CN215049721U

CN215049721U - Technology for preparing retarded cement by using solid waste phosphogypsum

Info

Publication number: CN215049721U
Application number: CN202120669604.0U
Authority: CN
Inventors: 王传伟; 姚运宽; 朱守道
Original assignee: FENGYANG ZHONGDU CEMENT CO LTD
Current assignee: FENGYANG ZHONGDU CEMENT CO LTD
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-12-07
Anticipated expiration: 2031-04-01

Abstract

The utility model discloses a solid waste ardealite preparation slow setting cement technique, including preparing the room, the right side of preparing the room is provided with the agitator tank, the right side of agitator tank is provided with smashes defeated material mechanism, the right side of smashing defeated material mechanism is provided with centrifugal sieve material mechanism, the front side of centrifugal sieve material mechanism is provided with the material loading conveyer belt, the front side of material loading conveyer belt is provided with the ball mill, centrifugal sieve material mechanism includes the casing, the through-hole has been seted up at the middle part of casing left side wall, the outside fixed mounting of casing right side wall has sieve material motor, the utility model relates to a cement solidification technology field. According to the technology for preparing the retarded cement by using the solid waste phosphogypsum, the phosphogypsum is used as a cement retarder and is matched with a whole set of production line, so that the production cost is reduced, the industrial waste residue can be changed into valuable, and meanwhile, the industrial waste residue is ground by a centrifugal screening mechanism and a ball mill, so that the particles are more uniform, and the dispersibility of the cement is better.

Description

Technology for preparing retarded cement by using solid waste phosphogypsum

Technical Field

The utility model relates to a cement coagulation technical field specifically is a solid waste ardealite preparation slow setting cement technique.

Background

The cement is a common building raw material, is a powdery hydraulic inorganic cementing material, is added with water and stirred into slurry, can be hardened in the air or better in water, can firmly glue materials such as sand, stone and the like together, and continuously increases the public infrastructure strength in China along with the continuous enhancement of the comprehensive national force of China.

The phosphogypsum is an industrial byproduct gypsum generated by the reaction of SO2 and CaCO3 in the process of generating smoke phosphorus in a thermal power plant, the main component is calcium sulfate dihydrate and some impurities, the composition of the phosphogypsum is similar to that of natural gypsum, a large number of practical researches show that the phosphogypsum is used for replacing the natural gypsum in the production of cement and can also meet the related performance index requirements, the phosphogypsum and hydrated calcium aluminate react to generate hydrated calcium sulphoaluminate acicular crystals (ettringite), the crystals are insoluble and wrap on the surface of cement clinker to form a protective film to prevent water from entering the cement and delay the hydration reaction, thereby avoiding the flash coagulation phenomenon generated by the hydration of pure cement clinker, and the phosphogypsum can also promote the hydration of tricalcium silicate and dicalcium silicate minerals in the cement, thereby improving the early strength of the cement and balancing the strength of each stage, and the phosphogypsum contains part of unreacted CaCO3 and part of soluble K3, Na salts and impurities can promote the hydration of cement and stimulate the full play of the activity of a cement admixture or a concrete admixture, so that a method for controlling the setting time of the cement by taking phosphogypsum as a retarder is urgently needed to be researched so as to meet the production requirement of the conventional anticoagulant cement.

SUMMERY OF THE UTILITY MODEL

To prior art not enough, the utility model provides a solid waste ardealite preparation slow setting cement technique can be through the setting time of the volume control cement that adds of adjusting the ardealite, and the cement that obtains through this processing, not only the initial set time is prolonged, and compressive strength and rupture strength have obtained the reinforcing moreover.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a solid waste ardealite preparation slow setting cement technique, includes the preparation room, the right side of preparation room is provided with the agitator tank, the right side of agitator tank is provided with smashes defeated material mechanism, the right side of smashing defeated material mechanism is provided with centrifugal sieve material mechanism, the front side of centrifugal sieve material mechanism is provided with the material loading conveyer belt, the front side of material loading conveyer belt is provided with the ball mill, centrifugal sieve material mechanism includes the casing, the through-hole has been seted up at the middle part of casing left side wall, the outside fixed mounting of casing right side wall has sieve material motor, the output of sieve material motor runs through inside and the fixedly connected with screen cloth that the right side wall that extends to the casing in the casing, the straight line at screen cloth axis place coincides mutually with the straight line at casing axis place.

