CN102503133B - Method for preparing red mud reduced slag hollow glass bead plate and iron reduction furnace - Google Patents
Method for preparing red mud reduced slag hollow glass bead plate and iron reduction furnace Download PDFInfo
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- CN102503133B CN102503133B CN 201110340259 CN201110340259A CN102503133B CN 102503133 B CN102503133 B CN 102503133B CN 201110340259 CN201110340259 CN 201110340259 CN 201110340259 A CN201110340259 A CN 201110340259A CN 102503133 B CN102503133 B CN 102503133B
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Abstract
The invention discloses to a method for preparing a red mud reduced slag hollow glass bead plate, which is characterized in that a structure of an iron reduction furnace includes an iron reduction furnace (1), a melting bath (2), a slag belting bath (3), a liquid iron belting bath (4), a feeder (5), a liquid iron passage (6), a liquid iron inlet (7), a slag melt outlet (8), a slag melt passage (9), a slag melt feeding port (10) and a compressed air outlet (11). The method includes addition of, by weight, 35-82.5% of red mud which is a major material, 3-15% of crude flint clay, 3-10% of waste glass powder, 1-15% of quartz sand, 10-20% of coal gangue and 0.5-5% of titanium dioxide. Industrial wastes are used as the main raw materials in the method, so that production cost is reduced, environment pollution is reduced, economization and environment protection are realized, and the wastes are reusable. The prepared red mud reduced slag hollow glass bead plate is light in weight and low in thermal conductivity and has fine heat insulation and decorative characteristics.
Description
Technical field
The present invention relates to a kind of preparation method and iron reduction furnace of red mud iron reduction furnace slag hollow glass bead plate, belong to architectural pottery fabricating technology field.
Background technology
The red mud iron reduction furnace slag hollow glass bead plate is mainly used in building and finishing material uses.Generally adopting at present the glass microballon plate, is a kind of consumption of natural resource, building and ornament materials that manufacturing cost is high.
The waste that the industrial waste red mud produces when being metallic aluminium smelting and commercial alumina production, environmental pollution is serious, also there is no in the world effective treating method.At present mainly adopt sintering process or Bayer process red mud to make refractory materials, cement or various filler to use, but relatively poor due to product properties, production cost is higher, added value is lower, and can't large-scale promotion application.In addition, contain a large amount of ferro elements in above-mentioned red mud, process as stated above, cause very large waste because ferro element can't reclaim.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome defects, utilize the Industry Waste rejected material, turn waste into wealth, the preparation method of production and application excellent property, red mud iron reduction furnace slag hollow glass bead plate that cost is low, its technical scheme is:
a kind of preparation method of red mud iron reduction furnace slag hollow glass bead plate, the structure of iron reduction furnace comprises: iron reduction furnace (1), molten bath (2), slag molten bath (3), iron bath (4), pan feeding machine (5), molten iron passage (6), molten iron entrance (7), slag melt outlet (8), slag melt passage (9), slag melt feeding port (10), compressed air outlet (11), add the green coke jewel take red mud as major ingredient, the cullet powder, quartz sand, coal gangue, titanium dioxide, the shared weight percent of each component is: red mud 35 ~ 82.5%, green coke jewel 3 ~ 15%, cullet powder 3 ~ 10%, quartz sand 1 ~ 15%, coal gangue 10 ~ 20%, titanium dioxide 0.5 ~ 5%, wherein, the iron oxide content of red mud is 8 ~ 40%, specifically comprise the following steps:
(1) batching: red mud 35 ~ 82.5%, green coke jewel 3 ~ 15%, cullet powder 3 ~ 10%, quartz sand 1 ~ 15%, coal gangue 10 ~ 20%, titanium dioxide 0.5 ~ 5%, and mix and make compound;
(2) melting and reducing: above-mentioned compound is added 1 ~ 5% coal dust, after fully reducing under 1000 ~ 1200 ℃ of reducing atmospheres, put in molten bath (2) in iron reduction furnace (1) by pan feeding machine (5) briquetting, temperature is 1550 ~ 1650 ℃, atmosphere is oxidizing atmosphere, briquetting sinks to below the slag melt liquid level and melting, control the height H of molten bath (2) slag melt upper surface and molten bath (2) bottom and the height h2 of molten iron level and molten bath (2) bottom by the feed rate of controlling pan feeding machine (5), the molten iron that forms after reduction sinks to the bottom of molten bath (2), and float to the top of molten bath (2) on slag melt, molten iron is separated automatically with slag melt,
(3) hollow glass micropearl blowing: slag melt enters slag melt feeding port (10) and delivers to the hollow glass micropearl that compressed air outlet (11) is blow molded into particle diameter 0.15 ~ 0.3mm.
