CN110342865B

CN110342865B - Device and method for preparing bonding mortar by utilizing solid waste saw mud

Info

Publication number: CN110342865B
Application number: CN201910643284.9A
Authority: CN
Inventors: 周毅
Original assignee: Qingdao Weitu Energy Saving Technology Co ltd
Current assignee: Qingdao Weitu Energy Saving Technology Co ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2021-11-23
Anticipated expiration: 2039-07-17
Also published as: CN110342865A

Abstract

The equipment for producing adhesive mortar by using solid waste saw sludge comprises a sludge tank, a linear vibrating screen, a sludge press and mortar production equipment. The mud pit is connected with a linear vibrating screen through a transmission pipeline, and the linear vibrating screen is connected with a mud press through a pipeline. The linear vibrating screen is connected with a gravel stacking area and a sand stacking area through pipelines. The mud press is connected with a mud stacking area through a pipeline. The sand piling zone is connected with the mortar production equipment through a pipeline. The bonding mortar prepared by the invention has high bonding strength, the highest breaking load of the bonding mortar reaches 2.08kN, the highest tensile strength reaches 1.30MPa (the national standard value is 0.60MPa), and the weather resistance is good; can efficiently treat the solid waste saw mud generated by stone factories and change waste into valuable.

Description

Device and method for preparing bonding mortar by utilizing solid waste saw mud

Technical Field

The invention belongs to the technical field of building materials, and relates to a method and equipment for preparing bonding mortar by using solid waste saw mud.

Background

In recent decades, the economic development of China is rapid, the urbanization level is continuously improved, various building projects such as the bamboo shoots in the spring after raining start, the demand for natural stone materials is rapidly increased, and the stone industry flourishes and develops all over the country. However, the problems of mountain destruction, waste treatment, environmental pollution and the like also plague the local government and stone processing and producing enterprises. For example, most stone processing enterprises in China do not fully utilize waste materials generated in the processing process, such as slurry, stone powder, corners and other waste materials generated in the working procedures of sawing, grinding and polishing and the like, many enterprises discharge and accumulate the waste materials, serious environmental pollution and ecological damage are caused, and some places even cause contradictions with the environmental management and control of the surrounding society. How to treat and utilize stone processing waste and change waste into valuable has become a great concern for stone processing enterprises.

Numerous stone processing plants generally face the problems of difficult solid waste saw mud treatment and high treatment cost. At present, a plurality of methods for utilizing stone waste, waste residue and stone powder in China are provided, and the main methods comprise: 1. the method is used for producing artificial sand, sand for casting, waterproof felt debonding powder and the like; 2. fillers and paint fillers of chemical products, building decoration whitewash and the like; 3. replacing soda for tanning, the stone powder replacing sodium bicarbonate can be leather acid, and replacing sodium bicarbonate can increase the ironing alkalinity; 4. When the welding electrode is manufactured, stone powder is added, so that a slagging effect can be achieved, and oxygen and nitrogen are prevented from entering a molten pool and an electric arc; 5. the waste stone slurry produced in stone processing can be used as cement raw material and asphalt pavement filler, etc. after precipitation, dehydration and drying. However, the method has high requirements on the separation process of the stone powder, has limited use amount, and also needs transportation and secondary processing, thereby increasing the treatment cost and generating secondary pollution and other problems.

In addition, the external thermal insulation of the building external wall is a new building energy-saving technology which is specified and popularized by the nation in recent years, and has the advantage that the internal thermal insulation is incomparable. At present, the method is widely popularized and applied in northern areas of China. The external thermal insulation of the external wall has more applicable systems, and the most common way at present is to add external glass fiber mesh cloth reinforced polymer mortar to polystyrene foam boards. The key point of success or failure of the method lies in the selection of the adhesive material between the polystyrene board and the wall surface and the polymer mortar finishing material with the requirements of crack resistance and water resistance for the surface of the polystyrene board. The polymer adhesive mortar is prepared by compounding high-quality modified special cement, various high polymer materials and fillers (quartz sand) through a unique process, has good water retention property, high adhesive strength, no slipping during construction, and excellent weather resistance, impact resistance and anti-cracking performance.

As a commonly used cement-based building material, the quality of the bonding strength and the weather resistance of the inorganic high-molecular polymer bonding mortar directly determine the quality of the bonding mortar. The quality of the bonding mortar sold on the market is uneven, and the main reason is related to the sand accounting for about 50 percent of the bonding mortar.

Disclosure of Invention

The invention provides a method and equipment for preparing bonding mortar by utilizing solid waste saw mud, aiming at the technical background, the invention can efficiently treat the solid waste saw mud generated by stone factories, and the prepared bonding mortar has high bonding strength and changes waste into valuable.

