CN109928772A

CN109928772A - A kind of light porous fired brick and preparation method thereof

Info

Publication number: CN109928772A
Application number: CN201910194951.XA
Authority: CN
Inventors: 张岩斌
Original assignee: Xi'an Coal Power Technology Co Ltd
Current assignee: Xi'an Coal Power Technology Co Ltd
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2019-06-25

Abstract

The present invention relates to a kind of light porous fired bricks and preparation method thereof.The light porous baked brick raw materials are made of tailing, slate flour and stalk powder；Each ingredient percent of raw material are as follows: tailing 70~80%, shale 10~15%, stalk powder 10-15%；The tailing after the sorted equipment sorting of coal slime by directly obtaining, the mass percent of each ingredient in tailing are as follows: SiO₂For 45~65%, Al₂O₃For 18~25%, Fe₂O₃For 3~5%, CaO be 3~5%, MgO is 1~3%, remaining is other elements；The tailing plasticity index is 11~18,1.6~2.5 MJ/kg of calorific value.Light porous fired brick performance of the present invention accords with or surpasses national standard, realizes the recycling of coal slime tailing.Preparation method simple process, is greatly saved time cost.

Description

A kind of light porous fired brick and preparation method thereof

Technical field

The invention belongs to materials for wall production fields, and in particular to a kind of light porous fired brick and preparation method thereof.

Background technique

It is to make that light microporous fired brick mostly uses shale, flyash, gangue to mix with sludge, waste residue, sawdust, stalk at present Hole agent carries out micropore transformation to traditional brick, improves the porosity of fired brick, improves the distribution in aperture inside product, realizes energy-saving ring The functions such as guarantor, light, sound insulation, heat preservation.Though using shale for major ingredient farmland saving, raw material is exploited, still destroys vegetation and life State environment.It is major ingredient using flyash, gangue, for brick body there are quality weight, scum, evil mind, lime blowing, weathering resistance are weak, anti- Compressive Strength is low.Though hollow brick has light weight, incubation and thermal insulation function, cavity is big, and inner wall is thin, and compression strength is low.Therefore, it develops A kind of new good raw material is the key that avoid baked light-weight microporous brick defect.

Prior art CN103833410A discloses a kind of " a kind of sintering shale micropore lay bricks and preparation method thereof ", with The shale of 40-60 mass parts builds spoir and the one or more of mud, rubbish/stalk of 30-50 mass parts, 10-35 mass The gangue of part is raw material, and the accumulation for solving part rubbish, stalk, gangue and the building wastes such as spoir and mud is asked Topic, achievees the effect that turn waste into wealth.Meanwhile specification [0012] section discloses gangue and belongs to coal mining waste, adopts It uses gangue as raw material, solves the problems, such as to accumulate pollution environment for a long time.Meanwhile gangue thermal conductivity is high and itself contains Biggish calorific value can further decrease energy consumption needed for sintering in sintering, promote building block internal and external temperature balance, improve sintering matter Amount.

However, about 2,400,000,000 tons of the selected amount of the annual raw coal in China, total slime content of generation is at 2~300,000,000 tons.Since coal slime is The mineral compositions such as kaolin, dunn bass, clay, coal, and pass through multiple flotation, immersion, stirring, filters pressing, make coal and mud phase Complete argillization is mutually adsorbed to be difficult to work with.Currently, a part of coal slime is used for power plants generating electricity, a part of coal slime repeats to use existing set Standby and technique is exhausted a blanking method and has recycled part coal, but tailing calorific value is still in 7~8MJ/kg.These tailings are for electricity Factory's power generation, calorific value is too low directly to be utilized；Environment is polluted in air storage, on the spot landfill and waste of resource；If preparing fired brick, Still contain a large amount of calorific values, has been more than many times of brickmaking requirement, has been sintered at 1150 DEG C, shrinking percentage is big, heap when can lead to sintering Expect the deformation of height, brick body occurs and collapses, the light porous fired brick for meeting national standard performance can not be obtained.Above-mentioned existing skill In art, tailing (i.e. gangue) is used to prepare light porous fired brick as additive, and dosage is limited, and accounting is no more than 30%, there are still a large amount of coal slimes to utilize.

Therefore, a large amount of coal slimes how to be efficiently used and reduce energy waste and environmental pollution, while preparation meets national standard The light porous fired brick of performance becomes urgent problem to be solved.

Summary of the invention

For technical problem of the existing technology, the present invention provides a kind of light porous fired bricks, based on tailing Raw material is wanted, slate flour, stalk powder are equipped with, realizes the effective use of coal slime tailing, while reducing energy waste.It is described Tailing and slate flour, stalk powder cooperate, and interior thermal sintering can go out good light porous fired brick entirely, both save energy Source, performance accord with or surpass national standard again, realize the recycling of coal slime tailing.Specifically, technical side of the invention Case are as follows:

A kind of light porous fired brick, the light porous baked brick raw materials are made of tailing, slate flour, stalk powder；Institute Stating tailing mass percent is 70~80%, and slate flour mass percent is 10~15%, and stalk powder mass percent is 10- 15%；The tailing after the sorted equipment sorting of coal slime by directly obtaining, the mass percent of each ingredient in tailing are as follows: SiO₂For 45~65%, Al₂O₃For 18~25%, Fe₂O₃For 3~5%, CaO be 3~5%, MgO is 1~3%, remaining is other elements；It is described Tailing plasticity index is 11~18,1.6~2.5 MJ/kg of calorific value；Loss on ignition is after tailing and slate flour, stalk powder proportion 6~10%.

