CN103613302A - Waste slag shale high-strength lightweight aggregate and preparation method thereof - Google Patents

Abstract

The invention discloses a waste slag shale high-strength lightweight aggregate and a preparation method thereof. The aggregate comprises the following components in parts by weight: 60-100 parts of shale, 45-60 parts of fly ash, 0.05-0.95 part of silicon carbide and 4-8 parts of slag, wherein the protodyakonov hardness coefficient of the shale is 1.5-5 preferably 4-5, the plasticity index range is 5-23, the drying sensitivity coefficient is 0.14-1.6, and the drying linear shrinkage ratio is 2.5-10%; the shale comprises the following components in percentage by weight: 13% of ignition loss, 52-70% of SiO2, 2-5% of Fe2O3, 14-20% of Al2O3, 7-12% of CaO and 0.1-4% of MgO; the slag comprises the following components in percentage by weight: 0% of ignition loss, 36.62% of SiO2, 1.75% of Fe2O3, 12.30% of Al2O3, 33.54% of CaO and 6.94% of MgO; the fly ash comprises the following components in percentage by weight: 5-10% of ignition loss, 53-70% of SiO2, 7-10% of Fe2O3, 12-20% of Al2O3, 7% of Ca and 2-5% of MgO; the purity of silicon carbide is 80%.

Description

A kind of waste residue shale high strength lightweight aggregate and preparation method thereof

Technical field

The invention belongs to inorganic non-metallic field, be specifically related to a kind of waste residue shale high strength lightweight aggregate and preparation method thereof.

Background technology

Haydite light aggregate concrete is the first field of haydite application always.This year; due to the fast-developing and emergence of the Pottery products such as figuline building blocks, wallboard, roof boarding, haydite light aggregate concrete has been withdrawn to the second largest field of haydite application, but from haydite concrete self longitudinal comparison; application quantity is still rapid growth, and tempo is fast year by year.Along with the continuous expansion of haydite Application Areas, the ratio of haydite concrete in haydite application total amount is certain to decline, but its acquisition application widely is also inevitable.Should be concrete light materialization must develop, and must rely on haydite, and this is the certainty of Human Architecture civilization.

Lightweight aggregate concrete has run into unprecedented opportunity to develop in China, and this has given us new opportunities and challenges.Produced haydite under the manufacturing condition of current artificial porcelain granule (containing high-strength ceramic granule), its pore texture is poor, not only spherical aperture diameter is larger, and percentage of open area is high, the defects such as crack are also more, all cause water-intake rate larger, the performance that this haydite is put to light aggregate concrete and construction have all brought a difficult problem and difficulty, so this research to light-weight aggregate firing process to local resource increasing of various places.

Raising along with " building energy conservation " requirement, the high-strength ceramic granule demand being used in building structure is also increasing gradually, through research in a few years, we have these the two kinds of compound utilizations of low-grade raw material of industrial residue flyash by abundant Purple Shale Mineral resources and power station, Zhangjiakou, Shangyi County, Zhangjiakou, have manufactured composite haydite.However, the performance of this composite haydite is stable not enough, and some performance does not also reach desirable design objective.This also makes in Shangyi County, just to utilize at present what carry out when the work of raw material development high-strength ceramic granule is not also fine, and this needs us on the basis of original formula, and further inquiring into several addition materials affects sintering character, water-intake rate, rate of expansion and sintering range.To accomplish carrying out production control product performance in the method for fine setting additive, be that achievement in research is promoted in better simply mode.

Summary of the invention

For deficiency of the prior art, the object of the present invention is to provide a kind of waste residue shale high strength lightweight aggregate and preparation method thereof.To produce a kind of high-intensity waste residue shale light skeletal.

