Preparation method of low-cost solid-waste-based cementing material expanding agent and grinding equipment

Abstract

The invention discloses a preparation method and grinding equipment of a low-cost solid-waste-based cementing material expanding agent. The grinding equipment comprises a basic component, a supporting component, a feeding component arranged on the supporting component, a screening component arranged on the supporting component and a grinding component, the control component comprises a driving assembly arranged on the supporting assembly, a reciprocating assembly arranged on the driving assembly and an impact assembly arranged on the supporting assembly. According to the preparation method of the low-cost solid-waste-based cementing material expanding agent and the grinding equipment, a driving motor operates to control a driving rod to rotate, and when the driving rod rotates, a reciprocating spiral groove can drive a moving ring to do up-down reciprocating motion through a control block, so that the left end of a screening plate shakes up and down for screening work; meanwhile, large particles are discharged into a discharging hopper through an outlet in the right side of the screening plate, and then are conveyed into a feeding hopper through a reel and a feeding channel to enter a grinding module to be ground again.

Description

Technical Field

[0001] The invention relates to the technical field of expansion agent preparation, and in particular to a preparation method and grinding equipment for a low-cost solid waste-based gelling material expansion agent. Background Art

[0002] my country is rich in mineral resources. There are not only many coal enterprises, thermal power plants, and chemical plants in the country, but also a large number of by-products such as coal gangue, fly ash, desulfurization gypsum, and phosphogypsum are produced every year. The infrastructure of various cities will also be accompanied by a large amount of construction waste.

[0003] With the acceleration of modernization construction, the construction efficiency and quality requirements of infrastructure projects are also constantly improving, the performance optimization of cementitious materials during use is also constantly improving, and the durability, hardness and impermeability requirements of cementitious materials are also gradually increasing. For example, various underground pipeline connections and roadbed repair construction at the project site, although the relevant market demand is constantly expanding, the environmental protection requirements are also constantly increasing in recent years, and the cost of raw materials for cementitious materials is also rising; in addition, in the process of expansion agent, grinding is a very important part, and the existing grinders still have shortcomings. After grinding, there will be impurities remaining inside the machine, which will affect the subsequent expansion agent. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above existing low-cost solid waste-based cementitious material expansion agent preparation method and grinding equipment, the environmental protection requirements have been continuously improved in recent years, and the cost of raw materials for cementitious materials has been continuously rising, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: S1. Mix the following ingredients by weight: 60-90 parts of coal gangue, 0-12 parts of fly ash, 50-68 parts of construction waste, 18-50 parts of phosphogypsum, 25-50 parts of desulfurized gypsum, and 150 parts of lime; mix and grind the groups to obtain the expansion agent raw material;

[0007] S2. The expansion agent raw material obtained in step S1 is placed in a box furnace for calcination, and the holding time is 30-90min. After the calcination, the expansion agent clinker is obtained, and the clinker is a gray-black solid block; and,

[0008] S3. Grind the expansion agent clinker obtained in step S2 to obtain a gelling material expansion agent.

[0009] As a preferred solution of the preparation method and grinding equipment of the low-cost solid waste-based cementitious material expansion agent described in the present invention, the specific surface area of ​​the construction waste, coal gangue, fly ash, desulfurized gypsum, phosphogypsum and lime is 50-100m2 / kg.

[0010] As a preferred solution of the preparation method and grinding equipment of the low-cost solid waste-based gelling material expansion agent of the present invention, wherein: the calcination temperature is 1200-1300° C., and the calcination time is 6 hours.

[0011] The beneficial effects of the first implementation scheme of the present invention are as follows: the method uses coal gangue, fly ash and construction waste to replace bauxite, desulfurized gypsum and phosphogypsum to replace natural gypsum, and after adding a small amount of lime, all the materials are ground and mixed, and placed in a box furnace for calcination according to the designed ratio, the calcination temperature is controlled between 1200 and 1300°C, the calcination time is 6 hours, and the insulation time is 30-90 minutes; after calcination, a solid waste-based cementitious material expansion agent is obtained, which can reduce the emission of CO2 in the bauxite mining process and reduce the raw material cost of the cementitious material expansion agent; the materials used in the present invention are all industrial solid wastes, which greatly reduces the capital investment in the preparation cost, and reduces the pollution caused by industrial solid waste to the environment and saves land resources while absorbing a large amount of industrial solid waste. The preparation method described in the present invention has a simple process route, a wide source of raw materials, low production cost, and good economic, environmental and social benefits.

