CN102515825A - Chromium slag and chromium reducing furnace slag high-temperature melt foaming method and foaming device - Google Patents

Chromium slag and chromium reducing furnace slag high-temperature melt foaming method and foaming device Download PDF

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Publication number
CN102515825A
CN102515825A CN2011103986841A CN201110398684A CN102515825A CN 102515825 A CN102515825 A CN 102515825A CN 2011103986841 A CN2011103986841 A CN 2011103986841A CN 201110398684 A CN201110398684 A CN 201110398684A CN 102515825 A CN102515825 A CN 102515825A
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foaming
chromium
slag
whipping agent
temperature
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CN102515825B (en
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唐竹兴
李国昌
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Shandong University of Technology
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Shandong University of Technology
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Abstract

The invention relates to chromium slag and chromium reducing furnace slag high-temperature melt foaming method and foaming device. The foaming device is characterized by comprising a foaming device 1, spiral grooves 2, a final-end foaming region 3, a middle-end foaming region 4, an initial-end foaming region 5, a high-temperature melt inlet 6 and a foaming agent inlet 7, wherein the internal surfaces of the initial-end foaming region 5 and the middle-end foaming region 4 are respectively spherical surfaces R2 and R1, and the internal surfaces of the three foaming regions are all provided with uniformly distributed spiral grooves 2. The foaming method comprises the following steps of: respectively adding 30-40% of chromium slag as a main material, 40-10% of red mud, 10-15% of coal ash, 15-20% of coal gangue, 4.5-10% of quartz sand and 0.5-5% of coal dust, sufficiently reducing the chromium slag under 1100-1300 DEG C reducing atmosphere, melting and separating chromium, iron and furnace slag at the temperature of 1655-1695 DEG C, and foaming the separated furnace slag high-temperature melt into light-weight foamed ceramic under the action of a foaming agent. In the invention, the industrial waste material is used as a main material, not only is the production cost lowered, but also environmental pollution is reduced, the foaming method and the foaming device are economical and friendly to the environment, and the waste material can be recycled. The prepared chromium slag light-weight foamed ceramic has high strength and strong heat insulation property and decoration feature.

