CN106625999A - System and method for producing mineral fiberboard by utilizing red mud slag - Google Patents
System and method for producing mineral fiberboard by utilizing red mud slag Download PDFInfo
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- CN106625999A CN106625999A CN201710015250.6A CN201710015250A CN106625999A CN 106625999 A CN106625999 A CN 106625999A CN 201710015250 A CN201710015250 A CN 201710015250A CN 106625999 A CN106625999 A CN 106625999A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
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Abstract
The invention discloses a system and a method for producing mineral fiberboard by utilizing red mud slag. The method comprises the following steps: preparing red mud slag and an additive, wherein the additive comprises one or more of fly ash, quick lime, acetylene sludge, river sand and waste glass; respectively performing fine grinding on the red mud slag and the additive so as to obtain red mud powder and a powdered additive; performing magnetic separation on the red mud powder, and removing iron in the red mud powder; adding the powdered additive into the red mud powder without iron, uniformly mixing, feeding into a heat accumulating type melting furnace for melting, and maintaining the temperature so as to obtain liquid slag with uniform internal components; feeding the liquid slag into yarn making equipment for making yarns so as to obtain primary mineral fibers; deslagging and drying the primary mineral fibers so as to obtain finished mineral fibers; and pressing and curing the finished mineral fibers by curable glue, thereby obtaining the mineral fiberboard. According to the method disclosed by the invention, the mineral fiberboard is produced by utilizing the waste red mud slag, and the made mineral fiberboard is low in density and excellent in thermal insulation effect.
Description
Technical field
The invention belongs to waste material utilizes field, and in particular to a kind of utilization red mud slag production mineral fiber tilesn is
System and method.
Background technology
Red mud slag is that red mud extracts the secondary waste after iron, is a kind of large waste material instantly, at present due to skill
Art is limited and is not obtained by.Red mud slag is mainly with SiO2、CaO、Al2O3Based on composition, its chemical composition is for building with production
The raw material of mineral fiber tilesn such as basalt, diabase is similar.
Mineral fibres is a kind of inorfil, with insulation, it is heat-insulated, fire-retardant the features such as, be a kind of excellent construction material.
Natural mineral fibres reserves are few, and at present most of mineral fibres is adjusted by proportioning using different natural minerals
Chemical composition production.Exploitation natural minerals need to pay the costs such as cost of winning and environmental disruption.Due to the chemistry of red mud slag
Composition is similar with the chemical composition of mineral fibres, is in theory feasible hence with red mud slag production mineral fibres.Utilize
Red mud slag production mineral fibres has big advantage.
The content of the invention
It is an object of the invention to provide the system and method that a kind of utilization red mud slag produces mineral fiber tilesn is planted, to solve mesh
The difficult problem that front red mud slag is difficult by.
The system that the utilization red mud slag that the present invention is provided produces mineral fiber tilesn, including：
First atomizer mill, exports with red mud slag entrance and red mud powder；
Magnetic separator, with red mud powder entrance and except the outlet of iron red mud powder, the red mud powder entrance and first atomizer mill
Red mud powder outlet be connected；
Second atomizer mill, exports with additive entrance and powder additive；
Mixer, it is described except iron red mud powder enters with except iron red mud powder entrance, powder additive entrance and mixture outlet
With the magnetic separator except the outlet of iron red mud powder is connected, the powder additive entrance and the powder additive export phase to mouth
Even；
Heat accumulating type melting furnace, with mixture inlet and liquid slag outlet, the mixture inlet and the mixer
Mixture outlet is connected；
Wire producing machine, exports with liquid slag entrance and primary mineral fibre, and the liquid slag entrance is molten with the heat accumulating type
The liquid slag outlet for changing stove is connected；
Slag remover, with primary mineral fibre entrance and slagging-off mineral fibres outlet, the primary mineral fibre entrance with
The primary mineral fibre outlet of the wire producing machine is connected；
Drying machine, with slagging-off mineral fibres entrance and finished product mineral fibres outlet, it is described slagging-off mineral fibres entrance with
The slagging-off mineral fibres outlet of the slag remover is connected；
Press, with finished product mineral fibres entrance, glue entrance and primary mineral fibre plate exit, the finished product mineral
Fiber entry is connected with the finished product mineral fibres outlet of the drying machine；
Curing oven, with primary mineral fibre plate entrance and mineral fibres plate exit, the primary mineral fibre plate entrance
It is connected with the primary mineral fibre plate exit of the press.
