CN104446328A - Method for producing premixed pump-delivered high-property concrete by jointly using variety of solid wastes - Google Patents
Method for producing premixed pump-delivered high-property concrete by jointly using variety of solid wastes Download PDFInfo
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Abstract
The invention relates to a method for producing premixed pump-delivered high-property concrete by jointly using a variety of solid wastes. The method is characterized in that broken bonds on the surface of a sand-gravel material produced from tailings and barren rock are re-bonded by jointly using a variety of solid wastes, and the cement-clinker free whole-waste concrete with low cost and high performance is prepared. The water-quenching blast furnace slag micropowder, the steel slag micropowder, the tailing micropowder, the desulphurization gypsum micropowder and the sand-gravel material produced from tailings and barren rock are used jointly, and then the broken bonds on the surface of the sand-gravel material produced from tailings and barren rock are re-bonded, thus the C35, C40, C45, C50, C55 and C60 premixed pump-delivered high-property concrete used for various construction projects is prepared. The premixed pump-delivered high-property concrete commonly used for various construction projects can be prepared by adopting the method, the mountain blasting stone can be replaced by the sand-gravel material produced from tailings and barren rock so that the emissions of PM2.5 (particulate matters of not more than 2.5mu m in diameter) can be reduced, and the purpose of greatly reducing emissions of carbon dioxide by reducing the cement clinker in the concrete can be achieved.
Description
Technical field
The invention belongs to building material field, relate to a kind of many solid wastes and work in coordination with the method utilizing and produce premixed and pumped high performance concrete.
Technical background
The haze problem of Beijing-tianjin-hebei Region has become great environmental problem highly visible.And particle diameter be less than 1 micron ultrafine particle thing, oxynitride and sulfide to the discharge in air, be the main component forming PM2.5.The total flow of the annual building sand building stones in Beijing-tianjin-hebei Region about 600,000,000 tons, major part is obtained by the fried stone that cuts into a mountain.The every cubic metre of sand material that to cut into a mountain acquired by fried stone about discharges the dust that 54.2 gram particle footpaths are less than 1 micron in air.Meanwhile, in explosive charge process, a large amount of nitro is transformed into oxynitride, and forms new oxynitride because High Temperature High Pressure promotes that the nitrogen in air and oxygen react.Mass ratio in TNT explosive shared by nitro is up to 60.76%.The current Beijing-tianjin-hebei Region fried stone that cuts into a mountain produces the potential PM2.5 formation that building sand building stones produce, and is about equivalent to the total release of 6,400,000 motor vehicles, accounts for 30% of Beijing-tianjin-hebei Region vehicular emission total amount.At present in the Yanshan Mountain and the Wild jujube in Taihang Mountain Area of Jing-jin-ji region and periphery, just heap has magnetite quartzite sections mine tailing and the barren rock of more than 20,000,000,000 tons, and has the feature of gamut discrete distribution.Completely likely progressively forbid the fried stone that cuts into a mountain, but 100% adopts magnetite quartzite sections mine tailing and barren rock to prepare building sand building stones, produces whole concrete in the district of Jing-jin-ji region.Nearest research shows, the surface properties of magnetite quartzite sections mine tailing and barren rock has significantly different character from traditional limestone stone and Machine-made Sand.Magnetite quartzite sections mine tailing and barren rock form primarily of silicate minerals, there are a large amount of silica and alumina scission of link in surface, than with calcite be the limestone stone of main mineral constituent and Machine-made Sand easier with metallurgical slag for main sial based cementitious material forms chemical bonds.But in the past to the comprehensive utilization of large Industrial Solid Waste, the research of concentrating on one thing only is more, the research that the full industrial chain of multiple solid waste works in coordination with utilization is less, add the constraint of industry barrier and traditional thought, magnetite quartzite sections mine tailing and barren rock surface have a large amount of silica and this feature of alumina scission of link are not furtherd investigate and make full use of.On the other hand, the silicon-oxy tetrahedron in blast furnace slag with potential hydraulically active is 2-3 times of cement clinker, but no matter is at present as cement mixture or as concrete admixture, or as the main component of cemented filling mining jointing compound, only has 15%-30% playing a role.China produces nearly 300,000,000 tons of blast furnace slag per year, and current this rough Land use systems is a kind of potential waste.Slag is that current iron and steel enterprise utilizes the poorest one of large solid waste, and except extracting part metals iron wherein, major part is not utilized effectively.The residual metallic iron of about 3% is also had in the steel tailings of major part steel mill after fully selecting iron, and containing calcium, magnesium, the iron divalent-metal ion higher than cement clinker.China produces nearly 100,000,000 tons of slag per year, and accumulation stores up nearly 1,000,000,000 tons, is a huge Ca, Mg and Fe resources bank.If its grinding can be become micron order fine powder, and act synergistically with blast furnace slag micro mist, tailing micro-powder and desulfurated plaster micro mist, can be made into the gelling material for high performance concrete of not cement grog.If can realize in the whole nation, the full industrial chain of sand material that blast furnace slag micro mist, slag micro powder, tailing micro-powder, desulfurated plaster micro mist and mine tailing and barren rock make is collaborative to be utilized, a large amount of cement clinkers can not only be saved, can also reduce by the fried stone that cuts into a mountain of billions of tons.Particularly in Beijing-tianjin-hebei Region, can all adopt the mine tailing of iron ore and barren rock to prepare concrete aggregate, 100% stops cutting into a mountain fried stone.