[0012] In view of the above existing problem that after grinding, there will be impurities remaining inside the machine.

[0013] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0014] As a preferred solution of the method for preparing the low-cost solid waste-based gelling material expansion agent and the grinding device of the present invention, wherein: the basic component includes a support assembly, a feeding assembly arranged on the support assembly, and a screening assembly arranged on the support assembly, and;

[0015] The control component includes a driving component arranged on the supporting component, a reciprocating component arranged on the driving component, and an impact component arranged on the supporting component.

[0016] As a preferred solution of the preparation method and grinding equipment of the low-cost solid waste-based cementitious material expansion agent described in the present invention, the support assembly includes a support base plate, support legs arranged on the support base plate, a protective shell arranged on the support legs, and a grinding module arranged on the protective shell.

[0017] As a preferred solution of the preparation method and grinding equipment of the low-cost solid waste-based cementitious material expansion agent described in the present invention, the feeding assembly includes a support plate arranged on the support leg, a feeding motor arranged on the support plate, a lower hopper arranged on the support leg, an upper hopper arranged on the protective shell, a feeding channel arranged between the lower hopper and the upper hopper, and a winch arranged inside the feeding channel.

[0018] As a preferred solution of the preparation method and grinding equipment of the low-cost solid waste-based cementitious material expansion agent described in the present invention, the screening assembly includes a cavity arranged inside the protective shell, a screening plate arranged inside the cavity, a guide plate arranged on the screening plate, a blocking block arranged inside the screening plate, and screening holes arranged between the blocking blocks.

[0019] As a preferred solution of the preparation method and grinding equipment of the low-cost solid waste-based cementitious material expansion agent described in the present invention, the driving assembly includes a placement plate arranged on the support leg, a driving motor arranged on the placement plate, and a driving rod arranged on the driving motor.

[0020] As a preferred solution of the preparation method and grinding equipment of the low-cost solid waste-based cementitious material expansion agent described in the present invention, the reciprocating component includes a slide groove arranged on the inner wall of the protective shell, a slide rail arranged inside the slide groove, a sliding block arranged on the inner wall of the slide rail, a moving ring arranged on the sliding block, a control block arranged on the moving ring, and a reciprocating spiral groove arranged on the outer wall of the driving rod.

[0021] As a preferred solution of the preparation method and grinding equipment of the low-cost solid waste-based cementitious material expansion agent described in the present invention, the impact assembly includes a groove arranged inside the protective shell, an impact rod arranged on the inner wall of the groove, an impact spring arranged at the top of the impact rod, a rotating plate arranged on the impact rod, a control plate arranged on the rotating plate, and a spring sheet arranged between the rotating plate and the control plate.

[0022] The beneficial effects of the present invention are as follows: the driving rod is controlled to rotate through the operation of the driving motor. When the driving rod rotates, the reciprocating spiral groove will drive the moving ring to realize up and down reciprocating operation through the control block, so that the sliding block drives the slide rail to realize movement, so that the left end of the screening plate swings up and down to perform screening work, and at the same time, larger particles will be discharged into the lower hopper through the outlet on the right side of the screening plate, and then the large particles of clinker will be sent to the upper hopper through the cooperation of the winch and the feeding channel to enter the grinding module for re-grinding, forming a cycle, thereby ensuring the uniform size of the particles, and at the same time, the screening plate will squeeze the control plate when moving upward, so that the control plate drives the rotating plate to rotate, so that the impact rod moves upward. When the screening plate and the control plate are separated, the impact rod will hit the protective shell under the action of the impact spring, thereby causing the expansion agent attached to the inner wall to be discharged from the device to prevent impurities from existing inside the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0024] Figure 1 It is a schematic diagram of the overall structure of the preparation method of the low-cost solid waste-based gelling material expansion agent and the grinding equipment of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the feeding component of the preparation method of the low-cost solid waste-based gelling material expansion agent and the grinding equipment of the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of the impact component of the low-cost solid waste-based gelling material expansion agent preparation method and grinding equipment of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the driving components of the method for preparing the low-cost solid waste-based gelling material expansion agent and the grinding equipment of the present invention.

