Building gypsum powder production process and equipment

Abstract

The invention relates to the technical field of gypsum powder production, and discloses a building gypsum powder production process which comprises the following steps: S1, preparing materials including 50-80 parts of phosphogypsum, 5-7 parts of a crystal modifier, 6-9 parts of an activating agent, 20-30 parts of oxide and the like; the invention further provides building gypsum powder production equipment which comprises a shell, and two fixing blocks are fixedly connected to one side of the shell. The prepared gypsum powder is high in cold-resistant strength, large in porosity and remarkable in heat preservation effect, the grain composition, the adhesive property, the flowing property, the setting time and the like of the gypsum powder are improved, the whole preparation process is simple, industrial waste is fully utilized, the environment is protected, natural gypsum resources are saved, the curing process of the gypsum powder can be accelerated, and the compressive strength can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gypsum powder production, and particularly to a production process and equipment for building gypsum powder. Background Art

[0002] Gypsum powder is a common building material and is also used in the art and medical fields. It is a white powdery substance, and its main component is calcium sulfate hydrate. Gypsum powder can be mixed with water to form a highly plastic gypsum slurry, which is used to make various building components, sculptures, models, gypsum boards, etc.

[0003] At present, a small amount of phosphogypsum is used in the production of cement, sulfuric acid, soil improvement, etc., while a large amount is used in the production of building materials. The utilization method is to wash phosphogypsum with water, add additives, separate, dry, and then calcine at high temperature to remove free water and part of the crystal water to obtain β - hemihydrate gypsum (CaSO4·0.5H2O), and then obtain building gypsum powder through grinding. This is a method widely used in society at present. However, the gypsum products made from the gypsum powder produced by this method have the following drawbacks:

[0004] First, the flexural and compressive strengths are low and cannot fully meet the strength requirements of the products.

[0005] Second, the water resistance is poor and the softening coefficient is low. If used in a water - sprayed and humid environment, it will pose a potential safety hazard to the building.

[0006] Third, the initial setting time is too short, which brings inconvenience to construction. If a retarder is added, it will increase the cost and reduce the strength. Summary of the Invention

[0007] (1) Technical Problems to be Solved

[0008] Aiming at the deficiencies of the prior art, the present invention provides a production process and equipment for building gypsum powder, mainly to solve the problems that the existing flexural and compressive strengths are low and cannot fully meet the strength requirements of the products, the water resistance is poor and the softening coefficient is low, which will pose a potential safety hazard to the building if used in a water - sprayed and humid environment, and the initial setting time is too short, which brings inconvenience to construction. If a retarder is added, it will increase the cost and reduce the strength.

[0009] (2) Technical Solutions

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A production process for building gypsum powder includes the following steps:

[0012] S1: Prepare materials, including 50 - 80 parts of phosphogypsum, 5 - 7 parts of crystal conversion agent, 6 - 9 parts of activator, 20 - 30 parts of oxide, 10 - 15 parts of hardener, 12 - 15 parts of mineral filler, 6 - 8 parts of cement ash, 6 - 8 parts of polymer emulsion, 7 - 9 parts of cellulose, 5 - 8 parts of hydroxy silicone oil, 7 - 9 parts of β - cyclodextrin, and 3 - 5 parts of γ - hexachlorocyclohexane;

[0013] S2: Sun - dry and grind, place the phosphogypsum in the open air to sun - dry and remove the contained moisture, and then crush it into phosphogypsum powder with a mesh size of 50 - 70 by a Raymond mill;

[0014] S3: Pickling, spray hydroxy silicone oil on the crushed phosphogypsum powder in S2, and then neutralize it with clean water to neutrality to obtain pickled phosphogypsum;

[0015] S4: Material processing, dissolve the raw material components of the crystal conversion agent in water to prepare an aqueous solution, and then grind the raw materials of the activator into powders with a fineness of 0.08 - 0.10 mm and mix them;