Further, the tailing group is divided into 75%, slate flour 13%, stalk powder 12%.

Further, in the tailing each ingredient mass percent are as follows: SiO₂For 55%, Al₂O₃For 20%, Fe₂O₃For 4%, CaO is 4%, MgO 2%, remaining is other elements；The tailing plasticity index is 15, calorific value 2.0MJ/kg；Tailing and shale Loss on ignition is 8% after powder, stalk powder proportion.

Further, the moisture content of the tailing is 22~25%.

Further, the screening installation is sorting column, and the sorting column includes main sorting cylinder (100) He Yuzhu At least two sorting cylinders (101,102) that sorting cylinder (100) is sequentially communicated, main sorting cylinder (100) and time sorting column Body (101,102) includes the ore pulp multiple spot distributor (7) of upper position in being provided at its inner portion, is arranged outside it and and mine Slurry multiple spot distributor (7) be connected to by pipeline high speed disperser device (2), be arranged at the top of it foam capturing device (4), The generation of several microvesicles is arranged in atomizing sprayer (5), the circular its underpart outer wall position being arranged on foam capturing device (4) Device (10), is arranged at it the conveying tracheae (9) for being circumferentially positioned at its outside and being connected to by pipeline with microvesicle generators (10) The tailing overflow discharge nozzle (11) that outside is connected to its bottom；The high speed disperser (2) includes the motor being arranged in outside it (22) and with motor (22) the dispersion rotor (23) being provided at its inner portion connecting；The tailing overflow discharge nozzle (11) and high speed The pipeline of dispersion machine device (2) is equipped with regulating valve (111)；The conveying tracheae (9) passes through pipeline and air accumulator (8) and air Compressor (81) is sequentially connected；Pressure maintaining valve and barometric damper are provided on the air accumulator (8)；The main sorting cylinder It (100) further include the ore pulp reaction chamber (1) for being arranged outside it and being sequentially communicated by pipeline and high speed disperser device (2) With feeding inlet (103)；Pipeline before the ore pulp multiple spot distributor (7) is equipped with dehvery pump (3)；The dosing mouth (61) and Tonic mouth (62) is connected to medicine-chest (6) by pipeline；The ore pulp reaction chamber (1) includes setting in ore pulp reaction chamber (1) The stirring rotor (112) in portion and fall plate (113)；The pipeline of the ore pulp reaction chamber (1) and feeding inlet (103) is equipped with dosing Mouth (61)；The tailing overflow discharge nozzle (11) of main sorting cylinder (100) and the height of sequentially connected sorting cylinder (101) Fast dispersion machine device (2) is connected to by pipeline, the tailing overflow discharge nozzle (11) of described time sorting cylinder (101) be sequentially connected Secondary sorting cylinder (102) high speed disperser device (2) pass through pipeline be connected to, the tailing overflow discharge nozzle (11) and high speed Tonic mouth (62) are equipped on the pipeline of dispersion machine device (2)；Sequentially connected the last one sorting cylinder (102) Tailing overflow discharge nozzle (11) is equipped with discharge gate (105)；Main sorting cylinder (100) and the secondary sorting cylinder being sequentially communicated The foam capturing device (4) of (101,102) is connected to by pipeline and is equipped with discharge port (104) on the pipeline.

Further, the preparation method of the light porous fired brick is using complete interior thermal sintering, comprising the following steps:

Step 1: being 15~18% by tailing drying to moisture content；

Step 2: shale being broken for slate flour, screen size is < 2mm；

Step 3: by stalk dissection, crushing, obtain the stalk powder of partial size < 0.1mm；

Step 4: above-mentioned tailing, slate flour, stalk powder being mixed in proportion, stirring system stirring is delivered to, rolls；

Step 5: step 4 obtained solid being sequentially input into vacuum-extruder extrusion, automatic strip-cutting machine slitting, blank cutter stripping and slicing, is obtained Adobe block；

Step 6: adobe block is subjected to preliminarily dried；

Step 7: adobe, which enters tunnel oven by process, successively dries, preheats, roasts, and obtains light porous fired brick.

Further, in the step 4 stirring system by sequentially connected first stirring system and the second stirring system structure At；The mixing speed of first stirring system is 100~300r/min；The mixing speed of second stirring system be 300~ 600r/min；Mixing time is from entering to expect nature discharging time.

Further, the mixing speed of first stirring system is 200~220r/min；Second stirring system Mixing speed is 450~480r/min.