[0028] Figure 5 It is a schematic diagram of the structure of the screening component of the preparation method of the low-cost solid waste-based gelling material expansion agent and the grinding equipment of the present invention.

[0029] Figure 6 It is a schematic diagram of the reciprocating component structure of the method for preparing the low-cost solid waste-based gelling material expansion agent and the grinding equipment of the present invention.

[0030] Figure 7 It is a schematic diagram of the internal structure of the feeding channel of the grinding equipment and the preparation method of the low-cost solid waste-based gelling material expansion agent of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Embodiment 1 is the first embodiment of the present invention, and provides a method for preparing a low-cost solid waste-based gelling material expansion agent, the method comprising:

[0036] S1. The ingredients are prepared in parts by weight as follows: 60-90 parts of coal gangue, 0-12 parts of fly ash, 50-68 parts of construction waste, 18-50 parts of phosphogypsum, 25-50 parts of desulfurized gypsum, and 150 parts of lime; the groups are mixed and ground to obtain a raw material of the expander;

[0037] Preferably, the mass fractions of Al2O3 and SiO2 in construction waste are 45%-60% and 25%-45% respectively, the mass fractions of CaO and SO3 in desulfurized gypsum and phosphogypsum are 35%-50% and 45%-60% respectively; the mass fractions of Al2O3 and SiO2 in coal gangue and fly ash are 20%-30% and 40%-53% respectively, and the mass fraction of CaO in lime is 90%-99%; the specific surface area of ​​the material after grinding is 300-400m2 / kg.

[0038] S2. The expansion agent raw material obtained in step S1 is placed in a box-type furnace for calcination, and the holding time is 30-90min. After the calcination, the expansion agent clinker is obtained, and the clinker is a gray-black solid block;

[0039] Preferably,

[0040] S3. Grind the expansion agent clinker obtained in step S2 to obtain a gelling material expansion agent.

[0041] Furthermore, the specific surface area of ​​construction waste, coal gangue, fly ash, desulfurized gypsum, phosphogypsum and lime is 50-100m2 / kg.

[0042] Preferably, the specific surface area of ​​the material in S1 after grinding is controlled to be 300-400m2 / kg.

[0043] Furthermore, the calcination temperature is 1200-1300° C., and the calcination time is 6 hours.

[0044] Preferably, the calcination in S2 is carried out in a box furnace, and the temperature needs to be controlled at 1200-1300° C., and the calcination time is maintained for 6 hours to ensure sufficient calcination.

[0045] In summary: this method uses coal gangue, fly ash, and construction waste to replace bauxite, and desulfurized gypsum and phosphogypsum to replace natural gypsum. After adding a small amount of lime, all the materials are ground and mixed, and placed in a box furnace for calcination according to the designed ratio. The calcination temperature is controlled between 1200 and 1300°C, the calcination time is 6 hours, and the insulation time is 30-90 minutes; after calcination treatment, a solid waste-based cementitious material expansion agent is obtained, which can reduce the emission of CO2 in the process of bauxite mining and reduce the raw material cost of the cementitious material expansion agent.

[0046] Example 2, reference Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7 , which is the second embodiment of the present invention, includes: a basic component 100, including a support assembly 101, a loading assembly 102 arranged on the support assembly 101, and a screening assembly 103 arranged on the support assembly 101, and; a control component 200, including a driving assembly 201 arranged on the support assembly 101, a reciprocating assembly 202 arranged on the driving assembly 201, and an impact assembly 203 arranged on the support assembly 101.

[0047] Among them, the support component 101 is used to support the entire grinding equipment so that the equipment can operate normally. The feeding component 102 is used to transport the clinker to be ground to the grinding module 101d for grinding. The screening component 103 is set to screen the ground clinker so that the materials that meet the standards are discharged from the equipment, and the materials that do not meet the standards are discharged into the feeding component 102 for grinding again.

