CN109650429A - A kind of carbide slag recycling treatment process - Google Patents
A kind of carbide slag recycling treatment process Download PDFInfo
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- CN109650429A CN109650429A CN201910127692.9A CN201910127692A CN109650429A CN 109650429 A CN109650429 A CN 109650429A CN 201910127692 A CN201910127692 A CN 201910127692A CN 109650429 A CN109650429 A CN 109650429A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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- C01P2006/80—Compositional purity
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Abstract
The present invention relates to technical field of coal chemical industry, especially a kind of carbide slag recycling treatment process, step 1) pretreatment；Step 2 sieve；Step 3) cyclonic separation；Step 4) purification；Step 5) filters pressing；Step 6) drying；Step 7) cyclonic separation；The calcining of step 8) two-stage；Step 9) pressure ball；Step 10) screening packaging.The present invention is efficiently separated by can be carried out to the impurity in carbide slag, it is needed that carbide slag can be flexibly made to calcium hydroxide or calcium oxide according to market, it can be suitably used for industrial mass continuous production, energy-output ratio is small, have a wide range of application, calcium hydroxide or calcium oxide product purity obtained is high, and activity is excellent, realizes refuse reclamation.
Description
Technical field
The present invention relates to technical field of coal chemical industry, especially a kind of carbide slag recycling treatment process.
Background technique
Carbide slag is mainly derived from the production of the chemical products such as polyvinyl chloride (PVC), acetylene, polyvinyl alcohol, belongs to II class one
As industrial solid wastes, PVC produce and make steel industry in it is common, main constituents account for 70%- based on Ca (OH) 2
80%, there are also MgO, Fe for other constituents2O3、SiO2、Al2O3Deng.Since carbide slag fineness is big, pollution air is easily drifted, alkalinity
Greatly, corrosivity is strong, easily contaminated soil and underground water, and carbide slag has become the serious problems that environmentally friendly fixed-end forces face now.
The main method of the comprehensive utilization of carbide slag is for producing cement at present, and CN201510978157.6 discloses one
Kind of dry, wet carbide slag shares the device and method of cement processed, and it using carbide slag is original that CN201410577489.9, which is disclosed a kind of,
The method for expecting the clinker of calcining, improves Cement Quality using the method for blending, but do not remove the impurity of carbide slag, shadow
Lime quality is rung.In addition to being used to produce cement, carbide slag can be used as sulphur dioxide absorbent, such as de- used in power-plant flue gas
During sulphur dust separation；In terms of sewage treatment, carbide slag has in coal-washing wastewater treatment, high fluorine waste water, strong acid waste water
Good application effect, but dosage is limited, and the considerations of for transportation cost, affects the consumption amount of carbide slag.Patent
CN200810068715.5, CN200910041209.1 disclose the method that carbide slag prepares calcium carbonate superfine powder, but production process
Complicated, at high cost, industrialization difficulty is larger.
Carbide slag realizes that comprehensive utilization just has to the separation of processing impurity and reduces the contradiction between cost.
CN103288116A discloses a kind of method for preparing high-purity calcium hydroxide using carbide slag, proposes and utilizes hydrocyclone separation technology
Method separates the impurity in carbide slag, separates impurity in series and parallel using the hydrocyclone of different-diameter, and effect is preferable, but should
Method influences the factor of hydrocyclone impurity-eliminating effect in addition to diameter also in the pilot scale stage, there are also cone angle,
Operating pressure, material inlet and overflow bore etc..
Summary of the invention
The purpose of the present invention is to provide a kind of carbide slag recycling treatment process, by can be into the impurity in carbide slag
Row efficiently separates, and is needed that carbide slag can be flexibly made to calcium hydroxide or calcium oxide according to market, can be suitably used for industrial mass
Continuous production is measured, energy-output ratio is small, has a wide range of application.
