CN103130482B - Method for preparing baking-free bricks and building blocks by using sintering desulfurization byproducts - Google Patents
Method for preparing baking-free bricks and building blocks by using sintering desulfurization byproducts Download PDFInfo
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- CN103130482B CN103130482B CN201110397200.1A CN201110397200A CN103130482B CN 103130482 B CN103130482 B CN 103130482B CN 201110397200 A CN201110397200 A CN 201110397200A CN 103130482 B CN103130482 B CN 103130482B
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- 239000006227 byproduct Substances 0.000 title claims abstract description 73
- 238000005245 sintering Methods 0.000 title claims abstract description 58
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 57
- 239000011449 brick Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000023556 desulfurization Effects 0.000 title abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000203 mixture Substances 0.000 claims abstract description 37
- 239000010881 fly ash Substances 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 12
- 239000010440 gypsum Substances 0.000 claims abstract description 12
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 12
- 239000007800 oxidant agent Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 239000000047 product Substances 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims abstract description 6
- 239000002912 waste gas Substances 0.000 claims abstract description 5
- 239000012615 aggregate Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
- 230000003009 desulfurizing effect Effects 0.000 claims description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 6
- 239000003818 cinder Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 6
- 235000011152 sodium sulphate Nutrition 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- VUTBELPREDJDDH-UHFFFAOYSA-N 4-amino-5-hydroxymethyl-2-methylpyrimidine Chemical class CC1=NC=C(CO)C(N)=N1 VUTBELPREDJDDH-UHFFFAOYSA-N 0.000 claims description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 3
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- -1 setting accelerator Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 239000000701 coagulant Substances 0.000 abstract 2
- 238000007664 blowing Methods 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 10
- 239000011575 calcium Substances 0.000 description 10
- 239000003546 flue gas Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 235000010261 calcium sulphite Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 235000011148 calcium chloride Nutrition 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000011456 concrete brick Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000005070 ripening Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000003460 sulfonic acids Chemical class 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011469 building brick Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000011464 hollow brick Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 235000010269 sulphur dioxide Nutrition 0.000 description 1
- 239000004291 sulphur dioxide Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for preparing baking-free bricks and building blocks by using sintering desulfurization byproducts, which comprises the following steps of: 10-50% of steel slag: 10% -25%, blast furnace slag: 10% -35%, fly ash: 10% -35%, gypsum: 1% -8%, coagulant: 0.5-2% of water reducing agent: 0.3% -1.1%, and grinding the components respectively to form powder with more than or equal to 300 meshes for later use; mixing the sintering desulfurization by-product and the steel slag according to the proportion, adding water to prepare slurry of which the weight ratio of the sintering desulfurization by-product to the steel slag is 10-80%, fully and uniformly stirring, and adding a strong oxidant H of which the weight ratio is 0.5-3% of the total weight of the desulfurization by-product and the steel slag2O2Then blowing air or mixed gas of the air and the industrial low-temperature waste gas, and fully mixing and stirring in the process; stirring for 0.5-1 h, naturally airing the mud cake obtained by filter pressing the mixture by a filter press in the air until the water content is 10-40 wt%, so that CaSO in the desulfurization by-products3<3 percent; mixing and stirring the sintering desulfurization byproduct and the steel slag mixture with blast furnace slag, fly ash, gypsum, a coagulant, a water reducing agent, aggregate and water; the aggregate is 1-2 times of the weight of all the raw materials, and the addition amount of water is 5-18% of the total weight of the raw materials; uniformly stirring the mixture; conveying the mixture into a forming machine for extrusion forming; and obtaining a formed brick, and naturally curing for 28 days to obtain a finished product under the condition that the external temperature is more than or equal to 10 ℃.
Description
Technical field
The invention belongs to industrial solid castoff recycling field, be specifically related to a kind of sintering desulfuration by product that utilizes and prepare method that is non-burning brick, building block.
Background technology
Steel industry sulfurous gas produces primarily of agglomerates of sintered pellets flue gas, and the sulfurous gas that agglomerates of sintered pellets flue gas produces accounts for iron and steel enterprise's total emission volumn more than 70%, and indivedual enterprise reaches about 90% (not containing the sulfurous gas that coal-fired power plant for self-supply produces).Within 2011, steel industry sinter fume discharge sulfurous gas is no more than 64.5 ten thousand tons, emphasis large and medium-sized enterprise sulphur dioxide emission≤1.8kg/t steel, meet the index request that " steel industry adjustment and development planning " proposes, sintering gas flue gas sulfuric dioxide pollutes and is tentatively governed.
