furnace slag is low, the coal gasification furnace slag is processed and then applied to the preparation of a novel green inorganic cementing material, the environmental problem caused by stacking the coal gasification furnace slag can be solved, a new material support can be provided for the development of building material industry, and the sustainable development requirement is met.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a coal gasification furnace slag cementing material excited by coal chemical industry concentrated salt wastewater in an auxiliary mode and a preparation method thereof, provides a new method for comprehensive utilization of industrial solid waste such as coal gasification furnace slag, and solves the problems of land occupation and environmental pollution caused by coal gasification furnace slag stacking.
In order to achieve the purpose, the invention provides the following technical scheme:
one of the technical schemes of the invention is as follows: a coal gasification furnace slag gelled material assisted by strong salt wastewater in coal chemical industry comprises the following raw materials: the coal chemical industry concentrated salt wastewater treatment method comprises a solid raw material, an alkali activator and mixing water, wherein the solid raw material is coal gasification furnace slag and cement, the mixing water comprises water and coal chemical industry concentrated salt wastewater in a weight ratio of (0-3) to 1, and the salt content of the coal chemical industry concentrated salt wastewater is 20-25 wt%.
Further, in the solid raw material, the mass fraction of the coal gasification furnace slag is 10-90%.
Further, the weight ratio of the alkali-activator to the solid raw material is (0.05-0.15) to 1.
Further, the weight ratio of the mixing water to the solid raw material is (0.30-0.45) to 1.
Further, the alkali activator is sodium hydroxide.
Further, the fineness of the coal gasification furnace slag is 350-420 m2/kg。
Further, the cement is P.O42.5 cement.
The second technical scheme of the invention is as follows: a preparation method of the cementing material comprises the following steps: and mixing the coal gasification furnace slag, the alkali activator, the cement and the mixing water to obtain the cementing material.
Compared with the prior art, the invention has the following beneficial effects:
(1) the alkali-activated cementing material prepared by using the coal chemical industry concentrated salt wastewater and the coal gasification furnace slag in a synergistic manner has the characteristics of high compressive strength, especially high early strength, and wide application range.
(2) The invention has the advantages of easily obtained raw materials, low price and the like, and the water-quenched coal gasification furnace slag discharged from a factory can be used after being levigated.
(3) The invention has the advantages of simple preparation process, rapidness and convenience, and low requirements on equipment and operators.
(4) The invention takes the coal gasification furnace slag as the main raw material, solves the problems of land occupation and environmental pollution caused by coal gasification furnace slag discharge, and has positive environmental benefit.
(5) The cementing material belongs to one of green inorganic cementing materials, and the popularization and application of the material can effectively reduce the usage amount of the cement-based inorganic cementing material, further reduce the consumption of resources and energy sources in cement production, and are beneficial to environmental protection.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Further, for numerical ranges in this disclosure, it is understood that each intervening value, to the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" in the present invention are in parts by weight unless otherwise specified.
In the following examples, the concentrated salt wastewater in the coal chemical industry is generated in Ningdong coal chemical industry of Ningcoalg group and is rich in sodium chloride and sodium sulfate; the coal gasification furnace slag powder comprises the following main components in percentage by mass: SiO 22 (48.75％)，Al2O3(20.05％)，CaO(10.69％)，Fe2O3(9.67%) and the coal gasification furnace slag powder is prepared by grinding coal gasification furnace slag.
The description will not be repeated below.
Examples
The preparation method of the coal gasification furnace slag gelled material assisted and excited by the concentrated salt wastewater in the coal chemical industry comprises the following steps:
mixing the coal gasification furnace slag powder, cement, flaky sodium hydroxide and mixing water to obtain the cementing material, wherein the dosage of each raw material adopted in the embodiments 1-5 is shown in table 1:
TABLE 1
Figure BDA0003084846980000031
Figure BDA0003084846980000041
Comparative example
Comparative examples 1 to 4 differ from example 1 in the type and amount of raw materials, and the types and amounts of raw materials used in comparative examples 1 to 4 are shown in table 2:
TABLE 2
Figure BDA0003084846980000042
Comparative example 5
The difference from example 1 is that sodium hydroxide is replaced by calcium hydroxide.
Effect verification
The compressive strength of the cementing materials obtained in examples 1 to 5 and comparative examples 1 to 5 was measured, and the results are shown in table 3:
TABLE 3
Figure BDA0003084846980000043
Figure BDA0003084846980000051
As can be seen from the data in Table 3, the cementing material prepared by the invention has higher compressive strength, especially has fast development of early strength, can meet the requirement of general engineering projects on the compressive strength of inorganic cementing materials, and is particularly suitable for road engineering construction application with fast progress, short construction period and high requirement on early strength.
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 able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims (8)

