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CN116947280B - Sludge treatment method, partition plate and preparation method thereof - Google Patents

Sludge treatment method, partition plate and preparation method thereof Download PDF

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Publication number
CN116947280B
CN116947280B CN202311218410.9A CN202311218410A CN116947280B CN 116947280 B CN116947280 B CN 116947280B CN 202311218410 A CN202311218410 A CN 202311218410A CN 116947280 B CN116947280 B CN 116947280B
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Prior art keywords
sludge
meshes
layer
heating
partition plate
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CN116947280A (en
Inventor
吴庆朝
李�杰
姜佳佳
王英
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Shandong Hengtai Lihua Environmental Technology Co ltd
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Shandong Hengtai Lihua Environmental Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/88—Insulating elements for both heat and sound
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/942—Building elements specially adapted therefor slab-shaped
    • 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
    • E04C2/284—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 at least one of the materials being insulating
    • E04C2/288—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 at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/02—Odour removal or prevention of malodour
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Thermal Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention belongs to the technical field of sludge treatment and resource utilization, and discloses a sludge treatment method, a partition plate and a preparation method thereof, wherein the method comprises the following steps: adding potassium permanganate into the sludge, uniformly mixing the sludge and the potassium permanganate in a mass ratio of 8-12:1 to obtain a mixture; carrying out first-stage microwave heating on the mixture, wherein the heating temperature is 110-130 ℃, and the heating time is 10-30 min; then carrying out second-stage microwave heating, wherein the heating temperature is 180-240 ℃ and the heating time is 8-15 min; and deodorizing, grinding and sieving the sludge heated by the two sections of microwaves again to obtain the treated sludge. The treated sludge particles have smaller particle size, so that the uniform mixing with other materials can be ensured when the partition board is manufactured, the viscosity coefficient of the sludge can be increased, the viscosity of the sludge can be fully exerted, and the forming strength of the partition board can be improved.

Description

Sludge treatment method, partition plate and preparation method thereof
Technical Field
The invention belongs to the technical field of sludge treatment and resource utilization, and particularly relates to a sludge treatment method, a partition plate and a preparation method thereof.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Sludge is a solid precipitated material that can have serious environmental impact if improperly treated. The traditional methods of land utilization, landfill, incineration and the like have the defects of polluted soil, atmosphere, water and the like, so that the preferential selection of sludge treatment is volume reduction and utilization, and the sludge is subjected to volume reduction, stabilization and innocent treatment and then is used as a main stream for recycling resources, but the current sludge recycling utilization amount is small, the mode is single, and the sludge is difficult to be effectively utilized.
The partition board is a wall prefabricated slat of a non-bearing part in a building, is a novel energy-saving wall material, and can be prepared from gold tailings and other solid wastes, so that the purposes of recycling resources, saving energy and protecting environment are achieved. However, when the partition board is manufactured by adopting gold tailings at present, the adhesion effect is poor due to the fact that the ores are dry and non-sticky, and finally the manufactured partition board is low in strength and is not up to the standard in quality.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a sludge treatment method, a partition plate and a preparation method thereof.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, the present invention provides a sludge treatment method comprising the steps of:
adding potassium permanganate into the sludge, uniformly mixing the sludge and the potassium permanganate in a mass ratio of 8-12:1 to obtain a mixture;
carrying out first-stage microwave heating on the mixture, wherein the heating temperature is 110-130 ℃, and the heating time is 10-30 min;
then carrying out second-stage microwave heating, wherein the heating temperature is 180-240 ℃ and the heating time is 8-15 min;
and deodorizing, grinding and sieving the sludge heated by the two sections of microwaves again to obtain the treated sludge.
Sludge is a sediment discharged in the sewage treatment process, contains a large amount of organic matters, is easy to decompose and smell, and partition boards are wall prefabricated boards at non-bearing parts inside a building, and have strict requirements on the smell of raw materials, so that the smelly sludge is difficult to directly use for preparing the partition boards.
The potassium permanganate is a strong oxidant and bactericide, and the microwave coupling potassium permanganate is adopted to oxidize and degrade reducing substances, bacterial propagules, fungi and tubercle bacillus in the sludge, and meanwhile, a part of peculiar smell can be removed, so that the potassium permanganate is used as the oxidant, the bactericide and the deodorant, organic matters and peculiar smell in the sludge are decomposed more uniformly and rapidly, and the process steps of sludge treatment are reduced.
