CN109721335A

CN109721335A - A kind of fired brick and preparation method thereof

Info

Publication number: CN109721335A
Application number: CN201910194268.6A
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: 2019-05-07

Abstract

The invention belongs to materials for wall production fields, and in particular to a kind of fired brick and preparation method thereof.The baked brick raw materials are made of tailing and shale；The tailing mass percent is 70~90%, and the shale mass percent is 10~30%；The tailing directly obtains after being sorted again by the sorted equipment of coal slime, 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 11~15,1.8~2.5 MJ/kg of calorific value.Thermal sintering standard brick, has both saved the energy, performance accords with or surpasses national standard again, realizes the recycling of coal slime tailing and shale in complete.The preparation method simple process of the fired brick, is greatly saved time cost.

Description

A kind of fired brick and preparation method thereof

Technical field

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

Background technique

Coal slime is one of current maximum solid waste of China's discharge amount, and coal slime resource reutilization is China based on coal Energy resource structure inevitable choice and the Implement of sustainable development strategy one of important measures.The selected amount of the annual raw coal in China About 2,400,000,000 tons, the slime content of generation is at 2~300,000,000 tons.

Coal slime is the mineral compositions such as kaolin, dunn bass, clay, coal, and passes through multiple flotation, immersion, stirring, pressure Filter, makes coal mutually adsorb complete argillization with mud and is difficult to work with.Currently, a part of coal slime generates electricity for power plant or coal-refuse fragment dimension, A part of coal slime repeats to use existing equipment and technique is exhausted a blanking method and has recycled part coal, but tailings ash content is still 50~60%, calorific value is in 7~8MJ/kg.These tailings generate electricity for power plant or Gangue Power Plant, and calorific value is too low can not be directly sharp With；Air storage pollutes the environment, and landfill waste of resource again, has been more than 4 times of brickmaking requirement, existing skill for brick field its calorific value Art is often using coal slime as brickmaking auxiliary additive, and accounting is no more than 30%, and existing a large amount of coal slimes can not scale utilization.

China has been prohibited or has limited using full clay, shale as baked brick raw materials, mostly use at present flyash, gangue or It mixes and produces fired brick with clay, shale etc..But flyash, coal gangue baked brick quality weight, easy scum, lime blowing, resist evil mind Weathering is weak, compression strength is low, the performance of insulation is poor, and therefore, good raw material is the key that fired brick avoids defect.

Chinese literature " application that coal slime production floatation clean coal and tailing inferior develop hollow brick " discloses bad with high ash content Matter coal is that raw material produces qualified thermal coal, while brief introduction is that raw material is given birth to using the ash coal body refuse that coal slime flotation inferior is discharged Produce the industrial application of sintered hollow block.The coal slime slag ash content of sintered hollow block described in document is 59.48%, even if mixing spoil, In addition the calorific value of spoil itself, calorific value should be in the kilocalorie of 7.8~8.3MJ/kg(1800~2000) between, and it is suitble to fired brick Calorific value in 2.5 MJ/kg hereinafter, its coal slime slag calorific value has been more than 4 times of brickmaking requirement, cause largely to shrink in calcination process, Cause the deformation of feed height, brick body deformation occurs and collapses.It is difficult to be sintered out fired brick that meet national standards.Therefore, it separates Combustible coal in coal slime out makes calorific value be reduced to 2.5MJ/kg hereinafter, adding shale using coal slime tailing, can be preparation Fired brick provides new raw material approach.

Summary of the invention

For technical problem of the existing technology, the present invention provides a kind of fired bricks to match using tailing as primary raw material With shale, the effective use of waste is effectively realized, while reducing energy waste.The tailing and shale cooperate, Ke Yiquan Interior thermal sintering goes out good fired brick, has both saved the energy, and performance accords with or surpasses national standard again.Specifically, this hair Bright technical solution are as follows:

A kind of fired brick, the baked brick raw materials are made of tailing and shale；The tailing mass percent is 70~90%, institute Stating shale mass percent is 10~30%；The tailing after the sorted equipment sorting of coal slime by directly obtaining, each ingredient in tailing Mass percent 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 11~15,1.8~2.5MJ/kg of calorific value, and tailing is mixed with shale Loss on ignition is 6~10%.