[0048] In addition, the driving component 201 is used to control the operation of the reciprocating component 202. The reciprocating component 202 is configured to drive the left end of the screening component 103 to shake up and down, thereby assisting the screening component 103 in performing screening work. The impact component 203 is configured to impact the protective shell 101c, causing the entire device to vibrate, thereby assisting the device in discharging the abrasive.

[0049] Preferably, the reciprocating component 202 is controlled by the driving component 201 to drive the left end of the screening component 103 to shake, so that the screening component 103 discharges the materials that do not meet the standards into the feeding component 102 for re-grinding. When the screening component 103 is in operation, it will drive the impact component 203 to operate, so that the impact component 203 hits the protective shell 101c, so that the whole device vibrates, and the auxiliary equipment discharges the ground materials.

[0050] Furthermore, the support assembly 101 includes a support base plate 101a, support legs 101b disposed on the support base plate 101a, a protective shell 101c disposed on the support legs 101b, and a grinding module 101d disposed on the protective shell 101c.

[0051] The supporting bottom plate 101a and the supporting legs 101b are used to support the protective shell 101c, and the grinding module 101d is used to grind the baked clinker so that the particle size of the expander meets the standard.

[0052] Furthermore, the loading assembly 102 includes a support plate 102a arranged on the support leg 101b, a loading motor 102b arranged on the support plate 102a, a lower hopper 102c arranged on the support leg 101b, an upper hopper 102d arranged on the protective shell 101c, a feeding channel 102e arranged between the lower hopper 102c and the upper hopper 102d, and a winch 102f arranged inside the feeding channel 102e.

[0053] Among them, the support plate 102a is used to place the loading motor 102b, the lower hopper 102c is used to receive the clinker discharged from the screening component 103, the upper hopper 102d is used to feed the clinker into the grinding module 101d for grinding, and the feeding channel 102e and the winch 102f are used to feed the material in the lower hopper 102c into the upper hopper 102d.

[0054] Preferably, a feed port is provided at the bottom end of the feeding channel 102e, and the operation of the feeding motor 102b drives the winch 102f to rotate, so that the winch 102f sends the clinker entering the feeding channel 102e from the feed port into the upper hopper 102d, and enters the grinding module 101d for grinding the clinker. Thereafter, the ground material is screened through the screening component 103, so that unqualified materials enter the lower hopper 102c again to form a cycle.

[0055] Furthermore, the screening assembly 103 includes a cavity 103a disposed inside the protective shell 101c, a screening plate 103b disposed inside the cavity 103a, a guide plate 103c disposed on the screening plate 103b, a blocking block 103d disposed inside the screening plate 103b, and screening holes 103e disposed between the blocking blocks 103d.

[0056] Among them, the cavity 103a is set to facilitate the internal movement of the screening plate 103b, the guide plate 103c is set to prevent the abrasive from accumulating on the edge of the screening plate 103b, and the blocking block 103d is set to divide the abrasive when the left end of the screening assembly 103 is shaken up and down, so that the materials that meet the standards in the abrasive will not be carried into the lower hopper 102c by the non-compliant abrasive.

[0057] Preferably, after the abrasive enters the screening plate 103b, the screening plate 103b shakes up and down when the reciprocating assembly 202 operates. During the shaking, the blocking block 103d inside blocks the flow rate of the abrasive, so that the compliant abrasive can be discharged from the powder screening plate and will not be entrained into the lower hopper 102c.

[0058] In summary: the driving motor 201b is used to control the driving rod 201c to rotate. When the driving rod 201c rotates, the reciprocating spiral groove 202f will drive the moving ring 202d to reciprocate up and down through the control block 202e, so that the sliding block 202c drives the slide rail 202b to move, so that the left end of the screening plate 103b swings up and down to perform screening. At the same time, larger particles will be discharged into the lower hopper 102c through the outlet on the right side of the screening plate 103b, and then the large particles of clinker will be sent to the upper hopper 102d through the cooperation of the winch 102f and the feeding channel 102e to enter the grinding module 101d for re-grinding, forming a cycle, thereby ensuring the uniform size of the particles.