The first section of microwave heating aims to heat materials, promote the deodorizing reaction of potassium permanganate, increase the specific surface area of sludge particles to a certain extent and reduce the particle size of the sludge particles; the purpose of the second section of microwave heating is to change the characteristics of the sludge, further reduce the particle size of the sludge particles and increase the surface area of the sludge particles. And through two sections of microwave heating, organic matters and peculiar smell in the sludge can be effectively removed, and the sludge is dehydrated.
Experiments of the inventor show that when the sludge treated by the method is compounded with solid wastes such as gold tailings to prepare the partition plate, the sound wave absorption capacity of the partition plate can be effectively improved, and the sound insulation effect is better. In addition, as the treated sludge particles have smaller particle size, the method can ensure uniform mixing with other materials when manufacturing the partition plate, increase the viscosity coefficient of the sludge, fully exert the viscosity of the sludge and improve the forming strength of the partition plate.
In some embodiments, the method of re-deodorizing is plasma deodorizing.
In some embodiments, the water content of the sludge subjected to two-stage microwave heating is 10% -20%.
In a second aspect, the invention provides a partition plate which is of a laminated structure, wherein a material layer, a sound insulation layer, a heat preservation layer and a fireproof layer are sequentially arranged from inside to outside, and the material layer consists of the following components in parts by mass: 45-50 parts of gold tailings, 20-25 parts of treated sludge, 26-28 parts of silicate cement and 2-4 parts of waste ceramic micro powder.
Gold mine tailings are an important secondary mineral resource, but the gold tailings and sludge are low in recycling utilization amount at present, the mode is single, and a treatment method with large treatment capacity and high utilization rate is urgently needed.
When the inventor tries to prepare the partition board by adopting gold tailings, the bonding effect is poor, a large amount of adhesive is needed, the particle size of sludge particles after pretreatment and microwave heating is reduced, the viscosity coefficient is also increased, the viscosity of the sludge is increased, the partition board is prepared by compounding the sludge and the gold tailings, the bonding capability of the sludge is fully exerted, and the strength of the partition board is improved.
In addition, the gold tailings and the sludge are added into the partition plate in a relatively large proportion, so that the two solid wastes of the gold tailings and the sludge can be effectively utilized.
The waste ceramic micro powder can effectively improve the strength, impact resistance, wear resistance and the like of the partition plate.
In some embodiments, the gold tailings are classified into 10-30 mesh, 80-100 mesh and 200-300 mesh, wherein the ratio of the gold tailings with 10-30 mesh is 10% -20%, the ratio of the gold tailings with 80-100 mesh is 20% -40%, and the ratio of the gold tailings with 200-300 mesh is 40% -70%.
The different grain sizes can ensure that the material layers are compacter in occlusion, more uniform in space filling, higher in strength and bending resistance, and the ore component is mainly SiO 2 The finer tailing stone particles can play the same role of fixation as cement, as the main component of cement.
In some embodiments, the waste ceramic micropowder has a particle size greater than 200 mesh. Can make useless ceramic micro powder and gold tail ore, mud, silicate cement mix more evenly, the shaping effect is better, partition plate bulk strength is higher.
The waste ceramic fine powder includes, but is not limited to, waste silicon carbide ceramic, waste silicon nitride ceramic, waste alumina ceramic, and the like.
The sound insulation layer is made of polyurethane foam, the heat insulation layer is made of polyisocyanurate, and the fireproof layer is made of brominated polystyrene.
In some embodiments, one side of the partition plate is provided with a tenon and the other side is provided with a mortise. The protruding length of tenon is 50~70mm, and protruding width is 60~80mm, tongue-and-groove sunken degree of depth is 50~70mm, and sunken width is 70~90mm, and the area of contact is big after the partition plate concatenation under this size, reserves out and paints the binder space, and the bonding is more fastening, and the structure is more stable.
In a third aspect, the present invention provides a method for preparing the partition plate, comprising the steps of:
uniformly mixing sludge, gold tailings, silicate cement and waste ceramic micro powder according to a proportion to obtain a mixed material;
pouring and molding the mixed material, and roasting to obtain a material layer;
sticking sound insulation layers on two sides of the material layer;
sticking an insulation layer on the outer side of the sound insulation layer;
and sticking a fireproof layer on the outer side of the heat preservation layer, and compacting.