[0016] S5: Stir and mix, mix the pickled phosphogypsum in S3 with cellulose evenly, then gradually add the polymer emulsion to the mixed gypsum powder and cellulose, continue to stir and mix, and then gradually add the activator, oxide, hardener, cement ash, and mineral filler, and continue to stir until uniform to obtain semi - finished phosphogypsum;

[0017] S6: Secondary mixing, break up the semi - finished phosphogypsum in S5 into powders with a particle size of 5 - 6 mm, and then add the phosphogypsum powder, crystal conversion agent aqueous solution, β - cyclodextrin, and γ - hexachlorocyclohexane into a pan mixer in sequence, fully roll and mix them, and then seal and cure for 24 h;

[0018] S7: Grinding, first coarsely crush the gypsum powder in S6 by a hammer mill, then moderately grind the crushed raw materials by a Raymond mill for the second time, and finally finely grind them ultrasonically by an ultrasonic mill to obtain finished gypsum powder;

[0019] S8: Screening, screen the gypsum powder in S7 through equipment, and then grind the screened gypsum powder for the second time.

[0020] Furthermore, the crystal conversion agent is any one or more of aluminum sulfate, ferric sulfate, and sodium sulfate, and the activator is any one or more of slag, cement, quicklime, alum slag, and bauxite.

[0021] On the basis of the foregoing solution, the cellulose is any one of glass fiber, carbon fiber, or polypropylene fiber, the polymer emulsion is any one of acrylic emulsion or polyethylene emulsion, and the oxide is any one of aluminum oxide or iron oxide.

[0022] As a further solution of the present invention, the hardener is any one of calcium chloride or aluminum sulfate, and the mineral filler is any one of quartz sand or perlite powder.

[0023] Furthermore, the ultrasonic pulverizer is an ultrasonic vibration pulverizer, and the particle size after pulverization is 0.0003 - 0.0002 mm.

[0024] The present invention also provides a building gypsum powder production device, including a housing. One side of the housing is fixedly connected with two fixing blocks. Second chutes are opened on one side of the two fixing blocks. A baffle is slidably connected in the two second chutes. A convex block is fixedly connected to the bottom of the baffle. A round hole is opened on the upper surface of the convex block. A cylinder is fixedly connected in the round hole. A pull rod is slidably connected in the cylinder. A limiting plate is fixedly connected to the outer wall of the pull rod. A tension spring is fixedly connected to one side of the limiting plate, and one end of the tension spring is fixed to the baffle. Two insertion holes are opened on one side of the housing, and the pull rod can be inserted into the insertion holes. A sieve is fixedly connected in the housing, and the sieve is inclined in the housing. A feeding port is opened on one side of the housing, and the baffle can block the feeding port. A material collecting component for collecting the sieved gypsum powder is arranged in the housing.

[0025] On the basis of the foregoing solution, the material collecting component includes a first collecting box which slides in the housing. First chutes are opened on both sides of the housing, and the first collecting box slides in the first chutes. A funnel is fixedly connected to the top of the housing, and the width of the bottom of the funnel matches the width of the top of the housing. A vibration motor is fixedly connected to one side of the housing, and a protective housing is fixedly connected to one side of the housing, and the vibration motor is located in the protective housing.

[0026] As a further solution of the present invention, a second collecting box is fixedly connected to one side of the baffle, and bevels are opened on one side of the baffle and the second collecting box. The fixed end of a buckle is fixedly connected to one side of the housing above the first collecting box, and the movable end of the buckle is fixedly connected to one side of the first collecting box.

[0027] (III) Beneficial effects

[0028] Compared with the prior art, the present invention provides a building gypsum powder production process and device, having the following beneficial effects:

[0029] 1. The gypsum powder prepared by the present invention has high cold resistance strength, large porosity, and remarkable heat preservation effect. Its particle size distribution, bonding performance, fluidity, setting time, etc. are improved. The whole preparation process is simple, fully utilizes industrial waste, protects the environment, and saves natural gypsum resources.