In order to achieve the purpose, the invention adopts the following technical scheme:

the equipment for producing adhesive mortar by using solid waste saw sludge comprises a sludge tank, a linear vibrating screen, a sludge press and mortar production equipment. The mud pit is connected with a linear vibrating screen through a transmission pipeline, and the linear vibrating screen is connected with a mud press through a pipeline.

The linear vibrating screen is connected with a gravel stacking area and a sand stacking area through pipelines. The gravel placement area is used to place <20 mesh gravel; the sand piling zone is used for piling 20-100 meshes of solid waste saw mud.

The mud press is connected with a mud stacking area through a pipeline, and the mud stacking area is used for stacking the mortar mud with the size of more than 100 meshes.

The sand stacking area is connected with mortar production equipment through a pipeline.

The invention also aims to provide a method for preparing bonding mortar by using the solid waste saw mud, which comprises the following specific steps:

in the first step, the saw mud is placed in a saw mud pool, and the saw mud in the saw mud pool is pumped to the linear vibrating screen.

Secondly, screening the mortar into the size smaller than 20 meshes, 20-100 meshes and larger than 100 meshes respectively through oscillating screening of a linear vibrating screen; the gravel with the size less than 20 meshes is automatically stacked in a gravel stacking area through a pipeline; the 20-100 mesh solid waste saw mud is automatically conveyed to a sand piling-up area through a pipeline; the mortar larger than 100 meshes is conveyed to a mud press through a pipeline.

And thirdly, making the mortar larger than 100 meshes into mortar mud by a mud press, and conveying the mortar mud to a mud stacking area through a pipeline.

Fourthly, conveying the 20-100-mesh solid waste saw mud to mortar production equipment, preparing a mixture containing 55-60 wt% of the 20-mesh-100-mesh solid waste saw mud, 38-43 wt% of cement, 1.0-1.5 wt% of rubber powder, 0.1-0.8 wt% of cellulose and 0-1.5 wt% of calcium formate, uniformly mixing, and preparing the prepared mixture into bonding mortar through the mortar production equipment.

Preferably, the solid waste saw mud is granite solid waste saw mud. Granite is a structural rock which is formed by the way that volcanic eruption lava rises to the surface layer of the crust under the molten state of considerable pressure, and rock pulp is not sprayed out of the ground but is slowly cooled and solidified under the ground, and has the advantages of compact structure, high hardness, strong corrosion resistance and the like. Therefore, in terms of performance, granite is an ideal raw material for bonding mortar sand, and can completely meet the requirements of mortar on bonding strength and weather resistance. The granite solid waste saw mud contains granite particles with different sizes and shapes, wherein most of the granite particles can be used as quartz sand for bonding mortar as an ideal aggregate.

Furthermore, the granite solid waste saw mud particles are polyhedral gravels with the size of 60-100 meshes, are full and high in hardness, and almost have no flaky or acicular particles, as shown in fig. 3. The grain size and shape of the gravel also directly determine the quality of the bonding mortar. The proper particle size and shape have a large impact on the bond strength and weatherability of the cementitious mortar. In the prior art, the sand with poor performance is mainly flaky or polyhedral with low surface number, and the sizes of the sand are different, as shown in a figure 2. When the volume is constant, the larger the surface area of the particles, the larger the contact area with the surrounding material, and the higher the adhesive strength. The bonding strength of the bonding mortar of the granite solid waste saw mud obtained by the experiment reaches about 2Mpa, which is 3-4 times of the national standard; the weather resistance completely meets the national standard requirements, and after the weather resistance is tested, the bonding strength is 2-3 times higher than the national standard.

Furthermore, the granite solid waste saw mud particles are manufactured by a special stone cutting process and a polishing process.

Furthermore, the cutting machine used in the opposite polishing process is an ultrathin intelligent stone cutting machine, the saw blade is thin, the impact is less, and the machine is stable.

The invention has the beneficial effects that:

1) the prepared bonding mortar has high bonding strength, the highest breaking load of the bonding mortar reaches 2.08kN, the highest tensile strength reaches 1.30MPa (national standard value of 0.60MPa), and the weather resistance is good.

2) Can efficiently treat the solid waste saw mud generated by stone factories and change waste into valuable.

Drawings

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

FIG. 2 is an enlarged view of an artificial sand particle;

FIG. 3 is an enlarged view of granite solid waste sawn mud particles of the present invention.

Reference numerals: 1-a mud pit, 2-a linear vibrating screen, 3-a mud press, 4-mortar production equipment, 5-a gravel stacking area, 6-a sand stacking area and 7-a mud stacking area.