In some embodiments, the baking temperature is 600-800 ℃ and the baking time is 8-10 hours.
The beneficial effects achieved by one or more embodiments of the present invention described above are as follows:
according to the invention, the gold tailings in the raw materials account for 45% -50%, the use amount of the tailings stone is approximately 1 time higher than that in the conventional partition plate manufacturing method, the gold mine tailings are consumed in a large amount, the problem that the tailings are difficult to treat is solved, and the utilization rate of the tailings is improved.
According to the invention, the gold tailing ore is crushed into three particle sizes of 10-30 meshes, 80-100 meshes and 200-300 meshes, wherein the mass ratio of the three particle sizes is 10% -20%, 20% -40% and 40% -70%, the particle sizes are different, so that the material layer is more compact compared with the conventional single particle size filling, the strength and the bending resistance are higher, and the gold tailing stone component is mainly SiO 2 The finer tailing stone particles have the same fixing effect as cement, and the main components of the fine tailing stone particles are the same as cement.
The invention has large sludge addition amount and solves the problem that the sludge cannot be utilized in a large amount.
According to the invention, the partition board prepared by compounding the pretreated sludge and the gold tailings has better sound insulation performance, and the reason is that the specific surface area of the pretreated sludge particles is increased, the sludge particles are more in pores, and the partition board prepared by compounding the sludge and the gold tailings has stronger sound absorption capability and better sound insulation effect.
When the gold tailings are independently used for manufacturing the partition boards, the bonding effect is poor, a large amount of adhesive is needed to be added, the particle size of sludge particles subjected to pretreatment microwave heating is reduced, the viscosity coefficient is also increased, the viscosity of the sludge is increased, the sludge is compounded with the gold tailings to manufacture the partition boards, the bonding capability of the sludge is fully exerted, and the strength of the partition boards is improved.
The waste ceramic micro powder is added, the particle size of the waste ceramic micro powder is larger than 200 meshes, the waste ceramic micro powder can be uniformly mixed with gold tailings, sludge and silicate cement, the forming effect is better, and the integral strength of the partition plate is higher.
The polyurethane foam is used as the sound insulation layer, is less prone to water absorption and falling in comparison with a rock wool layer, and is excellent in sound insulation and fireproof performance.
The invention adopts the polyisocyanurate to replace the polystyrene which is a heat insulation material commonly used at present, has more excellent physical and fireproof performance, small heat conduction coefficient, strong compression resistance and light weight and shock resistance. And polystyrene is inflammable and generates toxic gas after burning.
The present invention employs brominated polystyrene as a flame retardant layer, which has excellent thermal stability. The flame retardant is generally used for occasions which cannot be born by other flame retardants, and has the advantages of fireproof performance, moisture resistance, long service life, low heat conductivity, impact vibration resistance, heat insulation, sound insulation, moisture resistance and the like.
The wall body adopts the mortise and tenon structure, is easier to splice compared with partition boards with fixed specifications on the market, has large contact area during splicing, reserves a gap for smearing an adhesive, is more firmly bonded, and has more stable structure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic cross-sectional view of a partition panel made in accordance with an embodiment of the present invention;
fig. 2 is a schematic diagram of the overall structure of a partition board according to an embodiment of the present invention.
In the figure: 1. the material layer, 2, the flame retardant coating, 3, the heat preservation, 4, the puigging, 5, the tongue-and-groove, 6, tenon.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The invention is further illustrated below with reference to examples.
Example 1
As shown in fig. 1 and 2, the partition plate mainly comprises a material layer 1, a fireproof layer 2, an insulating layer 3 and a sound insulation layer 4. The material layer 1 outside is puigging 4, the puigging 4 outside is heat preservation 3, the heat preservation 3 outside is flame retardant coating 2, and each layer adopts 108 building glue to bond.
The sound insulation layer 4 is made of polyurethane foam, the heat insulation layer 3 is made of polyisocyanurate, and the fireproof layer 2 is made of brominated polystyrene.
The preparation method of the partition plate comprises the following steps:
s1, weighing gold tailings with the mass fraction of 50% of a material layer, wherein the mass fractions of three particle sizes of 10-30 meshes, 80-100 meshes and 200-300 meshes are respectively 10%, 20% and 70%.
