CN102745892A - Method for directly producing mineral cotton with hot-melted titanium-containing blast furnace slag - Google Patents
Method for directly producing mineral cotton with hot-melted titanium-containing blast furnace slag Download PDFInfo
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- CN102745892A CN102745892A CN2012102047893A CN201210204789A CN102745892A CN 102745892 A CN102745892 A CN 102745892A CN 2012102047893 A CN2012102047893 A CN 2012102047893A CN 201210204789 A CN201210204789 A CN 201210204789A CN 102745892 A CN102745892 A CN 102745892A
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Abstract
The invention discloses a method for directly producing mineral cotton with hot-melted titanium-containing blast furnace slag. The method comprises the steps of introducing the hot-melted titanium-containing blast furnace slag with an acidity coefficient higher than 1.1 and a viscosity coefficient higher than 0.5 Pa.S into a slag ladle; simultaneously blowing coal gas to perform treatments of thermal insulation and homogenization for the hot-melted titanium-containing blast furnace slag in the slag ladle; and then centrifuging or blowing the treated hot-melted titanium-containing blast furnace slag to obtain mineral cotton fibers. Water consumption in a water-quenched slag process can be prevented, because the method is in no need of water-quenching the melted slag to a solid state, so that water can be saved effectively; and pollutions to atmosphere and surface water can be prevented. With the method, most of sensible heat of the blast furnace melted slag can be utilized effectively, thereby saving fuels effectively. Production cost can be reduced and production period is shortened because of omitting a reformulating process for adjusting the acidity of the melt by adding silica. The method has the characteristics of water conservation, energy conservation, environmental protection, low cost and simple and fast process, and realizes the integrated utilization of solid resources of the titanium-containing blast furnace slag.
Description
Technical field
The present invention relates to a kind of method of utilizing of blast furnace slag, especially a kind of method with hot melt titanium-containing blast furnace slag direct production slag wool.
Background technology
Blast furnace slag is the fittings that produces when smelting the pig iron, and the ordinary blast slag can be used as cement raw material, build the road or the starting material of products such as foundation backfill material, aggregate, but is the utilization under the cold conditions, and added value is lower; And contain the vanadium titanium blast furnace slag, and because of being unfavorable for the curing of cement, influence concrete bulk strength and stability, cause the utilization ratio of cement lower, a large amount of vanadium titanium blast furnace slags of for this reason storing up have become the bottleneck of enterprise development.
Common non-vanadium titanium ordinary blast slag is generally slag basic; Its acidity quotient is less than 1; Utilize its operating mine slag wool; Need a certain proportion of cold conditions blast furnace slag, silica (being used to adjust the acidity of slag) and fuel (coal dust, coke) are mixed,, become fine through whizzer again through acidity (1.1～1.8), temperature (1350～1400 ℃) requirement of cupola melting to operating mine slag wool.The shortcoming of this technology: when cupola furnace carries out secondary smelting to the blast furnace slag of cold conditions, need fuel coke, the amount of coke that 1 ton of slag wool of every production need consume is about 250kg.Coke is to be got by the raw coal conversion; Produce 1 ton of coke and need consume 1.25～1.35 tons in raw coal; It is about 20% that its process energy is lost, and at least 20% power loss arranged again, so with cupola furnace blast furnace slag is carried out the serious waste that secondary smelting can cause the energy after cupola furnace is to the blast furnace slag melting again; In addition; Blast furnace slag with cold conditions carries out melting; The sensible heat (1450 ℃) that from blast furnace, flows out melting slag is not utilized; And the temperature of blast furnace slag when being cooled to normal temperature by 1400 ℃ liberated heat (sensible heat) be about 1550～1750kJ/kg, the heat that blast furnace slag promptly per ton discharges is equivalent to 52.97～59.80kg standard coal equivalent.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method with hot melt titanium-containing blast furnace slag direct production slag wool.
For solving the problems of the technologies described above; The technical scheme that the present invention taked is: the hot melt attitude titanium-containing blast furnace slag of acidity quotient＞1.1, viscosity coefficient＞0.5PaS is introduced slag ladle, and the coal gas of jetting simultaneously carries out concurrent heating insulation, homogenizing processing to the hot melt attitude titanium-containing blast furnace slag in the slag ladle; Centrifugal or the winding-up of hot melt attitude titanium-containing blast furnace slag after will handling then obtains slag wool fiber.
Winding-up coal gas according to the invention makes hot melt attitude titanium-containing blast furnace slag keep 1340～1400 ℃, simultaneously hot melt attitude titanium-containing blast furnace slag is stirred, so that melt homogenization.
Coal gas of the present invention is coke-oven gas, or the mixed gas of blast furnace gas and coke-oven gas.
The acidity of hot melt attitude titanium-containing blast furnace slag according to the invention is 1.1～1.8, and viscosity coefficient is 0.5～2.5PaS.
The present invention adopts four roller whizzers to be centrifuged into fibre.