Further, the extrusion pressure of extruder is 3-10MPa in step 5, and vacuum degree is 0.07~0.09MPa.

Further, the extrusion pressure of extruder is 4.00MPa in step 5.

Further, maturing temperature is 850~1050 DEG C in step 7, calcining time is 40~48 hours.Micropore of the present invention Lightweight clinker brick and preparation method are compared to be had the advantages that with the prior art

Light porous fired brick of the present invention: (1) foring a large amount of closed subtle holes in light porous fired brick body, and one Determine to increase the thermal resistance of brick body in degree, enhances brick body heat preservation, heat-insulated, noise reduction purpose, improve the thermal insulation separation of masonry panel Hot property；(2) light porous fired brick alleviates brick body quality due to there is a large amount of stomatas in brick body；(3) light porous sintering is burnt Tie that the time is fast 32%, yield is high, at low cost；(4) light porous baked brick raw materials granularity < 0.043mm accounts for 85%, fine size, modeling Property high, forming, good appearance；(5) Al of the light porous fired brick of the present invention₂O₃Than the Al of conventional sintering brick raw material₂O₃It is high by 15 ~25%, product has the characteristics that high pressure-proof and snap-resistent intensity, freeze proof, sound-absorbing, anti-rotten, permeable, ventilative；(6) it is sintered than conventional microporous 35% or more brick brick body weight saving.

The preparation method of light porous fired brick of the present invention: (1) it raw material coal slime sorted column sorting after obtains, extends Coal slime comprehensively utilizes industrial chain, realizes upstream and downstream industrial chain seamless interfacing, " waste " is made to turn waste into wealth；(2) micropore is light The bio-wastes such as stalk are utilized in matter fired brick, reduce the pollution to environment, solve the problems, such as stalk recycling and reusing； (3) light porous fired brick is entirely autoignition sintered, and sintering velocity is fast, and yield is high, does not add combustible, energy conservation and environmental protection；(4) and it is traditional Micropore sintered brick is compared, and exempts to build raw material storage, without Cheng Huaku etc..Invest that small, occupied area is small, process flow is simple, production cost Cheap, energy conservation and environmental protection is suitble to industrialization production；(5) compared with conventional microporous fired brick, exempt to be crushed, burden process, raw material is defeated It send, civil engineering etc., reduces production cost, energy conservation and environmental protection；(6) raw material directly feeds brickmaking workshop by coal slime tailing, reduces original Material handling, transportation cost, reduce the pollution to environment；(7) fewer than conventional sintering brick brickmaking process, whole efficiency improves 30%.

Detailed description of the invention

Fig. 1 is sorting column schematic diagram of the present invention.

It is as follows that corresponding structure is numbered in figure:

1,2. high speed disperser device of ore pulp reaction chamber, 3. dehvery pump, 4. foam capturing device, 5. atomizing sprayer 6. conveying 10. microvesicle generators of tracheae, the 11. tailing overflow of 7. ore pulp multiple spot distributor of medicine-chest, 8. air accumulator 9. goes out 22. motor 23. of expects pipe disperses the main sorting column of 61. dosing mouth of rotor, 62. tonic mouth, 81. air compressor 100. 104. discharge port of sorting 103. feeding inlet of cylinder of sorting cylinder 102. times of body 101. times, 105. discharge gate 111. Regulating valve 112. stirs rotor 113. and falls plate

Specific implementation method

Clear and complete description is carried out to technical solution of the present invention below in conjunction with attached drawing.Obviously, described embodiment is A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, the ordinary skill people of this field Member's other embodiments obtained without making creative work, belong to protection scope of the present invention.

The coal slime after the prior art sorts is chosen, coking coal slime ash content is 50-60%；Calorific value is dynamic for 8~12MJ/Kg Power coal coal slime ash content is 35-60%；Coal slime calorific value is that 8~16MJ/Kg water content is 20~30%；By the coal slime through coal slime Pulper carries out broken slurrying and obtains black water.It is (public that Tangshan research institute, Zhong Meike work group utility model can be used in coal slime pulper The number of opening: CN206334764U) disclosed in coal slime pulper slurrying.By the black water through 120 mesh of JKS type high frequency Coal slime dehydration sieve Sieve carries out coal slime classification, and gained coarse slime is sorted by TBS interference bed；Gained partial size < 0.125mm fine coal slurry ore pulp is by flotation Machine carries out flotation, and the tailing input screening installation after flotation is sorted, and obtains the raw materials used in the present invention tailing.

Shale moisture content is 2~5% in the embodiment of the present invention.Shalification ingredient percent are as follows: SiO₂For 45~ 70%、Al₂O₃For 12~25%, Fe₂O₃For 2.0~10%, CaO be 0.2%~12%, MgO is 0.1%~5%, remaining is other yuan Element.