In one embodiment of the invention, the heat accumulating type melting furnace includes melting furnace and regenerative furnace；
The mixture inlet and liquid slag outlet are arranged in the melting furnace, and the melting furnace is additionally provided with hot cigarette
Gas outlet, pre-heating fuel gas entrance, preheated-combustion-supporting wind entrance；
The regenerative furnace is provided with fuel gas entrance, combustion air entrance, heat smoke entrance, pre-heating fuel gas and exports, preheats and help
The outlet of combustion wind and exhanst gas outlet, the heat smoke entrance is connected with the heat smoke outlet of the melting furnace, the pre-heating fuel gas
Outlet is connected with the pre-heating fuel gas entrance of the melting furnace, and the preheated-combustion-supporting wind exports the preheated-combustion-supporting with the melting furnace
Wind entrance is connected.
The method that the use said system that the present invention is provided produces mineral fiber tilesn using red mud slag, comprises the steps：
Prepare red mud slag and additive, the additive is included in flyash, quick lime, carbide slag, river sand and cullet
One or more；
The red mud slag and the additive are carried out into respectively fine grinding, red mud powder and powder additive is obtained；
The red mud powder is carried out into magnetic separation, the iron in red mud powder is removed；
The powder additive is added toward the red mud powder except iron and be well mixed, be then fed into the heat accumulating type melting furnace
Interior melting, and be incubated, obtain the homogeneous liquid slag of internal component；
The liquid slag is sent into throwing in the wire producing machine, primary mineral fibre is obtained；
The primary mineral fibre is removed the gred and is dried, finished product mineral fibres is obtained；
It is described that finished product mineral fibres is suppressed with solidified glue and solidified, obtain mineral fiber tilesn.
In one embodiment of the invention, the mass ratio of the red mud slag and the additive is 10:1-5:4.
In one embodiment of the invention, the mass ratio of the red mud slag and the additive is 10:3-2:1.
In one embodiment of the invention, in the red mud powder particle diameter≤50 μm part >=90wt%.
In one embodiment of the invention, particle diameter≤50 μm of the powder additive.
In one embodiment of the invention, the heating-up temperature of the heat accumulating type melting furnace is 1200-1400 DEG C.
In one embodiment of the invention, the time that the mixed powder is incubated after melting in heat accumulating type melting furnace
For 15-25min.
In one embodiment of the invention, the fibre length of the mineral fiber tilesn be 1-100mm, fiber it is average
A diameter of 4.6-5.2 μm.
The present invention improves the value of red mud slag using discarded red mud slag production mineral fiber tilesn.
The present invention has carried out further slagging-off, therefore obtained mineral fibres to primary mineral fibre obtained in throwing device
The density of plate is less, its better heat preservation.
Additionally, red mud slag wide material sources, with low cost, and heat accumulating type melting furnace fuel consumption is few, energy saving, therefore
The low production cost of obtained mineral fiber tilesn of the invention.
Description of the drawings
Fig. 1 is a kind of structural representation of the system of the utilization red mud slag production mineral fiber tilesn in the embodiment of the present invention；
Fig. 2 is the process chart that a kind of utilization red mud slag in the embodiment of the present invention produces mineral fiber tilesn.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
It is only descriptive purpose to apply example, rather than limitation of the present invention.
It should be noted that all percentages according to the present invention are mass percent.