The object of the present invention is achieved like this: a kind of carbide slag recycling treatment process, step 1) pretreatment: makes calcium carbide
Ground-slag end is mixed with water, is configured to the carbide slag suspension of carbide slag solid content 10%-20% and is stirred for uniformly, stirring turns
Fast 200-400r/min, mixing time 15-20min；Step 2 sieve: agitated uniform carbide slag suspension is passed through
After 18-80 mesh net filtration, the prefabricated slurries of carbide slag are formed；Step 3) cyclonic separation: the carbide slag through the screen to filtrate is prefabricated
After slurries inject hydraulic solid-liquid two phase separator, cyclonic separation is carried out to it by hydraulic solid-liquid two phase separator；Step 4) purification:
The primary slurries that hydrocyclone overflow port is flowed out introduce treatment tank, and to add complexing agent and reduction in treatment tank
The mode for stirring evenly slurries, complexing agent and reducing agent after agent is to purification, the respective opposing primary slurries of complexing agent and reducing agent
Specific gravity using added with as the complexing agent of adjuvant and the carbide slag slurry pH value of reducing agent reaching 9-11.5, speed of agitator
100-200r/min, mixing time 5-10min；Step 5) filters pressing: by make purification primary slurries by plate-frame filtering in a manner of
Filters pressing forms carbide slag mud cake and controls carbide slag mud cake water content≤30%；Step 6) drying: to the carbide slag mud through filters pressing
Cake carries out drying up to its water content≤5% and is decomposed into deformed calcium hydroxide powder, and 200-500 DEG C of drying temperature；Step
It 7) will be through carrying out quantitative weighing packaging to drying calcium hydroxide powder.
Step 1) pretreatment: a kind of carbide slag recycling treatment process mixes carbide slag powder with water, is configured to calcium carbide
The carbide slag suspension of slag solid content 10%-20% is simultaneously stirred for uniformly, speed of agitator 200-400r/min, mixing time
15-20min；Step 2 sieve: by agitated uniform carbide slag suspension by being formed after 18-80 mesh net filtration
The prefabricated slurries of carbide slag；Step 3) cyclonic separation: the prefabricated slurries injection hydraulic solid-liquid two-phase point of carbide slag through the screen to filtrate
After device, cyclonic separation is carried out to it by hydraulic solid-liquid two phase separator；Step 4) purification: by hydrocyclone overflow port
The primary slurries of outflow introduce treatment tank, and added slurries, complexing agent and also after complexing agent and reducing agent in treatment tank
The mode that former agent stirs evenly is to purification, and the specific gravity of the respective opposing primary slurries of complexing agent and reducing agent is added with as adjuvant
Complexing agent and the carbide slag slurry pH value of reducing agent reach subject to 9-11.5, speed of agitator 100-200r/min, mixing time
5-10min；Step 5) filters pressing: by make purification primary slurries by plate-frame filtering in a manner of filters pressing, formed carbide slag mud cake simultaneously
Control carbide slag mud cake water content≤30%；Step 6) drying: drying is carried out to the carbide slag mud cake through filters pressing until its water content
≤ 5% and it is decomposed into deformed calcium hydroxide powder, 200-500 DEG C of drying temperature；Step 7) cyclonic separation: by drying
Calcium hydroxide powder is sent into cyclone separator, removes the biggish gravel of specific gravity contained by calcium hydroxide powder by cyclone separator
With grit and through collecting the disengaging gravel being discharged from cyclone separator and grit and the lesser calcium hydroxide powder of specific gravity；Step 8)
Two-stage calcining: calcium hydroxide powder is sent into kiln calcining immediately, calcine technology is implemented to it, passes through calcium hydroxide powder successively
Level-one calcining and second level calcine and generate lime powder: 500-800 DEG C of level-one calcination temperature and calcination time 60min-
120min, 800-1000 DEG C of second level calcination temperature and calcination time 120min-180min；Step 9) pressure ball: it will be calcined through two-stage
And the lime powder generated is cooled to 100-150 DEG C and is wherein adding the neutrality that the specific gravity of opposite lime powder is 0.1%
It is sent into ball press after binder, makes it successively by pressurizeing twice and being pressed balling-up, first time moulding pressure 5-10Mpa, the
Secondary pressurized pressure 15-20Mpa；Step 10) screening packaging: it will be compressed into and rejected in spherical oxidation calcospherite by screening
It is therein in after spherical calcium oxide block, quantitative weighing packaging is carried out to carbide slag sphere.