The present invention is contemplated that: confirm after lot of test, the analysis and research through titanium-containing blast furnace slag is carried out: at first the physics of titanium-containing blast furnace slag, chemical property are basicly stable; Contained titanium oxide belongs to low acidic oxides; The acidity quotient of titanium-containing blast furnace slag＞1.1 meet acidity (1.1～1.8) requirement that mineral wool is produced; Contained titanium oxide in next titanium-containing blast furnace slag is mainly by TiC, TiN, uhligite (CaTiO
3) constitute, tool is a bit sticky, and its viscosity coefficient＞0.5PaS when temperature is higher than 1300 ℃ satisfies melt and becomes (0.5～2.5PaS) requirement, and help producing macrofiber of a silk viscosity coefficient.
The present invention introduces slag ladle to hot melt attitude (the about 1450 ℃) titanium-containing blast furnace slag with above-mentioned performance; Be blown into coal gas and guarantee the one-tenth silk temperature of slag; No longer add acidic flux and carry out modifier treatment, no longer carry out secondary smelting, directly introduce four roller whizzers and jet fine through movable chute.From the above, the physics of titanium-containing blast furnace slag, chemical property meet the slag wool production requirement; Because of there is temperature drop in blast furnace slag in the process that derives; For the temperature of guaranteeing hot blast furnace slag (about 1450 ℃) satisfied one-tenth silk temperature (1340～1380 ℃) requirement of slag wool before importing four roller whizzers, adopt the form of winding-up coal gas that the slag in the slag ladle is carried out the concurrent heating insulation and handle.
Adopt the beneficial effect that technique scheme produced to be:
The present invention directly uses the titaniferous blast furnace slag operating mine slag wool of hot melt attitude, need slag water quenching not become solid-state, the consumption of water when having avoided Water Quenching Slag, and 1 ton of hot slag of every processing needs about 0.8～1.2 ton of consumption of new water during Water Quenching Slag, therefore water saving effectively; And macro-corrosion property steam that has produced when having avoided Water Quenching Slag and the filtered water that contains suspended substance and prussiate cause the pollution of atmosphere and surface water, and environmental benefit is obvious.
The present invention directly uses the titaniferous blast furnace slag of hot melt attitude, and most of sensible heat of blast furnace melting slag is effectively utilized, and the heat that blast furnace slag per ton discharges is equivalent to 52.97～59.80kg standard coal equivalent, therefore can practice thrift fuel effectively.
The present invention adopts the titaniferous blast furnace slag to omit and adds silica to the process of prescription again that melt carries out the acidity adjustment, reduced production cost, has shortened the production cycle, remarkable in economical benefits.
It is lower that the present invention has water saving, energy-saving and environmental protection, cost, and technology simply, characteristics efficiently; Realized the comprehensive utilization of useless resource admittedly of titaniferous blast furnace slag.
Embodiment
Below in conjunction with specific embodiment the present invention is done further detailed explanation.
In an embodiment, concrete grammar of the present invention comprises the steps:
(1) respectively the blast furnace slag of on-the-spot five kinds of different titaniferous amounts is taken a sample, according to company standard Q/CB 202-2011 blast furnace slag is carried out total analysis, analytical results is seen table 1.
(2) through TiO in the analysis of experiments blast furnace slag
2The relation of content and slag viscosity, and calculate the viscosity coefficient of five kinds of blast furnace slags, see table 1.
(3) calculate acidity quotient according to blast furnace slag total analysis result, see table 1.
(4) confirmed by testing data: the physicochemical property of titanium-containing blast furnace slag satisfies the requirement of producing slag wool.
Table 1: the composition of blast furnace slag and acidity, viscosity calculation result
The specific embodiment that below provides the hot melt blast furnace slag of above-mentioned five kinds of different titaniferous amounts directly to jet slag wool.
Embodiment 1: present embodiment adopts following process step with the method for titanium-containing blast furnace slag operating mine slag wool.
(1) according to the sampling of the effusive hot melt attitude of blast furnace titanium-containing blast furnace slag is detected, through detecting: acidity quotient=1.15, viscosity coefficient=1.05PaS, 1450 ℃ of temperature; I.e. blast furnace slag in the table 11.
(2) hot melt attitude titanium-containing blast furnace slag is directly introduced slag ladle, the coal gas of jetting simultaneously carries out concurrent heating insulation, homogenizing processing to the hot melt attitude titanium-containing blast furnace slag in the slag ladle, and holding temperature is 1340～1380 ℃.Described coal gas adopts coke-oven gas, or the mixed gas of blast furnace gas and coke-oven gas.
(3) the hot melt attitude titanium-containing blast furnace slag after will handling introduce four roller whizzers and jet slag wool fiber.
(4) detect product of the present invention according to thermal insulation with rock wool, slag wool and standard of articles thereof (GB/T11835-2007): not flammable; Acidity quotient＞1.1; Thermal conductivity≤0.044, organic content≤4%, slag ball content≤10%; Hot loading shrinkage temperature>=650 ℃, each item index all meets GB/T11835-2007.
Embodiment 2: present embodiment removes following difference, and other is identical with embodiment 1.