As shown in figure 1, the system that the utilization red mud slag that the present invention is provided produces mineral fiber tilesn includes：
First atomizer mill 1, magnetic separator 2, the second atomizer mill 3, mixer 4, heat accumulating type melting furnace 5, wire producing machine 6, slag remover
7th, drying machine 8, press 9 and curing oven 10.
Wherein, there is the first atomizer mill 1 red mud slag entrance and red mud powder to export.
Magnetic separator 2 has red mud powder entrance and the red mud powder except the outlet of iron red mud powder, red mud powder entrance and the first atomizer mill
Outlet is connected.
There is second atomizer mill 3 additive entrance and powder additive to export；
Mixer 4 have remove iron red mud powder entrance, powder additive entrance and mixture outlet, except iron red mud powder entrance with
Magnetic separator is connected except the outlet of iron red mud powder, and powder additive entrance and powder additive are exported and be connected.
There is heat accumulating type melting furnace 5 mixture inlet and liquid slag to export, and mixture inlet goes out with the mixture of mixer
Mouth is connected.
There is wire producing machine 6 liquid slag entrance and primary mineral fibre to export, the liquid of liquid slag entrance and heat accumulating type melting furnace
The outlet of body slag is connected.
Slag remover 7 has primary mineral fibre entrance and slagging-off mineral fibres outlet, primary mineral fibre entrance and throwing
The primary mineral fibre outlet of machine is connected.
Drying machine 8 has slagging-off mineral fibres entrance and the outlet of finished product mineral fibres, slagging-off mineral fibres entrance and slagging-off
The slagging-off mineral fibres outlet of machine is connected.
Press 9 has finished product mineral fibres entrance, glue entrance and primary mineral fibre plate exit, finished product mineral fibres
Entrance is connected with the finished product mineral fibres outlet of drying machine.
Curing oven 10 has primary mineral fibre plate entrance and mineral fibres plate exit, primary mineral fibre plate entrance and pressure
The primary mineral fibre plate exit of machine processed is connected.
Heat accumulating type melting furnace 5 includes melting furnace 501 and regenerative furnace 502, and mixture inlet and liquid slag outlet are arranged on molten
Change on stove 501.In a preferred embodiment of the invention, melting furnace 501 be additionally provided with heat smoke outlet, pre-heating fuel gas entrance,
Preheated-combustion-supporting wind entrance；Regenerative furnace 502 be provided with fuel gas entrance, combustion air entrance, heat smoke entrance, pre-heating fuel gas outlet,
Preheated-combustion-supporting wind is exported and exhanst gas outlet, and heat smoke entrance is connected with the heat smoke outlet of melting furnace 501, the outlet of pre-heating fuel gas
It is connected with the pre-heating fuel gas entrance of melting furnace 501, preheated-combustion-supporting wind exports the preheated-combustion-supporting wind entrance phase with melting furnace 501
Even.
The method of the utilization red mud slag production mineral fiber tilesn that the present invention is provided is comprised the following steps：
Prepare red mud slag and additive；
Red mud slag and additive are carried out respectively fine grinding, red mud powder and powder additive is obtained；
Red mud powder is carried out into magnetic separation, the iron in red mud powder is removed；
Powder additive is added toward the red mud powder except iron and is well mixed, be then fed into melting in heat accumulating type melting furnace,
And be incubated, obtain the homogeneous liquid slag of internal component；
Liquid slag is sent into throwing in throwing equipment, primary mineral fibre is obtained；
Primary mineral fibre is removed the gred and is dried, finished product mineral fibres is obtained；
Finished product mineral fibres is suppressed with solidified glue, mineral fiber tilesn is obtained.
The present invention improves the value of red mud slag using discarded red mud slag production mineral fiber tilesn.
The present invention has carried out further slagging-off, therefore obtained mineral fibres to primary mineral fibre obtained in throwing device
The density of plate is less, its better heat preservation.