To achieve these goals, the technical scheme that the present invention takes is:

A waste residue shale high strength lightweight aggregate, the components by weight percent of described aggregate is shale 60-100 part, three grades of flyash 45-60-parts, silicon carbide 0.05-0.95 part, slag 4-8 part, wherein, the Polodyakonov coefficient coefficient of described shale is 1.5～5, preferably Polodyakonov coefficient coefficient is 4～5, plasticity index scope is 5～23, and drying sensitivity coefficient is 0.14～1.6, and drying line shrinking percentage is 2.5～10%, described shale comprises loss on ignition 13%, SiO ₂52-70%, Fe ₂o ₃2-5%, Al ₂o ₃14-20%, CaO7-12%, MgO0.1-4%; The component of described slag comprises that loss on ignition is 0, SiO ₂36.62%, Fe ₂o ₃1.75%, Al ₂o ₃12.30%, CaO33.54%, MgO6.94%; Described flyash comprises that loss on ignition is 5-10%, SiO ₂53-70%, Fe ₂o ₃7-10%, Al ₂o ₃12-20%, CaO7%, MgO2-5%; The purity of silicon carbide is 80%.

A preparation method for waste residue shale high strength lightweight aggregate, comprises the steps:

Step 1 shale is dried, equipment, electron temperature-control far infrared drying oven, specification 800 * 800 * 1000, top temperature, 300 ℃, voltage, 500V, frequency, 50HZ, power, 6000W, electric current, 4A, weight, 88K part, precision, 1.0, range, 0-300, copper basin, material shovel; Each copper basin is got about 5k part left and right, altogether seven basins; The copper basin of getting honest material is put into drying baker successively, switch on power, it is 110 ℃ that drying baker bake out temperature is set, and drying time is 7 hours, manually timing;

Step 2 shale grinds

Equipment, the little mill of laboratory in cement works uniform tests, model: SM500; Specification:

500 * 500mm rotating speed 48r/min, platform balance, material shovel, bucket.

With platform balance, according to proportioning raw materials, weigh dried shale, put aside stand-by; Beat cutting machine mouth, load weighted shale is put into material machine, and the grinding lid of material machine is firmly twisted; Switch on power, open switch and carry out grinding, grinding time is approximately 10min, then manually stops; After pulverizer stall, open lid, change discharging lid, tighten, power-on, rotation 3min left and right, manually stops, and collects the shale in discharge bucket; With the each shale that weighs 5 parts of platform balance, put into grinding machine, twist good grinding lid, switch on power, carry out grinding, set of time is 48min, and then discharging is collected, and label is stand-by;

Step 3 raw material mixes

Step 4 balling-up

Equipment: glue sand agitator, graduated cylinder, common drug balance, 2 parts of 2000 parts of sensibility reciprocals of maximum capacity, scuppit, ceramic whiteware dish, plastic tub, the mixture mixing is taken respectively to 500 parts, write label stand-by, with graduated cylinder, take the water of 125ml, stand-by, glue sand agitator is switched on power, open and manually control shelves.Mixture is poured in agitator kettle, be placed on stirrer, open and stir slowly, water adds in agitator kettle slowly, approximately after 4min, stops stirring.Take out and stir domestic mixture, putting into basin rubs twice with strength with hand, then with wet cloth, muffle general 30min, by the hand rubbing balling-up of the mixture in basin, diameter is in 12mm left and right, number is 150 left and right, the ball of just having rubbed with the hands is put into ceramic whiteware dish, has gap between ball, prevents adhesion, ceramic whiteware dish is put in the cool, allowed bead dry in the shade;

Step 5 roasting

Equipment: pottery basin, both sides are amputated, and vernier callipers is accurate to 0.02mm, pure zirconia aluminium powder; The pottery basin bottom part that both sides are all amputated is put the aluminum oxide that one deck is pure, prevents from when bead from putting up rolling, and causes the adhesion of sintering; Picking diameter is similar, and the bead that sphericity is higher is put; First on limit, put 10 beads, and measure its diameter, two kinds of proportionings all will be surveyed, and measure two numerical value, average, then put in midfeather two kinds of beads that proportioning is different;