Detailed Description

For the convenience of understanding, the technical scheme of the invention is further described in detail by embodiments with reference to the attached drawings:

an apparatus for preparing adhesive mortar from solid waste saw mud comprises a mud pit 1, a linear vibrating screen 2, a mud press 3 and a mortar production apparatus 4. The mud pit 1 is connected with the linear vibrating screen 2 through a transmission pipeline; the linear vibrating screen 2 is connected with a mud press 3 through a pipeline. The mud press 3 is connected with a mud piling zone 7 through a pipeline, and the mud piling zone 7 is used for piling the mortar mud with the granularity of more than 100 meshes.

The linear vibrating screen 2 is connected with a gravel piling zone 5 and a sand piling zone 6 through pipelines. The gravel placement area 5 is used to place <20 mesh gravel; the sand piling zone 6 is used for piling 20-100 meshes of solid waste saw mud.

The sand piling zone 6 is connected with the mortar production equipment 4 through a pipeline. The mortar production equipment 4 prepares the solid waste mud into bonding mortar, and the prepared bonding mortar can be used as leveling mortar for building walls, bonding mortar for decorative heat-insulating integrated plates and anti-crack plastering mortar for heat-insulating walls.

Based on the equipment, the invention provides a method for preparing bonding mortar by utilizing granite solid waste saw mud, which comprises the following specific steps:

firstly, granite solid waste saw mud mortar is placed in a saw mud pool 1, and then the granite solid waste saw mud mortar in the saw mud pool 1 is pumped to a linear vibrating screen 2.

Secondly, respectively screening granite solid waste mortar into particles smaller than 20 meshes, 20-100 meshes and larger than 100 meshes according to different sizes through oscillating screening of a linear vibrating screen 2; gravel with the size less than 20 meshes is automatically stacked in the gravel stacking area 5 through a pipeline; the 20-100 mesh solid waste saw mud is automatically conveyed to a sand piling-up area 6 through a pipeline; the mortar larger than 100 meshes is conveyed to the mud press 3 through a pipeline.

Thirdly, the mud press 3 makes the granite solid waste mortar larger than 100 meshes into mortar mud, and then the mortar mud is conveyed to a mud piling area 7 through a pipeline.

Fourthly, conveying the 20-100-mesh granite solid waste sawn mud to mortar production equipment 4 through a conveying pipeline, wherein the mortar production equipment 4 proportionally comprises the following components: 58 weight percent of 20-100 mesh granite solid waste and solid waste saw mud, 40 weight percent of cement, 1.2 weight percent of rubber powder, 0.4 weight percent of cellulose and 0.4 weight percent of calcium formate are uniformly mixed and prepared into bonding mortar through mortar production equipment 4.

The above embodiments are merely illustrative or explanatory of the technical solution of the present invention and should not be construed as limiting the technical solution of the present invention, and it is apparent that various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present invention. The present invention also encompasses these modifications and variations provided they come within the scope of the claims and their equivalents.

Claims

1. The method for manufacturing the bonding mortar by using the equipment for manufacturing the bonding mortar by using the solid waste saw mud comprises the following specific steps:

firstly, placing saw mud in a mud pool, and pumping the saw mud in the mud pool to a linear vibrating screen;

secondly, screening the mortar into the size smaller than 20 meshes, the size of 20 meshes-100 meshes and the size larger than 100 meshes respectively through oscillating screening of a linear vibrating screen; the gravel with the size less than 20 meshes is automatically stacked in a gravel stacking area through a pipeline; the 20-100-mesh solid waste saw mud is automatically conveyed to a sand stacking area through a pipeline; conveying the mortar larger than 100 meshes to a mud press through a pipeline;

thirdly, making the mortar larger than 100 meshes into mortar mud by a mud press, and conveying the mortar mud to a mud stacking area through a pipeline;

fourthly, conveying the 20-100-mesh solid waste saw mud to mortar production equipment, uniformly mixing 55-60 wt% of the 20-mesh-100-mesh solid waste saw mud, 38-43 wt% of cement, 1.0-1.5 wt% of rubber powder, 0.1-0.8 wt% of cellulose and 0-1.5 wt% of formic acid, and preparing bonding mortar through the mortar production equipment;

the solid waste saw mud is granite solid waste saw mud;

the granite solid waste sawing mud particles are polyhedral gravels with the size of 60-100 meshes;

the equipment for manufacturing the bonding mortar by utilizing the solid waste saw mud comprises a mud pit, a linear vibrating screen, a mud press and mortar production equipment, wherein the mud pit is connected with the linear vibrating screen through a transmission pipeline, the linear vibrating screen is connected with the mud press through a pipeline, the linear vibrating screen is connected with a gravel stacking area and a sand stacking area through pipelines, the mud press is connected with the mud stacking area through a pipeline, and the sand stacking area is connected with the mortar production equipment through a pipeline.