CN108726550A - A method of preparing active calcium oxide using carbide slag - Google Patents
A method of preparing active calcium oxide using carbide slag Download PDFInfo
- Publication number
- CN108726550A CN108726550A CN201810718408.0A CN201810718408A CN108726550A CN 108726550 A CN108726550 A CN 108726550A CN 201810718408 A CN201810718408 A CN 201810718408A CN 108726550 A CN108726550 A CN 108726550A
- Authority
- CN
- China
- Prior art keywords
- slurry
- carbide slag
- obtains
- eddy flow
- flow processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of method preparing active calcium oxide using carbide slag, the method includes：Carbide slag slurry is subjected to screening process, obtains coarse granule and screening slurries；Obtained screening slurries are subjected to eddy flow processing, obtain the first overflow slurry and the first bottom slurry；First bottom slurry is subjected to eddy flow processing again, obtains the second overflow slurry and the second bottom slurry, is separated by solid-liquid separation after overflow slurry mixing twice, obtains fine grained, the second bottom slurry is separated by solid-liquid separation to obtain middle coarse granule；Obtained fine grained is mixed with additive again, forming processes and sintering processes is carried out successively, obtains active calcium oxide.The calcium carbide solid impurity particle of different-grain diameter is detached more thorough by the method for the invention, and has different purposes, realizes the recycling of carbide slag；The method is simple for process, flow is short, without secondary solid waste discharge, efficiently solves the pollution problem of carbide slag, has good economy and social value.
Description
Technical field
The invention belongs to solid waste resource recoveries to utilize technical field, be related to a kind of utilization carbide slag preparation active oxidation
The method of calcium.
Background technology
Carbide slag is that calcium carbide reacts the solid waste for preparing and generating during acetylene, polyvinyl chloride (PVC) industry with water
About 18,000,000 tons of carbide slags of discharge every year.Contain abundant calcium resource in carbide slag, there is very big potential resource recycle value,
Its utilization ways includes mainly production of construction materials, environmental improvement, common calcification chemical product.The usually mating cement producing line of carbide slag,
In recent years, as cement industry excess capacity, the calcium carbide quantity of slag of consumption gradually decrease, overall utilization rate is only discharge capacity
15%, a large amount of stackings of carbide slag are caused, not only occupy a large amount of soils, and seriously pollute environment.
Active calcium oxide is also known as the efficient oxidation calcium, is the leading indicator for weighing lime quality.Widely used quality in the world
Well, react fast, the thorough active calcium oxide of slag making replaces common calcium oxide to be applied to metallurgy industry.Active calcium oxide has because of it
The advantages that crystal grain is small, the porosity is high, bulk density is small, large specific surface area, reactivity is strong, impurity is low, epigranular is also by chemical industry
And other industry high-end product extensive use.Traditional activated calcium oxide is produced by calcination of calcium carbonate, as Calcium Carbonate resource is opened
The gradual control adopted prepares active calcium oxide using solid waste such as carbide slags and has become research hotspot.Hydrogen-oxygen in carbide slag
Change calcium content and can reach 80%~90%, refined calcium hydroxide can be obtained with separating-purifying, and then produce calcium oxide.
103288116 A of CN disclose a kind of method preparing high-purity calcium hydroxide using carbide slag, and this method first will be electric
Rock ballast is made into slurries, is dispersed through, is sieved successively, stirring, cyclonic separation, and collection obtains product, but this method is only through physical separation
Process, it is relatively low to the removal rate of impurity.104828824 A of CN disclose a kind of carbide slag and prepare calcium carbide with coke powder coforming
Method, this method are that carbide slag after purifying prepares carbon containing carbide slag with coke powder organic binder coforming, then through calcining
Dehydrating and curing is prepared into carbon containing blocky calcium oxide, is then fired into calcium carbide in high-temperature electric resistance furnace again, and this method needs first to carbide slag
Modification, subsequent processes are relatively complicated, and cost is higher.105502460 A of CN disclose a kind of utilization carbide slag production
The method of carbide raw material, this method first sieve carbide slag, then detach, remove water through magnetic separation, ore grinding, ore pulp modulation, suspension again,
Mixed carbon, granulating and forming, drying and calcination process, the process is complicated, needs by processes such as ore grindings, production cost is high.
In conclusion also needing to seek that carbide slag can be carried out to simple, efficient purification, then active calcium oxide is prepared
Method, enable carbide slag resource efficiently using and secondary pollution will not be brought.
Invention content
In view of the problems of the existing technology, the purpose of the present invention is to provide a kind of active oxidation is prepared using carbide slag
The method of calcium, the method carry out cyclonic separation by the carbide slag that obtains wet processing, then through material mixing, molding and sintered
Active calcium oxide is prepared in journey.Present invention process is simple, easy to operate, and without secondary solid waste discharge, economic society
Benefit is preferable.