Preferably, the preparation chamber comprises a supporting platform, a feeding belt distributed in the horizontal direction is installed at the top of the supporting platform, a housing is fixedly connected to the outer portion of the feeding belt and located at the top of the supporting platform, heating pipe sets are fixedly installed on the front inner side wall and the rear inner side wall of the housing, and a sealing plate and a blocking curtain are respectively arranged on the left side and the right side of the housing.

Preferably, the agitator tank includes a jar body, the top fixed mounting of the jar body has agitator motor, agitator motor's output runs through in the roof of the jar body through the pivot and extends to the inside of the jar body, and fixed cover is equipped with a plurality of stirring rakes on the outer wall of pivot.

Preferably, smash defeated material mechanism and include the conveyer pipe that distributes along the horizontal direction, the left side fixed mounting of conveyer pipe has the end plate, the middle part fixed mounting of end plate lateral wall has conveyor motor, conveyor motor's output runs through in inside and fixedly connected with auger delivery oar that the end plate extends to the conveyer pipe.

Preferably, the right side of the feeding belt extends to the upper part of the stirring tank through the baffle curtain.

Preferably, the right end of the conveying pipe penetrates through the through hole and extends to the inside of the screen, and the straight line where the axis of the conveying pipe is located coincides with the straight line where the axis of the screen is located.

Preferably, the feeding conveyer belt is distributed along the inclined direction, the bottom of the feeding conveyer belt is positioned below the discharge hole of the centrifugal sieving mechanism, and the top of the feeding conveyer belt is connected with the feed hole of the ball mill.

Advantageous effects

The utility model provides a technology for preparing retarded cement by using solid waste phosphogypsum. Compared with the prior art, the method has the following beneficial effects:

(1) according to the technology for preparing the retarded cement by using the solid waste phosphogypsum, the phosphogypsum is used as a cement retarder and is matched with a whole set of production line, so that the production cost of the retarded cement is reduced, the industrial waste residues can be changed into valuables, and meanwhile, the retarded cement is ground by a centrifugal screening mechanism and a ball mill, so that the particles are more uniform, and the dispersibility of the cement is better.

(2) The technology for preparing the slow setting cement by the solid waste phosphogypsum has the advantages that the whole production line is arranged, the raw materials can be selected and matched according to requirements, so that the prepared road slow setting cement is proper in setting time, the evaporation speed of moisture in concrete is reduced, the solidification speed of the concrete is reduced, the forming effect and quality of the concrete are ensured, and the stability, the permeability resistance and the crack resistance of cement paste are improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the preparation chamber of the present invention;

FIG. 3 is a schematic structural view of the stirring tank of the present invention;

FIG. 4 is a schematic structural view of the crushing and feeding mechanism of the present invention;

FIG. 5 is a schematic structural view of the centrifugal material sieving mechanism of the present invention;