Additionally, red mud slag wide material sources, with low cost, and heat accumulating type melting furnace fuel consumption is few, energy saving, therefore
The low production cost of obtained mineral fiber tilesn of the invention.
The present invention melts red mud slag using heat accumulating type melting furnace, and heat accumulating type melting furnace adopts gas heating.Due to red mud slag
In can contain di-iron trioxide, when using furnace melting, the effect of the graphite electrode in electric furnace causes, the atmosphere in electric furnace
It is reducing atmosphere, the di-iron trioxide in red mud slag can be caused to be reduced to simple substance, the presence of metallic iron can causes to be difficult to produce
Fiber or fiber are too short.Heat accumulating type melting furnace adopts gas heating, internal atmosphere to be not result in metallic iron for oxidizing atmosphere
Occur.Additionally, metal bath can be pre-formed during furnace melting, generate heat by the starting the arc between graphite electrode and metal bath, metal melts
The presence in pond can cause to form metal inclusion in Primary Processing, affect the generation of mineral fibres, and gas furnace then will not be produced
These problems.Mix after red mud slag and additive are finely ground and enter heat accumulating type melting furnace, can mix during melting
Evenly.
Heat accumulating type melting furnace adopts gas heating, can discharge heat smoke.In the preferred embodiment of the invention, by what is discharged
Heat smoke is also fed into preheating in heat storage and sends into fuel and combustion air, reclaims the heat of heat smoke.
The particle diameter of red mud powder is less, and the effect of magnetic separation and melting is better.In the preferred embodiment of the invention, in red mud powder
Part >=the 90wt% of particle diameter≤50 μm.In the same manner, the particle diameter of additive is less, and the effect of melting is higher, currently preferred
In embodiment, particle diameter≤50 μm of powder additive.In the further preferred embodiment of the present invention, red mud powder and powdery add
The particle diameter of agent≤10 μm.
SiO during the purpose of addition additive is to adjust liquid slag toward red mud slag2、CaO、Al2O3It is total with MgO
Content, its total content is higher, and the quality of final obtained mineral fiber tilesn is better.Additive used in the present invention includes fine coal
One or more in ash, quick lime, carbide slag, river sand and cullet.In the preferred embodiment of the invention, red mud slag and add
Plus the mass ratio of agent is 10:1-5:4.In a further preferred embodiment, the mass ratio of red mud slag and additive is 10:3-2:
1。
In a preferred embodiment of the invention, additive be lime stone, red mud slag and lime stone mass ratio be 10:1-
10:3.In another preferred embodiment of the invention, it is 10 that additive is the mass ratio of flyash, red mud slag and flyash:1-10:
2。
The SiO in liquid slag in the present invention2、CaO、Al2O3With the total content >=85wt% of MgO.Wherein, in the present invention
SiO in preferred embodiment, in liquid slag2Content be 30-40wt%.In the preferred embodiment of the invention, liquid slag
In CaO content be 5-30wt%.Al in the preferred embodiment of the invention, in liquid slag2O3Content be 20-
30wt%.In the preferred embodiment of the invention, the content of the MgO in liquid slag is 10-30wt%.In currently preferred reality
Na in applying example, in liquid slag2O、K2The total amount of the alkali metal oxides such as O is not more than 10wt%.
In the preferred embodiment of the invention, the heating-up temperature of heat accumulating type melting furnace is 1200-1400 DEG C.This temperature be enough to
Melting red mud powder, and do not result in thermal waste.Further, since the temperature of liquid slag directly affects mineral fibres obtained in throwing
Quality, and when the temperature of liquid slag is in 1200-1400 DEG C of temperature range, obtained mineral fibres quality preferably, therefore, can
The process of temperature adjustment, simplifies technological process before to omit throwing.
Red mud powder and powder additive also need insulation a period of time after melting in heat accumulating type melting furnace so that after melting
Liquid slag inside is homogeneous.In the preferred embodiment of the invention, under above-mentioned heating-up temperature, the time of insulation is 15-25min.