For this purpose, the present invention uses following technical scheme：
The present invention provides a kind of methods preparing active calcium oxide using carbide slag, the described method comprises the following steps：
(a) screening process is carried out after carbide slag being configured to carbide slag slurry, obtains coarse granule and screening slurries；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing, obtain the first overflow slurry and the first underflow slurry
Liquid；
(c) bottom slurry that step (b) obtains is subjected to eddy flow processing again, obtains the second overflow slurry and the second underflow
Slurries, second overflow slurry are mixed with step (b) first overflow slurry, are separated by solid-liquid separation, are obtained fine grained, and described the
Two bottom slurries obtain middle coarse granule after being separated by solid-liquid separation；
(d) fine grained that step (c) obtains is mixed with additive, carries out forming processes and sintering processes successively, obtains
Active calcium oxide.
In the present invention, using the carbide slag generated during wet method acetylene production process as raw material, successively sieved, eddy flow
Coarse granule, middle coarse granule and fine grained can be obtained in processing, and the particle separation of different-grain diameter is more thorough, has different purposes,
Convenient for being utilized respectively, fine grained therein obtains active calcium oxide by material mixing, molding and sintering processes.The method of the invention
It is simple for process, flow is short, without secondary solid waste discharge, realizes the efficient recycling of carbide slag waste material, have it is good economical and
Social value.
In the present invention, " first " and " second " before overflow slurry and bottom slurry, is not the limitation to slurries, only
Slurries after the convenient separation to different phase distinguish.
It is used as currently preferred technical solution below, but not as the limitation of technical solution provided by the invention, passes through
Following technical scheme can preferably reach and realize the technical purpose and advantageous effect of the present invention.
As currently preferred technical solution, step (a) carbide slag is generated by wet method acetylene production process.
Preferably, the treating capacity of step (a) carbide slag be 10~200t/h, such as 10t/h, 30t/h, 50t/h,
80t/h, 100t/h, 120t/h, 150t/h, 180t/h or 200t/h etc., it is not limited to cited numerical value, the numerical value model
Other unrequited numerical value are equally applicable in enclosing.
In the prior art, the production of acetylene mainly has two kinds of dry process and wet processing, and in of the invention, wet processing obtains
To carbide slag be known as wet method carbide slag, water content is high, is detached again after needing to configure into carbide slag slurry.Carbide slag
The accessible treatment scale of the size for the treatment of capacity and cyclone used, i.e. carbide slag is related, generally 10~200t/h, such as
10t/h, 30t/h, 50t/h, 80t/h, 100t/h, 120t/h, 150t/h, 180t/h or 200t/h etc., it is not limited to institute
The numerical value enumerated, other interior unrequited numerical value of the numberical range are equally applicable.
As currently preferred technical solution, solid content is 10~30wt%, example in step (a) carbide slag slurry
Such as 10wt%, 12wt%, 15wt%, 18wt%, 20wt%, 23wt%, 25wt%, 27wt% or 30wt%, but simultaneously not only
It is limited to cited numerical value, other unrequited numerical value are equally applicable in the numberical range.
Preferably, step (a) screening process carries out in vibrating screen.
Preferably, the screen-aperture of the vibrating screen be 0.5~1.5mm, such as 0.5mm, 0.7mm, 0.9mm, 1.0mm,
1.2mm, 1.4mm or 1.5mm etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range are same
Sample is applicable in.
In the present invention, the carbide slag that wet method acetylene production process generates cannot directly dry method be detached since water content is higher,
Need to be made into wet separation after carbide slag slurry.Due to the difference of carbide slag grain size, the vibrosieve that first aperture can be used larger
Coarse granule is separated out, remaining particle further detaches.
As currently preferred technical solution, step (b) and step (c) the eddy flow processing carry out in cyclone.
Preferably, when step (b) eddy flow is handled, a diameter of 100~300mm of cyclone pipe used, such as
100mm, 150mm, 200mm, 250mm or 300mm etc., it is not limited to cited numerical value, in the numberical range, other are not
The numerical value enumerated is equally applicable.
Preferably, the operating pressure of step (b) eddy flow processing is 0.06~0.12MPa, such as 0.06MPa,
0.07MPa, 0.08MPa, 0.09MPa, 0.10MPa, 0.11MPa or 0.12MPa etc., it is not limited to cited numerical value,
Other unrequited numerical value are equally applicable in the numberical range.
As currently preferred technical solution, when step (c) eddy flow is handled, cyclone pipe used a diameter of 25~
75mm, such as 25mm, 40mm, 50mm, 60mm or 75mm etc., it is not limited to cited numerical value, in the numberical range its
His unrequited numerical value is equally applicable.
In the present invention, the separating effect of eddy flow processing is related with the selection of cyclonic separation condition, such as operating pressure, eddy flow
The diameter etc. of pipe, in order to reach better separating effect, the bottom slurry by a cyclonic separation carries out two level eddy flow again
Separation, obtains overflow slurry and bottom slurry again.
Preferably, the operating pressure of step (c) eddy flow processing is 0.06~0.12MPa, such as 0.06MPa,
0.07MPa, 0.08MPa, 0.09MPa, 0.10MPa, 0.11MPa or 0.12MPa etc., it is not limited to cited numerical value,
Other unrequited numerical value are equally applicable in the numberical range.