The screening installation is that a kind of air-filled nanometer bubble sorts column, and with reference to Fig. 1, main sorting cylinder 100 is sequentially connected Two sorting cylinders 101,102；

Main sorting cylinder 100 and time sorting cylinder 101,102 include the ore pulp multiple spot distribution of upper position in being provided at its inner portion Device 7, is arranged in Qi Ding the high speed disperser device 2 for being arranged in outside it and being connected to by pipeline with ore pulp multiple spot distributor 7 The foam capturing device 4 in portion, the atomizing sprayer 5 being arranged on foam capturing device 4 are arranged around its underpart outer wall position Several microvesicle generators 10, be circumferentially positioned at its it is external and be connected to microvesicle generators 10 by pipeline conveying tracheae 9, The tailing overflow discharge nozzle 11 being connected to outside it with its bottom is set.

Conveying tracheae 9 is sequentially connected by pipeline with air accumulator 8 and air compressor 81.

Pipeline before ore pulp multiple spot distributor 7 is equipped with dehvery pump 3, is used for high speed transfer ore pulp, the conveying warp of delivery pump 3 The fusion of high speed disperser device 2 emulsifies, the ore pulp of mineralising to ore pulp multiple spot distributor 7, and making its ore pulp material spray is in atomization form, The bubble for reaching ore pulp solid, liquid, medicine and floating comes into full contact with collision, reaches good separating effect.

High speed disperser device 2 is the staving that a diameter is 400mm, including motor 22 and the setting connecting with motor 22 Dispersion rotor 23 inside it；Motor 22 can be direct current generator or alternating current generator；Using the limited public affairs of Shanghai Ban get Rui industry The dispersion machine of model FSF~80 of manufacture, the direct-connected dispersion rotor 23 for driving a diameter 300mm of motor 22 are taken charge of, revolving speed is 1460r/min.High speed disperser device 2, in addition centrifugal force acts on, makes because dispersion 23 high speed rotation of rotor has certain negative pressure Ore pulp or froth concentrate are collided by disk center to external diffusion and its inner wall of barrel strong friction, and foam ore pulp is cut in formation It cuts, disperse, emulsifying, defoaming effect.Dispersion, emulsified state ore pulp are conducive to sort again.

Main sorting cylinder 100 further includes being arranged outside it and being sequentially communicated by pipeline with high speed disperser device 2 Ore pulp reaction chamber 1 and feeding inlet 103.Pipeline between ore pulp reaction chamber 1 and feeding inlet 103 is equipped with dosing mouth 61, dosing Mouth 61 is connected to medicine-chest 6 by pipeline, and feeding operations are used for, and the ore pulp reaction chamber 1 includes being arranged inside ore pulp reaction chamber 1 Stirring rotor 112 and fall plate 113；Under the impact of ore pulp, the stirring rotation of rotor 112 is stirred mixing to ore pulp, then Impact it is multiple it is staggered fall on plate 113, be successively stirred again；Make ore pulp in reaction chamber 1 solid, liquid, medicine into Row initial reaction, contact, fusion.

The tailing overflow discharge nozzle 11 of main sorting cylinder 100 and the high speed disperser of sequentially connected sorting cylinder 101 Device 2 is connected to by pipeline, and the tailing overflow discharge nozzle 11 of secondary sorting cylinder 101 sorts cylinder 102 with sequentially connected time High speed disperser device 2 is connected to by pipeline, the mine overflow discharge nozzle 11 and height of main sorting cylinder 100, secondary sorting 101 tail of cylinder Tonic mouth 62 is equipped on the pipeline that fast dispersion machine device 2 connects；The tailing of sequentially connected the last one sorting cylinder 102 Overflow discharge nozzle 11 is equipped with discharge gate 105；The pipeline that tailing overflow discharge nozzle 11 is connect with high speed disperser device 2 is equipped with Regulating valve 111, for adjusting the flow of tailing.

Dosing mouth 61 and tonic mouth 62 are connected to medicine-chest 6 by pipeline, for dosing or supplement medicine.

Main sorting cylinder 100 is connected to the foam capturing device 4 for the secondary sorting cylinder 101,102 being sequentially communicated by pipeline And discharge port 104 is equipped on the pipeline.

Conveying tracheae 9 is for being connected to microvesicle generators 10；Microvesicle generators 10 are with staged rebuilding, upper layer arrangement 16 Branch, lower layer arrangement 8, for every layer of air-filled nanometer bubble generator around cylinder etc. than setting, length stays constant makes bubble exist Disperse is uniformly kept in cylinder, to improve the collision sticking probability of ore pulp and bubble, improves beneficiating efficiency.Microvesicle generators 10 are adopted With the air-filled nanometer microvesicle generators for model DJ101~700~0.25 that Shanghai Ding Ji pneumatic machinery Co., Ltd manufactures 10, when pressure is 6~7kpa, frothing foam diameter is 0.0025mm, inflates uniform, constant magnitude, bubble in upper up-flow Middle merger is few broken few, contact, collide with the ore pulp of sinking, mineralising it is abundant, 95% tail is accounted for for fine particle size < 0.045mm Mine, the parsing dissociation effect with good coal and mud.