The present invention has mainly obtained the following two kinds product:
(1) calcium hydroxide product
The high-quality calcium hydroxide falls large granular impurity, then specially designed hydrocyclone (water through sieve first
Power solid-liquid two phase separator (ZL201110307534.5)) remove nearly 85% impurity, through purification further removing slurry in
Mg2+、A13+、Fe3+Plasma, then finished product is made through filters pressing drying, which reaches
National chemical industry standard " industrial calcium hydroxide " HG/T4120-2009.
(2) calcium product is aoxidized
The calcium oxide, by efficient rotary point, is further removed in carbide slag on the basis of high-quality calcium hydroxide production
Gravel and dust, purity is higher, meanwhile, by reducing calcination temperature, shortening calcination time, improve final oxidation calcium product
Activity improves the balling ratio of oxidation calcium product by secondary ball press technique, and qualification rate is with the obvious advantage, and can directly substitute calcium carbide makes
With.
The present invention is compared with existing carbide slag recycling treatment process, technological merit and uniqueness are as follows: (1) present invention is excellent
Change traditional hydrocyclone, i.e., using granted patent product-hydraulic solid-liquid two phase separator
(ZL201110307534.5), increase current stabilization rotation excessive plate on the basis of conventional hydraulic cyclone separator and gill formula is separated by filtration
Device improves the impurity separating effect of conventional hydraulic cyclone separator；It is upper in the cylindrical tube body of hydraulic solid-liquid two phase separator
Portion, which is provided with, revolves the plate that overflows in tabular and inclined current stabilization, and the excessive plate of current stabilization rotation is inclined, hydraulic solid-liquid two phase separator
Middle part in cylindrical tube body is uniformly fitted with gill formula filter separator, and each gill formula filter separator is by cube tubular box
It is formed with branchial plate, cheek piece is separately uniformly distributed and parallel each other；Correlator in the hydraulic solid-liquid two phase separator that the present invention uses
The size of part are as follows: cylindrical tube interior diameter is 1-1.5m, and sand discharge funnel is 15-25 ° in inverted conical shape and its cone angle, current stabilization rotation
The angle of plate and horizontal plane of overflowing is 1 °≤λ≤5 °, and it is 150-200mm that interior swirling flow, which rises water drum interior diameter, cheek piece with a thickness of 2-3mm,
Spacing between adjacent two cheeks piece is 15-25cm；When the invention works, being given by the water inlet pipe of hydraulic solid-liquid two phase separator
Its internal work water pressure pressure applied is 0.15-0.3MPa；(2) it is used the step of calcium hydroxide reduction-oxidation calcium in the present invention
Second level calcining, reduces calcination temperature, shortens calcination time, improves the calcium oxide performance of generation, reduces energy consumption, reduce at
This；(3) present invention is reduced in calcination process compared with calcine technology after first pressure ball using the manufacture craft of pressure ball after first calcining
The loss of quick-fried ball, and the present invention uses secondary ball press technique, and balling ratio greatly improves, and broken ball is substantially not present (in spherical
Irregular block), balling-up intensity is high, further ensures that oxidation calcospherite is non-friable, establishes for calcium oxide as calcium carbide reproduction
Fixed basis；(4) present invention is suitable for industrial mass continuous production, can be needed that carbide slag is selected to produce hydroxide according to market
Calcium or calcium oxide, the calcium hydroxide purity recycled can reach 85% or more, and the calcium oxide purity of production can reach 90% or more, oxygen
It is excellent to change calcium activity, can realize waste utilization directly as the raw materials for production of calcium carbide.