Description

Chromium slag chromium reduced blast furnace high-temperature fusant foaming method and foam device
Technical field
The present invention relates to a kind of chromium slag chromium reduced blast furnace high-temperature fusant foaming method and foam device, is chromium slag chromium reduced blast furnace high-temperature fusant to be issued infusion in the condition of high temperature become light floamed ceramic, belongs to architectural pottery fabricating technology field.
Background technology
Chromium slag chromium reduced blast furnace light floamed ceramic is mainly used in exterior wall and lagging material uses.Generally adopting clay brick, hollow cement block and gas concrete at present, is a kind of consumption of natural resource, building and ornament materials that manufacturing cost is high.
The industrial waste that industrial waste chromium slag produces when being the chromium metal smelting, environmental pollution is serious, does not also have effective treating method in the world.The main at present chromium slag that adopts is produced the cement use, but because product properties is relatively poor, production cost is higher, and can't large-scale promotion application.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome above-mentioned defective, utilize the industrial waste material, turn waste into wealth, the chromium slag light floamed ceramic that the production use properties is good, production cost is low, its technical scheme is:
A kind of chromium slag chromium reduced blast furnace high-temperature fusant foaming method and foam device; The structure of foam device comprises: foam device 1, spiral grooves 2, terminal fire district 3, middle-end foaming district 4, the district of end foaming just 5, high-temperature fusant inlet 6, whipping agent inlet 7; Wherein, District 5 of end foaming just and middle-end foaming district 4 internal surfaces are respectively the sphere of R2 and R1, and three foaming district internal surfaces all have equally distributed spiral grooves 2.
Described chromium slag chromium reduced blast furnace high-temperature fusant foaming method and foam device; With the chromium slag is that major ingredient adds red mud, flyash, coal gangue, silica sand, coal dust, and the shared weight percent of each component is: chromium slag 30 ~ 40%, red mud 40 ~ 10%; Flyash 10 ~ 15%; Coal gangue 15 ~ 20%, silica sand 4.5 ~ 10%, coal dust 0.5 ~ 5%.
Described chromium slag chromium reduced blast furnace high-temperature fusant foaming method and foam device; Whipping agent is that whipping agent powder, kaolin, water and water glass are with weight ratio: the suspended nitride that 0.5 ~ 30:0.5 ~ 10:98 ~ 55:1 ~ 5 uniform mixing are processed; Wherein, The whipping agent powder is to be 60 ~ 90:20 ~ 5:20 ~ 5 uniform mixing by one or both and water glass of lime carbonate, magnesiumcarbonate and cullet powder with weight ratio, and it is that 3 ~ 10 μ m process that the levigate granularity in back was burnt till in 400 ~ 700 ℃ of insulations in dry back in 1-3 hour.
Described chromium slag chromium reduced blast furnace high-temperature fusant foaming method and foam device specifically may further comprise the steps:
(1) batching: chromium slag 30 ~ 40%, red mud 40 ~ 10%, flyash 10 ~ 15%, coal gangue 15 ~ 20%, silica sand 4.5 ~ 10%, coal dust 0.5 ~ 5%, and mix and make compound;
(2) melting and reducing: with 1100 ~ 1300 ℃ of thorough mixing reduction under reducing atmosphere of above-mentioned compound; Briquetting is put in the high temperature molten bath then; Temperature is that 1655 ~ 1695 ℃ of briquettings sink to below the slag melt liquid level and fusion; Iron that the reduction back forms and chromium form melt and sink to the bottom in molten bath, and float to the top in molten bath on the slag melt, and iron, chromium melt are separated with slag melt automatically;
(3) foaming: whipping agent is pressed into through whipping agent inlet 7 and meets in the district of end foaming just 5 with the high-temperature fusant that flows into through slag high-temperature fusant inlet 6; The expansion of gasifying rapidly of water in the whipping agent; Melt and gasifying gas form the gas-liquid mixed rotating fluid under the effect of spiral grooves 2; At this moment the glass of blowing agent powder surface at first melts and is coated on lime carbonate (or magnesiumcarbonate; Or the mixture of lime carbonate and magnesiumcarbonate) particle surface also mixes with high-temperature fusant; The high-temperature fusant gas that produces that is decomposed further foams when temperature reaches the decomposition temperature of lime carbonate (or magnesiumcarbonate), and wherein the add-on of whipping agent is 3 ~ 10% of a slag melt weight, after cooling off, is cut into chromium slag light floamed ceramic.
The present invention compared with prior art, its advantage is:
