CN108202393B - Method for producing novel environment-friendly board by using circuit board powder and magnesium cementing material - Google Patents
Method for producing novel environment-friendly board by using circuit board powder and magnesium cementing material Download PDFInfo
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- CN108202393B CN108202393B CN201810021786.3A CN201810021786A CN108202393B CN 108202393 B CN108202393 B CN 108202393B CN 201810021786 A CN201810021786 A CN 201810021786A CN 108202393 B CN108202393 B CN 108202393B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
- B28B13/0235—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities the feed box being provided with agitating means, e.g. stirring vanes to avoid premature setting of the moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a method for producing a novel environment-friendly board by using circuit board powder and a magnesium cementing material. The main material composition of the produced novel environment-friendly board comprises: circuit board powder, magnesium oxide, magnesium chloride, water, modifier and medium-alkali glass fiber net. The production method of the novel environment-friendly board solves the problems that the existing board made of waste circuit powder is made of aldehyde glue or polyurethane glue, the cost is high, secondary pollution is easy to occur, the production safety is not enough, and the like, and simultaneously, the physical and mechanical properties of the environment-friendly board are improved. Because circuit board powder is not absorbent, the flash point is high, this novel environmental protection panel has: environmental protection, no aldehyde and phenol, water resistance, fire resistance, small natural deformation, high corrosion resistance and use strength and the like.
Description
Technical Field
The invention relates to a method for producing a novel environment-friendly plate. In particular to a method for producing a waterproof, fireproof, aldehyde-free and phenol-free environment-friendly board by using circuit board powder and a magnesium cementing material.
Background
With the rapid development of social economy, the electronic manufacturing industry is developing at an astonishing speed, the updating speed of electronic products is continuously accelerated, the market expansion and technical innovation further promote the increase of the total quantity of scrapped electronic and electric equipment, and great pressure is brought to environmental protection and resource recovery. At present, China has become the first production and consumption kingdom of electronic and electric products. Resource research of waste electronic circuit boards is a key point and a difficult point of resource utilization of electronic wastes. The novel high polymer material PCB powder has the characteristics of large quantity, high potential value, large environmental hazard and the like, so that the high polymer material PCB powder resource has important recovery value and environmental protection significance. However, the technical management is backward in the novel high polymer material PCB powder recovery treatment process in China, or the novel high polymer material PCB powder is stacked or buried, so that the novel high polymer material PCB powder occupies land and is easy to generate dust, and environmental pollution of water, atmosphere and soil is caused. The technology can realize the harmless, quantitative-reduction and resource recycling comprehensive utilization of the PCB powder. The method plays a role in promoting the healthy development of the electronic industry in China.
On the other hand, in recent years, countries limit the cutting of natural forest trees in different ways under the severe situation that global ecological crisis approaches. The high-quality wood needed by people in life is less and more expensive. Meanwhile, the Chinese building decoration material industry is rapidly developed along with the development of real estate and building decoration industry. At present, China has become a world wide country for producing, consuming and exporting decorative materials. Materials dominate products not only in the first place in the world in total for many years, but the per-capita consumption index has approached and exceeded the world's advanced level. Therefore, the novel environment-friendly board produced by using the waste circuit boards and the leftover materials can not only solve the problem of shortage of raw material resources of the wood industry in China, but also reduce the pollution of the high polymer material PCB powder to the environment, and make great contribution to the environment protection, the earth beautification and the beautiful China construction. The novel environment-friendly board produced by utilizing the circuit board powder and the magnesium cementing material has the advantages that: no aldehyde and phenol, water resistance, fire resistance, small natural deformation, high corrosion resistance, high use strength and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for producing a novel environment-friendly board by using circuit board powder and a magnesium cementing material.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the method for producing the novel environment-friendly board by using the circuit board powder and the magnesium cementing material comprises the following steps:
(1) continuously drying the circuit board powder to ensure that the water content of the circuit board powder is uniform and consistent, controlling the drying temperature to be 155-165 ℃ and preferably 160 ℃, and controlling the water content of the dried circuit board powder to be 8-12% and preferably 10%;
(2) mixing the dried circuit board powder and magnesium oxide according to the weight ratio of 1: (1-1.5) simultaneously injecting the mixture into a continuous mixer to be uniformly mixed to obtain a mixed material A; mixing magnesium chloride with water to form a brine solution with the mass percent concentration of the magnesium chloride of 30-36%;
(3) feeding the mixed material A into an intermittent stirrer to be stirred (the weight of the mixed material A is determined according to the volume of the intermittent stirrer which can stir each time, the intermittent stirrer can stir 300kg of the mixed material A), adding the brine solution and the modifier into the intermittent stirrer to be stirred together with the mixed material A, and obtaining a mixed material B; wherein the weight ratio of the mixed material A to the brine solution is (1.5-2): 1, the adding weight of the modifier is not more than 1 percent of the weight of the mixed material A;