The present invention can carry out resource utilization to carbide slag, be efficiently separated by can be carried out to the impurity in carbide slag, root
It needs that carbide slag can be flexibly made to calcium hydroxide or calcium oxide according to market, can be suitably used for industrial mass continuous production, energy
Source consumption is small, has a wide range of application, and calcium hydroxide or calcium oxide product purity obtained is high, and activity is excellent, realizes refuse reclamation.
Specific embodiment
Step 1) pretreatment: a kind of carbide slag recycling treatment process mixes carbide slag powder with water, is configured to calcium carbide
The carbide slag suspension of slag solid content 10%-20% is simultaneously stirred for uniformly, speed of agitator 200-400r/min, mixing time
15-20min；Step 2 sieve: agitated uniform carbide slag suspension is passed through into 18-80 mesh (0.1-0.2 μm) sieve
After filtering, the prefabricated slurries of carbide slag are formed；Step 3) cyclonic separation: the prefabricated slurries of carbide slag through the screen to filtrate are injected waterpower
After solid-liquid two phase separator, cyclonic separation is carried out to it by hydraulic solid-liquid two phase separator；Step 4) purification: by hydraulic cyclone point
Primary slurries from the outflow of device overflow port introduce treatment tank, and with added in treatment tank after complexing agent and reducing agent by slurries,
The mode that complexing agent and reducing agent stir evenly is to purification, and the specific gravity of the respective opposing primary slurries of complexing agent and reducing agent is to add
Have and reaches subject to 9-11.5 as the complexing agent of adjuvant and the carbide slag slurry pH value of reducing agent, speed of agitator 100-200r/
Min, mixing time 5-10min；Step 5) filters pressing: by make purification primary slurries by plate-frame filtering in a manner of filters pressing, formed
Carbide slag mud cake simultaneously controls carbide slag mud cake water content≤30%；Step 6) drying: the carbide slag mud cake through filters pressing is dried
Up to its water content≤5% and it is decomposed into deformed calcium hydroxide powder, 200-500 DEG C of drying temperature；Step 7) will be through to baking
Dry hydrogen lime powder carries out quantitative weighing packaging.
Step 1) pretreatment: a kind of carbide slag recycling treatment process mixes carbide slag powder with water, is configured to calcium carbide
The carbide slag suspension of slag solid content 10%-20% is simultaneously stirred for uniformly, speed of agitator 200-400r/min, mixing time
15-20min；Step 2 sieve: agitated uniform carbide slag suspension is passed through into 18-80 mesh (0.1-0.2 μm) sieve
After filtering, the prefabricated slurries of carbide slag are formed；Step 3) cyclonic separation: the prefabricated slurries of carbide slag through the screen to filtrate are injected waterpower
After solid-liquid two phase separator, cyclonic separation is carried out to it by hydraulic solid-liquid two phase separator；Step 4) purification: by hydraulic cyclone point
Primary slurries from the outflow of device overflow port introduce treatment tank, and with added in treatment tank after complexing agent and reducing agent by slurries,
The mode that complexing agent and reducing agent stir evenly is to purification, and the specific gravity of the respective opposing primary slurries of complexing agent and reducing agent is to add
Have and reaches subject to 9-11.5 as the complexing agent of adjuvant and the carbide slag slurry pH value of reducing agent, speed of agitator 100-200r/
Min, mixing time 5-10min；Step 5) filters pressing: by make purification primary slurries by plate-frame filtering in a manner of filters pressing, formed
Carbide slag mud cake simultaneously controls carbide slag mud cake water content≤30%；Step 6) drying: the carbide slag mud cake through filters pressing is dried
Up to its water content≤5% and it is decomposed into deformed calcium hydroxide powder, 200-500 DEG C of drying temperature；Step 7) whirlwind point
From: the calcium hydroxide powder of drying is sent into cyclone separator, is removed contained by calcium hydroxide powder by cyclone separator
The biggish gravel of specific gravity and grit and through collecting the disengaging gravel and grit and the lesser hydrogen-oxygen of specific gravity that are discharged from cyclone separator
Change calcium powder；The calcining of step 8) two-stage: calcium hydroxide powder is sent into kiln calcining immediately, calcine technology is implemented to it, makes hydrogen
Lime powder is successively calcined through level-one calcining and second level and generates lime powder: 500-800 DEG C of level-one calcination temperature and forging
Burn time 60min-120min, 800-1000 DEG C of second level calcination temperature and calcination time 120min-180min；Step 9) pressure ball:
The lime powder calcined and generated through two-stage is cooled to 100-150 DEG C and in the specific gravity for wherein adding opposite lime powder
To be sent into ball press after 0.1% neutral binder, make it successively by pressurizeing twice and being pressed balling-up, for the first time pressurization pressure
Power 5-10Mpa, second of moulding pressure 15-20Mpa；Step 10) screening packaging: it will be compressed into spherical oxidation calcospherite
It is therein in after spherical calcium oxide block by screening rejecting, quantitative weighing packaging is carried out to carbide slag sphere.