The preparation method of described red mud iron reduction furnace slag hollow glass bead plate, with above-mentioned hollow glass micropearl, water glass and carboxymethyl cellulose take weight ratio as 90 ~ 98:7 ~ 1:3 ~ 1 is pressed into plate after evenly mixing, burnt till in 1 ~ 3 hour 450 ~ 600 ℃ of insulations, annealed 1 ~ 3 hour, naturally cool to room temperature, make the red mud iron reduction furnace slag hollow glass bead plate.
The preparation method of described red mud iron reduction furnace slag hollow glass bead plate, molten iron is discharged by iron bath (4), slag melt exports (8) by slag melt and slag melt passage (9) flows to slag molten bath (3) naturally, and enters slag melt feeding port (10).
The present invention compared with prior art, its advantage is:
1, method provided by the invention can utilize sintering process or Bayer process red mud to produce the red mud iron reduction furnace slag hollow glass micropearl effectively, on a large scale, its byproduct is iron, one step of industrial waste red mud is converted into molten iron and slag melt, and make slag melt directly be blow molded into hollow glass micropearl, saved large energy;
2, technique is simple, and the red mud iron reduction furnace slag hollow glass bead plate quality of production is light, and thermal conductivity is low, has better insulation and decorating feature;
3, in slag melt, unnecessary carbon can be got rid of in the oxidizing atmosphere in the slag molten bath in oxidation, increases whiteness and the high-temperature behavior of fiber;
4, the present invention take industrial waste as main raw material, not only reduces production costs, and reduces environmental pollution, economic environmental protection, and waste material can reuse.
Description of drawings
Fig. 1 is the structural representation of the present invention's iron reduction furnace used;
In figure: 1, iron reduction furnace, 2, the molten bath, 3, the slag molten bath, 4, iron bath, 5, the pan feeding machine, 6, the molten iron passage, 7, molten iron entrance, 8, slag melt outlet, 9, the slag melt passage, 10, slag melt feeding port, 11, compressed air outlet, 12, hollow glass micropearl, H is total liquid level in molten bath 2, h1 is the slag melt liquid level, and h2 is the molten iron level height.
Embodiment
in iron reduction furnace shown in Figure 1, compound adds 1 ~ 5% coal dust, after fully reducing under 1000 ~ 1200 ℃ of reducing atmospheres, put in molten bath (2) in reduction furnace (1) by pan feeding machine (5) briquetting, temperature is 1550 ~ 1650 ℃, atmosphere is oxidizing atmosphere, briquetting sinks to below the slag melt liquid level and melting, the molten iron proportion that forms after reduction sinks to more greatly the bottom of molten bath (2), and the slag melt proportion less molten iron surface of floating over, when molten iron level rises to molten iron level higher than iron bath (4), molten iron in molten bath (2) is discharged in iron bath (4) by molten iron entrance (7) and molten iron passage (6), and slag melt exports (8) by slag melt and slag melt passage (9) is discharged in slag molten bath (3), then slag melt enters slag melt feeding port (10) and delivers to compressed air outlet (11) and be blow molded into the hollow glass micropearl that particle diameter is 0.15 ~ 0.3mm (12).
