Microwave activation of mud cakes made from granite residual soils

Abstract

The present application relates to the technical field of curing agent, and discloses a microwave activation method of mud cake prepared from granite residual soil, comprising the following steps: 1) placing the granite residual soil in a stirring cylinder, wherein a water body is arranged in the stirring cylinder, and a dispersing agent is added into the stirring cylinder; after the granite residual soil is soaked in the water body for a set time, the granite residual soil, the water body and the dispersing agent are mixed to form a bubble-dispersion slurry; 2) adding a flocculating agent into the stirring cylinder, and mixing and reacting the flocculating agent with the bubble-dispersion slurry, so that the bubble-dispersion slurry forms a flocculating mud slurry and fine sand; 3) performing pressure filtration concentration on the flocculating mud slurry to form a block-shaped mud cake; and 4) placing the mud cake in a microwave generating device to perform heating activation, and controlling the surface temperature of the mud cake to be between 290 DEG C and 310 DEG C; after the mud cake is heated and activated in the microwave generating device for a set time, the mud cake is taken out from the microwave generating device and cooled.

Description

TECHNICAL FIELD

[0001] The application relates to a microwave activation method of mud cake prepared from granite residual soil. BACKGROUND

[0002] The granite residual soil is a detritus of granite remaining in situ after physical weathering and chemical weathering, and the main components of the granite are quartz, feldspar, mica and hornblende, which have a holocrystalline and equigranular structure, hard texture, uniform properties and high compressive strength of rock mass.

[0003] In the prior art, the granite residual soil with high weathering degree has low strength and shear strength, high water absorption and expansion, and is difficult to be regenerated and utilized, and is generally treated by centralized storage, but the centralized storage causes a large amount of land occupation of solid waste resources and has certain safety hidden troubles. SUMMARY

[0004] The application aims to provide a microwave activation method of mud cake prepared from granite residual soil, and aims to solve the problem that the granite residual soil is difficult to be treated in the prior art.

[0005] The application is implemented as follows: the microwave activation method of mud cake prepared from granite residual soil comprises the following steps:

[0006] 1) The granite residual soil is placed in a stirring cylinder, the stirring cylinder has a water body, a dispersing agent is added into the stirring cylinder, the granite residual soil is soaked in the water body for a set time, and then the granite residual soil, the water body and the dispersing agent are mixed to form a bubble-dispersed slurry in a bubble-dispersed state;

[0007] 2) A flocculating agent is added into the stirring cylinder, the flocculating agent is mixed with the bubble-dispersed slurry to react, and then the bubble-dispersed slurry forms flocculating mud slurry and fine sand;

[0008] 3) The flocculating mud slurry is concentrated by pressure filtration to form a block-shaped mud cake;

[0009] 4) The mud cake is placed in a microwave generating device for heating and activation, the surface temperature of the mud cake is controlled to be between 290 DEG C and 310 DEG C, and when the mud cake is heated and activated in the microwave generating device for a set time, the mud cake is taken out from the microwave generating device and cooled.

[0010] Optionally, the microwave generating device has an activation cavity, the activation cavity has a placing rack, the placing rack is provided with a plurality of placing discs, the plurality of placing discs are arranged in an upper and lower interval state, and the adjacent placing discs have an activation interval.

[0011] The top of the placement disc is concave downward to form a circular groove with an open top, and the top of the placement disc is formed with an abutting annular surface formed on the outer periphery of the circular groove;

[0012] In the step 4), the mud cake is placed on the top of the placement disc, and the outer periphery of the mud cake abuts on the abutting annular surface from top to bottom, and the middle part of the mud cake is in a suspended state.

[0013] Optionally, the middle part of the circular groove is provided with a central shaft, and the top of the central shaft is arranged flush with the abutting annular surface; in the step 4), when the outer periphery of the mud cake abuts on the abutting annular surface, the central position of the mud cake abuts on the central shaft from top to bottom.

[0014] Optionally, the top of the central shaft is formed with a ball, and the top of the ball is arranged flush with the abutting annular surface; the ball is hollow, and has a hollow cavity in the inside, a top hole in the top, and an outer peripheral hole in the outer periphery, and the top hole and the outer peripheral hole are respectively communicated with the hollow cavity.

[0015] In the step 4), when the outer periphery of the mud cake abuts on the abutting annular surface, the top of the ball abuts on the central position of the mud cake from bottom to top, the mud cake covers the top hole, and the outer peripheral hole is in an exposed state.