The embodiment of the present invention 1
A kind of carbide slag recycling treatment process, the technique is the following steps are included: step 1) pre-processes: carbide slag and water are mixed
It closes, is configured to the suspension of solid content 10% and stirs evenly, speed of agitator 200r/min, mixing time 15min.Step 2 sieve
Net coarse filtration: make unidirectionally to be passed through 18 mesh (0.1 μm) sieve by the carbide slag suspension that the step 1) stirs evenly, it is pre- to obtain carbide slag
Slurrying liquid.Step 3) cyclonic separation: the prefabricated slurries of carbide slag through the step 2 sieve are passed through hydraulic solid-liquid two-phase
Separator carries out cyclonic separation to it.The size of related device in hydraulic solid-liquid two phase separator are as follows: cylindrical tube diameter is
1.5m, sand discharge funnel cone angle are 15 °, and it is 200mm that interior swirling flow, which rises water drum interior diameter, passes through the water inlet of hydraulic solid-liquid two phase separator
The work water pressure pressure that pipe applies to its inside is 0.15MPa, and the angle that current stabilization revolves overflow plate and horizontal plane is 5 °, cheek piece with a thickness of
3mm, the spacing between adjacent two cheeks piece are 25cm.Step 4) purification: by hydrocyclone used by the step 3)
The primary slurries of overflow port outflow are passed through treatment tank, and complexing agent and reducing agent is added, and stir evenly in treatment tank mixed with complexing agent and also
The primary slurries of former agent simultaneously adjust its pH value to 10.2, speed of agitator 100r/min, mixing time 5min.Step 5) filters pressing: right
The carbide slag slurry refined through the step 4) carries out plate-frame filtering, it is made to form carbide slag mud cake, calcium carbide after plate-frame filtering
Water content≤25% of slag mud cake.Step 6) drying: drying the carbide slag mud cake through the step 5) filters pressing, drying temperature
300 DEG C of degree, is dried to its water content≤5%, is baked to after forming calcium hydroxide product, packs to its quantitative weighing.This implementation
Calcium hydroxide product purity obtained by example 1 reaches 92.8%, yield 85.7%.Calcium hydroxide product impurities ingredient and electricity
Rock ballast original slag phase compares, SiO2Percentage composition is down to 2.23%, Al2O3 percentage composition by 9.84% and is down to 0.62% by 3.24%,
Fe2O3 percentage composition is down to 0.83%, MgO percentage composition by 3.78% and is down to 0.20%, C percentage composition by 3.82% drop by 1.67%
To 1.54%, residual impurity content is 1.78%.