Acidity quotient=1.17, the viscosity coefficient=1.6PaS of hot melt attitude titanium-containing blast furnace slag, 1450 ℃ of temperature; I.e. blast furnace slag in the table 12.
Embodiment 3: present embodiment removes following difference, and other is identical with embodiment 1.
Acidity quotient=1.18, the viscosity coefficient=1.8PaS of hot melt attitude titanium-containing blast furnace slag, 1450 ℃ of temperature; I.e. blast furnace slag in the table 13.
Embodiment 4: present embodiment removes following difference, and other is identical with embodiment 1.
Acidity quotient=1.22, the viscosity coefficient=2.0PaS of hot melt attitude titanium-containing blast furnace slag, 1450 ℃ of temperature; I.e. blast furnace slag in the table 14.
Embodiment 5: present embodiment removes following difference, and other is identical with embodiment 1.
Acidity quotient=1.23, the viscosity coefficient=2.3PaS of hot melt attitude titanium-containing blast furnace slag, 1450 ℃ of temperature; I.e. blast furnace slag in the table 15.
Claims (5)
1. method with hot melt titanium-containing blast furnace slag direct production slag wool; It is characterized in that: the hot melt attitude titanium-containing blast furnace slag of acidity quotient＞1.1, viscosity coefficient＞0.5PaS is introduced slag ladle, and the coal gas of jetting simultaneously carries out concurrent heating insulation, homogenizing processing to the hot melt attitude titanium-containing blast furnace slag in the slag ladle; Centrifugal or the winding-up of hot melt attitude titanium-containing blast furnace slag after will handling then obtains slag wool fiber.
2. the method with hot melt titanium-containing blast furnace slag direct production slag wool according to claim 1; It is characterized in that: said winding-up coal gas makes hot melt attitude titanium-containing blast furnace slag keep 1340～1400 ℃; Simultaneously hot melt attitude titanium-containing blast furnace slag is stirred, so that melt homogenization.
3. the method with hot melt titanium-containing blast furnace slag direct production slag wool according to claim 1 is characterized in that: described coal gas is coke-oven gas, or the mixed gas of blast furnace gas and coke-oven gas.
4. the method with hot melt titanium-containing blast furnace slag direct production slag wool according to claim 1 is characterized in that: the acidity of said hot melt attitude titanium-containing blast furnace slag is 1.1～1.8, and viscosity coefficient is 0.5～2.5PaS.
5. according to described any one the method for claim 1-4, it is characterized in that: adopt four roller whizzers to be centrifuged into fibre with hot melt titanium-containing blast furnace slag direct production slag wool.
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| CN2012102047893A CN102745892A (en) | 2012-06-20 | 2012-06-20 | Method for directly producing mineral cotton with hot-melted titanium-containing blast furnace slag |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131534A (en) * | 1983-01-18 | 1984-07-28 | Nippon Cement Co Ltd | Production of rock wool |
| EP0970927A2 (en) * | 1998-07-10 | 2000-01-12 | Armstrong World Industries, Inc. | Fiberized mineral wool and method for making same |
| CN1400181A (en) * | 2002-09-02 | 2003-03-05 | 严煜 | Method for hot-charging, smelting and producing mineral wool fibre by adopting blast furnace |
| CN1931763A (en) * | 2006-09-30 | 2007-03-21 | 攀枝花环业冶金渣开发有限责任公司 | Slag wool of high titanium type blast furnace slag |
| CN101616873A (en) * | 2006-11-02 | 2009-12-30 | 罗克伍尔国际公司 | The method and apparatus that is used for the operating mine fibres |
| CN101704631A (en) * | 2009-11-13 | 2010-05-12 | 北京大学 | Method for manufacturing slag fiber by using thermal-state blast furnace slag |
-
2012
- 2012-06-20 CN CN2012102047893A patent/CN102745892A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131534A (en) * | 1983-01-18 | 1984-07-28 | Nippon Cement Co Ltd | Production of rock wool |
| EP0970927A2 (en) * | 1998-07-10 | 2000-01-12 | Armstrong World Industries, Inc. | Fiberized mineral wool and method for making same |
| CN1400181A (en) * | 2002-09-02 | 2003-03-05 | 严煜 | Method for hot-charging, smelting and producing mineral wool fibre by adopting blast furnace |
| CN1931763A (en) * | 2006-09-30 | 2007-03-21 | 攀枝花环业冶金渣开发有限责任公司 | Slag wool of high titanium type blast furnace slag |
| CN101616873A (en) * | 2006-11-02 | 2009-12-30 | 罗克伍尔国际公司 | The method and apparatus that is used for the operating mine fibres |
| CN101704631A (en) * | 2009-11-13 | 2010-05-12 | 北京大学 | Method for manufacturing slag fiber by using thermal-state blast furnace slag |
Non-Patent Citations (2)
| Title |
|---|
| 徐慧忠等: "《绝热材料生产及应用》", 31 August 2001, 中国建材工业出版 * |
| 戴淑芬: "《钢铁企业价值创造与盈利模式变化趋势》", 31 July 2012, 冶金工业出版社 * |
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