[0030] 2. By adding polymer emulsion, cellulose, and cement ash, the present invention can increase the adhesiveness and toughness of gypsum powder. By adding mineral fillers, the compactness and stability of gypsum powder can be improved. By adding hardeners, the curing process of gypsum powder can be accelerated, and the compressive strength can be increased.

[0031] 3. By adding activators, the present invention can promote the hydration reaction of gypsum. By adding oxides, the wear resistance and corrosion resistance of gypsum powder can be increased. By adding various additives, the overall durability, strength, structural stability, and application range of gypsum powder can be improved.

[0032] 4. The present invention is provided with a baffle. There is a blanking port on one side of the housing, and a baffle is provided on one side of the blanking port. Impurities in the gypsum powder will fall on one side of the blanking port and the baffle. Pull the baffle to make the impurities fall, so as to meet the cleaning of impurities on the screen mesh, without disassembling the filter screen, reducing the equipment downtime, and increasing the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of the production process of a building gypsum powder production process proposed by the present invention;

[0034] Figure 2 is a three-dimensional structural diagram of a building gypsum powder production equipment proposed by the present invention;

[0035] Figure 3 is a rear structural diagram of a building gypsum powder production equipment proposed by the present invention;

[0036] Figure 4 is a side structural diagram of a building gypsum powder production equipment proposed by the present invention;

[0037] Figure 5 is a partial enlarged structural diagram of a building gypsum powder production equipment proposed by the present invention.

[0038] In the figure: 1, housing; 2, screen mesh; 3, funnel; 4, fixed block; 5, jack; 7, first collection box; 8, protective shell; 9, vibration motor; 10, buckle; 11, second collection box; 12, first chute; 13, second chute; 14, blanking port; 15, pull rod; 16, limiting plate; 17, tension spring; 18, cylinder; 19, baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Example 1

[0041] Reference Figures 1-5 , a production process of building gypsum powder, comprising the following steps:

[0042] S1: Prepare materials, including 50 parts of phosphogypsum, 5 parts of crystallization agent, 6 parts of activator, 20 parts of oxide, 10 parts of hardener, 12 parts of mineral filler, 6 parts of cement ash, 6 parts of polymer emulsion, 7 parts of cellulose, 5 parts of hydroxy silicone oil, 7 parts of β-cyclodextrin and 3 parts of γ-hexachlorocyclohexane;

[0043] S2: drying and grinding, placing the phosphogypsum in the open air to dry, remove the moisture contained therein, and crushing it into 50 mesh phosphogypsum powder by Raymond mill;

[0044] S3: pickling, spraying hydroxy silicone oil on the crushed phosphogypsum powder in S2, and then neutralizing it with clean water to obtain pickled phosphogypsum;

[0045] S4: Material processing, dissolving the raw material components of the crystal conversion agent in water to prepare an aqueous solution, and then grinding the raw materials of the activator into powders with a fineness of 0.08 mm and mixing them;

[0046] S5: stirring and mixing, after the acid-washed phosphogypsum in S3 is evenly mixed with cellulose, the polymer emulsion is gradually added to the mixed gypsum powder and cellulose, and the stirring and mixing is continued, and then the activator, oxide, hardener, cement ash and mineral filler are gradually added, and the stirring is continued until uniform to obtain a semi-finished phosphogypsum. By adding the polymer emulsion, cellulose and cement ash, the adhesion and toughness of the gypsum powder can be increased, by adding the mineral filler, the density and stability of the gypsum powder can be improved, by adding the hardener, the curing process of the gypsum powder can be accelerated, and the compressive strength can be improved, by adding the activator, the hydration reaction of the gypsum can be promoted, by adding the oxide, the wear resistance and corrosion resistance of the gypsum powder can be increased, and by adding a variety of additives, the overall durability, strength, structural stability and scope of use of the gypsum powder can be improved;