1. The coal gasification furnace slag gelled material assisted by strong salt wastewater in coal chemical industry is characterized by comprising the following raw materials: the coal chemical industry concentrated salt wastewater treatment method comprises a solid raw material, an alkali activator and mixing water, wherein the solid raw material is coal gasification furnace slag and cement, the mixing water comprises water and coal chemical industry concentrated salt wastewater in a weight ratio of (0-3) to 1, and the salt content of the coal chemical industry concentrated salt wastewater is 20-25 wt%.
2. The cementing material according to claim 1, wherein the solid raw material comprises coal gasification furnace slag in a mass fraction of 10-90%.
3. The cementing material of claim 1, wherein the weight ratio of the alkali-activator to the solid raw material is (0.05-0.15) to 1.
4. The cementing material of claim 1, wherein the weight ratio of the mixing water to the solid raw material is (0.30-0.45) to 1.
5. Cement according to claim 1, characterised in that the alkali activator is sodium hydroxide.
6. The cementing material of claim 1, wherein the fineness of the coal gasification furnace slag is 350-420 m2/kg。
7. Cement according to claim 1, characterized in that the cement is p.o42.5 cement.
8. A method for preparing the cementing material of any one of claims 1 to 7, which is characterized by comprising the following steps: and mixing the coal gasification furnace slag, the alkali activator, the cement and the mixing water to obtain the cementing material.
CN202110577213.0A 2021-05-26 2021-05-26 Coal gasification furnace slag cementing material assisted by strong salt wastewater in coal chemical industry and preparation method thereof Pending CN113336496A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114477907A (en) * 2022-02-18 2022-05-13 涉县清漳水泥制造有限公司 Premixed pump concrete prepared from coal-made oil residues and preparation method thereof
CN115784686A (en) * 2022-11-25 2023-03-14 西安西热水务环保有限公司 Preparation method of high-toughness water permeable brick
CN115849940A (en) * 2022-09-09 2023-03-28 西安建筑科技大学 Aerated concrete and preparation method thereof

Citations (2)

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Publication number Priority date Publication date Assignee Title
EP0272748A1 (en) * 1986-12-22 1988-06-29 Shell Internationale Researchmaatschappij B.V. Flyslag treatment
CN107698180A (en) * 2016-08-08 2018-02-16 盐城工学院 The alkali-activated carbonatite binder materials prepared using nickel slag

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272748A1 (en) * 1986-12-22 1988-06-29 Shell Internationale Researchmaatschappij B.V. Flyslag treatment
CN107698180A (en) * 2016-08-08 2018-02-16 盐城工学院 The alkali-activated carbonatite binder materials prepared using nickel slag

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUIMEIZHU等: "Combined effect of coal chemical wastewater and PC on preparing of coal-to-liquids residue-based alkali activated materials", 《JOURNAL OF HAZARDOUS MATERIALS》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114477907A (en) * 2022-02-18 2022-05-13 涉县清漳水泥制造有限公司 Premixed pump concrete prepared from coal-made oil residues and preparation method thereof
CN115849940A (en) * 2022-09-09 2023-03-28 西安建筑科技大学 Aerated concrete and preparation method thereof
CN115849940B (en) * 2022-09-09 2024-03-15 西安建筑科技大学 Aerated concrete and preparation method thereof
CN115784686A (en) * 2022-11-25 2023-03-14 西安西热水务环保有限公司 Preparation method of high-toughness water permeable brick

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Application publication date: 20210903