Patent of invention CN200910070563.7 " iron tailing concrete " provides a kind of iron tailing concrete, the pumping agent for concrete that the composition of this iron tailing concrete has cement, processing barren rocks and chip, adulterant, water and determines according to performance, cement 4-20%, processing barren rocks and chip 0-35%, adulterant 1-8% respectively by the composition described in weight concrete %, pumping agent for concrete is 1.5 ~ 2.5% of cement and adulterant sum weight, and all the other are water.The effect of this invention is that this new concrete adopts mine tailing stone and chip, partly or entirely replaces natural aggregate and is applied to concrete production.But this patent does not relate to, and sand material blast furnace slag micro mist, slag micro powder, tailing micro-powder, desulfurated plaster micro mist and mine tailing and barren rock made is collaborative to be utilized, the sand material surface scission of link bonding again that mine tailing and barren rock are made by the synergy making full use of above-mentioned multiple solid waste, and do not mix the technology of cement clinker.It is that main raw material is prepared gelling material and taken iron tailings as the high strength structure MATERIALS METHODS of fine aggregate preparation fine concrete with iron tailings that patent of invention CN200710177294.5 " a kind of method utilizing iron tailings to prepare high strength structure material " discloses a kind of.It is characterized in that: superfine pulverizing is carried out to iron tailings and makes its specific surface area reach 700m
2/ more than kg, add the common replacing partial cement of a certain amount of blast furnace slag powder again as gelling material, the gelling material and the coarse grain iron tailings that this kind are contained ultra-fine iron tailings powder are mixed with fine concrete by a certain percentage again, obtain by high-temperature steam curing or steam press maintenance the high strength structure material that ultimate compression strength reaches more than 100MPa.Iron tailings and the natural sand and stone resources of saving although this technology can be dissolved, but this patent does not relate to yet, and sand material blast furnace slag micro mist, slag micro powder, tailing micro-powder, desulfurated plaster micro mist and mine tailing and barren rock made is collaborative to be utilized, the sand material surface scission of link bonding again that mine tailing and barren rock are made by the synergy making full use of above-mentioned multiple solid waste, and do not mix the technology of cement clinker.
Summary of the invention
A kind of many solid wastes work in coordination with the method utilizing and produce premixed and pumped high performance concrete, the sand material surface scission of link bonding again that it is characterized in that utilizing the synergy of multiple solid waste mine tailing and barren rock to be made, and do not mix cement clinker and prepare the low-cost and high-performance concrete that 100% utilizes waste.Sand material blast furnace slag micro mist, slag micro powder, tailing micro-powder, desulfurated plaster micro mist and mine tailing and barren rock made is collaborative to be utilized, then the sand material surface scission of link bonding again by mine tailing and barren rock being made, preparing can for the premixed and pumped high performance concrete of C35, C40, C45, C50, C55 and C60 of various construction project.
The sand material that the present invention utilizes blast furnace slag micro mist, slag micro powder, tailing micro-powder, desulfurated plaster micro mist and mine tailing and barren rock to make acts synergistically, preparing can for the premixed and pumped high performance concrete of C35, C40, C45, C50, C55 and C60 of various construction project, can not only promote that Beijing-tianjin-hebei Region stops the fried stone reduction of discharging PM2.5 that cuts into a mountain comprehensively, but also reach by the cement clinker reduced in concrete the object subtracting carbonic acid gas.
Many solid wastes work in coordination with the method utilizing and produce premixed and pumped high performance concrete, and concrete steps are as follows:
(1) ready various micro mist is pressed slag micro powder 10%-50%, slag micropowder 20%-65%, tailing micro-powder 1%-30%, the ratio of desulfurated plaster micro mist 5%-15% is made into gelling material.
(2) iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method to clean flow process.
(3) sand material that gelling material step (1) prepared and step (2) process is by gelling material 17%-25%, sand 20%-30%, stone 45%-55%, and account for the polycarboxylate water-reducer of gelling material 0.2%-1.5% and account for the water of gelling material 20%-38%, namely obtain C35, C40, C45, C50, C55 and C60 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process need meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".
The working method of slag micro powder described above is that slag crushing is levigate to specific surface area 500-850m
2/ kg; Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium; In the slag micro powder finally obtained, metal Ferrum content is reduced to 0.01%-0.5%, and free calcium oxide content is reduced to 0.01%-3%.
Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of hot application method or hot vexed method or the vexed method of heat with pressure or drum process or autoclave method or air cooling method or water quenching; Described steel-making slag powder mesosilicic acid three calcium contents 5%-30%, Dicalcium Phosphate (Feed Grade) content 5%-30%, RO phase content 10%-38%, ferric oxide content 2%-8%, calcium hydroxide content 0.5%-5%, ironic hydroxide content 0.5%-5%, free calcium oxide content 0.01%-3%, calcium carbonate content 0.01%-10%, magnesiumcarbonate content is 0.01%-8%, iron carbonate content is 0.01%-3%, other 0.01%-3%; For original free calcium oxide in steel slag higher than the situation of 3%, the water of 1%-3% to be added in grinding process, with ensure levigate after the content of steel-making slag powder Free CaO lower than 3%; Other indexs meet the requirement of GB/T20491-2006.
Described slag micropowder is to specific surface area 500-800m by levigate for blast furnace slag
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and remove the iron particle based on metallic iron in real time in grinding process, to avoid damage equipment and increase grinding energy; The main chemical scope of described blast furnace slag pulverized powder is: CaO 38%-49%, SiO
226%-42%, Al
2o
36%-17%, MgO 1%-13%, MnO 0.1%-2%, FeO 0.07%-2.5%, S 0.2%-1.5%.Other indexs meet the requirement of GB/T18046-2008.
Described tailing micro-powder is to specific surface area 400-800m by iron tailings grinding
2/ kg; For the iron tailings of rich sulfide, total sulfur content is controlled below 1%; For the mine tailing of sulphur content in iron tailings more than 1%, the desulfurization of mine tailing adopts and in Tailings Slurry transfer line, arranges wet-gravity concentration machine or intensity magnetic separator carries out desulfurization, or in dry method grinding process, arranges dry method intensity magnetic separator in grinding machine and on powder conveying pipeline carry out desulfurization; The iron tailings of total sulfur content below 1% is then directly used in and wears into iron tailings micro mist; The radioactive element content of mine tailing also must meet the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001; The mine tailing exceeding standard limitation can not use; The main chemical compositions scope of described iron tailings powder is SiO
240%-95%, Al
2o
31%-40%Fe
2o
30.1%-20%, FeO 0.1%-20%, CaO 0.1%-30%, MgO 0.1%-15%, K
2o 0.01%-8%, Na
2o0.01%-10%MnO 0.01-5%MnO
20.01-5%, burns and loses 0.5%-9%, other 0.01%-1%; The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
The working method of described desulfurated plaster micro mist is: the desulfurated plaster adopting coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is at 99.8%-85%, and ovendry power is milled to specific surface area 400m
2/ kg-500m
2/ kg.
Usefulness of the present invention
The sand material that the present invention utilizes blast furnace slag micro mist, slag micro powder, tailing micro-powder, desulfurated plaster micro mist and mine tailing and barren rock to make acts synergistically, preparing can for the premixed and pumped high performance concrete of C35, C40, C45, C50, C55 and C60 of various construction project, can not only promote that Beijing-tianjin-hebei Region stops the fried stone reduction of discharging PM2.5 that cuts into a mountain comprehensively, but also reach by the cement clinker reduced in concrete the object subtracting carbonic acid gas.It is that the 2-3 characteristic sum slag doubly of cement clinker contains the calcium higher than cement clinker that the present invention makes full use of in blast furnace slag the silicon-oxy tetrahedron with potential hydraulically active, magnesium, the feature of iron divalent-metal ion, itself and tailing micro-powder and desulfurated plaster micro mist are acted synergistically, make the gelling material for high performance concrete of not cement grog, and aggregate all adopts the mine tailing of iron ore and barren rock to prepare concrete aggregate, 100% utilizes waste to prepare can for the C35 of various construction project, C40, C45, C50, the premixed and pumped high performance concrete of C55 and C60.
Embodiment
Embodiment 1
Slag crushing is levigate to specific surface area 550m 1.
2/ kg.Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium.The slag micro powder metal Ferrum content finally obtained is 0.23%, and free calcium oxide content is 2.2%.Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of overheated vexed method.The original content of free calcium oxide in steel slag of the vexed mistake of heat is 2.9%.Due to natural hygroscopic effect in grinding process, the slag micro powder free calcium oxide content finally obtained is 2.2%.Described steel-making slag powder mesosilicic acid three calcium contents 27.6%, Dicalcium Phosphate (Feed Grade) content 15.4%, RO phase content 35.8%, ferric oxide content 3.8%, calcium hydroxide content 4.9%, ironic hydroxide content 1.5%, calcium carbonate content 4.1%, magnesiumcarbonate content is 1.8%, and iron carbonate content is 0.3%, and other is 2.3% years old.Other indexs meet the requirement of GB/T20491-2006.
2. by levigate for blast furnace slag to specific surface area 680m
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and the iron particle removed in real time in grinding process based on metallic iron, to avoid damage equipment and to increase grinding energy, the main chemical of described blast furnace slag powder is: CaO38.1%, SiO
236.2%, Al
2o
313.9%, MgO 9.2%, MnO, 0.8%, FeO 0.9%, S 0.5%.Other indexs meet the requirement of GB/T18046-2008.