The embodiment of the present invention 2
A kind of carbide slag recycling treatment process, the technique the following steps are included:
Step 1) pretreatment: carbide slag is mixed with water, the suspension of solid content 15% is configured to and stirs evenly, speed of agitator
300r/min, mixing time 20min.Step 2 sieve: make the carbide slag suspension list stirred evenly by the step 1)
To by 80 mesh (0.2 μm) sieve, the prefabricated slurries of carbide slag are obtained.Step 3) cyclonic separation: will be through the step 2 sieve
The prefabricated slurries of carbide slag be passed through hydraulic solid-liquid two phase separator, cyclonic separation is carried out to it.In hydraulic solid-liquid two phase separator
The size of related device are as follows: cylindrical tube diameter is 1.5m, and sand discharge funnel cone angle is 15 °, and interior swirling flow rises water drum interior diameter and is
200mm, giving its internal work water pressure pressure applied by the water inlet pipe of hydraulic solid-liquid two phase separator is 0.15MPa, current stabilization
The angle for revolving overflow plate and horizontal plane is 5 °, and for cheek piece with a thickness of 3mm, the spacing between adjacent two cheeks piece is 20cm.Step 4) purification:
The primary slurries that hydrocyclone overflow port used by the step 3) flows out are passed through treatment tank, be added complexing agent and
Reducing agent stirs evenly in treatment tank mixed with the primary slurries of complexing agent and reducing agent and adjusts its pH value to 11, speed of agitator 200r/
Min, mixing time 10min.Step 5) filters pressing: plate-frame filtering is carried out to the carbide slag slurry refined through the step 4), makes it
Carbide slag mud cake, water content≤30% of carbide slag mud cake are formed after plate-frame filtering.Step 6) drying: to through the step 5)
The carbide slag mud cake of filters pressing is dried, and 500 DEG C of drying temperature, is dried to its water content≤5%.Step 7) cyclonic separation: will be through
Carbide slag powder (calcium hydroxide powder) after stating step 6) drying is sent into cyclone separator, removes the gravel in carbide slag powder
And dust, and collect the calcium hydroxide powder being discharged from cyclone separator.Step 8) two-stage calcining: immediately by calcium hydroxide powder
It to be sent into kiln calcining, level-one calcining, second level calcining are carried out to it, calcine technology is calcined using two-stage, and 800 DEG C of level-one calcination temperature
And calcination time 120min, 800 DEG C of second level calcination temperature and calcination time 120min.Step 9) pressure ball: will be through the step 8)
The lime powder that two-stage is calcined and generated is cooled to 100 DEG C and is sent into pressure ball after the wherein neutral binder of addition 0.1%
Machine is pressed balling-up and pressurizeing twice, first time pressure ball pressure 10Mpa, second of pressure ball pressure 20Mpa.Step 10) sieve
Subpackage dress: after screening by the oxidation calcospherite being pressed into through the step 9), rejecting therein is not in spherical calcium oxide block
Body (broken ball), to oxidation calcospherite quantitative weighing packaging.
Calcium oxide product purity obtained by the present embodiment 2 reaches 93.6%, yield 83.4%.
According to the various embodiments described above of the present invention, those skilled in the art are that full scope of the invention may be implemented completely
, realize process and the same the various embodiments described above of method；And non-elaborated part of the present invention belongs to techniques well known.
The above, part specific embodiment only of the present invention, but scope of protection of the present invention is not limited thereto, appoints
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, should all cover by what those skilled in the art
Within protection scope of the present invention.
Claims (2)
1. a kind of carbide slag recycling treatment process, it is characterised in that: step 1) pretreatment: mixing carbide slag powder with water,
It is configured to the carbide slag suspension of carbide slag solid content 10%-20% and is stirred for uniformly, speed of agitator 200-400r/min,
Mixing time 15-20min；Step 2 sieve: agitated uniform carbide slag suspension is passed through into 18-80 mesh net filtration
Afterwards, the prefabricated slurries of carbide slag are formed；Step 3) cyclonic separation: the prefabricated slurries of carbide slag through the screen to filtrate are injected hydraulic solid-liquid
After two phase separator, cyclonic separation is carried out to it by hydraulic solid-liquid two phase separator；Step 4) purification: by hydrocyclone
The primary slurries of overflow port outflow introduce treatment tank, and added slurries, complexing after complexing agent and reducing agent in treatment tank
The mode that agent and reducing agent stir evenly is to purification, and the specific gravity of the respective opposing primary slurries of complexing agent and reducing agent is with added with making
Reach subject to 9-11.5 for the complexing agent of adjuvant and the carbide slag slurry pH value of reducing agent, speed of agitator 100-200r/min is stirred
Mix time 5-10min；Step 5) filters pressing: by make purification primary slurries by plate-frame filtering in a manner of filters pressing, formed carbide slag
Mud cake simultaneously controls carbide slag mud cake water content≤30%；Step 6) drying: drying is carried out up to it to the carbide slag mud cake through filters pressing
Water content≤5% and it is decomposed into deformed calcium hydroxide powder, 200-500 DEG C of drying temperature；Step 7) will be through to drying hydrogen-oxygen
Change calcium powder and carries out quantitative weighing packaging.