[0016] Optionally, a plurality of longitudinally arranged springs are arranged in the circular groove, the bottom of the spring is fixed to the bottom of the circular groove, and the top of the spring is arranged freely; a longitudinally arranged moving shaft is inserted in the spring, the bottom of the moving shaft penetrates into the spring, and the bottom of the moving shaft has an elastic interval with the bottom of the circular groove, the top of the moving shaft is exposed above the spring, and is arranged higher than the abutting annular surface.

[0017] In the step 4), when the outer periphery of the mud cake abuts on the abutting annular surface, the mud cake abuts on the top of the moving shaft from top to bottom, the spring is compressed, and the top of the moving shaft is arranged flush with the abutting annular surface; after the mud cake is heated in the activation cavity for a set time, the moisture in the mud cake evaporates, the weight of the mud cake decreases, the spring recovers deformation upward, the moving shaft moves upward, and the mud cake is lifted up, and the outer periphery of the mud cake is separated from the abutting annular surface.

[0018] Optionally, in the step 1), the dispersing agent is bentonite and cellulose; and in the step 2), the flocculating agent is polyacrylamide.

[0019] Optionally, in the step 4), after the mud cake is heated and activated in the microwave generating device for a set time, the mud cake is taken out from the microwave generating device for air cooling.

[0020] Optionally, in the step 1), the granite residual soil is the debris left after the physical weathering and chemical weathering of granite, and the content of kaolinite in the granite residual soil is greater than 50%.

[0021] Optionally, in the step 4), the mud cake taken out from the microwave generating device is placed in a wind cooling box for standing cooling; the wind cooling box has a wind cooling cavity in the inside, and the middle part of the wind cooling cavity has a horizontally arranged wind cooling pipe which is arranged in a multi-section meandering shape, and the two ends of the wind cooling pipe respectively extend to the outside of the wind cooling cavity and are connected with a cold air machine.

[0022] The wind cooling pipe divides the wind cooling cavity into an upper cavity and a lower cavity, the upper cavity is located above the wind cooling pipe, and the lower cavity is located below the wind cooling pipe; the top of the wind cooling pipe is provided with a plurality of air blowing holes which are arranged at intervals along the length direction of the wind cooling pipe; the top of the wind cooling pipe is provided with a plurality of raised positions which are arranged at intervals along the length direction of the wind cooling pipe and are located between adjacent air blowing holes.

[0023] The bottom of the lower cavity is closed, and the top of the upper cavity is provided with a plurality of air permeable holes; in the step 4), the mud cake is placed on the wind cooling pipe, the mud cake abuts on the raised positions from top to bottom, the air blowing holes are located below the mud cake and have an air blowing interval with the bottom of the mud cake; the cold air machine blows cold air into the wind cooling pipe, the cold air is blown out upward through the air blowing holes to cool the mud cake, and the gas in the upper cavity is blown to the outside of the wind cooling cavity through the air permeable holes, and the upper cavity and the lower cavity form an up-down circulating air flow.

[0024] Optionally, the raised positions are provided with a plurality of round ball bodies arranged in rolling manner, and the bottom of the mud cake abuts on the round ball bodies.

[0025] Compared with the prior art, the microwave activation method of the mud cake prepared from the granite residual soil provided by the application solves the problem of large occupation of land by solid waste resources and eliminates the large safety hazards caused by stacking, by adding a dispersing agent into a stirring cylinder, allowing the granite residual soil in the stirring cylinder to be dispersed in water, then adding a flocculating agent to make the fine sand flocculate and wash out, then concentrating the flocculating mud slurry of the washed fine sand to form a mud cake, and then using a microwave generating device to heat and activate the mud cake, so that the mud cake has high hydration activity and can be used as one of the raw materials for making a solidifying agent and applied to silt treatment engineering. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of the microwave device provided by the application;

[0027] Figure 2 is a partial schematic view of the circular groove provided by the application.

[0028] Figure 3 It is a structural schematic diagram of the air cooling box provided by the present invention;

[0029] Figure 4 1 is a schematic top view of the cold air duct provided by the present invention;

[0030] Figure 5 It is a partial schematic diagram of the raised position provided by the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0033] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] Reference Figures 1-4 The figure shows a preferred embodiment of the present invention.