Preferably, step (c) is described is separated by solid-liquid separation as filtering.
Preferably, after the separation of solid and liquid described in step (c), processing is dried in obtained fine grained.
In the present invention, coarse granule, middle coarse granule and fine grain grain size divide the carbide slag generated with acetylene production process
Related, the component of different purposes needs the work by the way that device is arranged in carbide slag after having its corresponding particle size range, grain size to divide
Separation is realized as parameter.
As currently preferred technical solution, step (a) coarse granule is used as ferrosilicon primary product.
As currently preferred technical solution, step (c) the middle coarse granule was prepared for aluminium polychloride (PAC)
The regulator of basicity in journey.
As currently preferred technical solution, step (d) additive includes inorganic matter and/or organic matter.
In the present invention, the additive has certain viscosity, it can be achieved that fine grain benign viscous in carbide slag after processing
Knot, (1000~1300 DEG C) can volatilize under the high temperature conditions, not influence the activity of active oxidation calcium product.
Preferably, the inorganic matter includes inorganic coagulation material.
Preferably, the organic matter includes organic cementitious material and/or cellulose.
Preferably, the dosage of step (d) additive is 0.5~1wt% of corresponding fine grained dosage, such as
0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt% or 1wt% etc., it is not limited to cited numerical value, it should
Other unrequited numerical value are equally applicable in numberical range.
In the present invention, the addition of additive in fine grained is conducive to the subsequent molding of fine grained, avoids in sintering process
Fine grained is caused because grain size is too small, weight kicks the beam due to walk-off-loss, is one of an important factor for influencing active calcium oxide performance, if
Additive amount is on the low side, and fine-grained powder can be caused not easily molded, if additive amount is on the high side, it will cause what is obtained after sintering
Active calcium oxide strength reduction, it is broken, it is reduced so as to cause the metallurgy activity of active calcium oxide.
As currently preferred technical solution, the pressure of step (d) forming processes is 50~200MPa, such as
50MPa, 75MPa, 100MPa, 125MPa, 150MPa, 175MPa or 200MPa etc., it is not limited to cited numerical value, it should
Other unrequited numerical value are equally applicable in numberical range；Time be 0.5~1min, such as 0.5min, 0.6min, 0.7min,
0.8min, 0.9min or 1min etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range are same
Sample is applicable in.
Preferably, the temperature of the sintering processes be 1000~1300 DEG C, such as 1000 DEG C, 1050 DEG C, 1100 DEG C, 1150
DEG C, 1200 DEG C, 1250 DEG C or 1300 DEG C etc., it is not limited to cited numerical value, other are unrequited in the numberical range
Numerical value is equally applicable；Time be 20~90min, such as 20min, 30min, 40min, 50min, 60min, 70min, 80min or
90min etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range are equally applicable.
In the present invention, roasted after the fine grained and additive molding in carbide slag, it can be by main component hydrogen-oxygen
Change calcium and be converted into active calcium oxide, its specific surface area is made to increase, active site increases, and has better reactivity, is to influence
One of an important factor for active calcium oxide performance, can make carbide slag that can not convert if sintering temperature is relatively low, cannot obtain qualification
Active oxidation calcium product, if sintering temperature is higher, it is hardened that it will cause calcium oxide, and surface-active site is reduced, and activity reduces.
As currently preferred technical solution, the described method comprises the following steps：
(a) carbide slag is configured to carbide slag slurry, solid content is 10~30wt% in the carbide slag slurry, is then existed
Screening process is carried out in vibrating screen, the screen-aperture of the vibrating screen is 0.5~1.5mm, obtains coarse granule and screening slurries, institute
It states coarse granule and is used as ferrosilicon primary product；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing in cyclone, cyclone pipe in the cyclone
The operating pressure of a diameter of 100~300mm, the eddy flow processing are 0.06~0.12MPa, obtain the first overflow slurry and first
Bottom slurry；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, cyclone pipe used a diameter of 25~
The operating pressure of 75mm, the eddy flow processing are 0.06~0.12MPa, obtain the second overflow slurry and the second bottom slurry, institute
It states the second overflow slurry to mix with step (b) first overflow slurry, is separated by solid-liquid separation, obtains fine grained, second underflow
Slurries obtain middle coarse granule after being separated by solid-liquid separation, the middle coarse granule is used for the adjustment of basicity in aluminium polychloride preparation process
Agent；
(d) fine grained that step (c) obtains is mixed with additive, the dosage of the additive is fine grained dosage
0.5~1wt%, carries out forming processes and sintering processes successively, and the forming processes pressure is 50~200MPa, when forming processes
Between be 0.5~1min, the sintering processes temperature be 1000~1300 DEG C, the sintering processes time be 20~90min, obtain activity
Calcium oxide.