Step 6 is fired

Fire system: 0-100 ℃ of 5min; 100-200 ℃ of 4min; 200-750 ℃ of 16min; 750 ℃ of-1200 ℃ of 35min, according to the insulation system after roasting, make following setting: 1200 ℃ of-1000 ℃ of employings are lowered the temperature at a slow speed, and 1000 ℃-750 ℃ adopt fast cooling system, 750 ℃ of insulation 15min, and 750 ℃-400 ℃ adopt fast cooling; Equipment: 1600 ℃ of stoves that are rapidly heated, gloves, asbestos; porcelain iron basin; vernier callipers, is accurate to the door that 0.02mm opens the stove that is rapidly heated, and the pottery basin that is placed with bead is put into wherein; attention can not be encountered stove silk; what pottery basin can not be put tightly delays inwall, notes retaining space, guarantee to fire evenly; at stove gate, put asbestos, fasten fire door; Switch on power, power-on switch, set temperature system, opens heating, operating temperature system; Observe the output of temperature variation and electric current, guarantee the steady output of electric current, temperature variation is moved according to system; After temperature schedule operation is complete, while waiting interior temperature of stove to drop to 1000 ℃, open fire door, asbestos do not take off, but will open a mouth, so that air blast rapidly, is opened in cooling, accelerate cooling; When temperature drops to 750 ℃, close air blast and fire door, insulation 20min, is then with left-hand seat cover to take off asbestos and puts into porcelain iron basin, opens air blast, starts cooling rapidly; When temperature drops to 400 ℃, with left-hand seat cover, take out burned haydite, be placed on the asbestos of porcelain iron basin, prevent that the kiss the earth temperature difference from bursting too greatly, therefore ground also burn out; When equitemperature drops to 200 ℃, put into another basin bead, according to said process, continue to fire; Etc. burned haydite, drop to after normal temperature, measure in order the bead of measuring at the very start, and label sequence number in order, put into afterwards labelled sealing bag.

Accompanying drawing explanation

Fig. 1 is the XRD analysis figure of product mineral of the present invention;

Wherein, peak value is following table

Embodiment

Embodiment 1

A waste residue shale high strength lightweight aggregate, the components by weight percent of described aggregate is 60 parts, shale, 38 parts, three grades of flyash, 0.95 part, silicon carbide, 2 parts, slag, wherein, the Polodyakonov coefficient coefficient of described shale is 1.5～5, preferably Polodyakonov coefficient coefficient is 4～5, plasticity index scope is 5～23, and drying sensitivity coefficient is 0.14～1.6, and drying line shrinking percentage is 2.5～10%, described shale comprises loss on ignition 13%, SiO ₂52-70%, Fe ₂o ₃2-5%, Al ₂o ₃14-20%, CaO7-12%, MgO0.1-4%; The component of described slag comprises that loss on ignition is 0, SiO ₂36.62%, Fe ₂o ₃1.75%, Al ₂o ₃12.30%, CaO33.54%, MgO6.94%; Described flyash comprises that loss on ignition is 5-10%, SiO ₂53-70%, Fe ₂o ₃7-10%, Al ₂o ₃12-20%, CaO7%, MgO2-5%; The purity of silicon carbide is 80%.

Embodiment 2

A waste residue shale high strength lightweight aggregate, the components by weight percent of described aggregate is 50 parts, shale, 48 parts, flyash, 0.1 part, silicon carbide, 2 parts, slag, wherein, shale Polodyakonov coefficient coefficient is 5, and plasticity index scope is 23, and drying sensitivity coefficient is 1.6, drying line shrinking percentage is 10%, and described shale comprises loss on ignition 13%, SiO252%, Fe2O35%, Al2O320%, CaO12%, MgO4%; The component of described slag comprises that loss on ignition is 0, SiO236.62%, Fe2O31.75%, Al2O312.30%, CaO33.54%, MgO6.94%; Described flyash comprises that loss on ignition is 10%, SiO253%, Fe2O310%, Al2O320%, CaO7%, MgO5%; The purity of silicon carbide is 80%.

By the raw material in embodiment 1 and 2, the preparation method according in the application, is prepared.Then product is measured respectively as follows

Ionization meter

Equipment: universal testing machine

Step:

(1) sheet of pressing machine is taken down, switched on power, cushion block is placed on pressing machine.