[0035] The microwave activation method of the mud cake prepared from granite residual soil provided by the present invention comprises the following steps:

[0036] 1) Place the granite residual soil in a mixing drum with water, add a dispersant to the mixing drum, and soak the granite residual soil in the water for a set time. The granite residual soil, water and dispersant are mixed to form a foamy slurry;

[0037] 2) Add flocculant into the mixing drum, and after the flocculant and the foam slurry react, the foam slurry forms flocculated mud and fine sand;

[0038] 3) The flocculated slurry is filtered and concentrated to form a bulk mud cake;

[0039] 4) Put the mud cake in the microwave generating device for heating activation, control the surface temperature of the mud cake to be between 290-310℃; when the mud cake is heated and activated in the microwave generating device to the set time, take out the mud cake from the microwave generating device and cool it.

[0040] The microwave activation method of the mud cake prepared from the granite residual soil provided above, by adding a dispersing agent into the stirring cylinder, the granite residual soil in the stirring cylinder is dispersed in water, then the fine sand is flocculated and washed out by adding a flocculating agent, then the flocculated mud slurry of the washed fine sand is concentrated to form a mud cake, then the mud cake is heated and activated by using a microwave generating device, so that it has high hydration activity, and then it is mixed with cement, steel slag powder, gypsum powder, slag powder and activator according to a set proportion to form a solidifying agent, so that it can be used as one of the raw materials for making the solidifying agent, and is applied to silt treatment engineering and the like, solves the problem of large occupation of land by solid waste resources, and eliminates the large safety hazards caused by stacking.

[0041] The microwave generating device has an activation cavity 100, the activation cavity 100 has a placing rack 110, the placing rack 110 is provided with a plurality of placing discs 200, the plurality of placing discs 200 are arranged in an up-down interval shape, and the adjacent placing discs 200 have an activation interval therebetween;

[0042] The top of the placing disc 200 is recessed downward to form a circular groove 201 with an open top, and the top of the placing disc 200 forms an abutting annular surface, which is formed on the outer periphery of the circular groove 201;

[0043] In step 4), the mud cake is placed on the top of the placing disc 200, the outer periphery of the mud cake abuts on the abutting annular surface from top to bottom, and the middle part of the mud cake is in a suspended state. In this way, a plurality of mud cakes can be activated by the design of the plurality of placing discs 200, and the leaked water in the heating and activation process can be collected by the circular groove 201.

[0044] Specifically, the middle part of the circular groove 201 is provided with a central shaft 210, the top of the central shaft 210 is arranged flush with the abutting annular surface, and in step 4), when the outer periphery of the mud cake abuts on the abutting annular surface, the central position of the mud cake abuts on the central shaft 210 from top to bottom, and the leaked water in the heating and activation process can be collected by the circular groove 201.

[0045] The top of the central shaft 210 is formed with a ball 211, the top of the ball 211 is arranged flush with the abutting annular surface; the ball 211 is in a hollow shape, the inside of the ball 211 has a hollow cavity, the top of the ball 211 has a top hole 2110, and the outer periphery of the ball 211 has an outer periphery hole 2111, and the top hole 2110 and the outer periphery hole 2111 respectively communicate with the hollow cavity;

[0046] In step 4), when the outer periphery of the mud cake abuts on the abutment ring surface, the top of the ball 211 abuts on the central position of the mud cake from bottom to top, the mud cake covers on the top hole 2110, and the outer periphery hole 2111 is in a exposed state. In this way, the water body can be stored into the hollow cavity through the top hole 2110 and the outer periphery hole 2111.

[0047] The circular groove 201 is provided with a plurality of longitudinally arranged springs 220, the bottom of the spring 220 is fixed on the bottom of the circular groove 201, and the top of the spring 220 is arranged freely; a longitudinally arranged moving shaft 230 is inserted in the spring 220, the bottom of the moving shaft 230 penetrates into the spring 220, and the bottom of the moving shaft 230 has an elastic interval with the bottom of the circular groove 201, the top of the moving shaft 230 is exposed above the spring 220 and is arranged higher than the abutment ring surface;

[0048] In step 4), when the outer periphery of the mud cake abuts on the abutment ring surface, the mud cake abuts on the top of the moving shaft 230 from top to bottom, the spring 220 is compressed, and the top of the moving shaft 230 is arranged flush with the abutment ring surface; after the mud cake is heated in the activation cavity 100 for a set time, the water in the mud cake evaporates, the weight of the mud cake decreases, the spring 220 recovers deformation upwards, the moving shaft 230 moves upwards, and the mud cake is lifted, and the outer periphery of the mud cake is separated from the abutment ring surface. In this way, when a large amount of water in the mud cake is lost, it is lifted by the moving shaft 230, greatly increasing the exposed area of the bottom of the mud cake and enhancing the heating activation effect, which is helpful to uniform heating activation.