[0047] S6: secondary mixing, breaking up the semi-finished phosphogypsum in S5 into powder with a particle size of 5 mm, then sequentially adding the phosphogypsum powder, the crystal conversion agent aqueous solution, β-cyclodextrin and γ-hexachlorocyclohexane into a wheel mixer, fully rolling and mixing, and sealing and aging for 24 hours;

[0048] S7: Grinding, and then the gypsum powder in S6 is subjected to primary coarse grinding by a hammer mill, the raw material after grinding is subjected to secondary medium grinding by a Raymond mill, and finally subjected to ultrasonic tertiary fine grinding by an ultrasonic pulverizer to obtain a finished gypsum powder;

[0049] S8: Screening. The gypsum powder in S7 is screened by equipment, and then the screened gypsum powder is ground for a second time. The gypsum powder prepared by the present invention has high cold resistance strength, large porosity, and remarkable heat preservation effect. Its particle size distribution, bonding performance, fluidity, setting time, etc. are improved. The whole preparation process is simple, making full use of industrial waste, protecting the environment, and saving natural gypsum resources.

[0050] In the present invention, the crystal modifier is ferric sulfate and sodium sulfate, the activator is quicklime, alumina residue and bauxite, the cellulose is polypropylene fiber, the polymer emulsion is polyethylene emulsion, the oxide is iron oxide, the hardener is aluminum sulfate, the mineral filler is perlite powder, and the ultrasonic crusher is an ultrasonic vibration crusher, and the particle size after crushing is 0.0003 mm.

[0051] The present invention also provides a building gypsum powder production device, including a housing 1. Two fixing blocks 4 are welded to one side of the housing 1. Second chutes 13 are opened on one side of each of the two fixing blocks 4. A baffle 19 is slidably connected in the two second chutes 13. A convex block is welded to the bottom of the baffle 19. A round hole is opened on the upper surface of the convex block, and a cylinder 18 is welded in the round hole. A pull rod 15 is slidably connected in the cylinder 18. A limiting plate 16 is welded to the outer wall of the pull rod 15. A tension spring 17 is welded to one side of the limiting plate 16, and one end of the tension spring 17 is fixed to the baffle 19. Two jacks 5 are opened on one side of the housing 1, and the pull rod 15 can be inserted into the jacks 5. A screen 2 is fixed in the housing 1 by bolts, and the screen 2 is inclined in the housing 1. A discharge port 14 is opened on one side of the housing 1 at the bottom of the slope of the screen 2, and the baffle 19 can block the discharge port 14. During use, the unfiltered gypsum powder is placed on the screen 2 in the housing 1. Since the screen 2 is inclined in the housing 1, the screened impurities will fall on the discharge port 14 along the slope of the screen 2 and be blocked by the baffle 19. When the impurities accumulate to a certain extent, the pull rod 15 is pulled out from one of the jacks 5. At this time, the pull rod 15 is pulled downward to insert it into the other jack 5. At this time, the baffle 19 follows the pull rod 15 to move downward, and the discharge port 14 is not blocked by the baffle 19. At this time, the accumulated impurities will fall out of the device, so as to meet the cleaning of the impurities on the screen 2, without disassembling the filter screen, reducing the equipment downtime and increasing the screening efficiency;

[0052] In the present invention, a material collection component for collecting the screened gypsum powder is provided in the housing 1. The material collection component includes a first collection box 7. The first collection box 7 slides in the housing 1. First chutes 12 are opened on both sides of the housing 1, and the first collection box 7 slides in the first chutes 12, enabling the screened gypsum powder to fall into the first collection box 7. Then, the first collection box 7 is pulled out to centrally process the gypsum powder, improving the collection and processing efficiency of the screened gypsum powder;

[0053] Particularly, a funnel 3 is welded to the top of the housing 1, and the width of the bottom of the funnel 3 matches the width of the top of the housing 1, enabling the material to smoothly enter the interior of the housing 1 from the funnel 3, avoiding spillage during the material screening or feeding process. A vibration motor 9 is fixed to one side of the housing 1 by bolts, capable of generating a vibration force for the entire device to increase the fluidity of the material. A protective housing 8 is fixed to one side of the housing 1 by bolts, and the vibration motor 9 is located inside the protective housing 8, which can reduce the influence of the external environment on the vibration motor 9 and extend its service life;

