CN107673738A - A kind of iron ore tailings haydite and preparation method - Google Patents
A kind of iron ore tailings haydite and preparation method Download PDFInfo
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- CN107673738A CN107673738A CN201710981852.7A CN201710981852A CN107673738A CN 107673738 A CN107673738 A CN 107673738A CN 201710981852 A CN201710981852 A CN 201710981852A CN 107673738 A CN107673738 A CN 107673738A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
A kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tailings：75~90%, granularity≤0.074mm kaolin：3~15 %, fabric and raw-vermiculite powder or perlite：0.5~3%, active lime minus mesh：0.5~5%；Preparation method：1）First all materials are well mixed；Material, which is inserted in pelletising drum or disc balling machine, manufactures green-ball；Dry；Preheating；Roasting；Room temperature is naturally cooled to, it is standby.The present invention can utilize iron ore tailings resource to greatest extent, using 5,000,000 tons of pelletizing producing lines, the production ceramic product of large-scale low-cost, increase the economic benefit of ceramsite material.The bulk density of haydite is in 650~1030kg/m3, 5~9.2MPa of cylindrical compress strength, fully meet the market demand.
Description
Technical field
The present invention relates to a kind of technical field of inorganic material, specific design is a kind of to be prepared using iron ore tailings and discarded object
Haydite and method.It is applied to make construction material, insulation material, plantation carrier material.
Background technology
It is one of Critical policies of enterprise, country to reduce production cost, is one of important measures that competitiveness improves in enterprise,
Especially iron and steel enterprise is even more important.
Before making the present invention, pelletizing dosage 20% in blast furnace burden, with the limited production of steel, the dosage of ironmaking pelletizing will
It can decrease, about to 8-10%.For the pelletizing production ability of Wuhan Iron and Steel Plant Ezhou, it is 5,000,000 tons of production capacities, because limited production may
It is more than needed to there is ten thousand tons or so of 200-300.And 5,000,000 tons of Ezhou rotary kiln cost declining pressure also increases, pelletizing sale at full capacity is deposited
In difficulty, underload cost has pressure.All it is ten thousand tons of scales of 10-50 though rotary kiln production haydite has history, cost is high；
The more than one hundred million tons of iron ore tailings stock, mine tailing accumulation turns into a huge mud lake, the wasting of resources, and has Hidden hazrads.
How using the production of iron tailings raw material to adapt to building and the ceramic product that uses of insulation material, can both become give up into
Treasured, it is comprehensively utilized, the pollution to environment can be reduced again, is a difficulty of the pendulum in face of those skilled in the art of the present technique
Topic.People pass through substantial amounts of experimental study, propose the haydite for adapting to building using the production of iron tailings raw material and insulation material uses
Product, although some solutions of problem, are analyzed, prepared ceramic product is used in construction material, thermal insulating material with practical conditions
In terms of material, it there is also some problems, the following document such as through retrieval：
China Patent No. is CN201310620026.1 document, and it discloses one kind《Low-silica iron ore tailings expanded ceramsite and its system
Preparation Method》, its raw material composition：50~60 parts of iron tailings powders, 37~47 parts of clays or kaolin or bentonite, 0~3 part of coal.Iron
Silica is less than 40% in mine tailing, can produce 5~25mm haydite.In 105~130 DEG C of dry 2-4h of preheating temperature, 600
~900 DEG C preheat 10~15min, are calcined 10~15min at 1050~1150 DEG C of sintering temperature, can burn out bulk density
650kg/m3, cylindrical compress strength 5.43MPa, water absorption rate be 8.75% ceramic product.As building light-weight aggregate, insulation
Heat-barrier material uses.The invention iron tailings dosage is few, and clay is big with bentonite consumption, low intensity during pelletizing, easy green-ball efflorescence,
And although the addition of coal dust can increase stomata, the cracking of haydite is added.