For thoroughly solving sinter fume pollution problem, not only to realize flue gas high-efficiency desulfurization, also will solve effective Utilizing question of by product.Adopt lime semidrying (SDA) sulfur removal technology to produce desulfurizing byproduct every year to discharge nowhere, can only transport outward and store up process, cause the wasting of resources and secondary pollution.Effective utilization of calcium base prepared from dry desulphurization byproduct is a global problem, and the byproduct compounds produced due to desulfurization is complicated, also lacks effective utilization ways at present.
The main component of sintering dry method semi-dry desulphurization by product comprises CaSO
4, CaSO
3, CaCO
3with Ca (OH)
2, owing to containing higher CaSO in sintering flue gas desulfurization by product
3, part CaCl
2and the f-CaO of trace, this is a larger difficult problem to the comprehensive utilization of sintering desulfuration by product.In fact, up to the present, the research report about sinter fume semi-dry desulphurization by product is all little both at home and abroad.
Retrieve the patent of invention that application number is 200910093645. 3, its weak point is: (1) have employed cement clinker, although can improve the consolidation strength of fragment of brick, consumption is many, and could not make full use of other Industrial Solid Waste resources to realize same function; (2) slag adopted needs can use through long ripening after overheated stewing treatment process, and f-CaO aquation digestion time is long, and slag needs to take more place, and manufacturing procedure is loaded down with trivial details; (3) fail the effective constituent made full use of in sintering desulfuration by product and can accelerate CaSO under certain strong oxidizer effect
3the effect of oxidizing reaction process, its CaSO
3oxidation time is short, causes reaction not thorough, easily causes brick body cracking in using.
In recent years, along with country forbids the increasing of the dynamics that solid clay brick uses, add domestic residue resource and the heavy demand of construction market, non-burning brick, building block has become one of important novel wall material.Non-burning brick, building block outside gathering materials, is equipped with admixture after compression moulding, forms through natural curing, and do not need sintering and steam-cured, production cost is lower than vitrified brick, has technical process simply, the features such as energy-conserving and environment-protective.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, for utilizing industrial solid castoff better, realizing recycling, providing a kind of sintering desulfuration by product that utilizes to prepare method that is non-burning brick, building block.Prepared brick or building block have good mechanical property, can do basis, bearing wall.
For achieving the above object, the sintering desulfuration by product that utilizes provided by the invention prepares method that is non-burning brick, building block.
Due to CaSO in sintering dry method semi-dry desulphurization by product main component
3, CaCO
3and Ca (OH)
2more, by CaSO
3be converted into CaSO
4, can by CaSO in desulphurize fly ash
4, CaCO
3and Ca (OH)
2the purposes of three kinds of compositions combines application.Therefore, sintering desulfuration by product can be mixed as preparation raw material that is non-burning brick, building block, thus be realized the recycling of resource.
The preparation method of above-mentioned non-burning brick, building block, its technical process is as follows:
(1) prepare burden: sintering desulfuration by product by weight percentage: 10% ~ 50%, slag: 10% ~ 25%, blast furnace slag: 10% ~ 35%, flyash: 10% ~ 35%, gypsum: 1% ~ 8%, setting accelerator: 0.5% ~ 2%, water reducer: 0.3% ~ 1.1%, and by mentioned component respectively through grinding, form >=300 object powders for subsequent use;
(2) sintering desulfuration by product and slag are mixed according to aforementioned proportion, add water and make the two to account for gross weight ratio be the slurries of 10% ~ 80%, stir, add the strong oxidizer H that weight ratio is 0.5% ~ 3% of desulfurizing byproduct and slag gross weight
2o
2, blast air or air and industrial low-temperature waste gas mixed gas afterwards, abundant mix and blend in process.Make the CaSO in desulfurizing byproduct
3with the O in air or mixed gas
2reaction generates CaSO
4, and Fe in slag
2o
3, MgO, MnO and strong oxidizer H
2o
2acting in conjunction, can be used as CaSO
3with the O in flue gas
2the catalyzer of reaction, accelerated reaction process.F-CaO in sintering desulfuration by product and slag is hydrolyzed, carries out fully reacting forming Ca (OH) with water
2, the CaCl in sintering flue gas desulfurization by product
2can be used as the chemical stabilizer of f-CaO, CaCl
2be combined with f-CaO and generate Ca (OH)
2caCl
22H
2the water solubles of O, thus the hydration rate accelerating f-CaO, improve the stability of system.Through the stir process of 0.5 ~ 1h, sintering desulfuration by product and the mud cake of slag mixture after pressure filter press filtration, naturally drying in the air to moisture content weight percent is in atmosphere 10% ~ 40%, makes the CaSO in desulfurizing byproduct
3<3%, meets the requirement of building brick and building block;
(3) during processing, by sintering desulfuration by product and slag mixture and blast furnace slag, flyash, gypsum, setting accelerator, water reducer, aggregate and water mix and blend; Aggregate is above-mentioned all raw material weights 1 ~ 2 times, and because attached water content differs, amount of water is advisable to grab real cannot not unclamping loosely with hand, and the add-on of water is 5% ~ 18% of above-mentioned materials gross weight; Compound is stirred;
(4) above-mentioned compound is delivered into forming machine extrusion molding;
(5) obtain mould brick, under DEG C condition of outside temperature >=10, after natural curing 28d, obtain finished product, be non-burning brick, building block.