Embodiment
(1) batching: red mud 35%, green coke jewel 15%, cullet powder 10%, quartz sand 15%, coal gangue 20%, titanium dioxide 5%, and mix and make compound, wherein, the iron oxide content of red mud is 8%;
(2) melting and reducing: above-mentioned compound is added 1% coal dust, after fully reducing under 1200 ℃ of reducing atmospheres, put in molten bath 2 in iron reduction furnace 1 by pan feeding machine 5 briquettings, temperature is 1550 ℃, atmosphere is oxidizing atmosphere, briquetting sinks to below the slag melt liquid level and melting, control the height H of molten bath 2 slag melt upper surfaces and 2 bottoms, molten bath and the height h2 of molten iron level and 2 bottoms, molten bath by the feed rate of controlling pan feeding machine 5, molten iron sinks to the bottom in molten bath 2, and float to the top in molten bath 2 on slag melt, molten iron is separated automatically with slag melt,
(3) hollow glass micropearl blowing: slag melt enters slag melt feeding port 10 and delivers to compressed air outlet 11 and be blow molded into the hollow glass micropearl that median size is 0.2mm;
(4) above-mentioned hollow glass micropearl, water glass and carboxymethyl cellulose evenly are pressed into plate after mixing take weight ratio as 90:7:3, burnt till in 1 hour 450 ℃ of insulations, annealed 1 hour, and naturally cooled to room temperature, make the red mud iron reduction furnace slag hollow glass bead plate.
Through check, the red mud iron reduction furnace slag hollow glass bead plate thermal conductivity that makes is 0.03w/m
2K.
(1) batching: red mud 58%, green coke jewel 9%, cullet powder 7%, quartz sand 8%, coal gangue 15%, titanium dioxide 3%, and mix and make compound, wherein, the iron oxide content of red mud is 24%;
(2) melting and reducing: above-mentioned compound is added 3% coal dust, after fully reducing under 1100 ℃ of reducing atmospheres, put in molten bath 2 in iron reduction furnace 1 by pan feeding machine 5 briquettings, temperature is 1600 ℃, atmosphere is oxidizing atmosphere, briquetting sinks to below the slag melt liquid level and melting, control the height H of molten bath 2 slag melt upper surfaces and 2 bottoms, molten bath and the height h2 of molten iron level and 2 bottoms, molten bath by the feed rate of controlling pan feeding machine 5, molten iron sinks to the bottom in molten bath 2, and float to the top in molten bath 2 on slag melt, molten iron is separated automatically with slag melt,
(3) hollow glass micropearl blowing: slag melt enters slag melt feeding port 10 and delivers to compressed air outlet 11 and be blow molded into the hollow glass micropearl that median size is 0.15mm;
(4) above-mentioned hollow glass micropearl, water glass and carboxymethyl cellulose evenly are pressed into plate after mixing take weight ratio as 904:4:2, burnt till in 2 hours 530 ℃ of insulations, annealed 2 hours, and naturally cooled to room temperature, make the red mud iron reduction furnace slag hollow glass bead plate.
Through check, the red mud iron reduction furnace slag hollow glass bead plate thermal conductivity that makes is 0.02w/m
2K.
(1) batching: red mud 82.5%, green coke jewel 3%, cullet powder 3%, quartz sand 1%, coal gangue 10%, titanium dioxide 0.5%, and mix and make compound, wherein, the iron oxide content of red mud is 40%;
(2) melting and reducing: above-mentioned compound is added 5% coal dust, after fully reducing under 1000 ℃ of reducing atmospheres, put in molten bath 2 in iron reduction furnace 1 by pan feeding machine 5 briquettings, temperature is 1650 ℃, atmosphere is oxidizing atmosphere, briquetting sinks to below the slag melt liquid level and melting, control the height H of molten bath 2 slag melt upper surfaces and 2 bottoms, molten bath and the height h2 of molten iron level and 2 bottoms, molten bath by the feed rate of controlling pan feeding machine 5, molten iron sinks to the bottom in molten bath 2, and float to the top in molten bath 2 on slag melt, molten iron is separated automatically with slag melt,
(3) hollow glass micropearl blowing: slag melt enters slag melt feeding port 10 and delivers to compressed air outlet 11 and be blow molded into the hollow glass micropearl that particle diameter is 0.3mm;
Be pressed into plate after above-mentioned hollow glass micropearl, water glass and carboxymethyl cellulose are evenly mixed take weight ratio as 98:1:1, burnt till in 3 hours 600 ℃ of insulations, annealed 3 hours, naturally cool to room temperature, make the red mud iron reduction furnace slag hollow glass bead plate.