[0049] Specifically, in step 1), the dispersing agent is bentonite and cellulose; in step 2), the flocculating agent is polyacrylamide.

[0050] Specifically, in step 4), after the mud cake is heated and activated in the microwave generating device for a set time, the mud cake is taken out from the microwave generating device for air cooling.

[0051] Specifically, in step 1), the granite residual soil is the detritus remaining after the physical weathering and chemical weathering of granite, and the content of kaolinite in the granite residual soil is greater than 50%.

[0052] In this embodiment, in step 4), the mud cake taken out from the microwave generating device is placed in the air cooling box 300 for standing cooling; the inside of the air cooling box 300 has an air cooling cavity, the middle part of the air cooling cavity has a horizontally arranged air cooling pipe 310, the air cooling pipe 310 is arranged in a multi-section meandering curved manner, and the two ends of the air cooling pipe 310 respectively extend to the outside of the air cooling cavity and are connected with air coolers;

[0053] The air-cooling pipe 310 divides the air-cooling cavity into an upper cavity 302 and a lower cavity 301. The upper cavity 302 is above the air-cooling pipe 310, and the lower cavity 301 is below the air-cooling pipe 310. The top of the air-cooling pipe 310 is provided with a plurality of air blowing holes 311, which are arranged along the length direction of the air-cooling pipe 310. The top of the air-cooling pipe 310 is provided with a plurality of convex positions 312, which are arranged along the length direction of the air-cooling pipe 310 and are located between adjacent air blowing holes 311.

[0054] The bottom of the lower cavity 301 is closed, and the top of the upper cavity 302 is provided with a plurality of air permeable holes. In step 4), the mud cake is placed on the air-cooling pipe 310, and the mud cake abuts on the convex positions 312 from top to bottom. The air blowing holes 311 are below the mud cake and have an air blowing interval with the bottom of the mud cake. The air-cooling pipe 310 blows cold air, and the cold air blows upward through the air blowing holes 311 to cool the mud cake. The gas in the upper cavity 302 blows to the outside of the air-cooling cavity through the air permeable holes, and the air flow is formed between the upper cavity 302 and the lower cavity 301. In this way, the activated mud cake can be quickly cooled.

[0055] The convex positions 312 are provided with a plurality of ball bodies 313 arranged in rolling manner, and the bottom of the mud cake abuts on the ball bodies 313. In this way, the mud cake can abut on the ball bodies 313 and move in rolling manner, which is convenient for placing the mud cake on the air-cooling pipe 310 and moving the position, and is convenient for taking and placing the mud cake.

[0056] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for microwave activation of mud cake prepared from granite residual soil, characterized in that, It comprises the following steps: 1) Put the granite residual soil in the stirring barrel, which has a water body, add a dispersing agent to the stirring barrel, soak the granite residual soil in the water body for a certain time, and then mix the granite residual soil, water body and dispersing agent to form a bubble dispersion slurry; 2) Add a flocculating agent to the stirring barrel, mix the flocculating agent with the bubble dispersion slurry, and then the bubble dispersion slurry forms a flocculating mud slurry and fine sand; 3) Concentrate the flocculating mud slurry by pressure filtration to form a block-shaped mud cake; 4) Put the mud cake in a microwave generating device for heating and activation, control the surface temperature of the mud cake to be between 290-310℃, and take out the mud cake from the microwave generating device after heating and activation for a certain time.

2. The method for microwave activation of the mud cake prepared from the granite residual soil according to claim 1, characterized in that, The microwave generating device has an activation cavity, the activation cavity has a placing rack, the placing rack is provided with a plurality of placing discs, the placing discs are arranged in an upper and lower interval, and the adjacent placing discs have an activation interval; The top of the placing disc is concave downward to form a circular groove with an open top, and the top of the placing disc forms an abutting ring surface, which is formed on the outer periphery of the circular groove; In step 4), the mud cake is placed on the top of the placing disc, the outer periphery of the mud cake abuts on the abutting ring surface from top to bottom, and the middle part of the mud cake is suspended.