The present invention is non-burning brick, building block can be solid brick, hollow brick, Brick with blind hole;
In above-mentioned non-burning brick, building block, described sintering desulfuration by product is calcium system dry method or semi-dry desulphurization by product;
Described slag is that moisture content is lower than 20% after overheated stewing process; Described blast furnace slag is that moisture content is lower than 20% after shrend process;
Described water reducer is one or more mixing of lignin sulfonate, naphthalene system, pyramine class; Setting accelerator is sodium sulfate, one or both mixing of sodium carbonate;
Described aggregate is one or more mixtures in building waste residue, stone factory's rubble, river sand, powdered coal cinder, granularity≤8mm; Strong oxidizer is H
2o
2.
The sintering desulfuration by product that utilizes disclosed by the invention prepares method that is non-burning brick or building block, this technology through repetition test, the requirement of mechanical property conformance with standard.Sintering desulfuration by product, belong to air-setting material, itself does not have self-hardening property, does not have gelling yet.After interpolation blast furnace slag and flyash isoreactivity material, add that itself belongs to hydraulic material again, under the effect of exciting agent, setting accelerator and water, carry out hydration reaction, generate ettringite (Aft) and hydrated calcium silicate (C-S-H) gelling material, both cross-lappings, one-tenth is integrated.
Non-burning brick, building block disclosed by the invention, the standard-required of indices reaches " solid concrete brick " GB/T21144-2007, MU10, namely Mean Crush is at more than 10Mpa.In the present invention, the maximum doping quantity of sintering desulfuration by product can reach 50%, and can consume slag, blast furnace slag, flyash and building waste residue, stone factory's rubble, powdered coal cinder in a large number.For utilizing iron and steel waste resource, reducing land occupation, decreasing pollution, save energy, all has profound significance.
The invention has the advantages that:
(1) the present invention exempts to add cement clinker, makes non-burning brick, building block still can realize excellent performance.
(2) when mixing after sintering desulfuration by product and steel slag grinding, add strong oxidizer H2O2, under its effect, blast air or air and industry and discharge low temperature waste gas mixed gas, in slag, Fe2O3, MgO, MnO are under strong oxidizer H2O2 effect, as the catalyzer that the O2 in CaSO3 in desulfurizing byproduct and flue gas reacts, accelerate CaSO3 and be converted into CaSO4 reaction process; And blast low-temperature industrial waste gas, same the carrying out accelerating its reaction process, overcome the brick problem of Cracking that CaSO3 brings due to oxidation in non-burning brick, building block use.
(3) slag after the stewing process of heat need not again through ripening, in sintering desulfuration by product and slag mixing process, f-CaO in sintering desulfuration by product and slag and water carry out fully reacting forming Ca (OH) 2, CaCl2 in sintering flue gas desulfurization by product can be used as the chemical stabilizer of f-CaO, CaCl2 and f-CaO combines the water solubles generating Ca (OH) 2CaCl22H2O, thus accelerate the hydration rate of f-CaO, the stability of improvement system, prevents brick volumetric expansion.
(4) based on the material characteristic of agglomerated calcium system dry method or semi-dry desulphurization by product, the main raw material prepared used as non-burning brick or building block, its incorporation in brick can reach 50%, and this is that the recycling of sintering flue gas desulfurization by product opens new approach.