in the figure: 1. a preparation chamber; 2. a stirring tank; 3. a crushing and conveying mechanism; 4. a centrifugal material screening mechanism; 5. a feeding conveyer belt; 6. a ball mill; 7. a support platform; 8. a feed zone; 9. a housing; 10. a heating pipe group; 11. closing the plate; 12. a curtain; 13. a tank body; 14. a stirring motor; 15. a rotating shaft; 16. a stirring paddle; 17. a delivery pipe; 18. an end plate; 19. a conveying motor; 20. a screw conveying paddle; 21. a housing; 22. a through hole; 23. a material sieving motor; 24. and (4) screening.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a technology for preparing retarded cement by solid waste phosphogypsum comprises a preparation chamber 1, wherein a stirring tank 2 is arranged on the right side of the preparation chamber 1, a crushing and conveying mechanism 3 is arranged on the right side of the stirring tank 2, a centrifugal screening mechanism 4 is arranged on the right side of the crushing and conveying mechanism 3, a feeding conveyer belt 5 is arranged on the front side of the centrifugal screening mechanism 4, a ball mill 6 is arranged on the front side of the feeding conveyer belt 5, the centrifugal screening mechanism 4 comprises a shell 21, a through hole 22 is formed in the middle of the left side wall of the shell 21, a screening motor 23 is fixedly arranged outside the right side wall of the shell 21, the output end of the screening motor 23 penetrates through the right side wall of the shell 21 and extends into the shell 21 and is fixedly connected with a screen 24, the straight line of the axis of the screen 24 coincides with the straight line of the axis of the shell 21, the preparation chamber 1 comprises a supporting platform 7, a feeding belt 8 which is distributed along the horizontal direction is arranged at the top of the supporting platform 7, a cover 9 is fixedly connected to the outside of the feeding belt 8 and the top of the supporting platform 7, heating pipe sets 10 are fixedly mounted on the front inner side wall and the rear inner side wall of the cover 9, a sealing plate 11 and a baffle 12 are respectively arranged on the left side and the right side of the cover 9, the stirring tank 2 comprises a tank body 13, a stirring motor 14 is fixedly mounted on the top of the tank body 13, the output end of the stirring motor 14 penetrates through the top wall of the tank body 13 through a rotating shaft 15 and extends to the inside of the tank body 13, a plurality of stirring paddles 16 are fixedly sleeved on the outer wall of the rotating shaft 15, the crushing and conveying mechanism 3 comprises a conveying pipe 17 distributed along the horizontal direction, an end plate 18 is fixedly mounted on the left side of the conveying pipe 17, a conveying motor 19 is fixedly mounted in the middle of the outer side wall of the end plate 18, the output end of the conveying motor 19 penetrates through the end plate 18 and extends to the inside of the conveying pipe 17 and is fixedly connected with a spiral conveying paddle 20, the right side of the feeding belt 8 penetrates through the baffle 12 and extends to the upper part of the stirring tank 2, the right end of the conveying pipe 17 penetrates through the through hole 22 and extends to the inside of the screen 24, the straight line where the axis of the conveying pipe 17 is located coincides with the straight line where the axis of the screen 24 is located, the feeding conveying belt 5 is distributed along the inclined direction, the bottom of the feeding conveying belt 5 is located below the discharge hole of the centrifugal screening mechanism 4, the top of the feeding conveying belt 5 is connected with the feed inlet of the ball mill 6, the phosphogypsum is used as a cement retarder and is matched with a whole set of production line, the production cost of retarded cement is reduced, industrial waste residues can be changed into things of value, meanwhile, the centrifugal screening mechanism 4 is used for recycling the ball mill 6 for grinding, particles are more uniform, and the dispersibility of the cement is better.

Example 1:

step one, preparing clinker, namely putting 75% of limestone, 10% of carbonaceous shale and 15% of iron raw materials into a preparation chamber 1 to prepare cement clinker;

step two, preparing a mixture, namely transferring the cement clinker (70%) in the step one to a stirring tank 2, adding corresponding auxiliary materials, uniformly stirring the auxiliary materials comprising limestone waste residues (10%), steel powder residues (8%) and coal gangue (4%), and obtaining the mixture, wherein the speed of the stirring tank is set to 10rpm, and the stirring time is set to 6 min;

regulating and controlling the slow setting time, adding phosphogypsum (4%) and phosphogypsum (4%) in corresponding proportions into the mixture obtained in the step two according to requirements to obtain cement coarse materials, setting the stirring speed to be 15rpm, and setting the stirring time to be 8 min;

step four, primary crushing, namely, performing primary crushing treatment on the coarse materials obtained in the step three through a crushing and conveying mechanism 3 to prepare retarded cement crushed materials;

step five, crushing again, namely treating the crushed delayed cement in the step four through a centrifugal screening mechanism, continuously crushing large particles screened by a screen 24 in the screen 24, and screening until the particles meet the particle requirements, and enabling the cement meeting the particle requirements to fall onto a feeding conveyer belt 5 for the next step;

step six, polishing, namely putting the cement meeting the particle requirement in the step five into a ball mill 6 for polishing to obtain the slow setting cement with the phosphogypsum controlled setting time, wherein the rotating speed of the ball mill 6 is 15rpm, and the polishing time is 6 min;

and step seven, transferring the delayed coagulation cement with the phosphogypsum controlled coagulation time in the step six to a storage tank for storage.

Example 2:

step one, preparing clinker, namely putting 78% of limestone, 9% of carbonaceous shale and 13% of iron raw materials into a preparation chamber 1 to prepare cement clinker;

step two, preparing a mixture, namely transferring the cement clinker (72%) in the step one to a stirring tank 2, adding corresponding auxiliary materials, uniformly stirring the auxiliary materials comprising limestone waste residues (10%), steel powder residues (8%) and coal gangue (4%), and obtaining the mixture, wherein the speed of the stirring tank is set to 10rpm, and the stirring time is set to 6 min;

regulating and controlling the slow setting time, adding phosphogypsum (3%) and phosphogypsum (3%) in corresponding proportions into the mixture obtained in the step two according to requirements to obtain cement coarse materials, setting the stirring speed to be 15rpm, and setting the stirring time to be 10 min;