In the preferred embodiment of the invention, the fibre length of mineral fiber tilesn is 1-100mm, and average fibre diameter is
4.6-5.2 μm, the quality of obtained mineral fiber tilesn is good.
Below with reference to specific embodiment, the present invention will be described.Institute's taking technique condition value is in following embodiments
Exemplary, its desirable number range is as shown in foregoing summary.Detection method used by following embodiments is one's own profession
The conventional detection method of industry.
Embodiment 1
Technological process production mineral fiber tilesn of the present embodiment using the system shown in Fig. 1 and shown in Fig. 2, it is specific as follows：
Prepare 3000kg red mud slags, 300kg flyash and 600kg quick limes.
Red mud slag is sent into the first atomizer mill 1, flyash and quick lime is sent into the second atomizer mill 3 and carries out fine grinding respectively,
Until there is particle diameter≤50 μm of 91wt% in red mud powder, and the particle diameter of flyash and calcium lime powder≤50 μm.
Red mud powder is sent into and carry out in magnetic separator 2 magnetic separation, remove the iron in red mud powder.
It is well mixed sending into mixer 4 except the red mud powder and flyash and pulverized limestone of iron, is then fed into heat accumulating type and melts
In melting furnace 5, melt at a temperature of 1200 DEG C, 25min is incubated after allowing, obtain the homogeneous liquid slag of internal component.
Liquid slag is sent into wire producing machine 6, liquid slag is blown out into mineral fibres by being blown technology for making tobacco threds, obtain primary ore deposit
Fibres.
Removed the gred and be dried during primary mineral fibre is sequentially sent into slag remover 7 and drying machine 8, obtained finished product mineral fine
Dimension.
Finished product mineral fibres is sent into press 9 and is suppressed with solidified glue, be then re-fed into curing oven 10 solid
Change, obtain mineral fiber tilesn.
Cutting after again mineral fiber tilesn is cooled down is packaged into finished product.
Wherein, the melting furnace 501 of heat accumulating type melting furnace can discharge heat smoke, and heat smoke is also fed into heat accumulating type melting furnace
Regenerative furnace 502 in pre-heating fuel and combustion air.
SiO in the liquid slag obtained in this enforcement2Content be 30wt%, the content of CaO is 18wt%, Al2O3Content
For 30wt%, the content of MgO is 10wt%, Na2O and K2The total amount of the alkali metal oxides such as O is 9wt%.
The average length of the fiber of the finished product mineral fiber tilesn in the present embodiment is 1-100mm, and average fibre diameter is 5 μ
M, fiberboard density is 185kg/m3, and shot content is less than 4%, and tensile strength is 16KPa, and compressive strength is 80KPa, fire prevention etc.
Level is A levels, meets the requirement of GB GB/T25975-2010.
Embodiment 2
Technological process production mineral fiber tilesn of the present embodiment using the system shown in Fig. 1 and shown in Fig. 2, it is specific as follows：
Prepare 3000kg red mud slags, 300kg carbide slags, 900kg quick limes and 300kg river sands.
Red mud slag is sent into the first atomizer mill 1, carbide slag, quick lime and river sand are sent into the second atomizer mill 3 and carried out respectively
Fine grinding, until the particle diameter of red mud powder, calcium carbide ground-slag, calcium lime powder and river sand powder≤50 μm.
Red mud powder is sent into and carry out in magnetic separator 2 magnetic separation, remove the iron in red mud powder.
It is well mixed sending into mixer 4 with calcium carbide ground-slag, pulverized limestone and river sand powder except the red mud powder of iron, is then fed into
Heat accumulating type melts in melting furnace, melts at a temperature of 1400 DEG C, and 15min is incubated after allowing, and obtains the homogeneous liquid slag of internal component.
Liquid slag is sent into wire producing machine 6, liquid slag is blown out into mineral fibres by being blown technology for making tobacco threds, obtain primary ore deposit
Fibres.