3. The method for microwave activation of the mud cake prepared from the granite residual soil according to claim 2, characterized in that, The middle part of the circular groove is provided with a central shaft, the top of the central shaft is arranged flush with the abutting ring surface, and when the outer periphery of the mud cake abuts on the abutting ring surface in step 4), the central position of the mud cake abuts on the central shaft from top to bottom.

4. The method for microwave activation of the mud cake prepared from the granite residual soil according to claim 3, characterized in that, The top of the central shaft is provided with a ball, the top of the ball is arranged flush with the abutting ring surface; the ball is hollow, the inside of the ball has a hollow cavity, the top of the ball has a top hole, and the outer periphery of the ball has an outer periphery hole, and the top hole and the outer periphery hole respectively communicate with the hollow cavity; In step 4), when the outer periphery of the mud cake abuts on the abutting ring surface, the top of the ball abuts on the central position of the mud cake from bottom to top, the mud cake covers the top hole, and the outer periphery hole is in a exposed state.

5. The method for microwave activation of the mud cake prepared from the granite residual soil according to claim 4, characterized in that, A plurality of longitudinally arranged springs are arranged in the circular groove, the bottom of the spring is fixed in the bottom of the circular groove, and the top of the spring is arranged freely; a longitudinally arranged moving shaft is inserted in the spring, the bottom of the moving shaft penetrates into the spring, the bottom of the moving shaft and the bottom of the circular groove have an elastic interval, the top of the moving shaft is exposed above the spring and is arranged higher than the abutting ring surface; In step 4), when the outer periphery of the mud cake abuts on the abutting ring surface, the mud cake abuts on the top of the moving shaft from top to bottom, the spring is compressed, and the top of the moving shaft is arranged flush with the abutting ring surface; after the mud cake is heated and activated in the activation cavity for a certain time, the water in the mud cake evaporates, the weight of the mud cake decreases, the spring recovers deformation upward, the moving shaft moves upward and lifts the mud cake, and the outer periphery of the mud cake is separated from the abutting ring surface.

6. The method for the microwave activation of the mud cake prepared from the granite residual soil according to claim 1, characterized in that, The dispersant is bentonite and cellulose in the step 1); the flocculant is polyacrylamide in the step 2).

7. The method for the microwave activation of the mud cake prepared from the granite residual soil according to claim 1, characterized in that, In the step 4), the mud cake is taken out from the microwave generating device and cooled by air blowing after being heated and activated in the microwave generating device for a set time.

8. The method for the microwave activation of the mud cake prepared from the granite residual soil according to claim 1, characterized in that, In the step 1), the granite residual soil is the debris left after physical weathering and chemical weathering of granite, and the content of kaolinite in the granite residual soil is greater than 50%.

9. The method for microwave activation of pellets prepared from granite residual soil according to any one of claims 1 to 8, characterized in that, In the step 4), the mud cake taken out from the microwave generating device is placed in a wind cooling box for standing cooling; the wind cooling box has a wind cooling cavity in the inside, and a horizontally arranged wind cooling pipe in the middle of the wind cooling cavity, the wind cooling pipe is arranged in a multi-segment meandering shape, and the two ends of the wind cooling pipe respectively extend to the outside of the wind cooling cavity and are connected with a cold air blower; The wind cooling pipe divides the wind cooling cavity into an upper cavity and a lower cavity, the upper cavity is located above the wind cooling pipe, and the lower cavity is located below the wind cooling pipe; the top of the wind cooling pipe is provided with a plurality of air blowing holes, and the air blowing holes are arranged at intervals along the length direction of the wind cooling pipe; the top of the wind cooling pipe is provided with a plurality of convex positions, and the convex positions are arranged at intervals along the length direction of the wind cooling pipe and located between adjacent air blowing holes; The bottom of the lower cavity is closed, and the top of the upper cavity is provided with a plurality of air permeable holes; in the step 4), the mud cake is placed on the wind cooling pipe, the mud cake abuts on the convex positions from top to bottom, the air blowing holes are located below the mud cake and have an air blowing interval with the bottom of the mud cake; the cold air blower blows cold air into the wind cooling pipe, the cold air blows out upward through the air blowing holes to cool the mud cake, and the gas in the upper cavity blows out to the outside of the wind cooling cavity through the air permeable holes, forming an up-down circulating air flow between the upper cavity and the lower cavity.

10. The method for microwave activation of the mud cake prepared from the granite residual soil according to claim 9, characterized in that, The convex positions are provided with a plurality of ball bodies arranged in rolling manner, and the bottom of the mud cake abuts on the ball bodies.

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