Compared with prior art, the invention has the advantages that：
(1) present invention is handled by the way that carbide slag to be carried out to screening process and eddy flow successively, and obtained coarse granule is used as ferrosilicon
Primary product, middle coarse granule are used for the regulator of basicity in PAC preparation process, and active calcium oxide production is prepared in fine grained
Product, calcium oxide content can reach 92.5wt% or more in products obtained therefrom, and metallurgical activity degree can reach 360mL or more；
(2) the method for the invention is easy to operate, and flow is short, without secondary solid waste discharge, efficiently solves the dirt of carbide slag
Dye problem, with good economic efficiency and social benefit.
Description of the drawings
Fig. 1 is the process flow chart that active calcium oxide method is prepared using carbide slag that the embodiment of the present invention 1 provides.
Specific implementation mode
For the present invention is better described, be easy to understand technical solution, below the present invention is described in more detail.But it is following
Embodiment be only the present invention simple example, not represent or limit the scope of the present invention, the present invention protection
Range is subject to claims.
Specific embodiment of the invention part provides a kind of method preparing active calcium oxide using carbide slag, the side
Method includes the following steps：
(a) screening process is carried out after wet method carbide slag being configured to carbide slag slurry, obtains coarse granule and screening slurries；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing, obtain the first overflow slurry and the first underflow slurry
Liquid；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, obtains the second overflow slurry and second
Bottom slurry, second overflow slurry are mixed with step (b) first overflow slurry, are separated by solid-liquid separation, are obtained fine grained, institute
It states after the second bottom slurry is separated by solid-liquid separation and obtains middle coarse granule；
(d) fine grained that step (c) obtains is mixed with additive, carries out forming processes and sintering processes successively, obtains
Active calcium oxide.
It is present invention typical case but non-limiting embodiment below：
Embodiment 1：
Present embodiments provide a kind of method preparing active calcium oxide using carbide slag, the process flow chart of the method
As shown in Figure 1, including the following steps：
(a) wet method carbide slag is configured to carbide slag slurry, solid content is 10wt% in the carbide slag slurry, is then existed
Screening process is carried out in vibrating screen, the screen-aperture of the vibrating screen is 1mm, obtains coarse granule and sieves slurries, described thick
Grain is used as ferrosilicon primary product；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing in cyclone, cyclone pipe used it is a diameter of
The operating pressure of 100mm, the eddy flow processing are 0.06MPa, obtain the first overflow slurry and the first bottom slurry；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, cyclone pipe used it is a diameter of
The operating pressure of 25mm, eddy flow processing are 0.06MPa, obtain the second overflow slurry and the second bottom slurry, described second
Overflow slurry is mixed with step (b) first overflow slurry, and fine grained, the second bottom slurry mistake are obtained after filtration drying
Middle coarse granule is obtained after filter, the middle coarse granule prepares basicity regulator as PAC；
(d) fine grained that step (c) obtains is mixed with inorganic coagulation material, the dosage of the inorganic coagulation material is thin
The 0.5wt% of amount of particles carries out forming processes successively and sintering processes, briquetting pressure 100MPa, molding time is
0.5min, sintering temperature are 1200 DEG C, and sintering time 60min obtains active calcium oxide.
In the present embodiment, the content of calcium oxide is 94.0wt% in the product that step (d) obtains, and is with the hydrochloric acid of 4mol/L
Analytical reagent, the metallurgical activity degree for measuring active calcium oxide are 369mL.
Embodiment 2：
A kind of method preparing active calcium oxide using carbide slag is present embodiments provided, the method includes following steps
Suddenly：
(a) wet method carbide slag is configured to carbide slag slurry, solid content is 15wt% in the carbide slag slurry, is then existed
Screening process is carried out in vibrating screen, the screen-aperture of the vibrating screen is 0.5mm, obtains coarse granule and screening slurries, described thick
Particle is used as ferrosilicon primary product；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing in cyclone, cyclone pipe used it is a diameter of
The operating pressure of 200mm, the eddy flow processing are 0.09MPa, obtain the first overflow slurry and the first bottom slurry；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, cyclone pipe used it is a diameter of
The operating pressure of 50mm, the eddy flow processing are 0.1MPa, obtain the second overflow slurry and the second bottom slurry, and described second overflows
Stream slurries are mixed with step (b) first overflow slurry, and fine grained, the second bottom slurry filtering are obtained after filtration drying
After obtain middle coarse granule, the middle coarse granule prepares basicity regulator as PAC；
(d) fine grained that step (c) obtains is mixed with organic cementitious material, the dosage of the organic cementitious material is thin
The 0.8wt% of amount of particles carries out forming processes successively and sintering processes, briquetting pressure 80MPa, molding time is
0.6min, sintering temperature are 1100 DEG C, and sintering time 30min obtains active calcium oxide.
In the present embodiment, the content of calcium oxide is 96.0wt% in the product that step (d) obtains, and is with the hydrochloric acid of 4mol/L
Analytical reagent, the metallurgical activity degree for measuring active calcium oxide are 388mL.