(5) non-burning brick or building block with the cheap industrial residue such as sintering desulfuration by product, slag, blast furnace slag, flyash, building waste residue, stone factory's rubble, powdered coal cinder for main raw material, adopt unburned operational path, flow process is short, and cost is low, product energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is that the sintering desulfuration by product that utilizes of the present invention prepares process flow sheet that is non-burning brick, building block.
Embodiment
Below in conjunction with embodiment, the present invention is further described:
The present invention is with sintering desulfuration by product for main raw material, and technical process as shown in Figure 1.
Embodiment 1:
(1) get the raw materials ready: sintering desulfuration by product: 40%, slag: 15%, blast furnace slag: 15%, flyash II level: 25%, gypsum: 3.2%, sodium sulfate: 1%, naphthalene water reducer: 0.8%; Respectively through grinding, form 400 object powders for subsequent use; Wherein slag is that after the stewing process of heat, moisture content is 10%, and blast furnace slag is after shrend process, and moisture content is 13%;
(2) sintering desulfuration by product and slag are proportionally mixed, add water both making and account for gross weight than the slurries being 80%, stir, add strong oxidizer H
2o
2, weight ratio is 2% of desulfurizing byproduct and slag gross weight, blasts air afterwards and discharges low temperature waste gas (115 DEG C) mixed gas, abundant mix and blend in process with sintering; Through the stir process of 1h, sintering desulfuration by product and the mud cake of slag mixture after pressure filter press filtration, naturally dry in the air in atmosphere to moisture content weight percent be 23%;
(3), during processing, be above-mentioned all raw material weights 0.5 times of crushed stone, the powdered coal cinder (waiting outer level) of 1 times and water mix and blend by sintering desulfuration by product and slag mixture and blast furnace slag, flyash II level, gypsum, sodium sulfate, naphthalene water reducer, aggregate; Because attached water content differs, amount of water is advisable to grab real cannot not unclamping loosely with hand, and the add-on of water is 11% of above-mentioned materials gross weight; Compound is stirred;
(4) above-mentioned compound is delivered into forming machine extrusion molding;
(5) obtain mould brick, under extraneous medial temperature 25 DEG C of conditions, after natural curing 28d, obtain non-burning brick, building block finished product.
Embodiment 2:
(1) get the raw materials ready: sintering desulfuration by product: 30%, slag: 25%, blast furnace slag: 22%, flyash I level: 20%, gypsum: 2%, sodium carbonate: 0.5%, lignin sulfonic acid salt water reducer: 0.5%; H
2o
2account for 1.5% of sintering desulfuration by product and slag gross weight, respectively through grinding, form 300 object powders for subsequent use; Wherein slag is that after the stewing process of heat, moisture content is 15%, and blast furnace slag is after shrend process, and moisture content is 10%;
(2) sintering desulfuration by product and slag are proportionally mixed, add water both making and account for gross weight than the slurries being 60%, stir, add strong oxidizer H
2o
2, weight ratio is 1.5% of desulfurizing byproduct and slag gross weight, blasts air afterwards, abundant mix and blend in process; Through the stir process of 0.8h, sintering desulfuration by product and the mud cake of slag mixture after pressure filter press filtration, naturally dry in the air in atmosphere to moisture content weight percent be 16%;
(3) during processing, by sintering desulfuration by product and slag mixture and blast furnace slag, flyash I level, gypsum, sodium carbonate, lignin sulfonic acid salt water reducer and the building waste residue of above-mentioned all raw material weights 1 times, the river sand of 1 times and water mix and blend; Because attached water content differs, amount of water is advisable to grab real cannot not unclamping loosely with hand, and the add-on of water is 17% of above-mentioned materials gross weight; Compound is stirred;
(4) above-mentioned compound is delivered into forming machine extrusion molding;
(5) obtain mould brick, under extraneous medial temperature 25 DEG C of conditions, after natural curing 28d, obtain non-burning brick, building block finished product.