1, method provided by the invention can utilize chromium slag and red mud production to produce light floamed ceramic effectively, on a large scale; Its sub product is a ferrochrome; Industrial waste chromium slag and one step of red mud are converted into ferrochrome melt and slag melt; And make slag melt directly form light floamed ceramic, practiced thrift significant amount of energy;
2, low price chromium ion in the chromium slag and the iron ion in deleterious hexavalent chromium and the red mud are reduced into chromium metal and iron under the carbothermic reduction effect; And under 1655 ~ 1695 ℃ high temperature, form chromium, iron mixed melt; And produce with high-temperature slag and to separate, metallic iron and chromium content are less than 1% in the high-temperature slag;
3, can be according to the add-on of the content adjustment coal dust of carbon in the content of carbon in the content of iron ion in the content of chromium ion in the chromium slag, the red mud, the flyash and the coal gangue; Thereby can accurately control the content of carbon in the high-temperature fusant; The composition of above-mentioned raw materials is: chemical composition of PCA is C:3 ~ 20%, SiO 2: 5 ~ 36%, Al 2O 3: 10 ~ 25%, Fe 2O 3: 8 ~ 40%, CaO:5 ~ 30%, MgO:0.1 ~ 5%, Na 2O+K 2O:3 ~ 8%, SO 3: 0.1 ~ 1.5%; The coal gangue chemical ingredients is C:5 ~ 15%, SiO 2: 51 ~ 60%, Al 2O 3: 13 ~ 25%, Fe 2O 3: 3 ~ 6%, CaO:0.4 ~ 7%, MgO:0.5 ~ 5%, Na 2O+K 2O:1 ~ 3%, SO 3: 0.1 ~ 1%; Chromium dreg chemistry composition is SiO 2: 5 ~ 30%, Al 2O 3: 5 ~ 10%, CaO:15 ~ 44%, MgO:10 ~ 36%, Fe 2O 3: 4 ~ 11%, Cr 2O 6: 0.3 ~ 0.8%, Cr 2O 3: 5 ~ 35%; The red mud chemical ingredients is Fe 2O 3: 8 ~ 30%, SiO 2: 3 ~ 10%, Al 2O 3: 5 ~ 24%, CaO:15 ~ 30%, MgO:0.5 ~ 3%, Na 2O:0.5 ~ 4%, TiO 2: 3 ~ 10%;
4, the present invention is main with industrial waste, not only reduce production costs, and reduce environmental pollution, and economic environmental protection, waste material can reuse.
Description of drawings
Fig. 1 is the structural representation of the used foam device of the present invention;
Among the figure: foam device 1, spiral grooves 2, terminal fire district 3, middle-end foaming district 4, the district of end foaming just 5, high-temperature fusant inlet 6, whipping agent inlet 7.
Embodiment
In foam device shown in Figure 11; Whipping agent is pressed into through whipping agent inlet 7 and meets in the district of end foaming just 5 with the high-temperature fusant that flows into through slag high-temperature fusant inlet 6; The expansion of gasifying rapidly of water in the whipping agent, melt and gasifying gas form the gas-liquid mixed rotating fluid under the effect of spiral grooves 2, and at this moment the glass of blowing agent powder surface at first melts and is coated on lime carbonate (or magnesiumcarbonate; Or the mixture of lime carbonate and magnesiumcarbonate) particle surface also mixes with high-temperature fusant; The high-temperature fusant gas that produces that is decomposed further foams when temperature reaches the decomposition temperature of lime carbonate (or magnesiumcarbonate, or lime carbonate), makes the slag high-temperature fusant form light floamed ceramic; Wherein the add-on of whipping agent is 3 ~ 10% of a slag melt weight, after cooling, is cut into chromium slag light floamed ceramic.
Embodiment
Embodiment 1
(1) batching: chromium slag 30%, red mud 40%, flyash 10%, coal gangue 15%, silica sand 4.5%, coal dust 0.5%, and mix and make compound;
(2) preparation of whipping agent: whipping agent is that whipping agent powder, kaolin, water and water glass are: the suspended nitride that the 30:10:55:5 uniform mixing is processed with weight ratio; Wherein, The whipping agent powder is to be the 60:20:20 uniform mixing with the weight ratio by one or both and water glass of lime carbonate, magnesiumcarbonate and cullet powder, and it is that 3 μ m process that the levigate granularity in back was burnt till in dry back 400 ℃ of insulations in 1 hour;
(3) melting and reducing: with the 1100 ℃ of thorough mixing reduction under reducing atmosphere of above-mentioned compound; Briquetting is put in the high temperature molten bath then; Temperature is that 1655 ℃ of briquettings sink to below the slag melt liquid level and fusion; Iron that the reduction back forms and chromium form melt and sink to the bottom in molten bath, and float to the top in molten bath on the slag melt, and molten iron is separated with slag melt automatically;
(4) foaming: whipping agent is pressed into through whipping agent inlet 7 and meets in the district of end foaming just 5 with the high-temperature fusant that flows into through slag high-temperature fusant inlet 6; The expansion of gasifying rapidly of water in the whipping agent; Melt and gasifying gas form the gas-liquid mixed rotating fluid under the effect of spiral grooves 2; At this moment the glass of blowing agent powder surface at first melts and is coated on lime carbonate (or magnesiumcarbonate; Or lime carbonate and magnesiumcarbonate) particle surface and mix with high-temperature fusant; High-temperature fusant further decomposes the gas foaming of generation when temperature reaches the decomposition temperature of lime carbonate (or magnesiumcarbonate), and wherein the add-on of whipping agent is 3% of a slag melt weight, after cooling, is cut into chromium slag light floamed ceramic;