[0059] Example 3, reference Figure 3 to Figure 6 , which is the third embodiment of the present invention, includes: the driving assembly 201 includes a storage plate 201a arranged on the supporting leg 101b, a driving motor 201b arranged on the storage plate 201a, and a driving rod 201c arranged on the driving motor 201b.

[0060] The storage plate 201a is used to fix the driving motor 201b so that the driving motor 201b can operate normally. The driving motor 201b is used to drive the driving rod 201c to rotate.

[0061] Furthermore, the reciprocating assembly 202 includes a slide groove 202a arranged on the inner wall of the protective shell 101c, a slide rail 202b arranged inside the slide groove 202a, a sliding block 202c arranged on the inner wall of the slide rail 202b, a moving ring 202d arranged on the sliding block 202c, a control block 202e arranged on the moving ring 202d, and a reciprocating spiral groove 202f arranged on the outer wall of the driving rod 201c.

[0062] Among them, the setting of the sliding groove 202a is used to facilitate the sliding of the sliding rail 202b inside, the setting of the sliding block 202c is used to cooperate with the sliding rail 202b to drive the moving ring 202d to move up and down, and the setting of the control block 202e is used to cooperate with the reciprocating spiral groove 202f to drive the moving ring 202d to move up and down, thereby enabling the sliding rail 202b to move.

[0063] Preferably, the driving rod 201c is driven to rotate by electric operation, thereby causing the reciprocating spiral groove 202f on the driving rod 201c to rotate. When the reciprocating spiral groove 202f rotates, it drives the control block 202e to move, so that the sliding block 202c drives the slide rail 202b to shake, thereby driving the left end of the screening plate 103b to shake up and down through the slide rail 202b.

[0064] Furthermore, the impact assembly 203 includes a groove 203a arranged inside the protective shell 101c, an impact rod 203b arranged on the inner wall of the groove 203a, an impact spring 203c arranged on the top of the impact rod 203b, a rotating plate 203d arranged on the impact rod 203b, a control plate 203e arranged on the rotating plate 203d, and a spring plate 203f arranged between the rotating plate 203d and the control plate 203e.

[0065] Among them, the groove 203a is set to prevent the impact rod 203b and the rotating plate 203d, the impact rod 203b is set to hit the protective shell 101c, so that the entire device is vibrated, which is convenient for the abrasive material discharge equipment, the impact spring 203c is used to push the impact rod 203b to move downward, the control plate 203e is set to facilitate the screening plate 103b to drive the rotating plate 203d to rotate, and the spring 203f is set to push the control plate 203e to rotate to the right.

[0066] Preferably, when the screening plate 103b moves upward, it will squeeze the control plate 203e, and the impact rod 203b will be at the bottom of the groove 203a and cannot rotate. The control plate 203e will rotate upward without affecting the impact rod 203b. When the screening plate 103b moves downward, it will contact the control plate 203e again. The bottom end protrusion of the control plate 203e pushes the rotating plate 203d to rotate, so that the rotating plate 203d will drive the impact rod 203b to move upward. When the screening plate 103b and the control plate 203e are disengaged, the impact spring 203c will push the impact rod 203b to move downward, thereby causing the entire device to vibrate.

[0067] In summary: the driving rod 201c is controlled to rotate by the operation of the driving motor 201b. When the driving rod 201c rotates, the reciprocating spiral groove 202f drives the moving ring 202d to reciprocate up and down through the control block 202e, so that the sliding block 202c drives the slide rail 202b to move, so that the left end of the screening plate 103b swings up and down to perform screening. At the same time, larger particles will be discharged into the lower hopper 102c through the outlet on the right side of the screening plate 103b, and then the large particles of clinker will be discharged through the cooperation of the winch 102f and the feeding channel 102e. It is sent to the upper hopper 102d and enters the grinding module 101d for re-grinding to form a cycle, thereby ensuring that the size of the particles is uniform. At the same time, when the screening plate 103b moves upward, it will squeeze the control plate 203e, so that the control plate 203e drives the rotating plate 203d to rotate, thereby causing the impact rod 203b to move upward. When the screening plate 103b and the control plate 203e are separated, the impact rod 203b will hit the protective shell 101c under the action of the impact spring 203c, thereby causing the expansion agent attached to the inner wall to be discharged from the device to prevent impurities from existing inside the equipment.

