CN105130492A - Nickel slag aerated concrete and preparation method thereof - Google Patents
Nickel slag aerated concrete and preparation method thereof Download PDFInfo
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- CN105130492A CN105130492A CN201510506837.8A CN201510506837A CN105130492A CN 105130492 A CN105130492 A CN 105130492A CN 201510506837 A CN201510506837 A CN 201510506837A CN 105130492 A CN105130492 A CN 105130492A
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- nickel slag
- aerated concrete
- micro mist
- nickel
- slag aerated
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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
Abstract
The invention belongs to the field of building material, and more specifically relates to a nickel slag aerated concrete and a preparation method thereof. The nickel slag aerated concrete comprises following main ingredients: a siliceous material, a calcareous material, a foaming agent, an additive, a conditioning agent, and water; the siliceous material comprises nickel slag micro powder, machine-made sand, and a waste material micro powder; the calcareous material comprises cement and quick lime; the foaming agent is aluminum paste; the conditioning agent is dihydrate gypsum; and the additive comprises triethanolamine, oleic acid, and water. The nickel slag aerated concrete is high in strength, excellent in thermal insulation performance, and low in water absorption; a large amount of ferronickel alloy slag can be recycled; industrial solid waste resource utilization is realized; resources are saved; the ecological environment is protected; added economic value is high; and the preparation method accords with the development direction of novel building wall materials at present.
Description
Technical field
The present invention relates to building material field, be specifically related to a kind of nickel slag aerated concrete and preparation technology thereof.
Background technology
Rhometal mineral hot furnace slag is a kind of industrial residue discharged in metal smelting nickel process, and slag amount accounts for 80% ~ 90% of raw material.Along with the demand of China's Rhometal and industrial scale increase day by day, the bulk deposition of nickel slag also becomes the important problem that enterprise development faces.Nickel slag is slightly acidic slag, with FeO, MgO, Al
2o
3, SiO
2for main component, essential mineral is pyroxene, iron forsterite, copper ferronickel sulfide mutually, and ore deposit phase and the more amorphous substances such as a small amount of tricalcium silicate, Dicalcium Phosphate (Feed Grade), possess certain gelation activity.Due to reasons such as high-temperature hot history, cooling performance, chemical constitutions, this kind of Fe alloy slag grindability is poor, and early activity is low, causes comprehensive utilization ratio far below ordinary slag.Owing to can not get rational utilization for a long time, the domestic nickel slag stored up reaches several ten million tons at present, and this not only occupies a large amount of soil, causes serious harm to periphery ecotope, returns enterprise and even society brings huge economical load.
Rhometal mineral hot furnace slag is mainly used in the world in coastland marine reclamation land, if located at inland area, it utilizes level lower, and many places are in throwing aside the state of storing up.China's nickel slag utilizes and mostly is cement mixture, concrete admixture, pavement material, backfilling material, filling in mine material and building block etc., on a small quantity or acid soil improving agent fertile for the preparation of agriculture.At present, the utilization of existing research to using ferro-nickel alloy dregs concentrates on building material field.Ten thousand towards equalization by carrying out mechanical activation to Rhometal mineral hot furnace slag, obtained supplementary cementitious material replaces part of cement, achieve the comprehensive utilization to Rhometal mineral hot furnace slag, but its volume is no more than 10%; Ten thousand snowy peaks, Wang Yingbin etc. are composite modified by research nickel ground-slag mill, activity excitation and polynary mineral, the complex cement that utilized nickel-chromium-iron alloy slag to prepare; Meng Li etc., by research nickel ground-slag mill and heat treatment mode, have prepared the Rhometal mineral hot furnace slag supplementary cementitious material of different activities.Result shows, when being 10% through 800 DEG C of nickel ground-slag volumes returning stove chilling, can improve folding strength and the ultimate compression strength of cement mortar; Old equal utilization part mineral hot furnace ground-slag replacing river sand preparation dry-mixed mortar, research shows, when the volume of mineral hot furnace slag sand replacing river sand is 60%, prepared mineral hot furnace slag dry-mixed mortar intensity is the highest, but there is the problems such as plaster workability is poor, easy bleeding, need a certain amount of water-holding agent of admixture; Dan Changfeng etc. utilize nickel slag to replace part fine aggregate in concrete, have studied the impact of its volume on concrete performance.Result shows, nickel slag partly can replace sand, and when substitute proportion is less than 50%, concrete performance is better.In summary, although more to the Land use systems of nickel slag at present, all there is the problems such as added value of product is low, waste residue utilization amount is little, activity excitation is not enough, thus fail to obtain large-scale promotion and application.