S2, firstly adding potassium permanganate into the sludge, uniformly stirring to obtain a mixture, wherein the adding ratio of the sludge to the potassium permanganate is 10:1, and removing peculiar smell generated by the sludge.
S3, the physical properties of the sludge can be changed more thoroughly by using a two-stage microwave heating process for the mixture, and then part of organic matters and peculiar smell in the sludge are removed, and the sludge is dehydrated to 20% of water content. Wherein, the heating power of the first section of microwave is 600W, the heating temperature is 120 ℃, and the heating time is 15min; the heating power of the second section of microwave is 800W, the heating temperature is 200 ℃, and the heating time is 10min. Finally, removing residual slight peculiar smell by a plasma deodorization process.
S4, grinding and sieving, wherein the particle size is larger than 100 meshes.
S5, weighing pretreated sludge accounting for 20% of the material layer, and weighing 108 building glue accounting for 10% of gold tail ore and waste ceramic micro powder accounting for 4% of the material layer. And uniformly mixing Portland cement with the mass of 26% of the material layer and 108 building glue for standby, adding the crushed gold tail ore, pretreated sludge and waste ceramic micro powder into the cement glue water mixture, and uniformly stirring after mixing to obtain a mixed material.
S6, fixing the die on a workbench surface, smearing a layer of saponified oil or emulsified oil on the inner wall of the die, and pouring the mixed material into the die. One side of the partition board is provided with a tenon, and the other side is provided with a mortise. The protruding length of tenon is 50mm, and protruding width is 60mm, tongue-and-groove recess degree of depth is 50mm, and the recess width is 70mm. Pouring the mixed material into a mould.
S7, standing for 12 hours after pouring, waiting for the material to be molded, wherein the strength reaches 2Mpa, the water content is 1% -2%, roasting, the roasting temperature is 600 ℃, the appearance of the roasted material is free from cracks, unfilled corners and indentation, and the compressive strength is more than 15Mpa.
S8, adhering a sound insulation layer with 108 building glue on the outer side of the material layer, wherein the thickness is 4cm.
S9, adhering a heat insulation layer with 108 building glue on the outer side of the sound insulation layer, wherein the thickness is 6cm.
S10, adhering a fireproof layer with the thickness of 1cm on the outer side of the heat-insulating layer by using 108 building glue, and finally compacting to form a product.
The partition board is suitable for wall construction with high heat preservation requirements in cold chain processing factories and the like.
Example 2
S1, weighing gold tailings with the mass fraction of 47% of a material layer, wherein the mass fractions of three particle sizes of 10-30 meshes, 80-100 meshes and 200-300 meshes are respectively 15%, 30% and 55%.
S2, firstly adding potassium permanganate into the sludge, uniformly stirring to obtain a mixture, wherein the adding ratio of the sludge to the potassium permanganate is 10:1, and removing peculiar smell generated by the sludge.
S3, the physical properties of the sludge can be changed more thoroughly by using a two-stage microwave heating process for the mixture, and then part of organic matters and peculiar smell in the sludge are removed, and the sludge is dehydrated to 20% of water content. Wherein, the heating power of the first section of microwave is 600W, the heating temperature is 120 ℃, and the heating time is 15min; the heating power of the second section of microwave is 800W, the heating temperature is 200 ℃, and the heating time is 10min. Finally, removing residual slight peculiar smell by a plasma deodorization process.
S4, grinding and sieving, wherein the particle size is larger than 100 meshes.
S5, weighing 23% of pretreated sludge by mass of the material layer, and weighing 10% of 108 building glue by mass of gold tail ore and 3% of waste ceramic micro powder by mass of the material layer. And uniformly mixing Portland cement with the mass of 27% of the material layer and 108 building glue for standby, adding the crushed gold tail ore, pretreated sludge and waste ceramic micro powder into the cement glue water mixture, and uniformly stirring after mixing to obtain a mixed material.
S6, fixing the die on a workbench surface, smearing a layer of saponified oil or emulsified oil on the inner wall of the die, and pouring the mixed material into the die. One side of the partition board is provided with a tenon, and the other side is provided with a mortise. The tenon protrusion length is 60mm, the protrusion width is 70mm, the mortise depression depth is 60mm, and the depression width is 80mm. Pouring the mixed material into a mould.