[0054] One side of the baffle 19 is fixed with a second collection box 11 by bolts. When impurities fall from the discharge opening 14, they will enter the second collection box 11, so as to centrally clean the impurities, improving the working efficiency of equipment impurity cleaning. Both the baffle 19 and one side of the second collection box 11 are provided with bevels. When the impurities pass through, the bevel setting can guide the impurities into the second collection box 11, avoiding scattering or splashing. The fixed end of a buckle 10 is fixed to one side of the housing 1 above the first collection box 7 by bolts, and the movable end of the buckle 10 is fixed to one side of the first collection box 7 by bolts, enabling the movable end of the buckle 10 to be separated from the fixed end, and then pulling out the first collection box 7 for the convenience of taking out and cleaning the first collection box 7.

[0055] Working principle: When it is necessary to screen gypsum powder, put the gypsum powder into the funnel 3 and start the vibration motor 9. At this time, the vibration motor 9 will vibrate the housing 1, and the housing 1 will vibrate the sieve mesh 2, thereby screening the gypsum powder. The screened gypsum powder will enter the first collection box 7. Then open the buckle 10 and pull out the first collection box 7. When it is necessary to clean the impurities remaining on the sieve mesh 2, pull the pull rod 15 out of one of the jacks 5. At this time, pull the pull rod 15 downward to insert it into the other jack 5. At this time, due to the pulling force of the tension spring 17, one end of the pull rod 15 will tightly insert into the jack 5. At this time, the baffle 19 moves downward with the pull rod 15, and the discharge opening 14 is not blocked by the baffle 19. Due to the vibration of the vibration motor 9, the impurities on the sieve mesh 2 will move along the slope of the sieve mesh 2 towards the discharge opening 14. At this time, the impurities will fall into the second collection box 11, thus meeting the cleaning of the impurities on the sieve mesh 2, eliminating the need to disassemble the filter screen, reducing the equipment downtime, and increasing the screening efficiency.

[0056] Embodiment 2

[0057] Refer to Figures 1-5 , a building gypsum powder production process, including the following steps:

[0058] S1: Prepare materials, including 80 parts of phosphogypsum, 7 parts of crystal conversion agent, 9 parts of activator, 30 parts of oxide, 15 parts of hardener, 15 parts of mineral filler, 8 parts of cement ash, 8 parts of polymer emulsion, 9 parts of cellulose, 8 parts of hydroxy silicone oil, 9 parts of β-cyclodextrin, and 5 parts of γ-hexachlorocyclohexane;

[0059] S2: Sun-dry and grind into powder. Place the phosphogypsum in the open air to sun-dry to remove the contained moisture, and then crush it into 70-mesh phosphogypsum powder by a Raymond mill;

[0060] S3: Pickling. Spray hydroxy silicone oil on the crushed phosphogypsum powder in S2, and then neutralize it with clear water to neutrality to obtain pickled phosphogypsum;

[0061] S4: Material processing. Dissolve the raw material components of the crystal conversion agent in water to prepare an aqueous solution, and then grind the raw materials of the activator into powders with a fineness of 0.10 mm and mix them;

[0062] S5: Stir and mix. After mixing the pickled phosphogypsum in S3 and cellulose evenly, gradually add the polymer emulsion to the mixed gypsum powder and cellulose, continue to stir and mix, and then gradually add the activator, oxide, hardener, cement ash, and mineral filler, and continue to stir until uniform to obtain semi-finished phosphogypsum. By adding polymer emulsion, cellulose, and cement ash, the adhesiveness and toughness of the gypsum powder can be increased. By adding mineral filler, the compactness and stability of the gypsum powder can be improved. By adding hardener, the curing process of the gypsum powder can be accelerated and the compressive strength can be improved. By adding activator, the hydration reaction of gypsum can be promoted. By adding oxide, the wear resistance and corrosion resistance of the gypsum powder can be increased. By adding various additives, the overall durability, strength, structural stability, and application range of the gypsum powder can be improved;