Gas concrete, as a kind of energy saving multifunction materials for wall, has insulation, light weight, sound insulation, the feature such as energy-conservation.Gas concrete raw material wide accommodation, except traditional cement-lime-sand aerated bricks, industrial solid castoff has been adopted to replace part silico-calcium raw material in recent years, as cement-slag-sand, cement-lime-fly ash aerated piece etc., and achieving good economy, environmental and social benefits, development prospect is very wide.The present invention is by carrying out mechanochemical modification to the hot slag of josephinite, gas concrete is prepared for replacing part siliceous raw material, thus expanded the utilization ways of nickel slag, improve added value of product, simultaneously to the serious actuality of cumulated MSW alleviating China's nickel slag, improve using ferro-nickel alloy dregs recycling level significant.
Summary of the invention
The invention provides a kind of nickel slag aerated concrete and preparation technology thereof, object be solve using ferro-nickel alloy dregs store up occupation of land, environmental pollution and high-efficiency resource recycling problem.Nickel slag aerated concrete of the present invention has that intensity is high, good heat insulating; the advantage that water-intake rate is low; can dissolve in a large number and store up huge using ferro-nickel alloy dregs; belong to industrial solid castoff high-efficiency resource recycling; can not only economize on resources; preserve the ecological environment, and can higher economic value added be produced, meet the developing direction of current novel energy-saving construction material.
For reaching above-mentioned technical purpose, the invention provides a kind of nickel slag aerated concrete, comprising: siccative, admixture, foaming agent and water, described siccative comprises siliceous material, calcareous material and conditioning agent, and wherein, described siliceous material comprises nickel slag micro mist.
Concrete, described siliceous material comprises nickel slag micro mist, Machine-made Sand and waste material micro mist, wherein:
Preferably, in described nickel slag micro mist: SiO
2content is 49 ~ 50wt%, specific surface area >400m
2/ kg, 3 ~ 32 μm of granule contents reach more than 80%;
Preferred, described nickel slag micro mist is the high-activity micro powder through roll squeezer-ball mill general character integrated grinding process processing preparation, has good granule-morphology.The optional grinding process disclosed in patent CN201410289143.9 of roll squeezer-integrated grinding process of ball mill general character;
Preferably, the SiO of described Machine-made Sand
2content is not less than 85wt%, specific surface area >400m after ball mill is levigate
2/ kg;
Preferably, described waste material micro mist is the quiet cutting material stopping cutting rear generation of gas concrete, specific surface area >350m after grinding
2/ kg.
Concrete, described calcareous material comprises cement and unslaked lime, wherein:
Preferably, described cement is 42.5 grades of ordinary Portland cements, specific surface area >350m
2/ kg;
Preferably, unslaked lime is that middling speed clears up lime, effective CaO >85wt%, 200 mesh screen residue <10%, digestion time 10 ~ 15min, digestion temperature 70 ~ 90 DEG C.
Concrete, described foaming agent is aluminium powder cream.
Described aluminium powder cream can derive from prior art, and such as buy and obtain, it meets the requirement of standard GB/T/T2084 " aluminium powder of getting angry " and JC/T407 " Aluminum Powder Applied in Lightweight Concrete cream ".
Concrete, described conditioning agent is dihydrate gypsum.
Preferably, described gypsum is industrial natural dihydrate gypsum, 200 mesh screen residue <8%.
Concrete, described admixture comprises oleic acid, trolamine and water.