(2) haydite in sealing bag is taken out, put into brokenly in gloves, then gloves are placed on the cushion block of pressing machine.

(3) opening pressure machine, output pressure is closed output when bead is broken, record number pressure now.Measure successively the pressure of each bead.

(4) powered-down, tidies up broken haydite, and by pressing machine with on sheet cover.

Water-intake rate is measured

Equipment: common drug balance (2 parts of 2000 parts of sensibility reciprocals of maximum capacity), beaker (10), cement dried persimmon (survey soundness of cement), towel, sieve

Step: (1) is placed on haydite on balance, weighs its weight record.(2) beaker is piled to water, load weighted haydite is put into wherein, with cement dried persimmon, press, haydite is immersed in the water completely, and finish writing label and be placed on beaker side.(3) every 10min, just according to above-mentioned steps, weigh, soak one group of haydite.Etc. (4) when first group of bead soaks 1h, take out, be placed on sieve and control water 2min, be then placed on wet towel, roll back and forth 8 times, then weigh its weight, and record, then put into beaker, build.Next after just going next group to process according to the method described above, 10min measures its weight, record successively.(5) after first group of immersion 24h, take out, be placed on sieve and control water 2min, be then placed on wet towel, roll back and forth 8 times, measure its weight, record.

Cubing

Equipment: graduated cylinder

Step:

(1) water of 500ml will be put in graduated cylinder.

(2) by putting into graduated cylinder after the haydite control water after 24h measurement, observe the volume at the liquid level place after putting into, record.

(3) measure successively the volume of each proportioning.

The performance of table 1 haydite

Title	Embodiment 1	Embodiment 2
			Rate of expansion (%)	3	1
Ultimate compression strength (MPa)	13.1	14.1
			Density	1.46	1.50
Water-intake rate	1	2

The mineralogical composition of the haydite after 1160 ℃ of roastings is mainly the mineral such as plagioclase class.See Fig. 1

Finally it should be noted that: obviously, above-described embodiment is only for the application's example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being amplified out thus or change are still among the protection domain in the application's type.

Claims (2)

1. a waste residue shale high strength lightweight aggregate, is characterized in that: the components by weight percent of described aggregate is shale 60-100 part three grades of flyash 45-60 parts, silicon carbide 0.05-0.95 part, slag 4-8 part, wherein, the Polodyakonov coefficient coefficient of described shale is 1.5～5, preferably Polodyakonov coefficient coefficient is 4～5, plasticity index scope is 5～23, and drying sensitivity coefficient is 0.14～1.6, and drying line shrinking percentage is 2.5～10%, described shale comprises loss on ignition 13%, SiO ₂52-70%, Fe ₂o ₃2-5%, Al ₂o ₃14-20%, CaO7-12%, MgO0.1-4%; The component of described slag comprises that loss on ignition is 0, SiO ₂36.62%, Fe ₂o ₃1.75%, Al ₂o ₃12.30%, CaO33.54%, MgO6.94%; Described flyash comprises that loss on ignition is 5-10%, SiO ₂53-70%, Fe ₂o ₃7-10%, Al ₂o ₃12-20%, CaO7%, MgO2-5%; The purity of silicon carbide is 80%.

2. a preparation method for waste residue shale high strength lightweight aggregate described in claim 1, is characterized in that, comprises the steps:

Step 1 shale is dried, equipment, electron temperature-control far infrared drying oven, specification 800 * 800 * 1000, top temperature, 300 ℃, voltage, 500V, frequency, 50HZ, power, 6000W, electric current, 4A, weight, 88K part, precision, 1.0, range, 0-300, copper basin, material shovel; Each copper basin is got about 5k part left and right, altogether seven basins; The copper basin of getting honest material is put into drying baker successively, switch on power, it is 110 ℃ that drying baker bake out temperature is set, and drying time is 7 hours, manually timing;

Step 2 shale grinds

Equipment, the little mill of laboratory in cement works uniform tests, model: SM500; Specification:

500 * 500mm rotating speed 48r/min, platform balance, material shovel, bucket.