China Patent No. is CN200910012729.X document, and it discloses one kind《Utilize high silicon particulate iron tailings system
Haydite of work and preparation method thereof》, it is characterised in that haydite raw material composition for 55~60 parts of particulate iron tailings, flyash 10~
25 parts, 5~10 parts of gangue, 10~20 parts of red mud.Different material is mixed, cured, be homogenized after be granulated with twin rollers, 1150
50~60min is calcined at~1200 DEG C, bulk density 698kg/m can be burnt out3, cylindrical compress strength 3.3MPa, water absorption rate 9%
Ceramic product.Flyash that the invention uses, gangue are all poor materials, and viscosity is poor；Utilize red mud, its alkali metal content
Greatly, sodium content is very high, and sulfuric acid is typically used in iron tailings flotation, and material is acid, and both react, and solidification is fast, and reaction is big, and pelletizing is stranded
Difficulty, the easy efflorescence of green-ball, 50~60min of roasting is easily bonded fusing at 1150~1200 DEG C.
China Patent No. is CN201510277931.0's《A kind of side that Superlight ceramsites are made using clay iron-containing tailing
Method》, it is characterised in that haydite raw material composition for clay iron-containing tailing 40~48%, Coaseries kaolin or gangue 40~
48%th, dewatered sludge 8~15%.Its preparation technology flow is batch mixing, and --- pelletizing --- is dried and --- it is cold to preheat --- roasting ---
But.In 500~600 DEG C of preheating temperature, 1250~1350 DEG C of sintering temperature, 10~15 DEG C/min of programming rate process conditions
Under, bulk density 390kg/m can be burnt out3, cylindrical compress strength 1.2MPa, water absorption rate be 3.8% Superlight ceramsites product.The hair
Bright big using Coaseries kaolin or gangue amount, pelletizing is difficult, the easy dusting of dewatered sludge, and viscosity is poor, in acid after iron tailings flotation
Property, does not solidify easy etching apparatus, then cylindrical compress strength is low, and bulk density is relatively large.
China Patent No. is CN200910144295.9 document, is disclosed《A kind of iron ore tailing ceramsite and its preparation side
Method》, it is characterised in that the raw material composition of haydite is adopting iron ore tailings 60~70%, clay 25~40%, stalk powder 1~3%.It is made
Standby technique includes batch mixing, granulation, drying, roasting, cooling.In 100~110 DEG C of dry 6-8h of preheating temperature, sintering temperature 1120
6~8min is calcined at~1200 DEG C, bulk density 490-702kg/m can be burnt out3Ceramic product.The invention is due to using
Powder of straw, its easy water swelling, low intensity when making pelletizing, the easy efflorescence of green-ball, haydite is caused to ftracture.
China Patent No. is CN201610019831.2's《A kind of desulfurated plaster and iron tailings haydite and preparation method thereof》,
It is characterized in that the raw material composition of haydite is 50~60 parts of iron tailings, 10~20 parts of desulfurated plaster, 20~30 parts of flyash, coal dust
0~6 part.Its preparation technology includes batch mixing, granulation, drying, roasting, cooling.In 100~120 DEG C of dry 4-6h of preheating temperature,
260~500 DEG C preheat 8-15min, are calcined 25~35min at 1080~1200 DEG C of sintering temperature, can burn out bulk density
700-900kg/m3, cylindrical compress strength 4-6MPa, water absorption rate be 5-10% ceramic product.The invention is big using fine coal ash quantity, coal
Powder burning is easy to produce gas, and pelletizing is difficult, and desulfurated plaster is acid big, easily produces sulfuric acid mist, is in acidity after iron tailings flotation,
Easy etching apparatus is not solidified.
China Patent No. is CN201310109225.6 document, and it discloses one kind《The branch prepared using industrial tailings
Support agent and preparation method thereof》, it is characterised in that the raw material composition of haydite includes magnesium ore deposit mine tailing, iron ore mine and mild-clay, or
Person contains silica.Wherein iron ore mine 20~60%, magnesium ore deposit mine tailing 20~60%, mild-clay 5~20%.Its preparation technology includes
Batch mixing, granulation, drying, roasting, cooling.1.5~2.5h is calcined at 1210~1280 DEG C of firing temperature, accumulation can be burnt out
Density 1.54g/m3Proppant ceramic product.The invention is big using mine tailing amount, clay pelletizing low intensity, firing time length, into
Ball technique can be complicated, and cost is high, yields poorly.