3. by iron tailings grinding to specific surface area 510m
2/ kg.Sulphur content 0.8% in iron tailings, the radioactive element content of mine tailing meets the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001.The main chemical compositions of described iron tailings powder is SiO
245.1%, Al
2o
38.2%Fe
2o
33.2%, FeO 7.7%, CaO, 23.2%, MgO 3.1%, K
2o 1.2, Na
2o 1.3%, MnO 2.5%MnO
20.2%, burn mistake 3.5%, other is 0.6% years old.The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
4. desulfurated plaster adopts the desulfurated plaster of coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is 98.2%, and ovendry power is milled to specific surface area 430m
2/ kg.
5. above-mentioned ready various micro mist is pressed slag micro-20%, slag micropowder 55%, tailing micro-powder 15%, the ratio of desulfurated plaster micro mist 10% is made into gelling material.
6. iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method to clean flow process.
7. the sand material that gelling material step 5 prepared and step 6 process is by gelling material 20%, sand 30%, stone 50%, and account for the polycarboxylate water-reducer of gelling material 0.35% and account for the water of gelling material 38%, namely obtain C35 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".The various performance of the concrete prepared is as shown in table 1.
The C35 no first-hand datum high performance concrete fundamental property that table 1 embodiment 1 is prepared
Embodiment 2
Slag crushing is levigate to specific surface area 580m 1.
2/ kg.Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium.The slag micro powder metal Ferrum content finally obtained is 0.28%, and free calcium oxide content is 2.5%.Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of hot application method.The original content of free calcium oxide in steel slag that hot application is crossed is 3.9%.Add the water of 1.6% in grinding process, the slag micro powder free calcium oxide content finally obtained is 2.5%.Described steel-making slag powder mesosilicic acid three calcium contents 29.6%, Dicalcium Phosphate (Feed Grade) content 14.4%, RO phase content 34.8%, ferric oxide content 3.6%, calcium hydroxide content 4.8%, ironic hydroxide content 1.5%, calcium carbonate content 4.4%, magnesiumcarbonate content is 1.7%, and iron carbonate content is 0.2%, and other is 2.4% years old.Other indexs meet the requirement of GB/T20491-2006.
2. by levigate for blast furnace slag to specific surface area 640m
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and the iron particle removed in real time in grinding process based on metallic iron, to avoid damage equipment and to increase grinding energy, the main chemical of described blast furnace slag powder is: CaO37.9%, SiO
236.6%, Al
2o
314.1%, MgO 8.9%, MnO, 0.9%, FeO 0.9%, S 0.7%.Other indexs meet the requirement of GB/T18046-2008.
3. by iron tailings grinding to specific surface area 530m
2/ kg.Sulphur content 0.6% in iron tailings, the radioactive element content of mine tailing meets the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001.The main chemical compositions of described iron tailings powder is SiO
246.2%, Al
2o
37.1%Fe
2o
32.9%, FeO 8.1%, CaO, 22.3%, MgO 3.7%, K
2o 1.3, Na
2o 1.2%, MnO 2.6%MnO
20.3%, burn mistake 3.2%, other is 0.5% years old.The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
4. desulfurated plaster adopts the desulfurated plaster of coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is 97.9%, and ovendry power is milled to specific surface area 450m
2/ kg.
5. above-mentioned ready various micro mist is pressed slag micro-23%, slag micropowder 52%, tailing micro-powder 14%, the ratio of desulfurated plaster micro mist 11% is made into gelling material.
6. iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method to clean flow process.
7. the sand material that gelling material step 5 prepared and step 6 process is by gelling material 23%, sand 28%, stone 49%, and account for the polycarboxylate water-reducer of gelling material 0.45% and account for the water of gelling material 32%, namely obtain C45 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".The various performance of the concrete prepared is as shown in table 2.
The C45 no first-hand datum high performance concrete fundamental property that table 2 embodiment 2 is prepared
Embodiment 3
Slag crushing is levigate to specific surface area 590m 1.
2/ kg.Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium.The slag micro powder metal Ferrum content finally obtained is 0.29%, and free calcium oxide content is 2.8%.Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of overheated vexed method.Described slag mesosilicic acid three calcium contents 27.1%, Dicalcium Phosphate (Feed Grade) content 15.9%, RO phase content 35.1%, ferric oxide content 4.5%, calcium hydroxide content 4.8%, ironic hydroxide content 1.6%, calcium carbonate content 4.2%, magnesiumcarbonate content is 1.9%, and iron carbonate content is 0.2%, and other is 2.4% years old.Other indexs meet the requirement of GB/T20491-2006.
2. by levigate for blast furnace slag to specific surface area 680m
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and in grinding process, implement the iron particle of removing based on metallic iron, to avoid damage equipment and to increase grinding energy, the main chemical of described blast furnace slag powder is: CaO38.8%, SiO
236.4%, Al
2o
313.7%, MgO 8.3%, MnO, 0.9%, FeO0.8%, S 0.7%.Other indexs meet the requirement of GB/T18046-2008.