[0063] S6: Secondary mixing. Break up the semi-finished phosphogypsum in S5 into powders with a particle size of 6 mm, and then add the phosphogypsum powder, crystal conversion agent aqueous solution, β-cyclodextrin, and γ-hexachlorocyclohexane into a pan mixer in sequence. After fully rolling and mixing, seal and cure for 24 h;

[0064] S7: Grinding. Then, first coarsely crush the gypsum powder in S6 by a hammer mill, and the crushed raw materials are moderately ground in a Raymond mill for the second stage, and finally ultrasonically finely ground by an ultrasonic mill to obtain finished gypsum powder;

[0065] S8: Screening. Screen the gypsum powder in S7 through equipment, and then perform secondary grinding on the screened gypsum powder. The gypsum powder prepared by the present invention has high cold resistance strength, large porosity, and remarkable heat preservation effect, and its particle size distribution, bonding performance, fluidity, setting time, etc. are improved. The whole preparation process is simple, making full use of industrial waste, protecting the environment, and saving natural gypsum resources.

[0066] In the present invention, the crystal conversion agent is aluminum sulfate and iron sulfate, the activator is slag, cement, and quicklime, the cellulose is glass fiber, the polymer emulsion is acrylic emulsion, the oxide is alumina, the hardening agent is calcium chloride, the mineral filler is quartz sand, and the ultrasonic crusher is an ultrasonic vibration crusher, and the particle size after crushing is 0.0002 mm.

[0067] The present invention also provides a building gypsum powder production device, which includes a housing 1. Two fixing blocks 4 are welded on one side of the housing 1. Second chutes 13 are provided on one side of each of the two fixing blocks 4. A baffle 19 is slidably connected in the two second chutes 13. A convex block is welded to the bottom of the baffle 19. A round hole is provided on the upper surface of the convex block. A cylinder 18 is welded in the round hole. A pull rod 15 is slidably connected in the cylinder 18. A limiting plate 16 is welded to the outer wall of the pull rod 15. A tension spring 17 is welded to one side of the limiting plate 16, and one end of the tension spring 17 is fixed to the baffle 19. Two jacks 5 are provided on one side of the housing 1, and the pull rod 15 can be inserted into the jacks 5. A screen 2 is fixed in the housing 1 by bolts, and the screen 2 is inclined in the housing 1. A discharge port 14 is provided on one side of the housing 1 at the bottom of the slope of the screen 2, and the baffle 19 can block the discharge port 14. During use, the unfiltered gypsum powder is placed on the screen 2 in the housing 1. Since the screen 2 is inclined in the housing 1, the screened impurities will fall into the discharge port 14 along the slope of the screen 2 and be blocked by the baffle 19. When the impurities accumulate to a certain extent, the pull rod 15 is pulled out from one of the jacks 5. At this time, the pull rod 15 is pulled downward to insert it into the other jack 5. At this time, the baffle 19 follows the pull rod 15 to move downward, and the discharge port 14 is not blocked by the baffle 19. At this time, the accumulated impurities will fall out of the device, so as to satisfy the cleaning of the impurities on the screen 2, without disassembling the filter screen, reducing the equipment downtime and increasing the screening efficiency;

[0068] In the present invention, a material receiving assembly for collecting the screened gypsum powder is provided in the housing 1. The material receiving assembly includes a first collecting box 7. The first collecting box 7 slides in the housing 1. First chutes 12 are provided on both sides of the housing 1, and the first collecting box 7 slides in the first chutes 12, which can enable the screened gypsum powder to fall into the first collecting box 7. Then, the first collecting box 7 is pulled out to centrally process the gypsum powder, improving the collection and processing efficiency of the screened gypsum powder;