Removed the gred and be dried during primary mineral fibre is sequentially sent into slag remover 7 and drying machine 8, obtained finished product mineral fine
Dimension.
Finished product mineral fibres is sent into press 9 and is suppressed with solidified glue, be then re-fed into curing oven 10 solid
Change, obtain mineral fiber tilesn.
Cutting after again mineral fiber tilesn is cooled down is packaged into finished product.
Wherein, the melting furnace 501 of heat accumulating type melting furnace can discharge heat smoke, and heat smoke is also fed into heat accumulating type melting furnace
Regenerative furnace 502 in pre-heating fuel and combustion air.
SiO in the liquid slag obtained in this enforcement2Content be 35wt%, the content of CaO is 30wt%, Al2O3Content
For 20wt%, the content of MgO is 20wt%, Na2O and K2The total amount of the alkali metal oxides such as O is 5wt%.
The average length of the fiber of the finished product mineral fiber tilesn in the present embodiment is 1-100mm, and average fibre diameter is 5.2
μm, fiberboard density is 188kg/m3, and shot content is less than 4.1%, and tensile strength is 18KPa, and compressive strength is 86KPa, prevents
Fiery grade is A levels, meets the requirement of GB GB/T25975-2010.
Embodiment 3
Technological process production mineral fiber tilesn of the present embodiment using the system shown in Fig. 1 and shown in Fig. 2, it is specific as follows：
Prepare 3000kg red mud slags, 600kg flyash, 900kg quick limes, 300kg carbide slags, 300kg river sands and 300kg
Cullet.
Red mud slag is sent into the first atomizer mill 1, flyash, quick lime, carbide slag, river sand and cullet send into the second fine grinding
Carry out fine grinding in machine 3 respectively, until in red mud powder, the grain of flyash, calcium lime powder, calcium carbide ground-slag, river sand powder and waste glass powder
Footpath≤10 μm.
Red mud powder is sent into and carry out in magnetic separator 2 magnetic separation, remove the iron in red mud powder.
Mixer 4 will be sent into except the red mud powder of iron with flyash, calcium lime powder, calcium carbide ground-slag, river sand powder and waste glass powder
In be well mixed, be then fed into heat accumulating type and melt in melting furnace, at a temperature of 1300 DEG C melt, 20min is incubated after allowing, obtain in
The liquid slag of portion's uniform component.
Liquid slag is sent into wire producing machine 6, liquid slag is blown out into mineral fibres by being blown technology for making tobacco threds, obtain primary ore deposit
Fibres.
Removed the gred and be dried during primary mineral fibre is sequentially sent into slag remover 7 and drying machine 8, obtained finished product mineral fine
Dimension.
Finished product mineral fibres is sent into press 9 and is suppressed with solidified glue, be then re-fed into curing oven 10 solid
Change, obtain mineral fiber tilesn.
Cutting after again mineral fiber tilesn is cooled down is packaged into finished product.
Wherein, the melting furnace 501 of heat accumulating type melting furnace can discharge heat smoke, and heat smoke is also fed into heat accumulating type melting furnace
Regenerative furnace 502 in pre-heating fuel and combustion air.
SiO in the liquid slag obtained in this enforcement2Content be 40wt%, the content of CaO is 10wt%, Al2O3Content
For 20wt%, the content of MgO is 16wt%, Na2O and K2The total amount of the alkali metal oxides such as O is 7wt%.
The average length of the fiber of the finished product mineral fiber tilesn in the present embodiment is 1-100mm, and average fibre diameter is 4.6
μm, fiberboard density is 179kg/m3, and shot content is less than 3.9%, and tensile strength is 15.6KPa, and compressive strength is 81KPa,
Fire-protection rating is A levels, meets the requirement of GB GB/T25975-2010.