Microvesicle generators 10 directly spray generation nanometer gas in air to main 100 body of sorting column, secondary sorting column 101,102 Bubble, nano bubble group slowly rise from cylinder bottom；Ore pulp is away from feeding ore pulp multiple spot point by dehvery pump 3 at top cylinder about 1.2m Orchestration 7, ore pulp flows downward, and the bubble of rising and the ore particle of decline are collided in collecting area counter current contacting, completes bubble mineralization, makes Froth bed is floated to by the coal grain bonded on bubble, froth bed thickness is arranged 1.2 meters, in the work of 5 spray washing of atomizing sprayer The plaster carried with lower removing bubble, makes the bubble risen complete secondary enrichment, and the concentrate foam overflow of enrichment enters foam trapping High speed disperser device 2 in device 4, high speed disperser device 2 are sheared foam, are dispersed, are emulsified, are defoamed.

It is provided with pressure maintaining valve and barometric damper on air accumulator 8, for adjusting microvesicle generators 10 to the soakage of gas； Gas source is regard gas input air accumulator 8 as using air compressor 81.

Atomizing sprayer 5 is set as total score form of tubes, and respectively one straight tube of arrangement, multiple atomizer dispersions are installed in length and breadth In on straight tube, atomizer can be compression spray head, ultrasonic type spray head or net formula spray head, preferred compressed formula, stability height；Tradition Spray water system be that pipeline drips or water spraying mode, be fitted without atomizer, the water of ejection and foam contacting face are small, less than The 15% of foam regions, therefore, to foam entrainment plaster to rush grey effect poor；The water atomization sprayed can be made more by installing atomizer additional It is dispersed on foam, no dead angle, 100% all standing foam regions, effectively solves the problems, such as that foam " back ash " is serious, improve sorting Effect；Atomized water is full of foam regions, and adjustment atomising device height avoids impacting formation of foam, and causing to fall and break is atomized water speed and subtracts Weak, atomization water consumption is in 60~90m3/h, about the 45~80% of feeding, conducive to the plaster for rinsing foam entrainment.

It is 70g/L, ash content 55%, for calorific value is the coking coal ore pulp of 8~12MJ/kg with concentration.

Step 1: 6 automatic medicine adding apparatus of medicine-chest is opened, is configured with collecting agent, foaming agent by 1.2:1, it is defeated by dosing mouth 61 Enter ore pulp reaction chamber 1；

Step 2: ore pulp being delivered to ore pulp reaction chamber 1 by feeding inlet 103, the ore pulp of input drives stirring for ore pulp reaction chamber 1 Mix rotor 112 operating, fallen plate 113 to ore pulp carry out fusion fall；

Step 3: the high speed disperser device 2 and delivery pump 3 of the outside of the main sorting cylinder 100 of starting, 22 revolving speed of motor are 1460 Turn/min, 3 1460 turns/min of revolving speed of delivery pump, ore pulp high speed dispersion rotor 23 shear, dispersion, emulsification, mineralising under the conditions of, by Ore pulp multiple spot distributor 7 in 3 transfer ore pulp of delivery pump to main sorting cylinder 100；

Step 4: when ore pulp fills the 60% of main sorting 100 volume of cylinder, starting air compressor 81, adjust the total gas transmission of gas transmission tank 8 Amount, the microvesicle generators 10 for opening 100 lower parts on main sorting cylinder are arranged pressure in 6~7kpa, frothing foam diameter and are 0.0025mm；

Step 5: when the foam capturing device 4 of main sorting cylinder 100 overflows foam, starting the atomizing spray of main sorting cylinder 100 Device 5, froth pulp are discharged from discharge port 104, can obtain ash content 20% hereinafter, the coal that the rate of recovery is 35% or more；At this time Tailings ash content can achieve 72% or more, calorific value 4.2MJ/kg or less；

Step 6: opening 2 He of high speed disperser device outside the regulating valve 111 and time sorting cylinder 101 of main sorting cylinder 100 Delivery pump 3,22 revolving speed of motor are 1460 turns/min, 3 1460 turns/min of revolving speed of delivery pump, open the automatic tonic device of medicine-chest 6；Tail The tailing overflow discharge nozzle 11 of the sorted column 100 of mine is delivered to time external high speed disperser device 2 of sorting cylinder 101, passes through Tonic mouth 62 before secondary sorting cylinder 101 supplements drug, and ore pulp is after high speed dispersion rotor 23 is sheared, disperses, emulsifies, by conveying Ore pulp multiple spot distributor 7 in 3 conveying tailing of pump to secondary sorting column 101；

Step 7: when tailing fills the 60% of time sorting 101 volume of cylinder, opening time microvesicle generators 10 of sorting column 101, setting Pressure is 0.0025mm in 6~7kpa, frothing foam diameter；

Step 8: when the foam capturing device 4 of secondary sorting cylinder 101 overflows foam, starting time atomizing spray of sorting cylinder 101 Device 5, froth pulp are discharged from discharge port 104, can obtain the coal below of ash content 20%；Tailings ash content can achieve at this time 78% or more, calorific value 2.5MJ/kg or less；