3. by iron tailings grinding to specific surface area 550m
2/ kg.Sulphur content 0.9% in iron tailings, the radioactive element content of mine tailing meets the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001.The main chemical compositions of described iron tailings powder is SiO
245.2%, Al
2o
38.3%Fe
2o
33.1%, FeO 7.2%, CaO, 23.7%, MgO 3.2%, K
2o 1.1, Na
2o 1.1%, MnO 2.5%MnO
20.4%, burn mistake 3.2%, other is 0.7% years old.The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
4. desulfurated plaster adopts the desulfurated plaster of coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is 97.9%, and ovendry power is milled to specific surface area 450m
2/ kg.
5. above-mentioned ready various micro mist is pressed slag micro-27%, slag micropowder 50%, tailing micro-powder 12%, the ratio of desulfurated plaster micro mist 11% is made into gelling material.
6. iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method to clean flow process.
7. the sand material that gelling material step 5 prepared and step 6 process is by gelling material 22%, sand 29%, stone 49%, and account for the polycarboxylate water-reducer of gelling material 0.45% and account for the water of gelling material 34%, namely obtain C35 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".The various performance of the concrete prepared is as shown in table 3.
The C40 no first-hand datum high performance concrete fundamental property that table 3 embodiment 3 is prepared
Embodiment 4
Slag crushing is levigate to specific surface area 590m 1.
2/ kg.Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium.The slag micro powder metal Ferrum content finally obtained is 0.29%, and free calcium oxide content is 2.3%.Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of overheated vexed method.Described slag mesosilicic acid three calcium contents 23.6%, Dicalcium Phosphate (Feed Grade) content 18.4%, RO phase content 36.8%, ferric oxide content 2.8%, calcium hydroxide content 4.9%, ironic hydroxide content 1.7%, calcium carbonate content 4.9%, magnesiumcarbonate content is 1.7%, and iron carbonate content is 0.2%, and other is 2.4% years old.Other indexs meet the requirement of GB/T 20491-2006.
2. by levigate for blast furnace slag to specific surface area 630m
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and in grinding process, implement the iron particle of removing based on metallic iron, to avoid damage equipment and to increase grinding energy, the main chemical of described blast furnace slag powder is: CaO37.1%, SiO
237.2%, Al
2o
312.9%, MgO 8.1%, MnO, 0.7%, FeO 0.8%, S 0.6%.Other indexs meet the requirement of GB/T18046-2008.
3. by iron tailings grinding to specific surface area 580m
2/ kg.Sulphur content 0.1% in iron tailings, the radioactive element content of mine tailing meets the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001.The main chemical compositions of described iron tailings powder is SiO
285.1%, Al
2o
34.2%Fe
2o
33.0%, FeO 1.2%, CaO, 3.1%, MgO 1.1%, K
2o 0.2, Na
2o 0.5%, MnO 0.1%MnO
20.2%, burn mistake 0.4%, other is 0.5% years old.The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
4. desulfurated plaster adopts the desulfurated plaster of coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is 96.9%, and ovendry power is milled to specific surface area 480m
2/ kg.
5. above-mentioned ready various micro mist is pressed slag micro-21%, slag micropowder 57%, tailing micro-powder 11%, the ratio of desulfurated plaster micro mist 11% is made into gelling material.
6. iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method to clean flow process.
7. the sand material that gelling material step 5 prepared and step 6 process is by gelling material 22%, sand 29%, stone 49%, and account for the polycarboxylate water-reducer of gelling material 0.55% and account for the water of gelling material 33%, namely obtain C40 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".The various performance of the concrete prepared is as shown in table 4.
The C40 no first-hand datum high performance concrete fundamental property that table 4 embodiment 4 is prepared
Embodiment 5
Slag crushing is levigate to specific surface area 620m 1.
2/ kg.Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium.The slag micro powder metal Ferrum content finally obtained is 0.29%, and free calcium oxide content is 2.3%.Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of overheated vexed method.Described slag mesosilicic acid three calcium contents 23.6%, Dicalcium Phosphate (Feed Grade) content 18.4%, RO phase content 36.8%, ferric oxide content 2.8%, calcium hydroxide content 4.9%, ironic hydroxide content 1.7%, calcium carbonate content 4.9%, magnesiumcarbonate content is 1.7%, and iron carbonate content is 0.2%, and other is 2.4% years old.Other indexs meet the requirement of GB/T 20491-2006.
2. by levigate for blast furnace slag to specific surface area 680m
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and in grinding process, implement the iron particle of removing based on metallic iron, to avoid damage equipment and to increase grinding energy, the main chemical of described blast furnace slag powder is: CaO37.1%, SiO
237.2%, Al
2o
312.9%, MgO 8.1%, MnO, 0.7%, FeO 0.8%, S 0.6%.Other indexs meet the requirement of GB/T18046-2008.