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 13, and calorific value is 2.0 MJ/kg.

Further, the tailing mass percent is 80~90%, and the shale mass percent is 10~20%.

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

Further, the screening installation is sorting column, and the sorting column includes a main sorting cylinder 100 and divides with main Select at least two sorting cylinders 101,102 that cylinder 100 is sequentially communicated, main sorting cylinder 100 and time sorting cylinder 101,102 Include the ore pulp multiple spot distributor 7 of upper position in being provided at its inner portion, be arranged outside it and with ore pulp multiple spot distributor 7 By the high speed disperser device 2 of pipeline connection, the foam capturing device 4 being arranged at the top of it, it is arranged in foam capturing device 4 On atomizing sprayer 5, several microvesicle generators 10 are set, are circumferentially positioned at outside it simultaneously around its underpart outer wall positions And be connected to microvesicle generators 10 by pipeline conveying tracheae 9, the tailing overflow being connected to outside it with its bottom be set Expects pipe 11；The high speed disperser 2 includes the motor 22 outside it being arranged in and being provided at its inner portion of connecting with motor 22 Disperse rotor 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 defeated Snorkel 9 is sequentially connected by pipeline with air accumulator 8 and air compressor 81；It is gentle that pressure maintaining valve is provided on the air accumulator 8 Flow regulating valve；The main sorting cylinder 100 further includes being arranged outside it and passing through pipeline and high speed disperser device 2 successively The ore pulp reaction chamber 1 and feeding inlet 103 of connection；Pipeline before the ore pulp multiple spot distributor 7 is equipped with dehvery pump 3；It is described Dosing mouth 61 and tonic mouth 62 are connected to medicine-chest 6 by pipeline；The ore pulp reaction chamber 1 includes being arranged in ore pulp reaction chamber 1 Internal stirring rotor 112 and fall plate 113；The ore pulp reaction chamber 1 and the pipeline of feeding inlet 103 are equipped with dosing mouth 61； The tailing overflow discharge nozzle 11 of the main sorting cylinder 100 and the high speed disperser device 2 of sequentially connected sorting cylinder 101 It is connected to by pipeline, the tailing overflow discharge nozzle 11 and the sequentially connected secondary height for sorting cylinder 102 of described sorting cylinder 101 Fast dispersion machine device 2 is connected to by pipeline, is equipped on the tailing overflow discharge nozzle 11 and the pipeline of high speed disperser device 2 Tonic mouth 62；The tailing overflow discharge nozzle 11 of sequentially connected the last one the sorting cylinder 102 is equipped with discharge gate 105；The 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.

Further, the preparation method of the fired brick is thermal sintering in complete, comprising the following steps:

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

Step 2: shale being crushed by compound crusher, rotary screen sieving obtains the powder of partial size < 2mm；

Step 3: step 2 gained shale being mixed in proportion with step 1 gained tailing, stirring system stirring is delivered to, rolls；

Step 4: step 3 obtained solid being sequentially input into vacuum-extruder extrusion, automatic strip-cutting machine slitting, blank cutter stripping and slicing, is obtained Adobe block；

Step 5: adobe block is subjected to preliminarily dried；

Step 6: adobe, which enters tunnel oven by process, successively dries, preheats, roasts, and obtains fired brick.

Further, stirring system is made of sequentially connected first stirring system and the second stirring system in step 3；Institute The mixing speed for stating the first stirring system is 100~300r/min；The mixing speed of second stirring system is 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, step 4 in extruder extrusion pressure be 3-10MPa, vacuum degree be 0.07~0.09MPa, base 205~110kg/cm of body compression strength.

Further, step 4 in extruder extrusion pressure be 4.00MPa.

Further, preliminarily dried described in step 5 is preferably natural air drying or is dried using residual heat of tunnel kiln.

Further, maturing temperature is 850~1050 DEG C in step 6, calcining time is 40~48 hours.

Fired brick of the present invention and preparation method are compared to be had the advantages that with the prior art

Fired brick of the present invention: (1) pressure-proof and snap-resistent intensity is high, freeze proof, sound-absorbing, anti-rotten, permeable, ventilative feature；(2) than passing System fired brick fine size, plasticity index are high by 25~36%.Tailing granularity is less than 0.045mm, and product is indeformable, forming, brick face light Clean, corner angle are clearly demarcated, good appearance；(3) its performance of the fired brick accords with or surpasses national standard.(4) brick body weight saving 35% or more.