[0069] Particularly, a funnel 3 is welded to the top of the housing 1, and the width of the bottom of the funnel 3 matches the width of the top of the housing 1, enabling the material to smoothly enter the interior of the housing 1 from the funnel 3, avoiding spillage during the material screening or feeding process. A vibration motor 9 is fixed to one side of the housing 1 by bolts, enabling the entire device to generate vibration force and increasing the fluidity of the material. A protective housing 8 is fixed to one side of the housing 1 by bolts, and the vibration motor 9 is located inside the protective housing 8, which can reduce the influence of the vibration motor 9 from the external environment and improve its service life;

[0070] One side of the baffle 19 is fixed with a second collection box 11 by bolts, enabling impurities to enter the second collection box 11 when falling from the discharge opening 14, thereby centrally cleaning the impurities and improving the working efficiency of the equipment for impurity cleaning. Both the baffle 19 and one side of the second collection box 11 are provided with bevels, which can guide the impurities into the second collection box 11 when the impurities pass through, avoiding scattering or splashing. The fixed end of a buckle 10 is fixed to one side of the housing 1 above the first collection box 7 by bolts, and the movable end of the buckle 10 is fixed to one side of the first collection box 7 by bolts, enabling the movable end of the buckle 10 to be separated from the fixed end, and then pulling out the first collection box 7, which is convenient for the removal and cleaning of the first collection box 7.

[0071] Working principle: When it is necessary to screen gypsum powder, the gypsum powder is put into the funnel 3, and the vibration motor 9 is started. At this time, the vibration motor 9 will vibrate the housing 1, and the housing 1 will vibrate the screen 2, thereby screening the gypsum powder. The screened gypsum powder will enter the first collection box 7. Subsequently, the buckle 10 is opened and the first collection box 7 is pulled out. When it is necessary to clean the impurities remaining on the screen 2, the pull rod 15 is pulled out from one of the jacks 5. At this time, the pull rod 15 is pulled downward to insert it into the other jack 5. At this time, due to the pulling force of the tension spring 17, one end of the pull rod 15 will tightly insert into the jack 5. At this time, the baffle 19 moves downward following the pull rod 15, and the discharge opening 14 is not blocked by the baffle 19. Due to the vibration of the vibration motor 9, the impurities on the screen 2 will move along the inclined surface of the screen 2 towards the discharge opening 14. At this time, the impurities will fall into the second collection box 11, thereby meeting the cleaning of the impurities on the screen 2, without disassembling the filter screen, reducing the equipment downtime, and increasing the screening efficiency.

[0072] In the description in this document, it should be noted that relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

Claims

1. A process for producing building gypsum powder, characterized in that: The following steps are involved: S1: prepare materials, including 50-80 parts of phosphogypsum, 5-7 parts of crystallization agent, 6-9 parts of activator, 20-30 parts of oxide, 10-15 parts of hardener, 12-15 parts of mineral filler, 6-8 parts of cement ash, 6-8 parts of polymer emulsion, 7-9 parts of cellulose, 5-8 parts of hydroxy silicone oil, 7-9 parts of β-cyclodextrin and 3-5 parts of γ-hexachlorocyclohexane; S2: drying and grinding, placing the phosphogypsum in the open air to dry, remove the moisture contained therein, and crushing it into 50-70 mesh phosphogypsum powder by Raymond mill; S3: pickling, spraying hydroxy silicone oil on the crushed phosphogypsum powder in S2, and then neutralizing it with clean water to obtain pickled phosphogypsum; S4: Material processing, dissolving the raw material components of the crystal conversion agent in water to prepare an aqueous solution, and then grinding the raw materials of the activator into powders with a fineness of 0.08-0.10mm and mixing them; S5: stirring and mixing, after the acid-washed phosphogypsum in S3 and the cellulose are evenly mixed, the polymer emulsion is gradually added to the mixed gypsum powder and cellulose, and the stirring and mixing is continued, and then the activator, oxide, hardener, cement ash and mineral filler are gradually added, and the stirring is continued until uniform, so as to obtain a semi-finished phosphogypsum; S6: secondary mixing, breaking up the semi-finished phosphogypsum in S5 into powder with a particle size of 5-6 mm, then adding the phosphogypsum powder, the crystal conversion agent aqueous solution, β-cyclodextrin and γ-hexachlorocyclohexane into a wheel mixer in sequence, fully rolling and mixing, and sealing and aging for 24 hours; S7: Grinding, and then the gypsum powder in S6 is subjected to primary coarse grinding by a hammer mill, the raw material after grinding is subjected to secondary medium grinding by a Raymond mill, and finally subjected to ultrasonic tertiary fine grinding by an ultrasonic pulverizer to obtain a finished gypsum powder; S8: Screening: the gypsum powder in S7 is screened by the equipment, and then the screened gypsum powder is ground again.