And S7, standing for 12 hours after pouring, waiting for the material to be molded, wherein the strength reaches 2Mpa, the water content is 1% -2%, roasting at the temperature of 700 ℃, and the appearance of the roasted material is free from cracks, unfilled corners and indentation, and the compressive strength is more than 15Mpa.
S8, adhering a sound insulation layer with 108 building glue on the outer side of the material layer, wherein the thickness is 4cm.
S9, adhering a heat insulation layer with 108 building glue on the outer side of the sound insulation layer, wherein the thickness is 2cm.
S10, adhering a fireproof layer with the thickness of 3cm on the outer side of the heat-insulating layer by using 108 building glue, and finally compacting to form a product.
The partition board is suitable for wall construction with high fireproof requirements in factory fireproof and explosion-proof areas and the like.
Example 3
S1, weighing gold tailings with the mass fraction of 45% of a material layer, wherein the mass fractions of three particle sizes of 10-30 meshes, 80-100 meshes and 200-300 meshes are respectively 20%, 40% and 40%.
S2, firstly adding potassium permanganate into the sludge, uniformly stirring to obtain a mixture, wherein the adding ratio of the sludge to the potassium permanganate is 10:1, and removing peculiar smell generated by the sludge.
S3, the physical properties of the sludge can be changed more thoroughly by using a two-stage microwave heating process for the mixture, and then part of organic matters and peculiar smell in the sludge are removed, and the sludge is dehydrated to 20% of water content. Wherein, the heating power of the first section of microwave is 600W, the heating temperature is 120 ℃, and the heating time is 15min; the heating power of the second section of microwave is 800W, the heating temperature is 200 ℃, and the heating time is 10min. Finally, removing residual slight peculiar smell by a plasma deodorization process.
S4, grinding and sieving, wherein the particle size is larger than 100 meshes.
S5, weighing pretreated sludge accounting for 25% of the material layer, and weighing 108 building glue accounting for 10% of gold tail ore and waste ceramic micro powder accounting for 2% of the material layer. And uniformly mixing Portland cement with the mass of 28% of the material layer and 108 building glue for standby, adding the crushed gold tail ore, pretreated sludge and waste ceramic micro powder into the cement glue water mixture, and uniformly stirring after mixing to obtain a mixed material.
S6, fixing the die on a workbench surface, smearing a layer of saponified oil or emulsified oil on the inner wall of the die, and pouring the mixed material into the die. One side of the partition board is provided with a tenon, and the other side is provided with a mortise. The tenon protrusion length is 70mm, the protrusion width is 80mm, the mortise depression depth is 70mm, and the depression width is 90mm. Pouring the mixed material into a mould.
And S7, standing for 12 hours after pouring, waiting for the material to be molded, wherein the strength reaches 2Mpa, the water content is 1% -2%, roasting at the temperature of 700 ℃, and the appearance of the roasted material is free from cracks, unfilled corners and indentation, and the compressive strength is more than 15Mpa.
S8, adhering a sound insulation layer with 108 building glue on the outer side of the material layer, wherein the thickness is 8cm.
S9, adhering a heat insulation layer with 108 building glue on the outer side of the sound insulation layer, wherein the thickness is 4cm.
S10, adhering a fireproof layer with the thickness of 3cm on the outer side of the heat-insulating layer by using 108 building glue, and finally compacting to form a product.
The partition board is suitable for wall construction with high sound insulation and fire protection requirements of movie theatres and the like.
Comparative example 1
The difference from example 2 is that: and (3) replacing the gold tailings with the mass fraction of 47% of the material layer with the mass fractions of 15%, 30% and 55% of three particle sizes of 10-30 meshes, 80-100 meshes and 200-300 meshes, wherein the particle size is 200-300 meshes.
Comparative example 2
The differences from example 3 are: the step of adding potassium permanganate is omitted.
Comparative example 3
The differences from example 3 are: the step of two-stage microwave heating is omitted.
The performance of the partition boards of examples 1 to 3 and comparative examples 1 to 3 was tested, and the specific results are shown in Table 1:
table 1 Performance test of the partition wall Material of examples 1 to 3, comparative examples 1 to 3
The sound insulation effect detection method comprises the following steps: and arranging partition boards between the fixed 80 dB sound source and the decibel meter, and testing the sound insulation performance of the partition boards of all the embodiments.
The compressive strength testing method comprises the following steps: the method is carried out by adopting equipment such as a press machine, and comprises the following specific operation steps: the sample was placed on a press, the compression force was gradually increased, the compression force at the time of failure was recorded, and the compressive strength was calculated.