Embodiment 4
Technological process production mineral fiber tilesn of the present embodiment using the system shown in Fig. 1 and shown in Fig. 2, it is specific as follows：
Prepare 3000kg red mud slags and 300kg flyash.
Red mud slag is sent into the first atomizer mill 1, flyash the second atomizer mill 3 of feeding carries out respectively fine grinding, until red mud
The particle diameter of powder and flyash≤30 μm.
Red mud powder is sent into and carry out in magnetic separator 2 magnetic separation, remove the iron in red mud powder.
It is well mixed sending into mixer 4 with flyash except the red mud powder of iron, is then fed into heat accumulating type and melts in melting furnace,
Melt at a temperature of 1350 DEG C, 25min is incubated after allowing, obtain the homogeneous liquid slag of internal component.
Liquid slag is sent into wire producing machine 6, liquid slag is blown out into mineral fibres by being blown technology for making tobacco threds, obtain primary ore deposit
Fibres.
Removed the gred and be dried during primary mineral fibre is sequentially sent into slag remover 7 and drying machine 8, obtained finished product mineral fine
Dimension.
Finished product mineral fibres is sent into press 9 and is suppressed with solidified glue, be then re-fed into curing oven 10 solid
Change, obtain mineral fiber tilesn.
Cutting after again mineral fiber tilesn is cooled down is packaged into finished product.
Wherein, the melting furnace 501 of heat accumulating type melting furnace can discharge heat smoke, and heat smoke is also fed into heat accumulating type melting furnace
Regenerative furnace 502 in pre-heating fuel and combustion air.
SiO in the liquid slag obtained in this enforcement2Content be 30wt%, the content of CaO is 5wt%, Al2O3Content
For 25wt%, the content of MgO is 30wt%, Na2O and K2The total amount of the alkali metal oxides such as O is 6wt%.
The average length of the fiber of the finished product mineral fiber tilesn in the present embodiment is 1-100mm, and average fibre diameter is 4.8
μm, fiberboard density is 178kg/m3, and shot content is less than 3.6%, and tensile strength is 15KPa, and compressive strength is 77KPa, prevents
Fiery grade is A levels, meets the requirement of GB GB/T25975-2010.
Knowable to above-described embodiment, the obtained mineral fiber tilesn quality of the present invention is good, is a kind of excellent construction material.
The present invention improves the value of red mud slag using discarded red mud slag production mineral fiber tilesn.
The present invention has carried out further slagging-off, therefore obtained mineral fibres to primary mineral fibre obtained in throwing device
The density of plate is less, its better heat preservation.
Additionally, red mud slag wide material sources, with low cost, and heat accumulating type melting furnace fuel consumption is few, energy saving, therefore
The low production cost of obtained mineral fiber tilesn of the invention.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and and
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need to be exhaustive to all of embodiment.And thus drawn
Obvious change that Shen goes out or among changing still in protection scope of the present invention.
Claims (10)
1. the system that a kind of utilization red mud slag produces mineral fiber tilesn, it is characterised in that the system includes：
First atomizer mill, exports with red mud slag entrance and red mud powder；
Magnetic separator, with red mud powder entrance and except the outlet of iron red mud powder, the red mud powder entrance is red with first atomizer mill
The outlet of mud powder is connected；
Second atomizer mill, exports with additive entrance and powder additive；
Mixer, with except iron red mud powder entrance, powder additive entrance and mixture outlet, it is described except iron red mud powder entrance with
The magnetic separator is connected except the outlet of iron red mud powder, and the outlet of the powder additive entrance and the powder additive is connected；
Heat accumulating type melting furnace, exports with mixture inlet and liquid slag, the mixing of the mixture inlet and the mixer
Thing outlet is connected；
Wire producing machine, with liquid slag entrance and primary mineral fibre outlet, the liquid slag entrance and the heat accumulating type melting furnace
Liquid slag outlet be connected；
Slag remover, with primary mineral fibre entrance and slagging-off mineral fibres outlet, the primary mineral fibre entrance with it is described
The primary mineral fibre outlet of wire producing machine is connected；
Drying machine, with slagging-off mineral fibres entrance and finished product mineral fibres outlet, it is described slagging-off mineral fibres entrance with it is described
The slagging-off mineral fibres outlet of slag remover is connected；
Press, with finished product mineral fibres entrance, glue entrance and primary mineral fibre plate exit, the finished product mineral fibres
Entrance is connected with the finished product mineral fibres outlet of the drying machine；
Curing oven, with primary mineral fibre plate entrance and mineral fibres plate exit, the primary mineral fibre plate entrance and institute
The primary mineral fibre plate exit for stating press is connected.