2. A process for producing building gypsum powder according to claim 1, characterized in that: The crystal-changing agent is any one or more of aluminum sulfate, iron sulfate and sodium sulfate, and the activator is any one or more of slag, cement, quicklime, alum residue and high-alumina.

3. A process for producing building gypsum powder according to claim 2, characterized in that: The cellulose is any one of glass fiber, carbon fiber or polypropylene fiber, the polymer emulsion is any one of acrylic emulsion or polyethylene emulsion, and the oxide is any one of aluminum oxide or iron oxide.

4. A process for producing building gypsum powder according to claim 3, characterized in that: The hardener is any one of calcium chloride or aluminum sulfate, and the mineral filler is any one of quartz sand or pearlite powder.

5. A process for producing building gypsum powder according to claim 1, characterized in that: The ultrasonic pulverizer is an ultrasonic vibration pulverizer, and the particle size of the particles after pulverization is 0.0003-0.0002mm.

6. A building gypsum powder production equipment, characterized in that: The invention comprises a shell (1), characterized in that two fixed blocks (4) are fixedly connected to one side of the shell (1), a second slide groove (13) is provided on one side of the two fixed blocks (4), baffles (19) are slidably connected in the two second slide grooves (13), a convex block is fixedly connected to the bottom of the baffle (19), a circular hole is provided on the upper surface of the convex block, a cylinder (18) is fixedly connected in the circular hole, a pull rod (15) is slidably connected in the cylinder (18), the outer wall of the pull rod (15) is fixedly connected to a limit plate (16), and the limit plate ( A tension spring (17) is fixedly connected to one side of the shell (16), and one end of the tension spring (17) is fixed to a baffle (19); two insertion holes (5) are provided on one side of the shell (1), and the pull rod (15) can be inserted into the insertion holes (5); a screen (2) is fixedly connected to the shell (1), and the screen (2) is tiltedly arranged in the shell (1); a discharge port (14) is provided on one side of the shell (1), and the baffle (19) can block the discharge port (14); a material collecting component for collecting gypsum powder after screening is provided in the shell (1).

7. A building gypsum powder production equipment according to claim 6, characterized in that: The material collecting assembly comprises a first collecting box (7), the first collecting box (7) slides in the shell (1), both sides of the shell (1) are provided with first sliding grooves (12), and the first collecting box (7) slides in the first sliding grooves (12), the top of the shell (1) is fixedly connected to a funnel (3), and the bottom width of the funnel (3) matches the top width of the shell (1), one side of the shell (1) is fixedly connected to a vibration motor (9), and one side of the shell (1) is fixedly connected to a protective shell (8), and the vibration motor (9) is located in the protective shell (8).

8. A building gypsum powder production equipment according to claim 6, characterized in that: One side of the baffle (19) is fixedly connected to the second collection box (11), and one side of the baffle (19) and the second collection box (11) are both provided with an oblique angle, one side of the shell (1) is located above the first collection box (7) and is fixedly connected to the fixed end of the buckle (10), and one side of the first collection box (7) is fixedly connected to the movable end of the buckle (10).

Images