The preparation method of fired brick of the present invention: (1) the sorted column sorting of primary raw material obtains, and extends coal slime, page Rock comprehensively utilizes industrial chain, and " waste " is made to turn waste into wealth.(2) compared with conventional sintering brick, exempt to build raw material storage, without Cheng Huaku Deng.Process flow is simple, production capacity is big, low production cost, energy conservation and environmental protection.(3) exempt to be crushed, burden process, feedstock transportation, Civil engineering etc. reduces production cost, energy conservation and environmental protection.(4) tailing raw material can feed brickmaking vehicle through the direct seamless interfacing of coal slime tailing Between, no raw material handling, transportation cost reduce the pollution to environment.(5) stablize than conventional sintering brick calorific value, sintering time contracting It is short by 30% or more.Sintering is fast, yield is high, at low cost, energy conservation and environmental protection.

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.

The ingredient percent of shalification used in the present invention are as follows: SiO₂For 34~65%, A1₂O₃Account for 16~35%, Fe₂O₃ It is 0.4~16% for 1.5~16%, CaO, remaining is other elements.Shale moisture content is 3~5%, and calorific value is not more than 1.3MJ/kg.

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 wheel 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 gate 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%, 1.8~2.5MJ/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%, 1.8~2.5MJ/ 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 11~15；Fever Amount is 1.8~2.5MJ/Kg, and moisture content is 22~25%；Tailing and the mixed loss on ignition of shale are 6~10%.Prepared burning It ties brick shrinking percentage and is not more than 1.6%.

Embodiment 1: the preparation method of standard brick

The baked brick raw materials are made of tailing and shale；The tailing mass percent is 70%, the shale mass percent It is 30%；The tailing after the sorted column sorting of coal slime by directly obtaining, the mass percent of each ingredient in tailing are as follows: SiO₂For 45%、Al₂O₃For 257%, Fe₂O₃For 5%, CaO 5%, MgO 3%, remaining is other elements；The tailing plasticity index is 11, 1.8 MJ/kg of calorific value.Tailing granularity < 0.045mm.The powder of shale granularity < 2mm.

The 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,；

Step 3: step 2 gained shale being mixed in proportion with step 1 gained tailing, is successively delivered to two continuous models The first, second stirring system stirring of SJJ280 × 36 rolls；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, preferably 450~480r/ min；Mixing time is from entering to expect nature discharging time.

Step 4: step 3 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；Extrusion pressure is 3-10MPa, preferably For 4.00MPa, vacuum degree is 0.07~0.09MPa, 205~110kg/cm of green body compression strength.

Step 5: 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 6: 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 standard brick, sintering qualified rate 98%.

Standard brick prepared by the present invention has reached GB5101-2003 " fired common brick ", GB/T2542-2003 " wall-building brick Test method " high-class product in standard.

Embodiment 2: the preparation method of standard brick

The fired brick is standard brick, and the baked brick raw materials are made of tailing and shale；The tailing mass percent is 80%, the shale mass percent is 20%；The tailing after the sorted column sorting of coal slime by directly obtaining, each ingredient in tailing Mass percent are as follows: SiO₂For 55%, Al₂O₃For 20%, Fe₂O₃For 4%, CaO 4%, MgO 2%, remaining is other elements；Institute Stating tailing plasticity index is 13,2.0 MJ/kg of calorific value, and tailing and the mixed loss on ignition of shale are 6~10%.Tailing granularity < 0.045mm.The powder of shale granularity < 2mm.

The standard brick the preparation method is as follows:

Step 3: step 2 gained shale being mixed in proportion with step 1 gained tailing, is successively delivered to two continuous models The first, second stirring system stirring of SJJ280 × 36 rolls；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, preferably 450~480r/ min；Mixing time is from entering to expect nature discharging time.Described first, second is in the order of connection to stirring system progress Difference description, without other specific meanings.

Step 6: 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 standard brick, sintering qualified rate 98%.