Embodiment 3：
A kind of method preparing active calcium oxide using carbide slag is present embodiments provided, the method includes following steps
Suddenly：
(a) wet method carbide slag is configured to carbide slag slurry, solid content is 30wt% in the carbide slag slurry, is then existed
Screening process is carried out in vibrating screen, the screen-aperture of the vibrating screen is 1.5mm, obtains coarse granule and screening slurries, described thick
Particle is used as ferrosilicon primary product；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing in cyclone, cyclone pipe used it is a diameter of
The operating pressure of 300mm, the eddy flow processing are 0.12MPa, obtain the first overflow slurry and the first bottom slurry；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, cyclone pipe used it is a diameter of
The operating pressure of 75mm, eddy flow processing are 0.12MPa, obtain the second overflow slurry and the second bottom slurry, described second
Overflow slurry is mixed with step (b) first overflow slurry, and fine grained, the second bottom slurry mistake are obtained after filtration drying
Middle coarse granule is obtained after filter, the middle coarse granule prepares basicity regulator as PAC；
(d) fine grained that step (c) obtains is mixed with inorganic coagulation material, the dosage of the inorganic coagulation material is thin
The 1wt% of amount of particles, carries out forming processes and sintering processes successively, and briquetting pressure 200MPa, molding time 1min are burnt
Junction temperature is 1300 DEG C, and sintering time 90min obtains active calcium oxide.
In the present embodiment, the content of calcium oxide is 93.2wt% in the product that step (d) obtains, and is with the hydrochloric acid of 4mol/L
Analytical reagent, the metallurgical activity degree for measuring active calcium oxide are 365mL.
Embodiment 4：
A kind of method preparing active calcium oxide using carbide slag is present embodiments provided, the method includes following steps
Suddenly：
(a) wet method carbide slag is configured to carbide slag slurry, solid content is 25wt% in the carbide slag slurry, is then existed
Screening process is carried out in vibrating screen, the screen-aperture of the vibrating screen is 1.2mm, obtains coarse granule and screening slurries, described thick
Particle is used as ferrosilicon primary product；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing in cyclone, cyclone pipe used it is a diameter of
The operating pressure of 150mm, the eddy flow processing are 0.07MPa, obtain the first overflow slurry and the first bottom slurry；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, cyclone pipe used it is a diameter of
The operating pressure of 40mm, eddy flow processing are 0.08MPa, obtain the second overflow slurry and the second bottom slurry, described second
Overflow slurry is mixed with step (b) first overflow slurry, and fine grained, the second bottom slurry mistake are obtained after filtration drying
Middle coarse granule is obtained after filter, the middle coarse granule prepares basicity regulator as PAC；
(d) fine grained that step (c) obtains is mixed with cellulose, the dosage of the cellulose is fine grained dosage
0.6wt% carries out forming processes and sintering processes, briquetting pressure 150MPa, molding time 0.8min, sintering temperature successively
It it is 1000 DEG C, sintering time 45min obtains active calcium oxide.
In the present embodiment, the content of calcium oxide is 92.5wt% in the product that step (d) obtains, and is with the hydrochloric acid of 4mol/L
Analytical reagent, the metallurgical activity degree for measuring active calcium oxide are 362mL.
Embodiment 5：
A kind of method preparing active calcium oxide using carbide slag is present embodiments provided, the method includes following steps
Suddenly：
(a) wet method carbide slag is configured to carbide slag slurry, solid content is 20wt% in the carbide slag slurry, is then existed
Screening process is carried out in vibrating screen, the screen-aperture of the vibrating screen is 0.8mm, obtains coarse granule and screening slurries, described thick
Particle is used as ferrosilicon primary product；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing in cyclone, cyclone pipe used it is a diameter of
The operating pressure of 250mm, the eddy flow processing are 0.09MPa, obtain the first overflow slurry and the first bottom slurry；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, cyclone pipe used it is a diameter of
The operating pressure of 60mm, eddy flow processing are 0.09MPa, obtain the second overflow slurry and the second bottom slurry, described second
Overflow slurry is mixed with step (b) first overflow slurry, and fine grained, the second bottom slurry mistake are obtained after filtration drying
Middle coarse granule is obtained after filter, the middle coarse granule prepares basicity regulator as PAC；
(d) fine grained that step (c) obtains is mixed with inorganic coagulation material, organic cementitious material, the inorganic gel
Total dosage of material and organic cementitious material is the 0.7wt% of fine grained dosage, carries out forming processes and sintering processes successively, at
Type pressure is 50MPa, and molding time 0.9min, sintering temperature is 1150 DEG C, and sintering time 75min obtains active oxidation
Calcium.
In the present embodiment, the content of calcium oxide is 95.0wt% in the product that step (d) obtains, and is with the hydrochloric acid of 4mol/L
Analytical reagent, the metallurgical activity degree for measuring active calcium oxide are 374mL.
Embodiment 6：
Present embodiments provide a kind of method preparing active calcium oxide using carbide slag, the method with reference to embodiment 1,
It differs only in：The dosage of inorganic coagulation material is the 0.4wt% of fine grained dosage in step (d), i.e. the dosage of additive is inclined
It is few.