Preferably, in described admixture, the volume ratio of oleic acid, trolamine, aqueous solvent is 1:4 ~ 6:37 ~ 41, preferred, is 1:5:39.Trolamine, oleic acid obtain by commercially available analytical pure chemical reagent.
In described raw material, the proportioning of each components based on weight percentage is: nickel slag micro mist 30 ~ 50wt%, Machine-made Sand 19 ~ 27wt%, waste material micro mist 4 ~ 8wt%, cement 10 ~ 20wt%, unslaked lime 15 ~ 20wt%, dihydrate gypsum 0 ~ 2wt%, the weight percent of aluminium powder cream and described siccative is 0.07 ~ 0.1%, and the mass ratio of described water and described siccative is 0.38 ~ 0.56:1, and the volume percent of described admixture and described water is 0.8 ~ 1.0%.
Nickel slag aerated concrete provided by the present invention, its over dry apparent density is 600kg/m
3~ 700kg/m
3.
The ingredient requirement of described unslaked lime, the equal conformance with standard GB11968-2006 of aluminium powder cream " autoclave aerated concrete building block ".Unslaked lime, aluminium powder cream, aerating concrete waste material provide by Hubei aero-crete factory.
Present invention also offers a kind of preparation technology of nickel slag aerated concrete, comprise the steps:
1) according to the proportioning raw materials of nickel slag aerated concrete, cement, nickel slag micro mist, Machine-made Sand, unslaked lime, dihydrate gypsum, mixed being incorporated in mortar mixer of waste material micro mist are stirred, obtains dry powder blend material;
2) on the basis of siccative, add hot water and admixture successively, rapid stirring 2 ~ 3min, obtain uniform slurry.Wherein hot water temperature is at 55 ~ 65 DEG C;
3) on slurry basis, add the aqueous solution of quantitative aluminium powder cream preparation, rapid stirring 20 ~ 40s, then pours into rapidly in mould;
4) mould be poured is put into 45 ~ 55 DEG C of maintaining boxes and carries out maintenance, through quiet stop cutting after, send into pressure and steam steam press maintenance in still.Be wherein 5.5 ~ 6.5h between the quiet stopping time, making condition is temperature 175 ~ 185 DEG C, pressure 0.8 ~ 1.1MPa, curing time 8 ~ 10h;
5), after steam press maintenance terminates, air dry oven building block being put into 90 ~ 100 DEG C carries out drying, time of drying 15 ~ 25h.
The invention has the advantages that provided nickel slag aerated concrete can be dissolved ferronickel metallurgical slag in a large number, belong to industrial solid castoff high-efficiency resource recycling, can reduce that the exploitation of traditional silicon material is utilized simultaneously, save resource and cost.The advantages such as it is high that gas concrete provided by the present invention also has intensity, good heat insulating, the advantage that water-intake rate is low, can be widely used in building enclosure interstitital texture.This not only alleviates the problem of ferronickel metallurgical slag land occupation and contaminate environment, and further promotes the development of novel energy-saving construction material, brings huge economic benefit to enterprise simultaneously.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with concrete case study on implementation, but the specific embodiment of the present invention is not limited to following embodiment.The manufacturing technology scheme of the nickel slag aerated concrete block that those skilled in the art obtain under not having creative work prerequisite, all belongs to protection scope of the present invention.
Embodiment 1
A kind of nickel slag aerated concrete of the present invention, design over dry apparent density is 600kg/m
3;
Each component by weight design proportioning is: cement 20wt%, nickel slag micro mist 30wt%, unslaked lime 15wt%, Machine-made Sand 27wt%, gypsum 2wt%, waste material micro mist 6wt%;
After each component mixing, stir in mortar mixer, add 65 DEG C of hot water that ratio of water to material is 0.57 successively, admixture 1.0%, rapid stirring 2min; Continue the aqueous solution adding the configuration of 0.10wt% aluminium powder cream, rapid stirring 20s, pours into rapidly in three gang mould tools;
Mould is put into 50 DEG C of maintaining boxes are quiet stops maintenance 6h, after cutting, send into pressure and steam steam press maintenance in still, making condition is 175 DEG C, 0.8MPa maintenance 10h; After steam press maintenance terminates, air dry oven building block being put into 95 DEG C carries out drying, time of drying 20h;
Obtaining the average over dry apparent density of each building block after dry is 621.2kg/m
3, mean compressive strength is 3.59MPa.