3. by iron tailings grinding to specific surface area 530m
2/ kg.Sulphur content 0.1% in iron tailings, the radioactive element content of mine tailing meets the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001.The main chemical compositions of described iron tailings powder is SiO
285.1%, Al
2o
34.2%Fe
2o
33.0%, FeO 1.2%, CaO, 3.1%, MgO 1.1%, K
2o 0.2, Na
2o 0.5%, MnO 0.1%MnO
20.2%, burn mistake 0.4%, other is 0.5% years old.The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
4. desulfurated plaster adopts the desulfurated plaster of coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is 97.2%, and ovendry power is milled to specific surface area 430m
2/ kg.
5. above-mentioned ready various micro mist is pressed slag micro-40%, slag micropowder 37%, tailing micro-powder 13%, the ratio of desulfurated plaster micro mist 10% is made into gelling material.
6. iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method to clean flow process.
7. the sand material that gelling material step 5 prepared and step 6 process is by gelling material 22%, sand 29%, stone 49%, and account for the polycarboxylate water-reducer of gelling material 0.55% and account for the water of gelling material 33%, namely obtain C40 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".The various performance of the concrete prepared is as shown in table 5.
The C40 no first-hand datum high performance concrete fundamental property that table 5 embodiment 5 is prepared
Embodiment 6
Slag crushing is levigate to specific surface area 620m 1.
2/ kg.Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium.The slag micro powder metal Ferrum content finally obtained is 0.28%, and free calcium oxide content is 2.5%.Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of hot application method.The original content of free calcium oxide in steel slag that hot application is crossed is 3.9%.Add the water of 1.6% in grinding process, the slag micro powder free calcium oxide content finally obtained is 2.5%.Described steel-making slag powder mesosilicic acid three calcium contents 29.6%, Dicalcium Phosphate (Feed Grade) content 14.4%, RO phase content 34.8%, ferric oxide content 3.6%, calcium hydroxide content 4.8%, ironic hydroxide content 1.5%, calcium carbonate content 4.4%, magnesiumcarbonate content is 1.7%, and iron carbonate content is 0.2%, and other is 2.4% years old.Other indexs meet the requirement of GB/T20491-2006.
2. by levigate for blast furnace slag to specific surface area 680m
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and the iron particle removed in real time in grinding process based on metallic iron, to avoid damage equipment and to increase grinding energy, the main chemical of described blast furnace slag powder is: CaO37.9%, SiO
236.6%, Al
2o
314.1%, MgO 8.9%, MnO, 0.9%, FeO 0.9%, S 0.7%.Other indexs meet the requirement of GB/T18046-2008.
3. by iron tailings grinding to specific surface area 530m
2/ kg.Sulphur content 0.6% in iron tailings, the radioactive element content of mine tailing meets the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001.The main chemical compositions of described iron tailings powder is SiO
246.2%, Al
2o
37.1%Fe
2o
32.9%, FeO 8.1%, CaO, 22.3%, MgO 3.7%, K
2o 1.3, Na
2o 1.2%, MnO 2.6%MnO
20.3%, burn mistake 3.2%, other is 0.5% years old.The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
4. desulfurated plaster adopts the desulfurated plaster of coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is 97.9%, and ovendry power is milled to specific surface area 450m
2/ kg.
5. above-mentioned ready various micro mist is pressed slag micro-23%, slag micropowder 52%, tailing micro-powder 14%, the ratio of desulfurated plaster micro mist 11% is made into gelling material.
6. iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method to clean flow process.
7. the sand material that gelling material step 5 prepared and step 6 process is by gelling material 23%, sand 28%, stone 49%, and account for the polycarboxylate water-reducer of gelling material 0.64% and account for the water of gelling material 30%, namely obtain C50 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".The various performance of the concrete prepared is as shown in table 6.
The C50 no first-hand datum high performance concrete fundamental property that table 6 embodiment 6 is prepared
Embodiment 7
Slag crushing is levigate to specific surface area 610m 1.
2/ kg.Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium.The slag micro powder metal Ferrum content finally obtained is 0.28%, and free calcium oxide content is 1.5%.Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of hot application method.The original content of free calcium oxide in steel slag that hot application is crossed is 3.9%.Add the water of 1.6% in grinding process, the slag micro powder free calcium oxide content finally obtained is 1.5%.Described steel-making slag powder mesosilicic acid three calcium contents 31.6%, Dicalcium Phosphate (Feed Grade) content 17.4%, RO phase content 34.8%, ferric oxide content 1.6%, calcium hydroxide content 6.4%, ironic hydroxide content 0.5%, calcium carbonate content 2.8%, magnesiumcarbonate content is 1.7%, and iron carbonate content is 0.2%, and other is 1.5% years old.Other indexs meet the requirement of GB/T 20491-2006.
2. by levigate for blast furnace slag to specific surface area 680m
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and the iron particle removed in real time in grinding process based on metallic iron, to avoid damage equipment and to increase grinding energy, the main chemical of described blast furnace slag powder is: CaO37.9%, SiO
236.6%, Al
2o
314.1%, MgO 8.9%, MnO, 0.9%, FeO 0.9%, S 0.7%.Other indexs meet the requirement of GB/T18046-2008.