In the present embodiment, since the dosage of additive is on the low side, the molding effect under the same terms is deteriorated, intensity drop before being sintered
Low, when sintering, is not easy to promote the metallurgical activity of calcium oxide, and products obtained therefrom degree of crushing is larger after sintering, is with the hydrochloric acid of 4mol/L
Analytical reagent, the metallurgical activity degree for measuring active calcium oxide is only 345mL.
Embodiment 7：
Present embodiments provide a kind of method preparing active calcium oxide using carbide slag, the method with reference to embodiment 1,
It differs only in：The dosage of inorganic coagulation material is the 1.1wt% of fine grained dosage in step (d), i.e. the dosage of additive is inclined
It is more.
In the present embodiment, since the dosage of additive is on the high side, when molding under the same terms, when roasting, can form a large amount of
Stomata leads to strength reduction, and products obtained therefrom measures the metallurgical activity degree of active calcium oxide using the hydrochloric acid of 4mol/L as analytical reagent
Only 342mL.
Embodiment 8：
Present embodiments provide a kind of method preparing active calcium oxide using carbide slag, the method with reference to embodiment 1,
It differs only in：Sintering temperature is 950 DEG C in step (d), i.e., sintering temperature is relatively low.
In the present embodiment, since sintering temperature is relatively low, calcium hydroxide can not be completely reformed into calcium oxide, gained by when roasting
The content of calcium oxide is reduced to 88wt% in product, using the hydrochloric acid of 4mol/L as analytical reagent, measures the metallurgy of active calcium oxide
Activity degree is only 346mL.
Embodiment 9：
Present embodiments provide a kind of method preparing active calcium oxide using carbide slag, the method with reference to embodiment 1,
It differs only in：Sintering temperature is 1350 DEG C in step (d), i.e., sintering temperature is higher.
In the present embodiment, since sintering temperature is higher, gained active calcium oxide product is hardened after roasting, and specific surface area subtracts
Small, active sites points are also corresponding to be reduced, and is analysis with the hydrochloric acid of 4mol/L even if the content of calcium oxide is 95wt% in the product
Reagent, the metallurgical activity degree for measuring active calcium oxide is only 338mL.
Comparative example 1：
This comparative example provides a kind of method preparing active calcium oxide using carbide slag, the method with reference to embodiment 1,
It differs only in：Step (d) is added without inorganic coagulation material, i.e. fine grained directly carries out forming processes and sintering processes.
In this comparative example, since additive is not added in fine grained, molding effect is poor, and when roasting is not easy to improve oxidation
Calcium activity, using the hydrochloric acid of 4mol/L as analytical reagent, the metallurgical activity degree for measuring active calcium oxide is only 318mL.
It can be obtained with comparative example based on the above embodiments, the method for the invention is by sieving wet method carbide slag
Divide, eddy flow processing, directly separates carbide slag by coarse granule, middle coarse granule and fine grained, the particle separation of different-grain diameter range
More thoroughly, the recycling of carbide slag is realized, can reach by calcium oxide content in fine grained products obtained therefrom
92.5wt% or more, metallurgical activity degree can reach 360mL or more；The method is easy to operate, and flow is short, no secondary solid waste row
It puts, efficiently solves the pollution problem of carbide slag, with good economic efficiency and social benefit.
Applicant states that the present invention illustrates the process of the present invention, but the present invention not office by above-described embodiment
It is limited to above-mentioned process, that is, does not mean that the present invention has to rely on above-mentioned process and could implement.Technical field
Technical staff is it will be clearly understood that any improvement in the present invention, to the equivalence replacement that is operated selected by the present invention and auxiliary operation
Addition, the selection etc. of concrete mode, all fall within protection scope of the present invention and the open scope.
Claims (10)
1. a kind of method preparing active calcium oxide using carbide slag, which is characterized in that the described method comprises the following steps：
(a) screening process is carried out after carbide slag being configured to carbide slag slurry, obtains coarse granule and screening slurries；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing, obtain the first overflow slurry and the first bottom slurry；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, obtains the second overflow slurry and the second underflow
Slurries, second overflow slurry are mixed with step (b) first overflow slurry, are separated by solid-liquid separation, are obtained fine grained, and described the
Two bottom slurries are separated by solid-liquid separation, and obtain middle coarse granule；
(d) fine grained that step (c) obtains is mixed with additive, carries out forming processes and sintering processes successively, obtains activity
Calcium oxide.
2. according to the method described in claim 1, it is characterized in that, step (a) carbide slag is by wet method acetylene production process
It generates.
3. method according to claim 1 or 2, which is characterized in that solid content is 10 in step (a) carbide slag slurry
~30wt%；
Preferably, step (a) screening process carries out in vibrating screen；
Preferably, the screen-aperture of the vibrating screen is 0.5~1.5mm.