China Patent No. is CN201410417298.6 document, it discloses《A kind of manufacture method of colored haydite》,
It is characterized in that haydite composition include golden mine tailing 50~65%, yellow river silt 20~30%, coal dust 3~4%, cobalt oxide 0 or 3~5%,
Manganese oxide 0 or 4~6%, water 25~30%.8~12mm haydite ball is made.The invention can use for reference to be made for colored haydite,
But its water consumption is excessive, it is unsuitable for big industrialized production, and product size stability can not ensure.
China Patent No. is CN201510273757.2 document, is disclosed《A kind of light high-strength haydite and its preparation work
Skill》, it is characterised in that haydite composition includes 20~40 parts of 5~15 parts of Kaolin Tailings, 55~65 parts of gangue, flyash mixing
Based on expect, the ratio mixed pelletizing of 1.5~3 parts of pore formers is added according still further to 100 parts of basestocks；Pore former is rice husk, carbonic acid
Salt, high-calcium fly ass etc..10~20min is calcined at 1050 DEG C of firing temperature, ceramic product can be burnt out.The invention is mainly
Ridge material, without viscosity, balling-up is poor, if with the big industrialized production of rotary kiln, is difficult to ensure that green ball strength, ceramic product matter
Amount is difficult to ensure that.
China Patent No. is CN201510279164.7 document, it discloses《One kind is all using solid waste as raw material
The Superlight ceramsites of preparation》, it is characterised in that haydite raw material composition for clay iron-containing tailing 40~45%, gangue 42~
49%th, dewatered sludge 10~13%.Its preparation technology flow is batch mixing, and --- pelletizing --- dries --- preheating --- roasting ---
Cooling.In 500~600 DEG C of preheating temperature, 1250~1350 DEG C of sintering temperature, 10~15 DEG C/min of programming rate process conditions
Under, bulk density 390kg/m can be burnt out3, cylindrical compress strength 1.2MPa, water absorption rate be 3.8% Superlight ceramsites product.The hair
Bright big using gangue amount, pelletizing is difficult, the easy dusting of dewatered sludge, and viscosity is poor, in acidity after iron tailings flotation, does not solidify easily
Etching apparatus.
China Patent No. is CN201610050662.9 document, it discloses《It is a kind of as microorganism ceramic grain filter
Iron tailings porous material and its preparation method and application》, wherein haydite raw material composition in containing 65~85% iron tailings powders, 6~
19% clay, pore creating material 4~12%, calcium carbonate 1~6%.1~2h is calcined at 800~1000 DEG C of sintering temperature, sky can be burnt out
Gap rate is more than the how empty material that 40%, crushing force is not less than 0.8KN.But silica contains in the iron ore tailings of invention requirement
Amount 60~75%, TFe8~14%, this mine tailing in fact hardly results in because the general silica of the mine tailing after ore dressing 30~
45% is in the majority, and the invention is difficult to industrialness implementation, and firing time is oversize.
China Patent No. is CN201210125921.1 document, and it discloses one kind《Lean hematite mine tailing concrete light
Building block brick and its preparation method and application》, it contains 35~45% lean hematite mine tailings, 15~25% flyash, pottery in forming
Grain 10~20%, portland cement 20~30%.It is prefabricated to be used as building block as construction material.
Found from above-mentioned literature search result, be not adapted to large-scale pelletizing rotary kiln production haydite Patents, with
Meet big industry, produce the ceramic product of building heat preservation and urban construction needs in enormous quantities.
The content of the invention
The invention reside in overcoming to manufacture haydite with iron ore tailings mine tailing impurity to be present more, containing sulfate radical, coarse size, make
The problems such as ball is difficult, green ball strength is low, there is provided one kind largely utilizes iron ore tailings, and can realize big industrial production, and haydite
Bulk density is in 650~1030kg/m3, 5~9.2MPa of cylindrical compress strength haydite and preparation method.
Realize the measure of above-mentioned purpose：
A kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tail
Ore deposit：75~90%, granularity≤0.074mm kaolin：3~15 %, fabric and raw-vermiculite powder or perlite：0.5~3%, active lime sieve
Blanking：0.5~5%, haydite performance：Bulk density is in 650~1100kg/m3, cylindrical compress strength is in 3~9MPa.
Further：Added with the desulfurated plaster that weight percent content is 0.5~3 %.