2. a kind of carbide slag recycling treatment process, it is characterised in that: step 1) pretreatment: mixing carbide slag powder with water,
It is configured to the carbide slag suspension of carbide slag solid content 10%-20% and is stirred for uniformly, speed of agitator 200-400r/min,
Mixing time 15-20min；Step 2 sieve: agitated uniform carbide slag suspension is passed through into 18-80 mesh net filtration
Afterwards, the prefabricated slurries of carbide slag are formed；Step 3) cyclonic separation: the prefabricated slurries of carbide slag through the screen to filtrate are injected hydraulic solid-liquid
After two phase separator, cyclonic separation is carried out to it by hydraulic solid-liquid two phase separator；Step 4) purification: by hydrocyclone
The primary slurries of overflow port outflow introduce treatment tank, and added slurries, complexing after complexing agent and reducing agent in treatment tank
The mode that agent and reducing agent stir evenly is to purification, and the specific gravity of the respective opposing primary slurries of complexing agent and reducing agent is with added with making
Reach subject to 9-11.5 for the complexing agent of adjuvant and the carbide slag slurry pH value of reducing agent, speed of agitator 100-200r/min is stirred
Mix time 5-10min；Step 5) filters pressing: by make purification primary slurries by plate-frame filtering in a manner of filters pressing, formed carbide slag
Mud cake simultaneously controls carbide slag mud cake water content≤30%；Step 6) drying: drying is carried out up to it to the carbide slag mud cake through filters pressing
Water content≤5% and it is decomposed into deformed calcium hydroxide powder, 200-500 DEG C of drying temperature；Step 7) cyclonic separation: will be through
The calcium hydroxide powder of drying is sent into cyclone separator, and it is larger to remove specific gravity contained by calcium hydroxide powder by cyclone separator
Gravel and grit and through collecting the disengaging gravel and grit and the lesser calcium hydroxide powder of specific gravity that are discharged from cyclone separator；
The calcining of step 8) two-stage: calcium hydroxide powder is sent into kiln calcining immediately, calcine technology is implemented to it, makes calcium hydroxide powder
It is successively calcined through level-one calcining and second level and generates lime powder: 500-800 DEG C of level-one calcination temperature and calcination time
60min-120min, 800-1000 DEG C of second level calcination temperature and calcination time 120min-180min；Step 9) pressure ball: will be through two
The lime powder that grade is calcined and generated is cooled to 100-150 DEG C and is 0.1% in the specific gravity for wherein adding opposite lime powder
Neutral binder after be sent into ball press, make it successively by pressurizeing twice and be pressed balling-up, first time moulding pressure 5-
10Mpa, second of moulding pressure 15-20Mpa；Step 10) screening packaging: it will be compressed into and pass through in spherical oxidation calcospherite
Screening rejecting is therein in after spherical calcium oxide block, carries out quantitative weighing packaging to carbide slag sphere.
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| CN110270432A (en) * | 2019-06-18 | 2019-09-24 | 西安建筑科技大学 | A kind of method of non-calcareous dirt in removal carbide slag |
| CN110759371A (en) * | 2019-12-04 | 2020-02-07 | 新疆国峰嘉和环保科技有限公司 | Method for preparing calcium oxide by purifying and recycling carbide slag |
| CN112456619A (en) * | 2020-10-13 | 2021-03-09 | 新疆中泰化学股份有限公司 | Method and device for producing water treatment regulator by using carbide slag |
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