Through check, the red mud iron reduction furnace slag hollow glass bead plate thermal conductivity that makes is 0.07w/m
2K.
Claims (2)
1. the preparation method of a red mud iron reduction furnace slag hollow glass bead plate, it is characterized in that, the structure of iron reduction furnace comprises: iron reduction furnace (1), molten bath (2), slag molten bath (3), iron bath (4), pan feeding machine (5), molten iron passage (6), molten iron entrance (7), slag melt outlet (8), slag melt passage (9), slag melt feeding port (10), compressed air outlet (11), add the green coke jewel take red mud as major ingredient, the cullet powder, quartz sand, coal gangue, titanium dioxide, the shared weight percent of each component is: red mud 35 ~ 82.5%, green coke jewel 3 ~ 15%, cullet powder 3 ~ 10%, quartz sand 1 ~ 15%, coal gangue 10 ~ 20%, titanium dioxide 0.5 ~ 5%, wherein, the iron oxide content of red mud is 8 ~ 40%, specifically comprise the following steps:
(1) batching: red mud 35 ~ 82.5%, green coke jewel 3 ~ 15%, cullet powder 3 ~ 10%, quartz sand 1 ~ 15%, coal gangue 10 ~ 20%, titanium dioxide 0.5 ~ 5%, and mix and make compound;
(2) melting and reducing: above-mentioned compound is added 1 ~ 5% coal dust, after fully reducing under 1000 ~ 1200 ℃ of reducing atmospheres, put in molten bath (2) in iron reduction furnace (1) by pan feeding machine (5) briquetting, temperature is 1550 ~ 1650 ℃, atmosphere is oxidizing atmosphere, briquetting sinks to below the slag melt liquid level and melting, control the height H of molten bath (2) slag melt upper surface and molten bath (2) bottom and the height h2 of molten iron level and molten bath (2) bottom by the feed rate of controlling pan feeding machine (5), the molten iron that forms after reduction sinks to the bottom of molten bath (2), and float to the top of molten bath (2) on slag melt, molten iron is separated automatically with slag melt,
(3) hollow glass micropearl blowing: slag melt enters slag melt feeding port (10) and delivers to the hollow glass micropearl that compressed air outlet (11) is blow molded into particle diameter 0.15 ~ 0.3mm;
With above-mentioned hollow glass micropearl, water glass and carboxymethyl cellulose take weight ratio as 90 ~ 98:7 ~ 1:3 ~ 1 is pressed into plate after evenly mixing, burnt till in 1 ~ 3 hour 450 ~ 600 ℃ of insulations, annealed 1 ~ 3 hour, and naturally cooled to room temperature, make the red mud iron reduction furnace slag hollow glass bead plate.
2. the preparation method of red mud iron reduction furnace slag hollow glass bead plate according to claim 1, it is characterized in that: molten iron is discharged by iron bath (4), slag melt exports (8) by slag melt and slag melt passage (9) flows to slag molten bath (3) naturally, and enters slag melt feeding port (10).
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| CN 201110340259 CN102503133B (en) | 2011-11-02 | 2011-11-02 | Method for preparing red mud reduced slag hollow glass bead plate and iron reduction furnace |
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| CN 201110340259 CN102503133B (en) | 2011-11-02 | 2011-11-02 | Method for preparing red mud reduced slag hollow glass bead plate and iron reduction furnace |
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| CN102503133B true CN102503133B (en) | 2013-06-12 |
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| CN101134985A (en) * | 2007-03-15 | 2008-03-05 | 大连熔融还原设备制造有限公司 | Smelting-separating furnace iron-smelting method for coal radical metallized pellet reduction |
| CN101538131A (en) * | 2009-04-14 | 2009-09-23 | 桂林工学院 | Method for preparing sintering-expanded haydite by taking red mud of Bayer process as main raw material |
| CN101624638B (en) * | 2009-08-14 | 2012-02-01 | 杜辉 | Gas-burning reducing iron-fining furnace and one-step reducing iron-fining method thereof |
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