Embodiment 2
A kind of nickel slag aerated concrete of the present invention, design over dry apparent density is 600kg/m
3;
Each component by weight design proportioning is: cement 10wt%, nickel slag micro mist 50wt%, unslaked lime 15wt%, Machine-made Sand 19wt%, gypsum 1wt%, waste material micro mist 5wt%;
After each component mixing, stir in mortar mixer, add 65 DEG C of hot water that ratio of water to material is 0.57 successively, admixture 1.0%, rapid stirring 2min; Continue the aqueous solution adding the configuration of 0.10wt% aluminium powder cream, rapid stirring 20s, pours into rapidly in three gang mould tools;
Mould is put into 50 DEG C of maintaining boxes are quiet stops maintenance 6h, after cutting, send into pressure and steam steam press maintenance in still, making condition is 185 DEG C, 1.1MPa maintenance 8h; After steam press maintenance terminates, air dry oven building block being put into 95 DEG C carries out drying, time of drying 20h;
Obtaining the average over dry apparent density of each building block after dry is 615.4kg/m
3, mean compressive strength is 3.75MPa.
Embodiment 3
A kind of nickel slag aerated concrete of the present invention, design over dry apparent density is 600kg/m
3;
Each component by weight design proportioning is: cement 10wt%, nickel slag micro mist 45wt%, unslaked lime 20wt%, Machine-made Sand 19wt%, gypsum 2wt%, waste material micro mist 4wt%;
After each component mixing, stir in mortar mixer, add 65 DEG C of hot water that ratio of water to material is 0.57 successively, admixture 1.0%, rapid stirring 2min; Continue the aqueous solution adding the configuration of 0.10wt% aluminium powder cream, rapid stirring 20s, pours into rapidly in three gang mould tools;
Mould is put into 50 DEG C of maintaining boxes are quiet stops maintenance 6h, after cutting, send into pressure and steam steam press maintenance in still, making condition is 185 DEG C, 1.1MPa maintenance 8h; After steam press maintenance terminates, air dry oven building block being put into 95 DEG C carries out drying, time of drying 20h;
Obtaining the average over dry apparent density of each building block after dry is 611.1kg/m
3, mean compressive strength is 3.53MPa.
Embodiment 4
A kind of nickel slag aerated concrete of the present invention, design over dry apparent density is 700kg/m
3;
Each component by weight design proportioning is: cement 20wt%, nickel slag micro mist 30wt%, unslaked lime 15wt%, Machine-made Sand 27wt%, gypsum 1wt%, waste material micro mist 7wt%;
After each component mixing, stir in mortar mixer, add 65 DEG C of hot water that ratio of water to material is 0.46 successively, admixture 1.0%, rapid stirring 2min; Continue the aqueous solution adding the configuration of 0.08wt% aluminium powder cream, rapid stirring 20s, pours into rapidly in three gang mould tools;
Mould is put into 50 DEG C of maintaining boxes are quiet stops maintenance 6h, after cutting, send into pressure and steam steam press maintenance in still, making condition is 185 DEG C, 1.1MPa maintenance 8h; After steam press maintenance terminates, air dry oven building block being put into 95 DEG C carries out drying, time of drying 20h;
Obtaining the average over dry apparent density of each building block after dry is 726.4kg/m
3, mean compressive strength is 5.41MPa.