With platform balance, according to proportioning raw materials, weigh dried shale, put aside stand-by; Beat cutting machine mouth, load weighted shale is put into material machine, and the grinding lid of material machine is firmly twisted; Switch on power, open switch and carry out grinding, grinding time is approximately 10min, then manually stops; After pulverizer stall, open lid, change discharging lid, tighten, power-on, rotation 3min left and right, manually stops, and collects the shale in discharge bucket; With the each shale that weighs 5 parts of platform balance, put into grinding machine, twist good grinding lid, switch on power, carry out grinding, set of time is 48min, and then discharging is collected, and label is stand-by;

Step 3 raw material mixes

Step 4 balling-up

Equipment: glue sand agitator, graduated cylinder, common drug balance, 2 parts of 2000 parts of sensibility reciprocals of maximum capacity, scuppit, ceramic whiteware dish, plastic tub, the mixture mixing is taken respectively to 500 parts, write label stand-by, with graduated cylinder, take the water of 125ml, stand-by, glue sand agitator is switched on power, open and manually control shelves.Mixture is poured in agitator kettle, be placed on stirrer, open and stir slowly, water adds in agitator kettle slowly, approximately after 4min, stops stirring.Take out and stir domestic mixture, putting into basin rubs twice with strength with hand, then with wet cloth, muffle general 30min, by the hand rubbing balling-up of the mixture in basin, diameter is in 12mm left and right, number is 150 left and right, the ball of just having rubbed with the hands is put into ceramic whiteware dish, has gap between ball, prevents adhesion, ceramic whiteware dish is put in the cool, allowed bead dry in the shade;

Step 5 roasting

Equipment: pottery basin, both sides are amputated, and vernier callipers is accurate to 0.02mm, pure zirconia aluminium powder; The pottery basin bottom part that both sides are all amputated is put the aluminum oxide that one deck is pure, prevents from when bead from putting up rolling, and causes the adhesion of sintering; Picking diameter is similar, and the bead that sphericity is higher is put; First on limit, put 10 beads, and measure its diameter, two kinds of proportionings all will be surveyed, and measure two numerical value, average, then put in midfeather two kinds of beads that proportioning is different;

Step 6 is fired

Fire system: 0-100 ℃ of 5min; 100-200 ℃ of 4min; 200-750 ℃ of 16min; 750 ℃ of-1200 ℃ of 35min, according to the insulation system after roasting, make following setting: 1200 ℃ of-1000 ℃ of employings are lowered the temperature at a slow speed, and 1000 ℃-750 ℃ adopt fast cooling system, 750 ℃ of insulation 15min, and 750 ℃-400 ℃ adopt fast cooling; Equipment: 1600 ℃ of stoves that are rapidly heated, gloves, asbestos; porcelain iron basin; vernier callipers, is accurate to the door that 0.02mm opens the stove that is rapidly heated, and the pottery basin that is placed with bead is put into wherein; attention can not be encountered stove silk; what pottery basin can not be put tightly delays inwall, notes retaining space, guarantee to fire evenly; at stove gate, put asbestos, fasten fire door; Switch on power, power-on switch, set temperature system, opens heating, operating temperature system; Observe the output of temperature variation and electric current, guarantee the steady output of electric current, temperature variation is moved according to system; After temperature schedule operation is complete, while waiting interior temperature of stove to drop to 1000 ℃, open fire door, asbestos do not take off, but will open a mouth, so that air blast rapidly, is opened in cooling, accelerate cooling; When temperature drops to 750 ℃, close air blast and fire door, insulation 20min, is then with left-hand seat cover to take off asbestos and puts into porcelain iron basin, opens air blast, starts cooling rapidly; When temperature drops to 400 ℃, with left-hand seat cover, take out burned haydite, be placed on the asbestos of porcelain iron basin, prevent that the kiss the earth temperature difference from bursting too greatly, therefore ground also burn out; When equitemperature drops to 200 ℃, put into another basin bead, according to said process, continue to fire; Etc. burned haydite, drop to after normal temperature, measure in order the bead of measuring at the very start, and label sequence number in order, put into afterwards labelled sealing bag.

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