Further：Added with the methylcellulose or hydroxymethyl cellulose that weight percent content is 0.01~1 %.
Further：Accounting of the granularity less than 0.088mm is not less than 50% in the iron ore tailings.
Further：The weight percent content of calcium oxide is not less than 80% in the active lime minus mesh.
Prepare a kind of method of iron ore tailings haydite, its step：
1）First all materials are well mixed；
2）Mixed compound is inserted in pelletising drum or disc balling machine, and according to raw material gross weight percentage 6 ~
12% amount extremely soaks shape to water spray on compound；Manufacture green-ball；
3）Made green-ball is dried, drying temperature is controlled at 105~130 DEG C, and drying time is in 10-30min；
4）Preheated, preheating temperature is 600~900 DEG C, and preheating time is 15~30min；
5）It is calcined, sintering temperature is 950~1150 DEG C, and roasting time is 10~25min；
6）Room temperature is naturally cooled to, it is standby.
Preferably：Drying temperature is controlled at 110~125 DEG C.
Preferably：Preheating temperature is 650~860 DEG C.
Preferably：Sintering temperature is 980~1120 DEG C.
The effect of each raw material in the present invention：
Granularity≤0.088mm iron ore tailings：Main haydite materials, play essential mineral phase.
Granularity≤0.074mm kaolin：Main haydite materials, play a part of to be bonded phase.
Fabric and raw-vermiculite powder or perlite：The foaming agent of haydite, pore former.
Active lime minus mesh：The acid ingredient nertralizer of haydite.
Desulfurated plaster：Increase the viscosity of green-ball, utilize discarded object.
Methylcellulose or hydroxymethyl cellulose：Increase the viscosity and intensity of green-ball.
The present invention compared with prior art, can utilize iron ore tailings resource to greatest extent, be produced using 5,000,000 tons of pelletizings
Line, the production ceramic product of large-scale low-cost, increase the economic benefit of ceramsite material.The bulk density of haydite 650~
1030kg/m3, 5~9.2MPa of cylindrical compress strength.
Embodiment
The present invention is described in detail below：
Embodiment 1：
A kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tail
Ore deposit：75%, granularity≤0.074mm kaolin：20%, fabric and raw-vermiculite powder：2.95%, active lime minus mesh：2%, methylcellulose
0.05wt %.In the iron ore tailings, the percentage by weight of powder amount of the granularity less than 0.088mm is 90%；Active lime sieves
The weight percent content of calcium oxide is 95% in blanking.
Preparation method：
1）First all materials are well mixed；
2）Mixed compound is inserted in pelletising drum or disc balling machine, and according to the 6% of raw material gross weight percentage
Amount to water spray on compound to wetting shape；Manufacture green-ball；
3）Made green-ball is dried, drying temperature is controlled at 106 DEG C, and drying time is in 18min；
4）Preheated, preheating temperature is 660~680 DEG C, preheating time 20min；
5）It is calcined, sintering temperature is 952 DEG C, roasting time 15min；
6）Room temperature is naturally cooled to, it is standby.
After testing, prepared haydite, its bulk density are 750kg/m3, cylindrical compress strength 5.2MP；In the trial employment period, not
It was found that and generation haydite cracking phenomena.
Embodiment 2：
A kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tail
Ore deposit：88%, granularity≤0.074mm kaolin：5%, fabric and raw-vermiculite powder：3%, active lime minus mesh：2.9%, desulfurated plaster：
1.1%.In the iron ore tailings, the percentage by weight of powder amount of the granularity less than 0.088mm is 95%；Active lime minus mesh
The weight percent content of middle calcium oxide is 98%.
Preparation method：
1）First all materials are well mixed；
2）Mixed compound is inserted in pelletising drum or disc balling machine, and according to raw material gross weight percentage
8.5% amount extremely soaks shape to water spray on compound；Manufacture green-ball；
3）Made green-ball is dried, drying temperature is controlled at 111 DEG C, and drying time is in 30min；
4）Preheated, preheating temperature is 610~630 DEG C, preheating time 25min；
5）It is calcined, sintering temperature is 965 DEG C, roasting time 25min；
6）Room temperature is naturally cooled to, it is standby.