Step 9: 2 He of high speed disperser device outside the regulating valve 111 of starting time sorting cylinder 101 and time sorting cylinder 102 Delivery pump 3,22 revolving speed of motor are 1460 turns/min, 3 1460 turns/min of revolving speed of delivery pump, open the automatic tonic device of medicine-chest 6；Tail The tailing overflow discharge nozzle 11 of the sorted column 101 of mine is delivered to time external high speed disperser device 2 of sorting cylinder 102, passes through Tonic mouth 62 before secondary sorting cylinder 102 supplements drug, and ore pulp is after high speed dispersion rotor 23 is sheared, disperses, emulsifies, by conveying Ore pulp multiple spot distributor 7 in 3 conveying tailing of pump to secondary sorting column 102；

Step 10: when tailing fills the 60% of time sorting 102 volume of cylinder, opening the microvesicle generators on time sorting cylinder 102 10, setting pressure is 0.0025mm in 6~7kpa, frothing foam diameter；

Step 11: when the foam capturing device 4 of secondary sorting cylinder 102 overflows foam, starting time atomizing spray of sorting cylinder 102 Device 5, froth pulp are discharged from discharge port 104, can obtain a small amount of coal below of ash content 20%；

Step 12: tailing is discharged into tailing pit concentration pressure through the discharge gate 105 on time tailing overflow discharge nozzle 11 of sorting cylinder 102 Filter, can obtain the tailing of ash content 78~85%, 1.6~2.5MJ/kg of calorific value.

It is 80g/L with concentration, ash content 50%, for calorific value is the thermal coal ore pulp of 8-16MJ/kg:

It is identical as the sorting step of above-mentioned coking coal slime ore pulp, ash content 78~85%, 1.6~2.5MJ/ of calorific value may finally be obtained The tailing of kg.

Above-mentioned tailing, that is, raw material of the present invention tailing: SiO₂For 45~65%, Al₂O₃For 18~25%, Fe₂O₃For 3~5%, CaO is 3~5%, MgO is 1~3%, remaining is other elements, and the percentage is mass percent；Plasticity is 11~18；Fever Amount is 1.6~2.5MJ/Kg, and moisture content is 22~25%.After tailing and slate flour, stalk powder proportion loss on ignition be 6~ 10%.The shrinking percentage of light porous fired brick prepared by the present invention is not more than 1.6%.

The compression strength of light porous fired brick prepared by the present invention, aobvious porosity etc. " are built referring to GB/T 2542-2003 Wall brick experimental method " and GB/T 3810.3-2006 " Ceramic Tiles experimental method " tested and analyzed；Test specimen thermal coefficient root It is tested, experiment instrument according to GB/T 10294-2008 " Technology of Steady State Thermal Resistance of Thermal Insulating Material and measurement Guarded hot plate " in relation to characteristic Device is TP MBE-300 plane table thermo.

Light porous fired brick prepared by the present invention, thermal coefficient is not more than 0.20~0.25W/ (mK) under room temperature, To achieve the purpose that reinforcing material insulation, meet the intensity in GB26538-2011 " sintering heat-reserving brick and insulation blocks " It is used it is required that not only can be used as filling wall, the requirement of bearing bricks is also met in intensity.

Embodiment 1

The light porous baked brick raw materials are made of tailing, slate flour, stalk powder；The tailing mass percent is 70%, slate flour mass percent is 15%, and stalk powder mass percent is 15%；The tailing is by the sorted column of coal slime point It is directly obtained after choosing, the mass percent of each ingredient in tailing are as follows: SiO₂For 45%, Al₂O₃For 25%, Fe₂O₃For 5%, CaO 5%, MgO is 3%, remaining is other elements；The tailing plasticity index is 11,1.6 MJ/kg of calorific value.Tailing granularity < 0.1mm, grain Degree < 0.043mm's accounts for 85%.Loss on ignition is 10% after tailing and slate flour, stalk powder proportion.

The light porous fired brick the preparation method is as follows:

Step 1: it is 15~18% that Tailings transportation to coal slurry drying-machine, which is dried to moisture content, and the coal slime drying equipment is coal slime Roller drying system；

Step 2: shale being delivered to compound crusher is broken, rotary screen sieves, obtains the slate flour of granularity < 2mm；

Step 3: stalk being cut into the segment less than 30mm, is smash with beater grinder as filamentous, then feed ball milling and be machined to Powder, screening out stalk powder granularity is < 0.1mm.The stalk is preferably rice or corn stover；

Step 4: above-mentioned tailing, slate flour, stalk powder being mixed in proportion, are successively delivered to two continuous models The first and second stirring system stirring of SJJ280 × 36 rolls；The mixing speed of first stirring system is 100~300r/min, excellent It is selected as 200~220r/min；The mixing speed of second stirring system is 300~600r/min, preferably 450~480r/min； Mixing time is from entering to expect nature discharging time.

