CN103265265B - Preparation methods of silicalite and industrial puffed silicalite - Google Patents
Preparation methods of silicalite and industrial puffed silicalite Download PDFInfo
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- CN103265265B CN103265265B CN201310146502.0A CN201310146502A CN103265265B CN 103265265 B CN103265265 B CN 103265265B CN 201310146502 A CN201310146502 A CN 201310146502A CN 103265265 B CN103265265 B CN 103265265B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention discloses a preparation method of silicalite. Through utilization of the large specific gravity characteristic of silicalite, silicalite is separated from coal gangue by flotation and magnetic separation so that the existing coal gangue slag can be treated and silicalite having social and economic benefits is obtained. The invention also discloses a preparation method of industrial puffed silicalite. The preparation method comprises the following steps of A, silicalite preparation, B, grinding, C, blending, D, blank preparation, E, drying, F, sintering, and G, cooling. The preparation method of the industrial puffed silicalite realizes the combination of silicalite preparation and industrial puffed silicalite preparation, has environmental protection effects, and can greatly reduce a production cost. The industrial puffed silicalite has good hardness and fire resistance, stable physical and chemical properties, satisfies the architectural material industry standard (JC/T945-2005) requirements, and can be widely used for building brickwork, building floors and wall decoration.
Description
Technical field
The invention belongs to Litter and utilize technical field, relate to coal gangue recovery and reuse of waste, be specifically related to a kind ofly utilize coal gangue to prepare silicite and utilize silicite to prepare the method for silicite puff.
Background technology
Coal gangue is the solid waste discharged in coal mining process and coal washing process, it is a kind of black gray expandable rock lower, harder than coal with a kind of carbon content of coal seam association in coalification course, comprise choose in the spoil and coal washing process guessd out from top board, base plate and interlayer in the digging gangue in tunnelling process, mining process wash spoil, its main component is Al
2o
3, SiO
2, also contain the Fe do not waited in addition
2o
3, CaO, MgO, Na
2o, K
2o, P
2o
5, SO
3with micro-rare elements (gallium, vanadium, titanium, cobalt).
Now, coal gangue has become the solid, liquid, gas three disasters various " industrial waste ", and its long-term stacking not only wastes resource, accounts for and has pressed a large amount of soils, and pollutes water source, soil and ambient air; Ecotope and resident's security of the lives and property in mining area are had a strong impact on.
The main component of coal gangue is Silicified breccias, and the part that wherein silicon content is higher is called silicon system coal gangue, is also called silicite; The part that aluminum content is higher is called aluminium system coal gangue.In the proportion of water for 1, the proportion of silicon system coal gangue is about 3.6, and the proportion of aluminium system coal gangue is about 2.6.And containing some silicite in coal gangue, ratio accounts for 30% of coal gangue gross weight.Silicite, are namely the rock of main component with silicon-dioxide in sedimentogeneous rock, also become silexite; Its main chemical compositions is SiO
2(> 70%) and H
2o, other oxide compound has Fe
2o
3(≤10%), Al
2o
3(≤8%), MgO, CaO etc.; Its mineralogical composition is spontaneous quartz, calcedony and opal.Silicite have a variety of industrial use.As flint is large with its hardness, can be used as grinding raw material and siliceous refractory [material; Jasper is also beautiful as fine workmanship's building stones using hard and compact and color and luster.Diatomite all has been widely used in the multiple parts such as daily-use chemical industry, sugar-refining industry and water purification industry because it has strong adsorptivity.
How being used by waste coal gangue mediasilicic rock, while minimizing environmental pollution, creating higher social value and economic worth is one of direction of studying, this area.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of silicite, from coal gangue, extract silicite.
Another object of the present invention is the preparation method providing a kind of silicite industry puff, the silicite in coal gangue are particularly utilized to prepare the method for silicite industry puff, coal gangue waste is used, reach the object of environmental protection, produce the silicite industry puff with social value and economic benefit simultaneously.
For achieving the above object, the technical solution used in the present invention is: the preparation method providing a kind of silicite, is characterized in that, comprises the following steps:
I, preparation dense medium solution, magnetite powder and water are mixed according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3;
Ii, pulverizes, coal gangue is broken into the particle of 1 ~ 10mm;
Iii, flotation, pours into the coal gangue after pulverizing in dense medium solution, and is joined in flotation machine by both mixed materials and enter flotation; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours;
Vi, magnetic separation, the compounding substances of above-mentioned silicite and dense medium solution after drying, then obtains silicite through magnetic separator.
SiO in the silicite obtained in described step vi
2weight percent be 75% ~ 80%.
Fe in the silicite obtained in described step vi
3o
4weight percent be 4% ~ 8%.
A preparation method for silicite industry puff, comprises the following steps:
A, prepare silicite, comprise step by step following:
A1, preparation dense medium solution, magnetite powder and water are mixed according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3;
A2, pulverizes, coal gangue is broken into the particle of 1 ~ 10mm;
A3, flotation, pours into the coal gangue after pulverizing in dense medium solution, and is joined in flotation machine by both mixed materials and enter flotation; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours;
A4, magnetic separation, the compounding substances of above-mentioned silicite and dense medium solution after drying, then obtains silicite through magnetic separator;
B, grinding, first add the tensio-active agent of silicite weight 0.7 ~ 1.0%, and send into wet-type ball mill together with the jet powder of silicite weight 15% ~ 20% in above-mentioned silicite, and mixing is milled into 150 ~ 200 order slurries;
C, batching, add the clay of slurry weight 30% ~ 50%, the raising agent of slurry weight 1% ~ 5%, the whipping agent of slurry weight 1% ~ 2%, the molding adhesive of slurry weight 4% ~ 6% and auxiliary material, enter step C after stirring in the slurry that step B obtains;
D, base, carry out base with shaping equipment to the material that step C stirs;
E, drying, the blank that step D is obtained dries for subsequent use in physical environment;
F, to burn till, dried for step e blank is delivered to stove and burns till; Firing temperature is 800 ~ 1000 DEG C, and firing time is no less than 0.5h;
G, cooling, the blank that step F is fired into carries out gradual cooling down in the cooling zone of tunnel furnace, obtains silicite industry puff; Kiln discharge temperature controls below 80 DEG C.
Described tensio-active agent is stearic acid or Phenylsulfonic acid.Described auxiliary material is the bauxitic clay of slurry weight 8% ~ 10% or the aluminium ore slag of slurry weight 10% ~ 15%.Described raising agent is wood shavings or vegetable fibre; Described whipping agent is hydrogen peroxide; Described molding adhesive is water glass or lignosulfite.
In described step e, blank is dried in physical environment weight in wet base per-cent to blank and be less than 5%.
Described shaping equipment is hydrodynamic mo(u)lding press.Described stove is tunnel furnace.
Adopt the preparation method of silicite provided by the invention, utilize the feature that silicite proportion is larger, separated from coal gangue by the mode of flotation and magnetic separation, thus existing coal gangue slag processed, obtained have Social benefit and economic benefit silicite; Coal gangue slag is recycled, solves environmental issue, and there is environment-friendly high-efficiency, speed is fast, energy consumption is low, effective remarkable advantage; In addition, the method also has the advantage that investment is little, technique simple, be convenient to control grasp, is convenient to the exploitation of the coal gangue slag of manufacturing enterprise.
Adopt the preparation method of silicite provided by the invention industry puff, the preparation of the preparation of silicite and silicite industry puff is combined, has both served the effect of environmental protection, greatly can reduce production cost again; And due to SiO in silicite
2content higher, greatly reduce the firing temperature of silicite industry puff, and the silicite industry puff of producing has good hardness and resistivity against fire, and physics and stable chemical performance, reach the requirement of building material industry standard (JC/T 945-2005), constructing, building ground, wall decoration etc. can be widely used in.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail, but they are not to further restriction of the present invention.
A preparation method for silicite, is characterized in that, comprises the following steps:
I, preparation dense medium solution, magnetite powder and water are mixed according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3;
Ii, pulverizes, coal gangue is broken into the particle of 1 ~ 10mm;
Iii, flotation, pours into the coal gangue after pulverizing in dense medium solution, and is joined in flotation machine by both mixed materials and enter flotation; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours;
Vi, magnetic separation, the compounding substances of above-mentioned silicite and dense medium solution after drying, then obtains silicite through magnetic separator.
SiO in the silicite obtained in step vi
2weight percent be 75% ~ 80%.Fe in the silicite obtained in step vi
3o
4weight percent be 4% ~ 8%.
A preparation method for silicite industry puff, comprises the following steps:
A, prepare silicite, comprise step by step following:
A1, preparation dense medium solution, by magnetite powder, (chemical formula is Fe
3o
4) and water mix according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3;
A2, pulverizes, coal gangue is broken into the particle of 1 ~ 10mm;
A3, flotation, pours in dense medium solution by the coal gangue after pulverizing, and both mixed materials are joined in flotation machine enter flotation, because the proportion of silicite is greater than 3, sink to bottom dense medium solution, and the proportion of aluminium system coal gangue is less than 3, float on dense medium solution surface; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours;
A4, magnetic separation, the compounding substances of above-mentioned silicite and dense medium solution (together with silicite isolated dense medium solution) after drying, then obtains silicite through magnetic separator; SiO in above-mentioned silicite
2weight percent be 75% ~ 80%, Fe
3o
4weight percent be 4% ~ 8%; The magnetite powder that magnetic separation obtains is reused for preparation dense medium solution;
B, grinding, first add the tensio-active agent of silicite weight 0.7 ~ 1.0%, and send into wet-type ball mill together with the jet powder of silicite weight 15% ~ 20% in above-mentioned silicite, and mixing is milled into 150 ~ 200 order slurries;
C, batching, add the clay of slurry weight 30% ~ 50%, the raising agent of slurry weight 1% ~ 5%, the whipping agent of slurry weight 1% ~ 2%, the molding adhesive of slurry weight 4% ~ 6% and auxiliary material, enter step C after stirring in the slurry that step B obtains;
D, base, carry out base with shaping equipment to the material that step C stirs;
E, drying, the blank that step D is obtained dries for subsequent use in physical environment; Blank is dried in physical environment weight in wet base per-cent to blank and be less than 5%.
F, to burn till, dried for step e blank is delivered to stove and burns till; Firing temperature is 800 ~ 1000 DEG C, and firing time is no less than 0.5h; Preferred firing time is 0.5 ~ 4 hour.
G, cooling, the blank that step F is fired into carries out gradual cooling down in the cooling zone of tunnel furnace, obtains silicite industry puff; Kiln discharge temperature controls below 80 DEG C.
Tensio-active agent is stearic acid or Phenylsulfonic acid.Auxiliary material is the bauxitic clay of slurry weight 8% ~ 10% or the aluminium ore slag of slurry weight 10% ~ 15%.Raising agent is wood shavings or vegetable fibre; Described whipping agent is hydrogen peroxide; Described molding adhesive is water glass or lignosulfite.
Shaping equipment is hydrodynamic mo(u)lding press.Stove is tunnel furnace.
embodiment 1:
1, prepare silicite, magnetite powder and water are mixed according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3; Coal gangue is broken into the particle of 1 ~ 10mm; Coal gangue after pulverizing is poured in dense medium solution, and both mixed materials are joined in flotation machine enters flotation; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours; The compounding substances of above-mentioned silicite and dense medium solution after drying, then obtains silicite through magnetic separator; SiO in above-mentioned silicite
2weight percent be 75%, Fe
3o
4weight percent be 4%, Al
2o
3the weight percent of weight percent to be the weight percent of 8%, MgO be 6%, CaO be 7%;
2, mill, in coal gangue, add the stearic acid of coal gangue weight 0.7%, increase runner milling calcining effect with the reunion reducing material; Then deliver to wet-type ball mill to mix with the jet powder of coal gangue weight 15% and wear into 150 ~ 200 object slurries;
3, prepare burden, in the slurry obtained by step 2, add clay, the vegetable fibre of slurry weight 3%, the hydrogen peroxide of slurry weight 1%, the lignosulfite of slurry weight 6%, the bauxitic clay of slurry weight 10% of slurry weight 45%;
4, base, adopts hydrodynamic mo(u)lding press will to be rolled into the adobe of 600mm × 240mm × 12mm after express material obtained for step 3;
5, dry, the adobe that step 4 is obtained is carried out nature and dry weight in wet base per-cent to adobe and be less than 5%;
6, burn till, adobe step 5 drying obtained drops in tunnel furnace, and burn till, firing temperature is 800 DEG C, and firing time is 4h;
7, cool, the adobe that step 6 is burnt till carries out gradual cooling down in the cooling zone of tunnel furnace, and kiln discharge temperature controls below 80 DEG C.
The unit weight of silicite industry puff prepared by the method adopting the present embodiment to provide is 430 ~ 480Kg/m
3, loose volume weight is about 3520Kg/m
3, water-intake rate is 11.7% ~ 12.0%, cylindrical compress strength is about 2.201Mpa, water ratio is about 1%, physical strength is about 7.23Mpa, hollow rate is about 48%.
embodiment 2:
1, prepare silicite, magnetite powder and water are mixed according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3; Coal gangue is broken into the particle of 1 ~ 10mm; Coal gangue after pulverizing is poured in dense medium solution, and both mixed materials are joined in flotation machine enters flotation; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours; The compounding substances of above-mentioned silicite and dense medium solution after drying, then obtains silicite through magnetic separator; SiO in above-mentioned silicite
2weight percent be 78%, Fe
3o
4weight percent be 6%, Al
2o
3the weight percent of weight percent to be the weight percent of 6%, MgO be 4%, CaO be 6%;
2, mill, in coal gangue, add the Phenylsulfonic acid of coal gangue weight 0.7%, increase runner milling calcining effect with the reunion reducing material; Then deliver to wet-type ball mill to mix with the jet powder of coal gangue weight 20% and wear into 150 ~ 200 object slurries;
3, prepare burden, in the slurry obtained by step 2, add clay, the wood shavings of slurry weight 5%, the hydrogen peroxide of slurry weight 2%, the water glass of slurry weight 4%, the aluminium ore slag of slurry weight 10% of slurry weight 50%;
4, base, adopts hydrodynamic mo(u)lding press will to be rolled into the adobe of 600mm × 240mm × 12mm after express material obtained for step 3;
5, dry, the adobe that step 4 is obtained is carried out nature and dry weight in wet base per-cent to adobe and be less than 5%;
6, burn till, adobe step 5 drying obtained drops in tunnel furnace, and burn till, firing temperature is 850 DEG C, and firing time is 1.5h;
7, cool, the adobe that step 6 is burnt till carries out gradual cooling down in the cooling zone of tunnel furnace, and kiln discharge temperature controls below 80 DEG C.
The unit weight of silicite industry puff prepared by the method adopting the present embodiment to provide is 820 ~ 870Kg/m
3, loose volume weight is about 5312Kg/m
3, water-intake rate is 15.6% ~ 17.0%, cylindrical compress strength is about 4.1Mpa, water ratio is about 0.2%, physical strength is about 8.5Mpa, hollow rate is about 45%.
embodiment 3:
1, prepare silicite, magnetite powder and water are mixed according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3; Coal gangue is broken into the particle of 1 ~ 10mm; Coal gangue after pulverizing is poured in dense medium solution, and both mixed materials are joined in flotation machine enters flotation; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours; The compounding substances of above-mentioned silicite and dense medium solution after drying, then obtains silicite through magnetic separator; SiO in above-mentioned silicite
2weight percent be 80%, Fe
3o
4weight percent be 8%, Al
2o
3the weight percent of weight percent to be the weight percent of 4%, MgO be 3%, CaO be 5%;
2, mill, in coal gangue, add the stearic acid of coal gangue weight 1.0%, increase runner milling calcining effect with the reunion reducing material; Then deliver to wet-type ball mill to mix with the jet powder of coal gangue weight 17% and wear into 150 ~ 200 object slurries;
3, prepare burden, in the slurry obtained by step 2, add clay, the wood shavings of slurry weight 3%, the hydrogen peroxide of slurry weight 1%, the water glass of slurry weight 5%, the aluminium ore slag of slurry weight 15% of slurry weight 30%;
4, base, adopts hydrodynamic mo(u)lding press will to be rolled into the adobe of 600mm × 240mm × 12mm after express material obtained for step 3;
5, dry, the adobe that step 4 is obtained is carried out nature and dry weight in wet base per-cent to adobe and be less than 5%;
6, burn till, adobe step 5 drying obtained drops in tunnel furnace, and burn till, firing temperature is 1000 DEG C, and firing time is 0.5h;
7, cool, the adobe that step 6 is burnt till carries out gradual cooling down in the cooling zone of tunnel furnace, and kiln discharge temperature controls below 80 DEG C.
The unit weight of silicite industry puff prepared by the method adopting the present embodiment to provide is 621.3 ~ 645.7Kg/m
3, loose volume weight is about 4520Kg/m
3, water-intake rate is 12.6% ~ 13.8%, cylindrical compress strength is about 3.8Mpa, water ratio is about 3%, physical strength is about 5.6Mpa, hollow rate is about 43%.
The silicite industry puff adopting the method for embodiment 1 to embodiment 3 to obtain is due to containing more SiO
2, there is good hardness and resistivity against fire, and its physical properties and stable chemical nature, reach the requirement of building material industry standard (JC/T 945-2005), constructing, building ground, wall decoration etc. can be widely used in.
Claims (1)
1. a preparation method for silicite, is characterized in that, comprises the following steps:
I, preparation dense medium solution, magnetite powder and water are mixed according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3;
Ii, pulverizes, coal gangue is broken into the particle of 1 ~ 10mm;
Iii, flotation, pours into the coal gangue after pulverizing in dense medium solution, and is joined in flotation machine by both mixed materials and enter flotation; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours;
Vi, magnetic separation, the compounding substances of above-mentioned silicite and dense medium solution after drying, then obtains silicite through magnetic separator;
SiO in the silicite obtained in described step vi
2weight percent be 75% ~ 80%;
Fe in the silicite obtained in described step vi
3o
4weight percent be 4% ~ 8%.
2
.a preparation method for silicite industry puff, is characterized in that, comprise the following steps:
A, prepare silicite, comprise step by step following:
A1, preparation dense medium solution, magnetite powder and water are mixed according to the ratio of weight ratio 1:2, obtained proportion is the dense medium solution of 3;
A2, pulverizes, coal gangue is broken into the particle of 1 ~ 10mm;
A3, flotation, pours into the coal gangue after pulverizing in dense medium solution, and is joined in flotation machine by both mixed materials and enter flotation; From flotation machine bottom part from the compounding substances obtaining silicite and dense medium solution after 2 hours;
A4, magnetic separation, the compounding substances of above-mentioned silicite and dense medium solution after drying, then obtains silicite through magnetic separator;
B, grinding, first add the tensio-active agent of silicite weight 0.7 ~ 1.0%, and send into wet-type ball mill together with the jet powder of silicite weight 15% ~ 20% in above-mentioned silicite, and mixing is milled into 150 ~ 200 order slurries;
C, batching, add the clay of slurry weight 30% ~ 50%, the raising agent of slurry weight 1% ~ 5%, the whipping agent of slurry weight 1% ~ 2%, the molding adhesive of slurry weight 4% ~ 6% and auxiliary material, enter step C after stirring in the slurry that step B obtains;
D, base, carry out base with shaping equipment to the material that step C stirs;
E, drying, the blank that step D is obtained dries for subsequent use in physical environment;
F, to burn till, dried for step e blank is delivered to stove and burns till; Firing temperature is 800 ~ 1000 DEG C, and firing time is no less than 0.5h;
G, cooling, the blank that step F is fired into carries out gradual cooling down in the cooling zone of tunnel furnace, obtains silicite industry puff; Kiln discharge temperature controls below 80 DEG C.
3
.the preparation method of silicite industry puff according to claim 2, is characterized in that: described tensio-active agent is stearic acid or Phenylsulfonic acid.
4
.the preparation method of silicite industry puff according to claim 2, is characterized in that: described auxiliary material is the bauxitic clay of slurry weight 8% ~ 10% or the aluminium ore slag of slurry weight 10% ~ 15%.
5
.the preparation method of silicite industry puff according to claim 2, is characterized in that: described raising agent is wood shavings or vegetable fibre; Described whipping agent is hydrogen peroxide; Described molding adhesive is water glass or lignosulfite.
6
.the preparation method of silicite industry puff according to claim 2, is characterized in that: described shaping equipment is hydrodynamic mo(u)lding press.
7
.the preparation method of silicite industry puff according to claim 2, is characterized in that: in described step e, blank is dried in physical environment weight in wet base per-cent to blank and be less than 5%.
8
.the preparation method of silicite industry puff according to claim 2, is characterized in that: described stove is tunnel furnace.
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|---|---|---|---|
| CN201310146502.0A CN103265265B (en) | 2013-04-25 | 2013-04-25 | Preparation methods of silicalite and industrial puffed silicalite |
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|---|---|---|---|
| CN201310146502.0A CN103265265B (en) | 2013-04-25 | 2013-04-25 | Preparation methods of silicalite and industrial puffed silicalite |
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| CN101333102B (en) * | 2008-07-31 | 2011-05-04 | 段连文 | Sintered porous brick from skarn type magnetite tailings and method for preparing same |
| CN102491730B (en) * | 2011-11-25 | 2013-07-17 | 四川海吉尔环保科技开发有限公司 | Method for preparing artificial vesuvianite building block from Bayer red mud |
| CN102491732B (en) * | 2011-12-14 | 2013-04-24 | 四川海吉尔环保科技开发有限公司 | Method for producing artificial vesuvianite block by using coal gangue as raw material |
| CN202744461U (en) * | 2012-07-13 | 2013-02-20 | 张成双 | Harmless brickmaking system of household garbage |
| CN102795882B (en) * | 2012-08-24 | 2015-03-11 | 贵州绿水青山环保科技有限公司 | Pit backfill casting stone made from fly ash, steel slag and coal gangue |
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