3. by iron tailings grinding to specific surface area 530m
2/ kg.Sulphur content 0.6% in iron tailings, the radioactive element content of mine tailing meets the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001.The main chemical compositions of described iron tailings powder is SiO
246.2%, Al
2o
37.1%Fe
2o
32.9%, FeO 8.1%, CaO, 22.3%, MgO 3.7%, K
2o 1.3, Na
2o 1.2%, MnO 2.6%MnO
20.3%, burn mistake 3.2%, other is 0.5% years old.The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
4. desulfurated plaster adopts the desulfurated plaster of coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is 98.9%, and ovendry power is milled to specific surface area 440m
2/ kg.
5. above-mentioned ready various micro mist is pressed slag micro-25%, slag micropowder 58%, tailing micro-powder 6%, the ratio of desulfurated plaster micro mist 11% is made into gelling material.
6. iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method to clean flow process.
7. the sand material that gelling material step 5 prepared and step 6 process is by gelling material 24%, sand 28%, stone 49%, and account for the polycarboxylate water-reducer of gelling material 0.73% and account for the water of gelling material 29%, namely obtain C55 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".The various performance of the concrete prepared is as shown in table 7.
The C55 no first-hand datum high performance concrete fundamental property that table 7 embodiment 7 is prepared
Embodiment 8
Slag crushing is levigate to specific surface area 690m 1.
2/ kg.Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium.The slag micro powder metal Ferrum content finally obtained is 0.28%, and free calcium oxide content is 1.5%.Described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of hot application method.The original content of free calcium oxide in steel slag that hot application is crossed is 3.9%.Add the water of 1.6% in grinding process, the slag micro powder free calcium oxide content finally obtained is 1.5%.Described steel-making slag powder mesosilicic acid three calcium contents 31.6%, Dicalcium Phosphate (Feed Grade) content 17.4%, RO phase content 34.8%, ferric oxide content 1.6%, calcium hydroxide content 6.4%, ironic hydroxide content 0.5%, calcium carbonate content 2.8%, magnesiumcarbonate content is 1.7%, and iron carbonate content is 0.2%, and other is 1.5% years old.Other indexs meet the requirement of GB/T 20491-2006.
2. by levigate for blast furnace slag to specific surface area 790m
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and the iron particle removed in real time in grinding process based on metallic iron, to avoid damage equipment and to increase grinding energy, the main chemical of described blast furnace slag powder is: CaO37.9%, SiO
236.6%, Al
2o
314.1%, MgO 8.9%, MnO, 0.9%, FeO 0.9%, S 0.7%.Other indexs meet the requirement of GB/T18046-2008.
3. by iron tailings grinding to specific surface area 530m
2/ kg.Sulphur content 0.6% in iron tailings, the radioactive element content of mine tailing meets the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001.The main chemical compositions of described iron tailings powder is SiO
246.2%, Al
2o
37.1%Fe
2o
32.9%, FeO 8.1%, CaO, 22.3%, MgO3.7%, K
2o1.3, Na
2o 1.2%, MnO 2.6%MnO
20.3%, burn mistake 3.2%, other is 0.5% years old.The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
4. desulfurated plaster adopts the desulfurated plaster of coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is 98.9%, and ovendry power is milled to specific surface area 440m
2/ kg.
5. above-mentioned ready various micro mist is pressed slag micro-27%, slag micropowder 56%, tailing micro-powder 6%, the ratio of desulfurated plaster micro mist 11% is made into gelling material.
6. iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard.The course of processing adopts Whote-wet method
Clean flow process.
7. the sand material that gelling material step 5 prepared and step 6 process is by gelling material 25%, sand 27%, stone 48%, and account for the polycarboxylate water-reducer of gelling material 0.88% and account for the water of gelling material 27%, namely obtain C60 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".The various performance of the concrete prepared is as shown in table 8.
The C60 no first-hand datum high performance concrete fundamental property that table 8 embodiment 8 is prepared
Claims (7)
1. solid waste more than a kind works in coordination with the method utilizing and produce premixed and pumped high performance concrete, it is characterized in that the sand material surface scission of link bonding again utilizing the synergy of multiple solid waste mine tailing and barren rock to be made, and do not mix cement clinker and prepare the low-cost and high-performance concrete that 100% utilizes waste, by blast furnace slag micro mist, slag micro powder, tailing micro-powder, the sand material made of desulfurated plaster micro mist and mine tailing and barren rock is collaborative to be utilized, then the sand material surface scission of link bonding again by mine tailing and barren rock are made, preparing can for the C35 of various construction project, C40, C45, C50, the premixed and pumped high performance concrete of C55 and C60.