Embodiment 5
A kind of nickel slag aerated concrete of the present invention, design over dry apparent density is 700kg/m
3;
Each component by weight design proportioning is: cement 10wt%, nickel slag micro mist 50wt%, unslaked lime 15wt%, Machine-made Sand 19wt%, gypsum 1wt%, waste material micro mist 5wt%;
After each component mixing, stir in mortar mixer, add 65 DEG C of hot water that ratio of water to material is 0.46 successively, admixture 1.0%, rapid stirring 2min; Continue the aqueous solution adding the configuration of 0.08wt% aluminium powder cream, rapid stirring 20s, pours into rapidly in three gang mould tools;
Mould is put into 50 DEG C of maintaining boxes are quiet stops maintenance 6h, after cutting, send into pressure and steam steam press maintenance in still, making condition is 185 DEG C, 1.1MPa maintenance 8h; After steam press maintenance terminates, air dry oven building block being put into 95 DEG C carries out drying, time of drying 20h;
Obtaining the average over dry apparent density of each building block after dry is 729.4kg/m
3, mean compressive strength is 4.93MPa.
Embodiment 6
A kind of nickel slag aerated concrete of the present invention, design over dry apparent density is 700kg/m
3;
Each component by weight design proportioning is: cement 10wt%, nickel slag micro mist 45wt%, unslaked lime 20wt%, Machine-made Sand 19wt%, gypsum 2wt%, waste material micro mist 4wt%;
After each component mixing, stir in mortar mixer, add 65 DEG C of hot water that ratio of water to material is 0.46 successively, admixture 0.8%, rapid stirring 2min; Continue the aqueous solution adding the configuration of 0.08wt% aluminium powder cream, rapid stirring 20s, pours into rapidly in three gang mould tools;
Mould is put into 50 DEG C of maintaining boxes are quiet stops maintenance 6h, after cutting, send into pressure and steam steam press maintenance in still, making condition is 185 DEG C, 1.1MPa maintenance 8h; After steam press maintenance terminates, air dry oven building block being put into 95 DEG C carries out drying, time of drying 20h;
Obtaining the average over dry apparent density of each building block after dry is 718.7kg/m
3, mean compressive strength is 5.20MPa.
The each performance index of nickel slag aerated concrete prepared by the present invention all meet the requirement of standard GB/T 11968-2006 " autoclave aerated concrete building block ".
The foregoing is only better embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a nickel slag aerated concrete, is characterized in that, comprising: siccative, admixture, foaming agent and water, and described siccative comprises siliceous material, calcareous material and conditioning agent, and wherein, described siliceous material comprises nickel slag micro mist.
2. nickel slag aerated concrete according to claim 1, is characterized in that: described siliceous material comprises nickel slag micro mist, Machine-made Sand and waste material micro mist; Described calcareous material comprises cement and unslaked lime; Described conditioning agent is dihydrate gypsum; Described foaming agent is aluminium powder cream; Described admixture comprises oleic acid, trolamine and aqueous solvent; In described siccative, the proportioning of each components based on weight percentage is: nickel slag micro mist 30 ~ 50wt%, Machine-made Sand 19 ~ 27wt%, waste material micro mist 4 ~ 8wt%, cement 10 ~ 20wt%, unslaked lime 15 ~ 20wt%, dihydrate gypsum 0 ~ 2wt%, the weight percent of aluminium powder cream and described siccative is 0.07 ~ 0.1%, and the mass ratio of described water and described siccative is 0.38 ~ 0.56:1, and the volume percent of described admixture and described water is 0.8 ~ 1.0%.
3. nickel slag aerated concrete according to claim 2, is characterized in that, in described nickel slag micro mist: SiO
2content is 49 ~ 50wt%, specific surface area >400m
2/ kg, 3 ~ 32 μm of granule contents reach more than 80%.
4. the nickel slag aerated concrete according to claim 1 or 2 or 3, is characterized in that: the SiO of described Machine-made Sand
2content is not less than 85wt%, specific surface area >400m after ball mill is levigate
2/ kg.
5. the nickel slag aerated concrete according to claim 1 or 2 or 3, is characterized in that, described unslaked lime is that middling speed clears up lime, effective CaO >85wt%, 200 mesh screen residue <10%, digestion time 10 ~ 15min, digestion temperature 70 ~ 90 DEG C.
6. the nickel slag aerated concrete according to claim 1 or 2 or 3, is characterized in that, described waste material micro mist is the quiet cutting material stopping cutting rear generation of gas concrete, specific surface area >350m after grinding
2/ kg.