[0068] The remaining structure is the same as that of Example 2.

[0069] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0070] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for preparing a low-cost solid waste-based gelling material expansion agent, Features: include, S1. The ingredients are prepared in parts by weight as follows: 60-90 parts of coal gangue, 0-12 parts of fly ash, 50-68 parts of construction waste, 18-50 parts of phosphogypsum, 25-50 parts of desulfurized gypsum, and 150 parts of lime; the groups are mixed and ground to obtain a raw material of the expander; S2. The expansion agent raw material obtained in step S1 is placed in a box furnace for calcination, and the holding time is 30-90min. After the calcination, the expansion agent clinker is obtained, and the clinker is a gray-black solid block; and, S3. Grind the expansion agent clinker obtained in step S2 to obtain a gelling material expansion agent.

2. The method for preparing the low-cost solid waste-based gelling material expansion agent according to claim 1, Features: The specific surface area of ​​the construction waste, coal gangue, fly ash, desulfurized gypsum, phosphogypsum and lime is 50-100m2 / kg.

3. The method for preparing the low-cost solid waste-based gelling material expansion agent according to claim 2, Features: The calcination temperature is 1200-1300°C, and the calcination time is 6 hours.

4. A grinding device, which is mainly used in the method for preparing a low-cost solid waste-based gelling material expansion agent according to any one of claims 1 to 3, comprising: A basic component (100) comprises a support assembly (101), a loading assembly (102) arranged on the support assembly (101), and a screening assembly (103) arranged on the support assembly (101), and; The control component (200) comprises a driving component (201) arranged on the supporting component (101), a reciprocating component (202) arranged on the driving component (201), and an impact component (203) arranged on the supporting component (101).

5. The grinding device according to claim 4, Features: The support assembly (101) comprises a support base plate (101a), support legs (101b) arranged on the support base plate (101a), a protective shell (101c) arranged on the support legs (101b), and a grinding module (101d) arranged on the protective shell (101c).

6. The grinding device according to claim 5, Features: The feeding assembly (102) comprises a support plate (102a) arranged on the support leg (101b), a feeding motor (102b) arranged on the support plate (102a), a lower hopper (102c) arranged on the support leg (101b), an upper hopper (102d) arranged on the protective shell (101c), a feeding channel (102e) arranged between the lower hopper (102c) and the upper hopper (102d), and a winch (102f) arranged inside the feeding channel (102e).

7. The grinding device according to claim 6, Features: The screening assembly (103) comprises a cavity (103a) arranged inside the protective shell (101c), a screening plate (103b) arranged inside the cavity (103a), a guide plate (103c) arranged on the screening plate (103b), a blocking block (103d) arranged inside the screening plate (103b), and screening holes (103e) arranged between the blocking blocks (103d).

8. The grinding device according to claim 7, Features: The driving assembly (201) comprises a storage plate (201a) arranged on the supporting leg (101b), a driving motor (201b) arranged on the storage plate (201a), and a driving rod (201c) arranged on the driving motor (201b).

9. The grinding device according to claim 8, Features: The reciprocating assembly (202) comprises a slide groove (202a) arranged on the inner wall of the protective shell (101c), a slide rail (202b) arranged inside the slide groove (202a), a sliding block (202c) arranged on the inner wall of the slide rail (202b), a moving ring (202d) arranged on the sliding block (202c), a control block (202e) arranged on the moving ring (202d), and a reciprocating spiral groove (202f) arranged on the outer wall of the driving rod (201c).

10. The grinding device according to claim 9, Features: The impact assembly (203) comprises a groove (203a) arranged inside the protective shell (101c), an impact rod (203b) arranged on the inner wall of the groove (203a), an impact spring (203c) arranged at the top of the impact rod (203b), a rotating plate (203d) arranged on the impact rod (203b), a control plate (203e) arranged on the rotating plate (203d), and a spring sheet (203f) arranged between the rotating plate (203d) and the control plate (203e).

Images