After testing, prepared haydite, its bulk density are 960kg/m3, cylindrical compress strength 8.3MP；In the trial employment period, not
It was found that and generation haydite cracking phenomena.
Embodiment 3：
A kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tail
Ore deposit：90%, granularity≤0.074mm kaolin：7%, perlite：1.5%, active lime minus mesh：1.5%.The iron ore tail
In ore deposit, the percentage by weight of powder amount of the granularity less than 0.088mm is 96%；The weight hundred of calcium oxide in active lime minus mesh
It is 97% to divide than content.
Preparation method：
1）First all materials are well mixed；
2）Mixed compound is inserted in pelletising drum or disc balling machine, and according to raw material gross weight percentage
9.1% amount extremely soaks shape to water spray on compound；Manufacture green-ball；
3）Made green-ball is dried, drying temperature is controlled at 120 DEG C, and drying time is in 12min；
4）Preheated, preheating temperature is 720~740 DEG C, preheating time 27min；
5）It is calcined, sintering temperature is 1015 DEG C, roasting time 19min；
6）Room temperature is naturally cooled to, it is standby.
After testing, prepared haydite, its bulk density are 815kg/m3, cylindrical compress strength 7.3MP；In the trial employment period, not
It was found that and generation haydite cracking phenomena.
Embodiment 4：
A kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tail
Ore deposit：81.5%, granularity≤0.074mm kaolin：15.5%, fabric and raw-vermiculite powder：2.0%, active lime minus mesh：0.5%, desulfurization stone
Cream 0.5%；In the iron ore tailings, the percentage by weight of powder amount of the granularity less than 0.088mm is 99%；Under active lime sieve
The weight percent content of calcium oxide is 90% in material.
Preparation method：
1）First all materials are well mixed；
2）Mixed compound is inserted in pelletising drum or disc balling machine, and according to raw material gross weight percentage
7.5% amount extremely soaks shape to water spray on compound；Manufacture green-ball；
3）Made green-ball is dried, drying temperature is controlled at 128 DEG C, and drying time is in 22min；
4）Preheated, preheating temperature is 770~790 DEG C, preheating time 23min；
5）It is calcined, sintering temperature is 1050 DEG C, roasting time 22min；
6）Room temperature is naturally cooled to, it is standby.
After testing, prepared haydite, its bulk density are 875kg/m3, cylindrical compress strength 7.9MP；In the trial employment period, not
It was found that and generation haydite cracking phenomena.
Embodiment 5：
A kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tail
Ore deposit：84%, granularity≤0.074mm kaolin：8%, crushed crude pearlite：0.5%, active lime minus mesh：4%, desulfurated plaster 3%, hydroxyl
Methylcellulose 0. 5；In the iron ore tailings, the percentage by weight of powder amount of the granularity less than 0.088mm is 95%；Activity
The weight percent content of calcium oxide is 82% in lime minus mesh.
Preparation method：
1）First all materials are well mixed；
2）Mixed compound is inserted in pelletising drum or disc balling machine, and according to raw material gross weight percentage
12% amount extremely soaks shape to water spray on compound；Manufacture green-ball；
3）Made green-ball is dried, drying temperature is controlled at 118 DEG C, and drying time is in 17min；
4）Preheated, preheating temperature is 850~870 DEG C, preheating time 24min；
5）It is calcined, sintering temperature is 1095 DEG C, roasting time 21min；
6）Room temperature is naturally cooled to, it is standby.
After testing, prepared haydite, its bulk density are 1026kg/m3, cylindrical compress strength 8.9MP；In the trial employment period, not
It was found that and generation haydite cracking phenomena.
Embodiment 6：
A kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tail
Ore deposit：89%, granularity≤0.074mm kaolin：5.9%, fabric and raw-vermiculite powder：1%, active lime minus mesh：2%, desulfurated plaster 2%, first
Base cellulose 0. 1；In the iron ore tailings, the percentage by weight of powder amount of the granularity less than 0.088mm is 99%；Active stone
The weight percent content of calcium oxide is 97% in grey minus mesh.