(4) the mixture material B and the glass fiber net are paved in a layered mode to form a uniform and flat plate blank of the novel environment-friendly plate;
(5) prepressing the plate blank of the plate by adopting a continuous prepress and a multi-layer constant-temperature press, and then pressing and forming at constant temperature to form a rough plate; the constant-temperature pressurizing temperature is controlled between 30 and 40 ℃, the pressurizing time is 2.5 to 4min/mm of plate thickness, and the surface pressure is 35 to 40Kg/cm2(the pressure is determined by the thickness of the sheet and the pressing time, and the pressure is 35-40 Kg/cm2) (ii) a The pressure curve chart is subjected to quick closing, slow pressurization, pressure maintaining and slow pressure relief. Therefore, the slurry can be fully and completely glued with the circuit board powder and the woven glass fiber mesh, and water vapor and residual air generated in the pressing process of the plate blank can be effectively and maximally released, so that the expansion and deformation of the plate blank are prevented, and the compactness is improved;
(6) the rough board is placed in a curing room with the constant temperature of 40 +/-5 ℃, the constant humidity of 80 +/-5% and good indoor air fluidity for curing for more than 72 hours; and sawing edges of the maintained rough boards to produce novel environment-friendly boards of various specifications.
Preferably, the modifier in step (3) is an anti-halogen back-up agent or a coupling agent.
Preferably, the glass fiber net in the step (4) is a medium-alkali glass fiber net.
Preferably, the step (4) of laying the mixture material B and the glass fiber web in layers comprises the following specific steps: the mixed material B is paved by multiple heads, the glass fiber net is placed between every two assembling heads, and after the mixed material B is paved, the glass fiber net is paved, so that the mixed material B and the glass fiber net are paved in a layered mode, and uniform and flat plate blanks are formed.
The novel environment-friendly board prepared by the method does not contain organic adhesive, and can realize recycling of real environment friendliness.
The production method of the novel environment-friendly board solves the problems that the existing board made of waste circuit powder is made of aldehyde glue or polyurethane glue, the cost is high, secondary pollution is easy to occur, the production safety is not enough, and the like, and simultaneously, the physical and mechanical properties of the environment-friendly board are improved. Because circuit board powder is not absorbent, the flash point is high, this novel environmental protection panel has: environmental protection, no aldehyde and phenol, water resistance, fire resistance, small natural deformation, high corrosion resistance and use strength and the like.
Drawings
FIG. 1 is a flow chart of the method for producing the novel environment-friendly board by using the circuit board powder and the magnesium cementing material.
Detailed Description
Referring to fig. 1, the method for producing the novel environment-friendly board by using the circuit board powder and the magnesium cementing material comprises the following steps:
(1) continuously drying the circuit board powder to ensure that the water content of the circuit board powder is uniform and consistent, and controlling the drying temperature to be 160 ℃ and the water content of the dried circuit board powder to be 10%;
(2) mixing the dried circuit board powder and magnesium oxide according to the weight ratio of 1: (1-1.5) simultaneously injecting the mixture into a continuous mixer to be uniformly mixed to obtain a mixed material A; mixing magnesium chloride with water to form a brine solution with the mass percent concentration of the magnesium chloride of 30-36%;
(3) feeding the mixed material A into an intermittent stirrer to be stirred (the weight of the mixed material A is determined according to the volume of the intermittent stirrer which can stir each time, the intermittent stirrer can stir 300kg of the mixed material A), adding the brine solution and the modifier into the intermittent stirrer to be stirred together with the mixed material A, and obtaining a mixed material B; wherein the weight ratio of the mixed material A to the brine solution is (1.5-2): 1, the adding weight of the modifier is not more than 1 percent of the weight of the mixed material A; the modifier is an anti-halogen back-off agent or a coupling agent;
(4) paving the mixed material B by adopting multiple heads, placing the glass fiber net between every two heads, paving a layer of glass fiber net after paving a layer of mixed material B, realizing the layered paving of the mixed material B and the glass fiber net, and forming a uniform and flat plate blank; the glass fiber net is a medium-alkali glass fiber net;
(5) prepressing the plate blank of the plate by adopting a continuous prepress and a multi-layer constant-temperature press, and then pressing and forming at constant temperature to form a rough plate; the constant-temperature pressurizing temperature is controlled between 30 and 40 ℃, the pressurizing time is 2.5 to 4min/mm of plate thickness, and the surface pressure is 35 to 40Kg/cm2(the pressure is determined by the thickness of the sheet and the pressing time, and the pressure is 35-40 Kg/cm2) (ii) a The pressure curve chart is subjected to quick closing, slow pressurization, pressure maintaining and slow pressure relief. Therefore, the slurry can be fully and completely glued with the circuit board powder and the woven glass fiber mesh, and water vapor and residual air generated in the pressing process of the plate blank can be effectively and maximally released, so that the expansion and deformation of the plate blank are prevented, and the compactness is improved;
(6) the rough board is placed in a curing room with the constant temperature of 40 +/-5 ℃, the constant humidity of 80 +/-5% and good indoor air fluidity for curing for more than 72 hours; and sawing edges of the maintained rough boards to produce novel environment-friendly boards of various specifications.