Through check, the chromium slag foam device slag light floamed ceramic bending strength that makes is 18Mpa.
Embodiment 2
(1) batching: chromium slag 35%, red mud 25%, flyash 12%, coal gangue 17%, silica sand 8%, coal dust 3%, and mix and make compound;
(2) preparation of whipping agent: whipping agent is that whipping agent powder, kaolin, water and water glass are: the suspended nitride that the 15:5:77:3 uniform mixing is processed with weight ratio; Wherein, The whipping agent powder is to be the 75:13:12 uniform mixing with the weight ratio by one or both and water glass of lime carbonate, magnesiumcarbonate and cullet powder, and it is that 6 μ m process that the levigate granularity in back was burnt till in dry back 550 ℃ of insulations in 2 hours;
(3) melting and reducing: with the 1200 ℃ of thorough mixing reduction under reducing atmosphere of above-mentioned compound; Briquetting is put in the high temperature molten bath then; Temperature is that 1675 ℃ of briquettings sink to below the slag melt liquid level and fusion; Iron that the reduction back forms and chromium form melt and sink to the bottom in molten bath, and float to the top in molten bath on the slag melt, and molten iron is separated with slag melt automatically;
(4) foaming: whipping agent is pressed into through whipping agent inlet 7 and meets in the district of end foaming just 5 with the high-temperature fusant that flows into through slag high-temperature fusant inlet 6; The expansion of gasifying rapidly of water in the whipping agent; Melt and gasifying gas form the gas-liquid mixed rotating fluid under the effect of spiral grooves 2; At this moment the glass of blowing agent powder surface at first melts bread and overlays on lime carbonate (or magnesiumcarbonate; Or the mixture of lime carbonate and magnesiumcarbonate) particle surface also mixes with high-temperature fusant; High-temperature fusant further decomposes the gas foaming of generation when temperature reaches the decomposition temperature of lime carbonate (or magnesiumcarbonate), and wherein the add-on of whipping agent is 7% of a slag melt weight, after cooling, is cut into chromium slag light floamed ceramic;
Through check, the chromium slag foam device slag light floamed ceramic bending strength that makes is 15Mpa.
Embodiment 3
(1) batching: chromium slag 40%, red mud 10%, flyash 15%, coal gangue 20%, silica sand 10%, coal dust 5%, and mix and make compound;
(2) preparation of whipping agent: whipping agent is that whipping agent powder, kaolin, water and water glass are: the suspended nitride that the 0.5:0.5:98:1 uniform mixing is processed with weight ratio; Wherein, The whipping agent powder is to be the 90:5:5 uniform mixing with the weight ratio by one or both and water glass of lime carbonate, magnesiumcarbonate and cullet powder, and it is that 10 μ m process that the levigate granularity in back was burnt till in dry back 700 ℃ of insulations in 3 hours;
(3) melting and reducing: with the 1300 ℃ of thorough mixing reduction under reducing atmosphere of above-mentioned compound; Briquetting is put in the high temperature molten bath then; Temperature is that 1695 ℃ of briquettings sink to below the slag melt liquid level and fusion; Iron that the reduction back forms and chromium form melt and sink to the bottom in molten bath, and float to the top in molten bath on the slag melt, and molten iron is separated with slag melt automatically;
(4) foaming: whipping agent is pressed into through whipping agent inlet 7 and meets in the district of end foaming just 5 with the high-temperature fusant that flows into through slag high-temperature fusant inlet 6; The expansion of gasifying rapidly of water in the whipping agent; Melt and gasifying gas form the gas-liquid mixed rotating fluid under the effect of spiral grooves 2; At this moment the glass of blowing agent powder surface at first melts bread and overlays on lime carbonate (or magnesiumcarbonate; Or the mixture of lime carbonate and magnesiumcarbonate) particle surface also mixes with high-temperature fusant; High-temperature fusant further decomposes the gas foaming of generation when temperature reaches the decomposition temperature of lime carbonate (or magnesiumcarbonate), and wherein the add-on of whipping agent is 10% of a slag melt weight, after cooling, is cut into chromium slag light floamed ceramic;
Through check, the chromium slag foam device slag light floamed ceramic bending strength that makes is 11Mpa.