Embodiment 3:
(1) get the raw materials ready: sintering desulfuration by product: 20%, slag: 15%, blast furnace slag: 30%, flyash I level: 30%, gypsum: 4%, sodium sulfate: 0.2%, sodium carbonate: 0.3%, naphthalene water reducer: 0.2%, pyramine class water reducer: 0.3%; Respectively through grinding, form 325 object powders for subsequent use; Wherein slag is that after the stewing process of heat, moisture content is 15%, and blast furnace slag is after shrend process, and moisture content is 10%;
(2) sintering desulfuration by product and slag are proportionally mixed, add water both making and account for gross weight than the slurries being 45%, stir, add strong oxidizer H
2o
2, weight ratio is 1% of desulfurizing byproduct and slag gross weight, blasts air afterwards, abundant mix and blend in process; Through the stir process of 0.6h, sintering desulfuration by product and the mud cake of slag mixture after pressure filter press filtration, naturally dry in the air in atmosphere to moisture content weight percent be 35%;
(3) during processing, by sintering desulfuration by product and the rubble of slag mixture and blast furnace slag, flyash I level, gypsum, sodium sulfate, sodium carbonate, pyramine class water reducer and above-mentioned all raw material weights 0.5 times, the powdered coal cinder (waiting outer level) of 0.5 times and water mix and blend; Because attached water content differs, amount of water is advisable to grab real cannot not unclamping loosely with hand, and the add-on of water is 6% of above-mentioned materials gross weight; Compound is stirred;
(4) above-mentioned compound is delivered into forming machine extrusion molding;
(5) obtain mould brick, under extraneous medial temperature 25 DEG C of conditions, after natural curing 28d, obtain non-burning brick, building block finished product.
Table 1 sintering desulfuration by product volume is on impact that is non-burning brick, building block mechanical property
Through non-burning brick, the building block flat appearance of natural curing 28d, N/D and slight crack, in various material proportion situation, ultimate compression strength that is non-burning brick, building block is shown in Table 1, and result shows that obtained non-burning brick, building block can meet the requirement of strength about MU10 brick in " solid concrete brick " GB/T21144-200.
Claims (5)
1. utilize sintering desulfuration by product to prepare non-burning brick method, it is characterized in that technical process is as follows:
(1) prepare burden: sintering desulfuration by product by weight percentage: 10% ~ 50%, slag: 10% ~ 25%, blast furnace slag: 10% ~ 35%, flyash: 10% ~ 35%, gypsum: 1% ~ 8%, setting accelerator: 0.5% ~ 2%, water reducer: 0.3% ~ 1.1%, and by mentioned component respectively through grinding, form >=300 object powders for subsequent use;
(2) sintering desulfuration by product and slag are mixed according to aforementioned proportion, add water and make the two and account for gross weight than the slurries being 10% ~ 80%, stir, add the strong oxidizer H that weight ratio is 0.5% ~ 3% of desulfurizing byproduct and slag gross weight
2o
2, blast air or air and industrial low-temperature waste gas mixed gas afterwards, abundant mix and blend in process; Through the stir process of 0.5 ~ 1h, the mud cake of mixture after pressure filter press filtration, naturally drying in the air to moisture content weight percent is in atmosphere 10% ~ 40%, makes the CaSO in desulfurizing byproduct
3<3%;
(3) during processing, by sintering desulfuration by product and slag mixture and blast furnace slag, flyash, gypsum, setting accelerator, water reducer, aggregate and water mix and blend; Aggregate is 1 ~ 2 times of above-mentioned all raw material weights, and the add-on of water is 5% ~ 18% of above-mentioned materials gross weight; Compound is stirred;
(4) above-mentioned compound is delivered into forming machine extrusion molding;
(5) obtain mould brick, under DEG C condition of outside temperature >=10, after natural curing 28d, obtain finished product.
2. the sintering desulfuration by product that utilizes according to claim 1 prepares non-burning brick method, it is characterized in that described slag is for after the stewing process of heat, moisture content lower than 20% slag, blast furnace slag is after shrend process, moisture content lower than 20% blast furnace slag.
3. the sintering desulfuration by product that utilizes according to claim 1 prepares non-burning brick method, it is characterized in that described water reducer is one or more mixing of lignin sulfonate, naphthalene system, pyramine class.
4. the sintering desulfuration by product that utilizes according to claim 1 prepares non-burning brick method, it is characterized in that described setting accelerator is sodium sulfate, one or both mixing of sodium carbonate.
5. the sintering desulfuration by product that utilizes according to claim 1 prepares non-burning brick method, it is characterized in that described aggregate is one or more mixtures in building waste residue, stone factory's rubble, river sand, powdered coal cinder, granularity≤8mm.
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| 半干法烟气脱硫灰制蒸压砖;李佩欣等;《粉煤灰综合利用》;20101231(第6期);第44-46页 * |
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