The novel environment-friendly board prepared by the method does not contain organic adhesive, and can realize recycling of real environment friendliness.
Claims (2)
1. A method for producing a novel environment-friendly board by using circuit board powder and a magnesium cementing material is characterized by comprising the following steps: (1) continuously drying the circuit board powder to ensure that the water content of the circuit board powder is uniform and consistent, controlling the drying temperature to be 155-165 ℃ and the water content of the dried circuit board powder to be 8-12%;
(2) mixing the dried circuit board powder and magnesium oxide according to the weight ratio of 1: (1-1.5) uniformly mixing to obtain a mixed material A; mixing magnesium chloride with water to form a brine solution with the mass percent concentration of the magnesium chloride of 30-36%;
(3) feeding the mixed material A into an intermittent stirrer for stirring, adding the brine solution and the modifier into the intermittent stirrer for stirring together with the mixed material A to obtain a mixed material B; wherein the weight ratio of the mixed material A to the brine solution is (1.5-2): 1, the adding weight of the modifier is not more than 1 percent of the weight of the mixed material A;
(4) the mixture material B and the glass fiber net are paved in a layered mode to form a uniform and flat plate blank of the novel environment-friendly plate;
(5) prepressing a plate blank of the plate, and then pressing and forming at constant temperature to form a rough plate; the constant-temperature pressurizing temperature is controlled between 30 and 40 ℃, the pressurizing time is 2.5 to 4min/mm of plate thickness, and the surface pressure is 35 to 40Kg/cm2；
(6) The rough board is placed in a curing room with the constant temperature of 40 +/-5 ℃, the constant humidity of 80 +/-5% and good indoor air fluidity for curing for more than 72 hours; sawing edges of the maintained rough boards to produce novel environment-friendly boards with various specifications;
the modifier in the step (3) is an anti-halogen back agent or a coupling agent;
the glass fiber net in the step (4) is a medium-alkali glass fiber net;
the concrete steps of paving the mixture material B and the glass fiber net in a layered manner in the step (4) are as follows: the mixed material B is paved by multiple heads, the glass fiber net is placed between every two assembling heads, and after the mixed material B is paved, the glass fiber net is paved, so that the mixed material B and the glass fiber net are paved in a layered mode, and uniform and flat plate blanks are formed.
2. The method of claim 1, wherein the novel environmentally friendly sheet material produced by the method is free of organic binders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021786.3A CN108202393B (en) | 2018-01-10 | 2018-01-10 | Method for producing novel environment-friendly board by using circuit board powder and magnesium cementing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021786.3A CN108202393B (en) | 2018-01-10 | 2018-01-10 | Method for producing novel environment-friendly board by using circuit board powder and magnesium cementing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108202393A CN108202393A (en) | 2018-06-26 |
| CN108202393B true CN108202393B (en) | 2020-05-08 |
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| CN201810021786.3A Active CN108202393B (en) | 2018-01-10 | 2018-01-10 | Method for producing novel environment-friendly board by using circuit board powder and magnesium cementing material |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI366421B (en) * | 2008-08-22 | 2012-06-11 | Nanya Plastics Corp | High thermal conductivity, high glass transition temperature (tg) resin composition and its pre-impregnated and coating materials for printed circuit boards |
| CN102964109B (en) * | 2012-12-21 | 2013-09-11 | 清远新绿环建筑材料有限公司 | Production process of magnesium oxide ecological board |
| CN104588393B (en) * | 2014-12-31 | 2016-10-12 | 陈烽锋 | Utilize the method that old circuit board and leftover bits manufacture novel non-wood environment-friendly sheet |
| CN106882949A (en) * | 2015-12-15 | 2017-06-23 | 万智慧 | A kind of magnesite board of high intensity and preparation method thereof |
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