2. system according to claim 1, it is characterised in that the heat accumulating type melting furnace includes melting furnace and regenerative furnace；
The mixture inlet and liquid slag outlet are arranged in the melting furnace, and the melting furnace is additionally provided with heat smoke and goes out
Mouth, pre-heating fuel gas entrance, preheated-combustion-supporting wind entrance；
The regenerative furnace is provided with fuel gas entrance, combustion air entrance, heat smoke entrance, the outlet of pre-heating fuel gas, preheated-combustion-supporting wind
Outlet and exhanst gas outlet, the heat smoke entrance is connected with the heat smoke outlet of the melting furnace, the pre-heating fuel gas outlet
It is connected with the pre-heating fuel gas entrance of the melting furnace, the preheated-combustion-supporting wind outlet enters with the preheated-combustion-supporting wind of the melting furnace
Mouth is connected.
3. a kind of usage right requires the method that the system described in 1 or 2 produces mineral fiber tilesn using red mud slag, and its feature exists
In the method comprising the steps of：
Prepare red mud slag and additive, the additive includes in flyash, quick lime, carbide slag, river sand and cullet
Plant or several；
The red mud slag and the additive are carried out into respectively fine grinding, red mud powder and powder additive is obtained；
The red mud powder is carried out into magnetic separation, the iron in red mud powder is removed；
The powder additive is added toward the red mud powder except iron and be well mixed, be then fed into being melted in the heat accumulating type melting furnace
Melt, and be incubated, obtain the homogeneous liquid slag of internal component；
The liquid slag is sent into throwing in the wire producing machine, primary mineral fibre is obtained；
The primary mineral fibre is removed the gred and is dried, finished product mineral fibres is obtained；
It is described that finished product mineral fibres is suppressed with solidified glue and solidified, obtain mineral fiber tilesn.
4. method according to claim 3, it is characterised in that the mass ratio of the red mud slag and the additive is 10:
1-5:4。
5. method according to claim 4, it is characterised in that the mass ratio of the red mud slag and the additive is 10:
3-2:1。
6. method according to claim 3, it is characterised in that the part of particle diameter≤50 μm in the red mud powder >=
90wt%.
7. method according to claim 6, it is characterised in that particle diameter≤50 μm of the powder additive.
8. method according to claim 3, it is characterised in that the heating-up temperature of the heat accumulating type melting furnace is 1200-
1400℃。
9. method according to claim 3, it is characterised in that the mixed powder is protected after melting in heat accumulating type melting furnace
The time of temperature is 15-25min.
10. method according to claim 3, it is characterised in that the fibre length of the mineral fiber tilesn is 1-100mm,
Average fibre diameter is 4.6-5.2 μm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483723A (en) * | 2018-12-26 | 2019-03-19 | 南京工程学院 | A kind of intelligent positioning fiber system for reinforcing steel fiber reinforced concrete suitable for FRP |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483723A (en) * | 2018-12-26 | 2019-03-19 | 南京工程学院 | A kind of intelligent positioning fiber system for reinforcing steel fiber reinforced concrete suitable for FRP |
| CN109483723B (en) * | 2018-12-26 | 2024-05-03 | 南京工程学院 | Intelligent directional fiber system suitable for FRP reinforced steel fiber concrete |
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