4. according to claim 1-3 any one of them methods, which is characterized in that step (b) and step (c) the eddy flow processing
It is carried out in cyclone；
Preferably, when step (b) eddy flow is handled, a diameter of 100~300mm of cyclone pipe used；
Preferably, the operating pressure of step (b) the eddy flow processing is 0.06~0.12MPa.
5. according to claim 1-4 any one of them methods, which is characterized in that used when step (c) eddy flow is handled
A diameter of 25~the 75mm of cyclone pipe；
Preferably, the operating pressure of step (c) the eddy flow processing is 0.06~0.12MPa.
6. according to claim 1-5 any one of them methods, which is characterized in that at the beginning of step (a) coarse granule is used as ferrosilicon
Grade product.
7. according to claim 1-6 any one of them methods, which is characterized in that step (c) the middle coarse granule is for polymerizeing
The regulator of basicity in aluminium chloride preparation process.
8. according to claim 1-7 any one of them methods, which is characterized in that step (d) additive includes inorganic matter
And/or organic matter；
Preferably, the inorganic matter includes inorganic coagulation material；
Preferably, the organic matter includes organic cementitious material and/or cellulose；
Preferably, the dosage of step (d) additive is 0.5~1wt% of corresponding fine grained dosage.
9. according to claim 1-8 any one of them methods, which is characterized in that the pressure of step (d) forming processes is
50~200MPa, time are 0.5~1min；
Preferably, the temperature of the sintering processes is 1000~1300 DEG C, and the time is 20~90min.
10. according to claim 1-9 any one of them methods, which is characterized in that the described method comprises the following steps：
(a) carbide slag is configured to carbide slag slurry, solid content is 10~30wt% in the carbide slag slurry, is then being vibrated
Screening process is carried out in sieve, the screen-aperture of the vibrating screen is 0.5~1.5mm, obtains coarse granule and screening slurries, described thick
Particle is used as ferrosilicon primary product；
(b) the screening slurries for obtaining step (a) carry out eddy flow processing in cyclone, the diameter of cyclone pipe in the cyclone
Operating pressure for 100~300mm, the eddy flow processing is 0.06~0.12MPa, obtains the first overflow slurry and the first underflow
Slurries；
(c) the first bottom slurry that step (b) obtains is subjected to eddy flow processing again, cyclone pipe used a diameter of 25~
The operating pressure of 75mm, the eddy flow processing are 0.06~0.12MPa, obtain the second overflow slurry and the second bottom slurry, institute
It states the second overflow slurry to mix with step (b) first overflow slurry, is separated by solid-liquid separation, obtains fine grained, second underflow
Slurries obtain middle coarse granule after being separated by solid-liquid separation, the middle coarse granule is used for the adjustment of basicity in aluminium polychloride preparation process
Agent；
(d) fine grained that step (c) obtains is mixed with additive, the dosage of the additive be fine grained dosage 0.5~
1wt% carries out forming processes and sintering processes successively, and the forming processes pressure is 50~200MPa, and the forming processes time is
0.5~1min, the sintering processes temperature are 1000~1300 DEG C, and the sintering processes time is 20~90min, obtains active oxidation
Calcium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810718408.0A CN108726550B (en) | 2018-07-03 | 2018-07-03 | Method for preparing active calcium oxide by using carbide slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810718408.0A CN108726550B (en) | 2018-07-03 | 2018-07-03 | Method for preparing active calcium oxide by using carbide slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108726550A true CN108726550A (en) | 2018-11-02 |
| CN108726550B CN108726550B (en) | 2020-06-30 |
Family
ID=63925944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810718408.0A Active CN108726550B (en) | 2018-07-03 | 2018-07-03 | Method for preparing active calcium oxide by using carbide slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108726550B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650429A (en) * | 2019-02-21 | 2019-04-19 | 新疆德安环保科技股份有限公司 | A kind of carbide slag recycling treatment process |
| CN111717916A (en) * | 2020-06-03 | 2020-09-29 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing calcium carbide raw material active calcium oxide by using wet-process calcium carbide slag |
| CN112010336A (en) * | 2020-08-25 | 2020-12-01 | 中国科学院过程工程研究所 | Method for preparing industrial calcium oxide for calcium carbide from calcium carbide slag |
| CN114832497A (en) * | 2022-03-23 | 2022-08-02 | 北京蓝布息科技有限公司 | Carbide slag hydrocyclone impurity removal system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61146708A (en) * | 1976-12-16 | 1986-07-04 | フリツツ・シヨツペ | Facilities and reaction chamber for continuously manufacturing powdery active calcium oxide from organic matter-containing waste lime of sugar manufacturing industry |
| CN102225780A (en) * | 2011-04-19 | 2011-10-26 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
| CN103288116A (en) * | 2013-05-15 | 2013-09-11 | 中国科学院过程工程研究所 | Method for preparing high-purity calcium hydroxide from carbide slag |