2. a kind of many solid wastes work in coordination with the method utilizing and produce premixed and pumped high performance concrete according to claim 1, it is characterized in that concrete steps are as follows:
(1) ready various micro mist is pressed slag micro powder 10%-50%, slag micropowder 20%-65%, tailing micro-powder 1%-30%, the ratio of desulfurated plaster micro mist 5%-15% is made into gelling material;
(2) iron tailings and iron ore barren rock are processed into the sand material meeting GB/T 14684-2011 " construction sand " and GB/T14685-2011 " construction cobble, rubble " national standard; The course of processing adopts Whote-wet method to clean flow process;
(3) sand material that gelling material step (1) prepared and step (2) process is by gelling material 17%-25%, sand 20%-30%, stone 45%-55%, and account for the polycarboxylate water-reducer of gelling material 0.2%-1.5% and account for the water of gelling material 20%-38%, namely obtain C35, C40, C45, C50, C55 and C60 high-performance premixed pumping concrete after mix is even, the quality of mixing water and water reducer and concrete mixing process need meet the regulation of CECS207:2006 " high performance concrete utilisation technology code ".
3. according to claim 1 or 2, a kind of many solid wastes are worked in coordination with to utilize and are produced the method for premixed and pumped high performance concrete, it is characterized in that the working method of described slag micro powder is for levigate to specific surface area 500-850m slag crushing
2/ kg; Remove the size particles based on metallic iron in time in the mode of real-time circulation deironing in slag crushing and grinding processes, to avoid in grinding process, produce ferromegnetism and magnetic coagulation due to intergranular friction and the phase mutual friction between particle with grinding medium; In the slag micro powder finally obtained, metal Ferrum content is reduced to 0.01%-0.5%, and free calcium oxide content is reduced to 0.01%-3%.
4. a kind of many solid wastes work in coordination with the method utilizing and produce premixed and pumped high performance concrete according to claim 3, described slag is bessemer furnace slag, broken ore dressing and levigate before through the preprocessing process of hot application method or hot vexed method or the vexed method of heat with pressure or drum process or autoclave method or air cooling method or water quenching; Described steel-making slag powder mesosilicic acid three calcium contents 5%-30%, Dicalcium Phosphate (Feed Grade) content 5%-30%, RO phase content 10%-38%, ferric oxide content 2%-8%, calcium hydroxide content 0.5%-5%, ironic hydroxide content 0.5%-5%, free calcium oxide content 0.01%-3%, calcium carbonate content 0.01%-10%, magnesiumcarbonate content is 0.01%-8%, iron carbonate content is 0.01%-3%, other 0.01%-3%; For original free calcium oxide in steel slag higher than the situation of 3%, the water of 1%-3% to be added in grinding process, with ensure levigate after the content of steel-making slag powder Free CaO lower than 3%; Other indexs meet the requirement of GB/T20491-2006.
5. according to claim 1 or 2, a kind of many solid wastes work in coordination with the method utilizing and produce premixed and pumped high performance concrete, it is characterized in that described slag micropowder is to specific surface area 500-800m by levigate for blast furnace slag
2/ kg, it is front through deironing pre-treatment that blast furnace slag enters mill, removes the bulk metal iron be mixed into, and remove the iron particle based on metallic iron in real time in grinding process, to avoid damage equipment and increase grinding energy; The main chemical scope of described blast furnace slag pulverized powder is: CaO38%-49%, SiO
226%-42%, Al
2o
36%-17%, MgO1%-13%, MnO0.1%-2%, FeO0.07%-2.5%, S0.2%-1.5%.Other indexs meet the requirement of GB/T18046-2008.
6. according to claim 1 or 2, a kind of many solid wastes work in coordination with the method utilizing and produce premixed and pumped high performance concrete, it is characterized in that described tailing micro-powder is to specific surface area 400-800m by iron tailings grinding
2/ kg; For the iron tailings of rich sulfide, total sulfur content is controlled below 1%; For the mine tailing of sulphur content in iron tailings more than 1%, the desulfurization of mine tailing adopts and in Tailings Slurry transfer line, arranges wet-gravity concentration machine or intensity magnetic separator carries out desulfurization, or in dry method grinding process, arranges dry method intensity magnetic separator in grinding machine and on powder conveying pipeline carry out desulfurization; The iron tailings of total sulfur content below 1% is then directly used in and wears into iron tailings micro mist; The radioactive element content of mine tailing also must meet the regulation of radioactive material radionuclides limitation standard GB/T 6566-2001; The mine tailing exceeding standard limitation can not use; The main chemical compositions scope of described iron tailings powder is SiO
240%-95%, Al
2o
31%-40%Fe
2o
30.1%-20%, FeO0.1%-20%, CaO0.1%-30%, MgO0.1%-15%, K
2o0.01%-8%, Na
2o0.01%-10%MnO0.01-5%MnO
20.01-5%, burns and loses 0.5%-9%, other 0.01%-1%; The content of selected iron tailings poisonous and harmful element does not exceed the limitation of CNS or provincial standard or industry standard defined.
7. according to claim 1 or 2, a kind of many solid wastes work in coordination with the method utilizing and produce premixed and pumped high performance concrete, it is characterized in that the working method of described desulfurated plaster micro mist is: the desulfurated plaster adopting coal fired power plant flue gas desulfurization, its CaSO
42H
2o and CaSO
41/2H
2the content sum of O is at 99.8%-85%, and ovendry power is milled to specific surface area 400m
2/ kg-500m
2/ kg.
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