7. the nickel slag aerated concrete according to claim 1 or 2 or 3, is characterized in that, described gypsum is industrial natural dihydrate gypsum, 200 mesh screen residue <8%.
8. the nickel slag aerated concrete according to claim 1 or 2 or 3, is characterized in that, in described admixture, the volume ratio of oleic acid, trolamine, aqueous solvent is 1:4 ~ 6:37 ~ 41.
9. a preparation technology for nickel slag aerated concrete, is characterized in that, comprises the steps:
1) cement, nickel slag micro mist, Machine-made Sand, unslaked lime, dihydrate gypsum, mixed being incorporated in mortar mixer of waste material micro mist are stirred, obtain dry powder blend material;
2) to step 1) the dry powder blend material that obtains adds hot water and admixture, rapid stirring 2 ~ 3min successively, obtains uniform slurry;
3) to step 2) slurry that obtains adds the aqueous solution of aluminium powder cream preparation, and rapid stirring 20 ~ 40s, then pours into rapidly in mould;
4) mould be poured is put into curing room and carries out maintenance, through quiet stop cutting after, send into pressure and steam steam press maintenance in still;
5), after steam press maintenance terminates, building block is put into air dry oven and carry out drying, obtain nickel slag aerated concrete.
10. the preparation technology of nickel slag aerated concrete according to claim 9, is characterized in that: step 2) in hot water temperature be 55 ~ 65 DEG C; Step 4) in, the curing temperature in curing room is 45 ~ 55 DEG C, is 5.5 ~ 6.5h between the quiet stopping time, and making condition is temperature 175 ~ 185 DEG C, pressure 0.8 ~ 1.1MPa, curing time 8 ~ 10h; Step 5) in, drying temperature is 90 ~ 100 DEG C, and time of drying is 15 ~ 25h.
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|---|---|---|---|
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| CN105622164A (en) * | 2015-12-29 | 2016-06-01 | 福建建工建材科技开发有限公司 | Hollow micropore inorganic heat insulation mortar |
| CN107721345A (en) * | 2017-11-03 | 2018-02-23 | 盐城力通建材有限公司 | A kind of air entrained concrete |
| CN109574701A (en) * | 2018-12-07 | 2019-04-05 | 江苏博拓新型建筑材料有限公司 | One kind exempting from pressure and steams nickel slag porous brick and preparation method thereof |
| CN112723843A (en) * | 2020-12-26 | 2021-04-30 | 湖北工业大学 | Preparation method of weak-base-excited nickel slag high-strength concrete |
| CN116023094A (en) * | 2022-12-27 | 2023-04-28 | 深圳市正强混凝土有限公司 | High-performance concrete and preparation method thereof |
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| CN104671825A (en) * | 2015-02-16 | 2015-06-03 | 盐城工学院 | Nickel slag autoclaved aerated concrete block and preparation method thereof |
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| CN103627835A (en) * | 2013-11-12 | 2014-03-12 | 金川集团股份有限公司 | Method for treating nickel smelting furnace slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105622164A (en) * | 2015-12-29 | 2016-06-01 | 福建建工建材科技开发有限公司 | Hollow micropore inorganic heat insulation mortar |
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| CN107721345A (en) * | 2017-11-03 | 2018-02-23 | 盐城力通建材有限公司 | A kind of air entrained concrete |
| CN109574701A (en) * | 2018-12-07 | 2019-04-05 | 江苏博拓新型建筑材料有限公司 | One kind exempting from pressure and steams nickel slag porous brick and preparation method thereof |
| CN112723843A (en) * | 2020-12-26 | 2021-04-30 | 湖北工业大学 | Preparation method of weak-base-excited nickel slag high-strength concrete |
| CN112723843B (en) * | 2020-12-26 | 2022-06-21 | 湖北工业大学 | Preparation method of weak-base-excited nickel slag high-strength concrete |
| CN116023094A (en) * | 2022-12-27 | 2023-04-28 | 深圳市正强混凝土有限公司 | High-performance concrete and preparation method thereof |
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Application publication date: 20151209 |