| CN103408051A (en) * | 2013-08-07 | 2013-11-27 | 中国科学院过程工程研究所 | High-activity and high-strength coupled regulation and control method for agglomerated calcium oxide |
| CN105948091A (en) * | 2016-05-12 | 2016-09-21 | 新疆中泰创安环境科技股份有限公司 | Active calcium oxide with calcium carbide dreg as raw material, desulfurizing agent, calcium carbide raw material and preparation method of active calcium oxide |
-
2018
- 2018-07-03 CN CN201810718408.0A patent/CN108726550B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61146708A (en) * | 1976-12-16 | 1986-07-04 | フリツツ・シヨツペ | Facilities and reaction chamber for continuously manufacturing powdery active calcium oxide from organic matter-containing waste lime of sugar manufacturing industry |
| CN102225780A (en) * | 2011-04-19 | 2011-10-26 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
| CN103288116A (en) * | 2013-05-15 | 2013-09-11 | 中国科学院过程工程研究所 | Method for preparing high-purity calcium hydroxide from carbide slag |
| CN103408051A (en) * | 2013-08-07 | 2013-11-27 | 中国科学院过程工程研究所 | High-activity and high-strength coupled regulation and control method for agglomerated calcium oxide |
| CN105948091A (en) * | 2016-05-12 | 2016-09-21 | 新疆中泰创安环境科技股份有限公司 | Active calcium oxide with calcium carbide dreg as raw material, desulfurizing agent, calcium carbide raw material and preparation method of active calcium oxide |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650429A (en) * | 2019-02-21 | 2019-04-19 | 新疆德安环保科技股份有限公司 | A kind of carbide slag recycling treatment process |
| CN111717916A (en) * | 2020-06-03 | 2020-09-29 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing calcium carbide raw material active calcium oxide by using wet-process calcium carbide slag |
| CN111717916B (en) * | 2020-06-03 | 2024-04-12 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing active calcium oxide as calcium carbide raw material by wet method calcium carbide slag |
| CN112010336A (en) * | 2020-08-25 | 2020-12-01 | 中国科学院过程工程研究所 | Method for preparing industrial calcium oxide for calcium carbide from calcium carbide slag |
| CN112010336B (en) * | 2020-08-25 | 2021-12-03 | 中国科学院过程工程研究所 | Method for preparing industrial calcium oxide for calcium carbide from calcium carbide slag |
| CN114832497A (en) * | 2022-03-23 | 2022-08-02 | 北京蓝布息科技有限公司 | Carbide slag hydrocyclone impurity removal system |
| CN114832497B (en) * | 2022-03-23 | 2023-12-15 | 北京蓝布息科技有限公司 | Carbide slag hydrocyclone impurity removal system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108726550B (en) | 2020-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108726550A (en) | A method of preparing active calcium oxide using carbide slag | |
| CN106927699B (en) | A method of calcium carbide lime is prepared using carbide slag | |
| JP5668614B2 (en) | Method for reusing used magnesia carbon brick and method for producing magnesia carbon brick | |
| CN101624654A (en) | Method for recycling iron and aluminum by particle size grading pretreatment of Bayer process red mud | |
| CN108483477A (en) | A method of preparing active calcium oxide using carbide slag | |
| CN100519780C (en) | Method for extracting vanadium pentoxide from stone coal | |
| CN103288116B (en) | Method for preparing high-purity calcium hydroxide from carbide slag | |
| CN110526250B (en) | Comprehensive utilization method for directly extracting lithium from silicate lithium-containing ore by acid process | |
| CN103484684B (en) | No-pollution treatment method of electrolytic aluminum smelting aluminum slag | |
| CN109650429A (en) | A kind of carbide slag recycling treatment process | |
| CN109231897A (en) | A kind of shield dregs is innoxious, recycling processing method | |
| CN109160744A (en) | Red mud magnetizing roast utilization system and technique | |
| CN108906316A (en) | A method of desulfurizing agent is prepared using carbide slag | |
| CN104487388B (en) | Method for reducing hexavalent chromium in oxidic solids | |
| CN106636521A (en) | Method and system for improving grinding separation effect of reduced pellets containing metal iron | |
| CN104001370A (en) | Dry discharge technology of tailings | |
| CN107805043A (en) | A kind of method that thin mine tailing and kaolin inferior prepare medium-to-high grade kaolin clay for ceramic | |
| JP6089792B2 (en) | Steelmaking slag treatment method | |
| CN112642580B (en) | Disposal method for gradient utilization of steel slag | |
| CN110451824A (en) | A kind of method that ore floatation tailings prepares Portland clinker | |
| CN113998680A (en) | Method for preparing lithium iron phosphate anode material by taking high-iron Bayer process red mud as iron source | |
| CN219731021U (en) | Spodumene smelting slag recycling comprehensive utilization system | |
| CN117165787A (en) | Method for extracting lithium from spodumene and simultaneously recovering low-iron low-sulfur silicon-aluminum micropowder, high-purity gypsum, tantalum-niobium concentrate and lithium-enriched iron material | |
| CN107285512A (en) | A kind of method and system of Treatment of Wastewater in Coking | |
| KR101185362B1 (en) | A production method of briquette using waste materials of steel making |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |