阅读说明：本技术 一种高分子节能环保高强度树脂砖及其制备方法 (High-molecular energy-saving environment-friendly high-strength resin brick and preparation method thereof ) 是由 张哲� 于 2020-11-26 设计创作，主要内容包括：本发明公开了一种高分子节能环保高强度树脂砖及其制备方法,涉及危险废物综合利用技术领域,树脂砖由如下重量份数的原料制备而成：废环氧树脂粉350-400份、水泥160-200份、建筑垃圾400-525份、水150-200份。本发明的树脂砖利用废环氧树脂粉与水泥掺混制作混凝土砌块,用作建筑材料,抗压强度指标达到混凝土实心砖(GBT 21144-2007)强度等级MU20.0标准,对应最大吸水率为、软化系数、抗冻性等指标均符合建筑用砖要求。本发明的树脂砖在浸出毒性实验中能够满足《危险废物鉴别标准浸出毒性鉴别》(GB5085.3-2007)标准限值要求,符合环保要求。(The invention discloses a high-molecular energy-saving environment-friendly high-strength resin brick and a preparation method thereof, relating to the technical field of comprehensive utilization of hazardous wastes, wherein the resin brick is prepared from the following raw materials in parts by weight: 400 portions of waste epoxy resin powder 350-containing materials, 200 portions of cement 160-containing materials, 525 portions of construction waste and 200 portions of water 150-containing materials. The resin brick of the invention is used for preparing the concrete block by mixing the waste epoxy resin powder and the cement, the concrete block is used as a building material, the compressive strength index reaches the MU20.0 standard of the strength grade of a concrete solid brick (GBT 21144-. The resin brick can meet the limit value requirement of the standard of hazardous waste identification Standard Leaching toxicity identification (GB5085.3-2007) in a leaching toxicity experiment, and meets the requirement of environmental protection.)

1. The high-molecular energy-saving environment-friendly high-strength resin brick is characterized by being prepared from the following raw materials in parts by weight: 400 portions of waste epoxy resin powder 350-containing materials, 200 portions of cement 160-containing materials, 525 portions of construction waste and 200 portions of water 150-containing materials.

2. The resin brick as claimed in claim 1, wherein the resin brick is prepared from the following raw materials in parts by weight: 370 parts of waste epoxy resin powder, 185 parts of cement, 445 parts of construction waste and 165 parts of water.

3. The resin brick as claimed in claim 1, wherein the construction waste is sand and stone.

4. A method for manufacturing a resin block according to any one of claims 1 to 3, wherein the method comprises the steps of:

conveying cement into a factory by adopting a tank truck, then conveying the cement into a cement silo for temporary storage through a closed pipeline by pneumatic conveying, then conveying the cement into a proportioning bin by a screw conveyor, and then conveying the cement into a mixing and stirring tank after metering from the proportioning bin;

conveying bagged waste epoxy resin powder in a storage warehouse into a raw material silo for temporary storage through a closed pipeline by negative pressure pneumatic conveying, then conveying the powder into a proportioning bin by a screw conveyor, and feeding the powder into a mixing and stirring tank after metering from the proportioning bin;

building garbage is poured into the hopper by manpower or a forklift and is sent into the mixing and stirring tank by a screw conveyer;

after cement, waste epoxy resin powder, construction waste and water enter a mixing and stirring tank, starting a stirrer, and uniformly mixing and stirring;

the stirred raw materials enter a forming machine for compression forming;

and (5) carrying out normal-temperature watering maintenance on the molded brick in a workshop.

5. The method for preparing the resin brick as claimed in claim 4, wherein the tank car is connected with the cement silo by a closed pipeline in the feeding process of the cement, a first pulse bag type dust collector is arranged above the cement silo, and the cement in the cement silo generates particles when falling into the proportioning bin through a screw conveyer, is collected by the gas collecting hood and is treated by the first pulse bag type dust collector; the pipeline of the screw conveyer is closed, and no particulate matter is generated in the cement conveying process.

6. The method for preparing the resin brick as claimed in claim 4, wherein the epoxy resin powder is fed into the raw material silo by negative pressure pneumatic conveying during the feeding process, the conveying pipeline is closed, a second pulse bag type dust collector is arranged above the raw material silo, the epoxy resin powder in the raw material silo is sucked by negative pressure when falling into the proportioning bin by the screw conveyor and then treated by the second pulse bag type dust collector, and the pipeline of the screw conveyor is closed, so that no particulate matter is generated during the conveying process of the epoxy resin powder.

7. The method for producing a resin brick according to claim 4 wherein the curing time is 1 to 3 days.

Technical Field

The invention relates to the technical field of comprehensive utilization of hazardous wastes, in particular to a high-molecular energy-saving environment-friendly high-strength resin brick and a preparation method thereof.

Background

According to a dangerous waste exemption management list in the appendix of national hazardous waste entry (2016), waste resin powder generated after metals in a waste copper-clad plate, a printed circuit board and a circuit board are recycled by crushing and sorting can be transported without being transported according to dangerous waste when a transportation tool meets the requirements of rain resistance, leakage resistance and omission resistance; when the garbage enters a household garbage landfill for landfill disposal, the disposal process is not managed according to dangerous wastes. However, the waste epoxy resin powder has the characteristics of looseness, difficulty in compaction and the like, the landfill difficulty is high, the generation amount of household garbage is increased year by year along with the development of social and economic levels, and the household garbage landfill sites in the Henan province and the peripheral areas are close to full-load operation and have high landfill pressure, so the household garbage landfill generally does not receive the waste epoxy resin powder. Meanwhile, domestic and foreign waste epoxy resin powder is not treated by adopting an incineration mode because the mode has high cost and serious secondary pollution. Therefore, the existing disposal mode of the waste epoxy resin powder is basically comprehensive utilization.

According to investigation, at present, no comprehensive utilization enterprises of waste epoxy resin powder exist in Henan province, and a plurality of circuit board production enterprises and waste circuit board sorting enterprises exist in Henan province, so that the produced waste epoxy resin powder is transported to other places for disposal, the cost is high, and the transportation risk is increased.

Disclosure of Invention

Therefore, the invention provides a high-molecular energy-saving environment-friendly high-strength resin brick and a preparation method thereof, and aims to solve the problems that waste epoxy resin powder produced by a plurality of circuit board production enterprises and waste circuit board sorting enterprises in Henan province is transported to other places to be treated, so that the treatment cost is high, and the transportation risk is increased.

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

according to the first aspect of the invention, the high-molecular energy-saving environment-friendly high-strength resin brick is prepared from the following raw materials in parts by weight: 400 portions of waste epoxy resin powder 350-containing materials, 200 portions of cement 160-containing materials, 525 portions of construction waste and 200 portions of water 150-containing materials.

Further, the resin brick is prepared from the following raw materials in parts by weight: 370 parts of waste epoxy resin powder, 185 parts of cement, 445 parts of construction waste and 165 parts of water.

Further, the construction waste is sand and stone.

According to a second aspect of the present invention, the above method for manufacturing a resin brick comprises the steps of:

conveying cement into a factory by adopting a tank truck, then conveying the cement into a cement silo for temporary storage through a closed pipeline by pneumatic conveying, then conveying the cement into a proportioning bin by a screw conveyor, and then conveying the cement into a mixing and stirring tank after metering from the proportioning bin;

conveying bagged waste epoxy resin powder in a storage warehouse into a raw material silo for temporary storage through a closed pipeline by negative pressure pneumatic conveying, then conveying the powder into a proportioning bin by a screw conveyor, and feeding the powder into a mixing and stirring tank after metering from the proportioning bin;

building garbage is poured into the hopper by manpower or a forklift and is sent into the mixing and stirring tank by a screw conveyer;

after cement, waste epoxy resin powder, construction waste and water enter a mixing and stirring tank, starting a stirrer, and uniformly mixing and stirring;

the stirred raw materials enter a forming machine for compression forming;

and (5) carrying out normal-temperature watering maintenance on the molded brick in a workshop.

Furthermore, in the cement feeding process, the tank truck is connected with a cement silo by adopting a closed pipeline, a first pulse bag type dust collector is arranged above the cement silo, and particulate matters are generated when the cement in the cement silo falls into the proportioning bin through a screw conveyor and are collected by a gas collecting hood and then treated by the first pulse bag type dust collector; the pipeline of the screw conveyer is closed, and no particulate matter is generated in the cement conveying process.

Furthermore, in the feeding process of the epoxy resin powder, the bagged epoxy resin powder enters the raw material silo in a negative pressure pneumatic conveying mode, the conveying pipeline is closed, a second pulse bag type dust collector is arranged above the raw material silo, the epoxy resin powder in the raw material silo falls into the proportioning bin through a screw conveyor, is sucked under negative pressure and then is treated by the second pulse bag type dust collector, the pipeline of the screw conveyor is closed, and no particulate matter is generated in the conveying process of the epoxy resin powder.

Further, the curing time is 1-3 days.

The invention has the following advantages:

the high-molecular energy-saving environment-friendly high-strength resin brick disclosed by the invention is used for preparing a concrete block by mixing waste epoxy resin powder and cement, the concrete block is used as a building material, the compressive strength index reaches the MU20.0 standard of the strength grade of a concrete solid brick (GBT 21144-2007), and the indexes such as the corresponding maximum water absorption, the softening coefficient, the freezing resistance and the like all meet the requirements of the building brick. The resin brick can meet the limit value requirement of the standard of hazardous waste identification Standard Leaching toxicity identification (GB5085.3-2007) in a leaching toxicity experiment, meets the requirement of environmental protection, and can effectively achieve the purpose of comprehensive utilization of hazardous articles of waste epoxy resin powder.

In the preparation method of the high-molecular energy-saving environment-friendly high-strength resin brick, raw materials are local raw materials in Henan province, so that the problems of high cost and increased transportation risk caused by transporting waste epoxy resin powder to other places for disposal or utilization are solved, and the cement raw materials are cheap and easy to obtain, so that the preparation cost of the resin brick is low, and the preparation method is suitable for wide production; the process and equipment adopted in the preparation method of the resin brick are simple, the equipment and the operation cost are low, the preparation cost can be further reduced, and the comprehensive utilization of the cost of the waste epoxy resin foundation is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.

Fig. 1 is a flow chart of a process for preparing a polymer energy-saving environment-friendly high-strength resin brick provided by embodiment 1 of the invention.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The waste epoxy resin powder used in the following examples is obtained by subjecting waste circuit boards received by waste circuit board sorting enterprises in the provinces of Henan to crushing, magnetic separation, air flow sorting and electrostatic sorting, and then separating metals such as copper and the like in the waste circuit boards from resin non-metals.

Example 1

A high-molecular energy-saving environment-friendly high-strength resin brick is prepared from the following raw materials in parts by weight: 370 parts of waste epoxy resin powder, 185 parts of cement, 445 parts of construction waste and 165 parts of water. The construction waste is sand and stone.

The preparation method of the resin brick comprises the following steps, and the preparation process flow chart is shown in figure 1:

(1) cement feed

Is provided with a seat of 25m³The cement silo is conveyed into a factory by a tank truck, then enters the cement silo for temporary storage through a closed pipeline through pneumatic conveying, is conveyed into a proportioning bin through a screw conveyor, and enters a stirrer after being metered from the proportioning bin.

The tank car is connected with the cement silo by adopting a closed pipeline, no particulate matters are generated in the conveying process, but dust can be generated due to the fall when the dust enters the cement silo, and a first pulse bag type dust collector is arranged above the cement silo. When cement in the cement silo falls into the proportioning bin through the screw conveyor, particulate matters are generated, and are collected by the gas collecting hood and then treated by the first pulse bag type dust collector. The pipeline of the screw conveyer is closed, and no particulate matters are generated in the cement conveying process. The first pulse bag type dust collector is hermetically connected with a breather valve at the top of the cement silo, all particles discharged by the breather valve enter the first pulse bag type dust collector, are collected by the first pulse bag type dust collector and then pass through the first pulse bag type dust collectorThe fan introduces a 15m exhaust funnel for discharge. The dust removal efficiency of the first pulse bag type dust collector is 99.9 percent, and the air volume of the fan is 5000m³Per hour, annual run time 7200 h.