Claims (2)

1. chromium slag chromium reduced blast furnace high-temperature fusant foaming method and foam device; It is characterized in that; The structure of foam device comprises: foam device 1, spiral grooves 2, terminal fire district 3, middle-end foaming district 4, the district of end foaming just 5, high-temperature fusant inlet 6, whipping agent inlet 7; Wherein, district 5 of end foaming just and middle-end foaming district 4 internal surfaces are respectively the sphere of R2 and R1, and three foaming district internal surfaces all have equally distributed spiral grooves 2.
2. chromium slag chromium reduced blast furnace high-temperature fusant foaming method according to claim 1 and foam device, it is characterized in that: foaming method specifically may further comprise the steps:
(1) batching: chromium slag 30 ~ 40%, red mud 40 ~ 10%, flyash 10 ~ 15%, coal gangue 15 ~ 20%, silica sand 4.5 ~ 10%, coal dust 0.5 ~ 5%, and mix and make compound;
(2) preparation of whipping agent: whipping agent is that whipping agent powder, kaolin, water and water glass are with weight ratio: the suspended nitride that 0.5 ~ 30:0.5 ~ 10:98 ~ 55:1 ~ 5 uniform mixing are processed; Wherein, The whipping agent powder is to be 60 ~ 90:20 ~ 5:20 ~ 5 uniform mixing by one or both and water glass of lime carbonate, magnesiumcarbonate and cullet powder with weight ratio, and it is that 3 ~ 10 μ m process that the levigate granularity in back was burnt till in 400 ~ 700 ℃ of insulations in dry back in 1-3 hour;
(3) melting and reducing: with 1100 ~ 1300 ℃ of thorough mixing reduction under reducing atmosphere of above-mentioned compound; Briquetting is put in the high temperature molten bath then; Temperature is that 1655 ~ 1695 ℃ of briquettings sink to below the slag melt liquid level and fusion; Iron that the reduction back forms and chromium form melt and sink to the bottom in molten bath, and float to the top in molten bath on the slag melt, and molten iron is separated with slag melt automatically;
(4) foaming: whipping agent is pressed into through whipping agent inlet 7 and meets in the district of end foaming just 5 with the high-temperature fusant that flows into through slag high-temperature fusant inlet 6; The expansion of gasifying rapidly of water in the whipping agent; Melt and gasifying gas form the gas-liquid mixed rotating fluid under the effect of spiral grooves 2; At this moment the glass of blowing agent powder surface at first melts bread and overlays on lime carbonate (or magnesiumcarbonate; Or the mixture of lime carbonate and magnesiumcarbonate) particle surface also mixes with high-temperature fusant; High-temperature fusant further decomposes the gas foaming of generation when temperature reaches the decomposition temperature of lime carbonate (or magnesiumcarbonate), and wherein the add-on of whipping agent is 3 ~ 10% of a slag melt weight, after cooling, is cut into chromium slag light floamed ceramic.
CN 201110398684 2011-12-06 2011-12-06 Chromium slag and chromium reducing furnace slag high-temperature melt foaming method and foaming device Expired - Fee Related CN102515825B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102815869A (en) * 2012-09-05 2012-12-12 北京盛康宁科技开发有限公司 Foam microcrystalline glass and preparation method thereof
CN106673682A (en) * 2016-12-30 2017-05-17 钢研晟华工程技术有限公司 Method for producing iron alloy and refractory material by utilizing solid wastes
CN109456064A (en) * 2019-01-04 2019-03-12 广东金意陶陶瓷集团有限公司 The preparation method of light-weight brick formula and preparation method thereof and functional light-weight brick
CN112479725A (en) * 2020-12-01 2021-03-12 中冶焦耐(大连)工程技术有限公司 Brick for dry quenching furnace cooling chamber and preparation method thereof
CN114394845A (en) * 2022-01-12 2022-04-26 湖南国发控股有限公司 High-chromium slag-content sintering formula and production process of synergistic foamed ceramic

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101190441A (en) * 2006-11-27 2008-06-04 陈书怡 Waste residue material modifying method
CN101289332A (en) * 2008-06-06 2008-10-22 昆明理工大学 Low-temperature ceramic foam material and production method thereof
CN102249731A (en) * 2010-09-27 2011-11-23 山东焦化集团有限公司 Method for producing foamed material from fused slag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101190441A (en) * 2006-11-27 2008-06-04 陈书怡 Waste residue material modifying method
CN101289332A (en) * 2008-06-06 2008-10-22 昆明理工大学 Low-temperature ceramic foam material and production method thereof
CN102249731A (en) * 2010-09-27 2011-11-23 山东焦化集团有限公司 Method for producing foamed material from fused slag

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102815869A (en) * 2012-09-05 2012-12-12 北京盛康宁科技开发有限公司 Foam microcrystalline glass and preparation method thereof
CN102815869B (en) * 2012-09-05 2014-06-25 北京盛康宁科技开发有限公司 Foam microcrystalline glass and preparation method thereof
CN106673682A (en) * 2016-12-30 2017-05-17 钢研晟华工程技术有限公司 Method for producing iron alloy and refractory material by utilizing solid wastes
CN109456064A (en) * 2019-01-04 2019-03-12 广东金意陶陶瓷集团有限公司 The preparation method of light-weight brick formula and preparation method thereof and functional light-weight brick
CN112479725A (en) * 2020-12-01 2021-03-12 中冶焦耐(大连)工程技术有限公司 Brick for dry quenching furnace cooling chamber and preparation method thereof
CN114394845A (en) * 2022-01-12 2022-04-26 湖南国发控股有限公司 High-chromium slag-content sintering formula and production process of synergistic foamed ceramic

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