The smell detection method comprises the following steps: the sample is placed in a room for 12 hours, and sulfur dioxide, formaldehyde and benzene series are detected according to the method in GB/T18883-2022.
The bending load/self weight detection method comprises the following steps:
1. placing the wallboard test piece on two parallel supports with the length of the supports being greater than the width of the board, and adjusting the spacing of the supports to L (L0-100) mm, wherein the extension lengths of the two ends are the same;
2. the wallboard sample is arranged on a testing machine according to the related requirements, so that the load is uniformly applied to the tested wallboard through the distribution beam and the pressing shaft, and 4 dial indicators can be arranged on the wallboard according to the requirements for testing deflection;
3. standing for 2min in idle load, and recording initial readings of the dial indicator according to the specified accuracy;
4. uniformly applying a load P (N) to a wallboard test piece by adopting a graded load application method, and determining the size of the load P (N) of each grade according to the weight W (N) of the test piece and the total weight WP (N) of devices such as a distribution beam, a pressing shaft and the like;
5. and after each stage of loading is completed, standing for 2min until the loading reaches the bending load specified by wallboard product standards, and standing for 5min. If the test piece is not damaged at this time, load can be continuously applied to the test piece in the same grading loading mode until the test piece is damaged, the obtained maximum damage load Pmax is recorded, and the maximum uniformly distributed damage load of the wallboard is (Pmax+WP) N.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A partition plate, characterized in that: the material layer, the sound insulation layer, the heat preservation layer and the fireproof layer are sequentially arranged from inside to outside;
the material layer consists of the following components in parts by mass: 45-50 parts of gold tailings, 20-25 parts of sludge, 26-28 parts of silicate cement and 2-4 parts of waste ceramic micro powder;
the treatment method for the sludge comprises the following steps:
adding potassium permanganate into the sludge, uniformly mixing the sludge and the potassium permanganate in a mass ratio of 8-12:1 to obtain a mixture;
carrying out first-stage microwave heating on the mixture, wherein the heating temperature is 110-130 ℃, and the heating time is 10-30 min;
then carrying out second-stage microwave heating, wherein the heating temperature is 180-240 ℃ and the heating time is 8-15 min;
deodorizing, grinding and sieving the sludge heated by the two sections of microwaves again to obtain treated sludge;
the method of deodorization again is plasma deodorization;
the water content of the sludge heated by the two sections of microwaves is 10% -20%;
the gold tailings are divided into 10-30 meshes, 80-100 meshes and 200-300 meshes, wherein the ratio of the gold tailings with 10-30 meshes is 10% -20%, the ratio of the gold tailings with 80-100 meshes is 20% -40%, and the ratio of the gold tailings with 200-300 meshes is 40% -70%.
2. The partition panel of claim 1, wherein: the particle size of the waste ceramic micro powder is larger than 200 meshes.
3. The partition panel of claim 1, wherein: the waste ceramic fines include, but are not limited to, waste silicon carbide ceramic, waste silicon nitride ceramic, and waste alumina ceramic.
4. The partition panel of claim 1, wherein: one side of the partition plate is provided with a tenon, and the other side is provided with a mortise.
5. The method for preparing the partition plate according to any one of claims 1 to 4, which is characterized in that: the method comprises the following steps:
uniformly mixing sludge, gold tailings, silicate cement and waste ceramic micro powder according to a proportion to obtain a mixed material;
pouring and molding the mixed material, and roasting to obtain a material layer;
sticking sound insulation layers on two sides of the material layer;
sticking an insulation layer on the outer side of the sound insulation layer;
and sticking a fireproof layer on the outer side of the heat preservation layer, and compacting.
6. The method of manufacturing according to claim 5, wherein: the roasting temperature is 600-800 ℃, and the roasting time is 8-10 h.
CN202311218410.9A 2023-09-21 2023-09-21 Sludge treatment method, partition plate and preparation method thereof Active CN116947280B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102190417A (en) * 2010-03-10 2011-09-21 中国科学院生态环境研究中心 Microwave-hydrogen peroxide synergism-based method and device for treating residual sludge
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CN106007668A (en) * 2016-05-24 2016-10-12 青岛创三元环保新材料有限公司 Fabricated inorganic heat-insulation composite wallboard and preparation method thereof
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