(2) Waste epoxy resin powder feed

The purchased waste epoxy resin powder is bagged by double-layer waterproof and moistureproof snakeskin bags, and dust is not generated when the materials are unloaded from a storage warehouse. The bagged waste epoxy resin powder in the storage warehouse enters a waste epoxy resin powder silo for temporary storage through a closed pipeline through negative pressure pneumatic transmission, then is sent into a proportioning bin through a screw conveyor, and enters a stirrer after being metered from the proportioning bin.

The bagged epoxy resin powder enters the raw material silo in a negative pressure pneumatic conveying mode, a conveying pipeline is closed, no particulate matter is generated in the conveying process, dust can be generated due to the fall when the bagged epoxy resin powder enters the raw material silo, and a second pulse bag type dust collector is arranged above the raw material silo. The epoxy resin powder in the raw material silo generates particles when falling into the proportioning bin through the screw conveyer, and is treated by the second pulse bag type dust collector after negative pressure suction. The pipeline of the screw conveyer is closed, and no particulate matters are generated in the conveying process of the epoxy resin powder. The second pulse bag type dust collector is hermetically connected with a breather valve at the top of the raw material silo, all particles discharged by the breather valve enter the second pulse bag type dust collector, and are introduced into an exhaust funnel with the diameter of 15m through a fan after being collected by the second pulse bag type dust collector and discharged. The dust removal efficiency of the second pulse bag type dust collector is 99.9 percent, and the air volume of the fan is 5000m³Per hour, annual run time 7200 h.

The waste epoxy resin powder can improve the strength and the frost resistance of the resin brick.

(3) Feeding sand and stone

Building rubbish sand and stone are poured into the hopper by manpower or a forklift and are sent into the mixing and stirring tank by a screw conveyer;

(4) stirring and mixing

After cement, waste epoxy resin powder, construction waste and water enter a mixing and stirring tank, starting a stirrer, and uniformly mixing and stirring; the process can generate dust in the initial feeding stage, and the generated dust is collected through a pipeline and is discharged in high altitude after being treated by a bag-type dust collector.

(5) Press forming

The stirred raw materials enter a forming machine for compression forming;

(6) maintaining

And carrying out normal-temperature watering maintenance on the molded bricks in a workshop for 2 days.

Example 2

A high-molecular energy-saving environment-friendly high-strength resin brick is prepared from the following raw materials in parts by weight: 350 parts of waste epoxy resin powder, 160 parts of cement, 400 parts of construction waste and 150 parts of water.

The preparation method of the resin brick is the same as that of example 1.

Example 3

A high-molecular energy-saving environment-friendly high-strength resin brick is prepared from the following raw materials in parts by weight: 400 parts of waste epoxy resin powder, 200 parts of cement, 525 parts of construction waste and 200 parts of water.

The preparation method of the resin brick is the same as that of example 1.

Example 4

A high-molecular energy-saving environment-friendly high-strength resin brick is prepared from the following raw materials in parts by weight: 360 parts of waste epoxy resin powder, 170 parts of cement, 425 parts of construction waste and 158 parts of water.

The preparation method of the resin brick is the same as that of example 1.

Example 5

A high-molecular energy-saving environment-friendly high-strength resin brick is prepared from the following raw materials in parts by weight: 385 parts of waste epoxy resin powder, 190 parts of cement, 500 parts of construction waste and 180 parts of water.

The preparation method of the resin brick is the same as that of example 1.

Examples of the experiments

1. The resin bricks prepared in example 1 were subjected to performance tests, and the results are shown in Table 1.

Table 1 performance test table of resin brick prepared in example 1

The test results in table 1 show that the compressive strength index of the resin brick of the invention reaches the strength grade MU20.0 standard of concrete solid brick (GBT 21144-.

2. The preparation method of the resin brick belongs to a project of comprehensive utilization of hazardous wastes, and in order to determine the safety of the prepared resin brick, Henan mol detection Co., Ltd is entrusted to carry out toxic substance leaching toxicity detection on the resin brick prepared in example 1, and the results are shown in Table 2.

Table 2 summary of the test results of leaching toxicity of the resin bricks of the present invention

As can be seen from Table 2, the resin brick of the invention can meet the limit requirement of the Standard "hazardous waste identification Standard Leaching toxicity identification" (GB5085.3-2007) in leaching toxicity experiments.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.