Embodiment 3: the preparation method of standard brick

The fired brick is standard brick, and the baked brick raw materials are made of tailing and shale；The tailing mass percent is 90%, the shale mass percent is 10%；The tailing after the sorted column sorting of coal slime by directly obtaining, each ingredient in tailing Mass percent are as follows: SiO₂For 65%, Al₂O₃For 18%, Fe₂O₃For 3%, CaO 3%, MgO 1%, remaining is other elements；Institute Stating tailing plasticity index is 15, calorific value 2.5MJ/kg.Tailing granularity < 0.045mm.Shale granularity < 2mm.

The standard brick the preparation method is as follows:

Step 3: step 2 gained shale being mixed in proportion with step 1 gained tailing, is 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.Described first, second area to be carried out in the order of connection to stirring system It does not describe, without other specific meanings.

Step 6: 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 standard brick, sintering qualified rate 98%.

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 fired brick, it is characterised in that: the baked brick raw materials are made of tailing and shale；The tailing mass percent It is 70~90%, the shale mass percent is 10~30%；The tailing directly obtains after being sorted by the sorted equipment of coal slime, 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 11~15,1.8~2.5 MJ/kg of calorific value, tailing It is 6~10% with the mixed loss on ignition of shale.

2. fired brick according to claim 1, it is characterised in that: the mass percent of each ingredient in the tailing are as follows: SiO₂ For 55%, Al₂O₃For 20%, Fe₂O₃For 4%, CaO 4%, MgO 2%, remaining is other elements；The tailing plasticity index is 13, calorific value is 2.0 MJ/kg.

3. fired brick according to claim 1, it is characterised in that: the tailing mass percent is 80~90%, the page Rock mass percent is 10~20%.

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

5. fired brick according to claim 1, it is characterised in that: the screening installation is sorting column, the sorting column packet Include one it is main sorting cylinder (100) and with it is main sorting cylinder (100) be sequentially communicated at least two sorting cylinders (101, 102), main sorting cylinder (100) and time sorting cylinder (101,102) include the ore pulp multiple spot of upper position in being provided at its inner portion Distributor (7), the high speed disperser device (2) for being arranged outside it and being connected to by pipeline with ore pulp multiple spot distributor (7), Foam capturing device (4) at the top of it, the atomizing sprayer (5) being arranged on foam capturing device (4) are set, around it Lower part outer wall position is arranged several microvesicle generators (10), is circumferentially positioned at its outside and by pipeline and microvesicle generators (10) be connected to conveying tracheae (9), the tailing overflow discharge nozzle (11) being connected to outside it with its bottom is set；The high speed point Dissipating machine (2) includes the motor (22) being arranged in outside it and the dispersion rotor being provided at its inner portion connecting with motor (22) (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 defeated Snorkel (9) is sequentially connected by pipeline with air accumulator (8) and air compressor (81)；It is provided on the air accumulator (8) steady Pressure valve and barometric damper；The main sorting cylinder (100) further includes being arranged outside it and by pipeline and high speed dispersion The ore pulp reaction chamber (1) and feeding inlet (103) that machine device (2) is sequentially communicated；Pipeline before the ore pulp multiple spot distributor (7) It 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 is anti- Case (1) is answered to include setting in the internal stirring rotor (112) of ore pulp reaction chamber (1) and fall plate (113)；The ore pulp reaction chamber (1) dosing mouth (61) are equipped with the pipeline of feeding inlet (103)；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. fired brick according to claim 4, it is characterised in that: the preparation method of the fired brick is burnt using complete interior heat Knot, comprising the following steps:

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

Step 5: adobe block is subjected to preliminarily dried；

7. the preparation method of fired brick according to claim 6, it is characterised in that: stirring system is by successively connecting in step 3 The first stirring system connect and the second stirring system are constituted；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, preferably 450~480r/ min；Mixing time is from entering to expect nature discharging time.

8. the preparation method of fired brick according to claim 6, it is characterised in that: step 4 in extruder extrusion pressure Power is 3-10MPa, preferably 4.00MPa, and vacuum degree is 0.07~0.09MPa, 205~110kg/cm of green body compression strength.

9. the preparation method of fired brick according to claim 6, it is characterised in that: preliminarily dried described in step 5 is preferred It is dried for natural air drying or using residual heat of tunnel kiln.

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