Example 3:

step one, preparing clinker, namely putting 78% of limestone, 10% of carbonaceous shale and 12% of iron raw materials into a preparation chamber 1 to prepare cement clinker;

step two, preparing a mixture, namely transferring the cement clinker (72%) in the step one to a stirring tank 2, adding corresponding auxiliary materials, uniformly stirring the auxiliary materials comprising limestone waste residues (11%), steel powder residues (7%) and coal gangue (4%), and obtaining the mixture, wherein the speed of the stirring tank is set to be 12rpm, and the stirring time is set to be 6 min;

regulating and controlling the slow setting time, adding phosphogypsum (2.5%) and phosphogypsum (3.5%) in corresponding proportions into the mixture obtained in the step two according to requirements to obtain a cement coarse material, setting the stirring speed to be 15rpm, and setting the stirring time to be 10 min;

step six, polishing, namely putting the cement meeting the particle requirement in the step five into a ball mill 6 for polishing to obtain the slow setting cement with the phosphogypsum controlled setting time, wherein the rotating speed of the ball mill 6 is 15rpm, and the polishing time is 8 min;

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The technology for preparing retarded cement by using solid waste phosphogypsum comprises a preparation chamber (1), and is characterized in that: a stirring tank (2) is arranged on the right side of the preparation chamber (1), a crushing and conveying mechanism (3) is arranged on the right side of the stirring tank (2), a centrifugal screening mechanism (4) is arranged on the right side of the crushing and conveying mechanism (3), a feeding conveyer belt (5) is arranged at the front side of the centrifugal screening mechanism (4), a ball mill (6) is arranged at the front side of the feeding conveyer belt (5), the centrifugal screening mechanism (4) comprises a shell (21), the middle part of the left side wall of the shell (21) is provided with a through hole (22), a screening motor (23) is fixedly arranged outside the right side wall of the shell (21), the output end of the screening motor (23) penetrates through the right side wall of the shell (21) to extend into the shell (21) and is fixedly connected with a screen (24), the straight line of the axis of the screen (24) is coincident with the straight line of the axis of the shell (21).

2. The technology for preparing retarded cement by using the solid waste phosphogypsum as the claim 1 is characterized in that: the preparation chamber (1) comprises a supporting platform (7), a feeding belt (8) which is distributed along the horizontal direction is installed at the top of the supporting platform (7), a housing (9) is fixedly connected to the top of the supporting platform (7) and outside the feeding belt (8), heating pipe sets (10) are fixedly installed on the front inner side wall and the rear inner side wall of the housing (9), and a sealing plate (11) and a blocking curtain (12) are respectively arranged on the left side and the right side of the housing (9).

3. The technology for preparing retarded cement by using the solid waste phosphogypsum as the claim 1 is characterized in that: agitator tank (2) is including a jar body (13), the top fixed mounting of the jar body (13) has agitator motor (14), the output of agitator motor (14) runs through in the roof of the jar body (13) through pivot (15) and extends to the inside of the jar body (13), and fixed cover dress has a plurality of stirring rakes (16) on the outer wall of pivot (15).

4. The technology for preparing retarded cement by using the solid waste phosphogypsum as the claim 1 is characterized in that: smash defeated material mechanism (3) including conveyer pipe (17) along the horizontal direction distribution, the left side fixed mounting of conveyer pipe (17) has end plate (18), the middle part fixed mounting of end plate (18) lateral wall has conveyor motor (19), the output of conveyor motor (19) runs through in end plate (18) and extends to the inside and fixedly connected with auger delivery oar (20) of conveyer pipe (17).

5. The technology for preparing retarded cement by using the solid waste phosphogypsum as the claim 2 is characterized in that: the right side of the feeding belt (8) penetrates through the baffle curtain (12) and extends to the upper part of the stirring tank (2).

6. The technology for preparing retarded cement by using the solid waste phosphogypsum as the claim 4 is characterized in that: the right end of the conveying pipe (17) penetrates through the through hole (22) and extends to the inside of the screen (24), and the straight line where the axis of the conveying pipe (17) is located coincides with the straight line where the axis of the screen (24) is located.

7. The technology for preparing retarded cement by using the solid waste phosphogypsum as the claim 1 is characterized in that: the feeding conveyer belt (5) is distributed along the inclined direction, the bottom of the feeding conveyer belt (5) is positioned below the discharge hole of the centrifugal screening mechanism (4), and the top of the feeding conveyer belt (5) is connected with the feed inlet of the ball mill (6).