Step 5: step 4 obtained solid being sequentially input into the bipolar vacuum-extruder vacuum in model JKY50/50D~35 and is squeezed Machine squeezes out out, KQZ automatic strip-cutting machine is cut, QP21 automatic hack cutter stripping and slicing, obtains adobe block, briquet mold: 240mmX115mmX57mm；Extrusion pressure is 3-10MPa, preferably 4.00MPa, and vacuum degree is 0.07~0.09MPa.

Step 6: by 14 layers of the hydraulic Automatic Code base systematic code base of model ZMP330, green body was in outdoor natural drying 24 hours Or it is dried using residual heat of tunnel kiln；

Step 7: adobe, which enters tunnel oven by process, successively dries, preheats, roasts；Drying temperature is 100~200 DEG C, preheating temperature It is 300~500 DEG C, maturing temperature control is 48 hours in 850~1050 DEG C, calcining time；Kiln discharge after fired brick successively cools down, Obtain light porous fired brick, sintering qualified rate 98%.

The comprehensive water absorption rate of prepared light porous fired brick reaches 61% or more, and apparent porosity reaches 52% or more, resists Compressive Strength is 6.8MPa.The equally distributed micropore of certain amount is formd inside burned brick green body.Micropore prepared by the present invention is light The shrinking percentage of matter fired brick is not more than 1.6%.

Embodiment 2

The light porous baked brick raw materials are made of tailing, slate flour, stalk powder；The tailing mass percent is 75%, slate flour mass percent is 13%, and stalk powder mass percent is 12%；The tailing is by the sorted column of coal slime point It is directly obtained after choosing, the mass percent of each ingredient in tailing are as follows: SiO₂For 55%, Al₂O₃For 20%, Fe₂O₃For 4%, CaO 4%, MgO is 2%, remaining is other elements；The tailing plasticity index is 15,2.0 MJ/kg of calorific value.Tailing granularity < 0.1mm, grain Degree < 0.043mm's accounts for 85%.Loss on ignition is 8% after tailing and slate flour, stalk powder proportion.

The light porous fired brick the preparation method is as follows:

Step 7: adobe, which enters tunnel oven by process, successively dries, preheats, roasts；Drying temperature is 100~200 DEG C, preheating temperature It is 300~500 DEG C, maturing temperature control is 45 hours in 850~1050 DEG C, calcining time；Kiln discharge after fired brick successively cools down, Obtain light porous fired brick, sintering qualified rate 98%.

The comprehensive water absorption rate of prepared light porous fired brick reaches 48% or more, and apparent porosity reaches 45% or more, resists Compressive Strength is 8.2MPa.The equally distributed micropore of certain amount is formd inside burned brick green body.Micropore prepared by the present invention is light The shrinking percentage of matter fired brick is not more than 1.6%.

Embodiment 3

The light porous baked brick raw materials are made of tailing, slate flour, stalk powder；The tailing mass percent is 80%, slate flour mass percent is 10%, and stalk powder mass percent is 10%；The tailing is by the sorted column of coal slime point It is directly obtained after choosing, the mass percent of each ingredient in tailing are as follows: SiO₂For 65%, Al₂O₃For 18%, Fe₂O₃For 3%, CaO 3%, MgO is 1%, remaining is other elements；The tailing plasticity index is 18,2.5 MJ/kg of calorific value.Tailing granularity < 0.1mm, grain Degree < 0.043mm's accounts for 85%.Loss on ignition is 6% after tailing and slate flour, stalk powder proportion.

The light porous fired brick the preparation method is as follows:

Step 7: adobe, which enters tunnel oven by process, successively dries, preheats, roasts；Drying temperature is 100~200 DEG C, preheating temperature It is 300~500 DEG C, maturing temperature control is 40 hours in 850~1050 DEG C, calcining time；Kiln discharge after fired brick successively cools down, Obtain light porous fired brick, sintering qualified rate 98%.

The comprehensive water absorption rate of prepared light porous fired brick reaches 46% or more, and apparent porosity reaches 41% or more, resists Compressive Strength is 10.85MPa.The equally distributed micropore of certain amount is formd inside burned brick green body.Micropore prepared by the present invention The shrinking percentage of Lightweight clinker brick is not more than 1.6%.

Above-described embodiment is only used to illustrate the technical scheme of the present invention, rather than its limitations.The invention is not limited to upper Face has been described and the accurate structural illustrated in the accompanying drawings is, and it cannot be said that specific implementation of the invention is only limited to these instructions. For those of ordinary skill in the art to which the present invention belongs, without departing from the inventive concept of the premise, that makes is each Kind change and modification, all shall be regarded as belonging to protection scope of the present invention.

Claims

1. a kind of light porous fired brick, it is characterised in that: the light porous baked brick raw materials are by tailing, slate flour, straw Stalk powder constituent；The tailing mass percent is 70~80%, and slate flour mass percent is 10~15%, stalk powder matter Amount percentage is 10-15%；The tailing after the sorted equipment sorting of coal slime by directly obtaining, the quality hundred of each ingredient in tailing Divide ratio are as follows: SiO₂For 45~65%, Al₂O₃For 18~25%, Fe₂O₃For 3~5%, CaO be 3~5%, MgO is 1~3%, remaining is it His element；The tailing plasticity index is 11~18,1.6~2.5 MJ/kg of calorific value；Tailing is matched with slate flour, stalk powder It is 6~10% than rear loss on ignition.

2. light porous fired brick according to claim 1, it is characterised in that: the tailing group is divided into 75%, slate flour For 13%, stalk powder 12%.

3. light porous fired brick according to claim 1, it is characterised in that: the quality percentage of each ingredient in the tailing Than are as follows: SiO₂For 55%, Al₂O₃For 20%, Fe₂O₃For 4%, CaO 4%, MgO 2%, remaining is other elements；The tailing plasticity Index is 15, calorific value 2.0MJ/kg；Loss on ignition is 8% after tailing and slate flour, stalk powder proportion.

4. any light porous fired brick according to claim 1~3, it is characterised in that: the moisture content of the tailing is 22~25%.

5. light porous fired brick according to claim 1, it is characterised in that: the screening installation is sorting column, described Sorting column includes the main at least two sorting cylinders for sorting cylinder (100) and being sequentially communicated with main sorting cylinder (100) (101,102), main sorting cylinder (100) and time sorting cylinder (101,102) include the mine of upper position in being provided at its inner portion Slurry multiple spot distributor (7) is arranged outside it and is filled with ore pulp multiple spot distributor (7) by the high speed disperser that pipeline is connected to Set (2), the foam capturing device (4) that is arranged at the top of it, the atomizing sprayer (5) being arranged on foam capturing device (4), Several microvesicle generators (10) are set around its underpart outer wall position, are circumferentially positioned at its outside and by pipeline and microvesicle The tailing overflow discharge nozzle (11) being connected to outside it with its bottom is arranged in the conveying tracheae (9) of generator (10) connection；It is described High speed disperser (2) includes that the motor (22) being arranged in outside it and the dispersion being provided at its inner portion connecting with motor (22) turn Piece (23)；The pipeline of the tailing overflow discharge nozzle (11) and high speed disperser device (2) is equipped with regulating valve (111)；It is described Conveying tracheae (9) is sequentially connected by pipeline with air accumulator (8) and air compressor (81)；It is provided on the air accumulator (8) Pressure maintaining valve and barometric damper；The main sorting cylinder (100) further includes being arranged outside it and by pipeline and high speed point Dissipate the ore pulp reaction chamber (1) and feeding inlet (103) that machine device (2) are sequentially communicated；Pipe before the ore pulp multiple spot distributor (7) Road is equipped with dehvery pump (3)；The dosing mouth (61) and tonic mouth (62) are connected to medicine-chest (6) by pipeline；The ore pulp Reaction chamber (1) includes setting in the internal stirring rotor (112) of ore pulp reaction chamber (1) and falls plate (113)；The ore pulp reaction Case (1) and the pipeline of feeding inlet (103) are equipped with dosing mouth (61)；The tailing overflow discharge nozzle of main sorting cylinder (100) (11) it is connected to the high speed disperser device (2) of sequentially connected sorting cylinder (101) by pipeline, described sorting cylinder (101) the high speed disperser device (2) of tailing overflow discharge nozzle (11) and sequentially connected sorting cylinder (102) passes through pipe Tonic mouth (62) are equipped on road connection, the tailing overflow discharge nozzle (11) and the pipeline of high speed disperser device (2)；It is described The tailing overflow discharge nozzle (11) of sequentially connected the last one sorting cylinder (102) is equipped with discharge gate (105)；The master Sorting cylinder (100) be connected to the foam capturing device (4) for the secondary sorting cylinder (101,102) being sequentially communicated by pipeline and Discharge port (104) are equipped on the pipeline.

6. light porous fired brick according to claim 4, it is characterised in that: the preparation side of the light porous fired brick Method is using complete interior thermal sintering, comprising the following steps:

Step 1: being 15~18% by tailing drying to moisture content；

Step 2: shale being broken for slate flour, screen size is < 2mm；

Step 6: adobe block is subjected to preliminarily dried；

7. the preparation method of light porous fired brick according to claim 6, it is characterised in that: stirred in the step 4 System is made of sequentially connected first stirring system and the second stirring system；The mixing speed of first stirring system is 100~300r/min, preferably 200~220r/min；The mixing speed of second stirring system is 300~600r/min, excellent It is selected as 450~480r/min；Mixing time is from entering to expect nature discharging time.

8. the preparation method of light porous fired brick according to claim 6, it is characterised in that: extruder in step 5 Extrusion pressure is 3-10MPa, preferably 4.00MPa, and vacuum degree is 0.07~0.09MPa.

9. the preparation method of fired brick according to claim 6, it is characterised in that: preliminarily dried described in step 6 is preferred It is dried for natural air drying or using residual heat of tunnel kiln.

10. the preparation method of light porous fired brick according to claim 6, it is characterised in that: maturing temperature in step 7 It is 40~48 hours for 850~1050 DEG C, calcining time.