Preparation method：
1）First all materials are well mixed；
2）Mixed compound is inserted in pelletising drum or disc balling machine, and according to raw material gross weight percentage
8.7% amount extremely soaks shape to water spray on compound；Manufacture green-ball；
3）Made green-ball is dried, drying temperature is controlled at 116 DEG C, and drying time is in 22min；
4）Preheated, preheating temperature is 875~895 DEG C, preheating time 26min；
5）It is calcined, sintering temperature is 1135 DEG C, roasting time 23min；
6）Room temperature is naturally cooled to, it is standby.
After testing, prepared haydite, its bulk density are 1021kg/m3, cylindrical compress strength 9.1MP；In the trial employment period, not
It was found that and generation haydite cracking phenomena.
Present embodiment is only the best example, not to the restricted implementation of technical solution of the present invention.
Claims (9)
1. a kind of iron ore tailings haydite, it includes raw material and weight percent content is：Granularity≤0.088mm iron ore tail
Ore deposit：75~90%, granularity≤0.074mm kaolin：3~15 %, fabric and raw-vermiculite powder or perlite：0.5~3%, active lime sieve
Blanking：0.5~5%, haydite performance：Bulk density is in 650~1100kg/m3, cylindrical compress strength is in 5~9.2MPa.
A kind of 2. iron ore tailings haydite as claimed in claim 1, it is characterised in that：It is added with weight percent content
0.5~3 % desulfurated plaster.
A kind of 3. iron ore tailings haydite as claimed in claim 1, it is characterised in that：It is added with weight percent content
0.01~1 % methylcellulose or hydroxymethyl cellulose.
A kind of 4. iron ore tailings haydite as claimed in claim 1, it is characterised in that：Granularity is less than in the iron ore tailings
0.088mm accounting is not less than 50%.
A kind of 5. iron ore tailings haydite as claimed in claim 1, it is characterised in that：Aoxidized in the active lime minus mesh
The weight percent content of calcium is not less than 80%.
6. prepare a kind of method of iron ore tailings haydite as claimed in claim 1, its step：
1）First all materials are well mixed；
2）Mixed compound is inserted in pelletising drum or disc balling machine, and according to raw material gross weight percentage 6 ~
12% amount extremely soaks shape to water spray on compound；Manufacture green-ball；
3）Made green-ball is dried, drying temperature is controlled at 105~130 DEG C, and drying time is in 10-30min；
4）Preheated, preheating temperature is 600~900 DEG C, and preheating time is 15~30min；
5）It is calcined, sintering temperature is 950~1150 DEG C, and roasting time is 10~25min；
6）Room temperature is naturally cooled to, it is standby.
7. a kind of method of iron ore tailings haydite is prepared as claimed in claim 6, it is characterised in that：Drying temperature control exists
110~125 DEG C.
8. a kind of method of iron ore tailings haydite is prepared as claimed in claim 6, it is characterised in that：Preheating temperature is 650
~860 DEG C.
9. a kind of method of iron ore tailings haydite is prepared as claimed in claim 6, it is characterised in that：Sintering temperature is 980
~1120 DEG C.
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| CN111087185A (en) * | 2019-12-19 | 2020-05-01 | 广东清大同科环保技术有限公司 | Foamed lightweight aggregate prepared from iron tailings and preparation method thereof |
| CN112159153A (en) * | 2020-09-18 | 2021-01-01 | 西安交通大学 | Proppant for underground in-situ pyrolysis of coal, preparation method and filling method |
| CN113501692A (en) * | 2021-07-08 | 2021-10-15 | 抚州市正兴混凝土有限公司 | Light heat-insulating concrete |
| CN114455872A (en) * | 2022-03-22 | 2022-05-10 | 中冶建筑研究总院有限公司 | Low-density high-strength lightweight aggregate prepared from mine waste |
| CN114933434A (en) * | 2022-05-26 | 2022-08-23 | 中南大学 | Method for preparing high-strength light aggregate by iron tailing and coal gangue pelletizing method |
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| CN114455872A (en) * | 2022-03-22 | 2022-05-10 | 中冶建筑研究总院有限公司 | Low-density high-strength lightweight aggregate prepared from mine waste |
| CN114933434A (en) * | 2022-05-26 | 2022-08-23 | 中南大学 | Method for preparing high-strength light aggregate by iron tailing and coal gangue pelletizing method |
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Application publication date: 20180209 |