CN114956766B - Modified water glass fire clay for fire-resistant cable and preparation method thereof - Google Patents
Modified water glass fire clay for fire-resistant cable and preparation method thereof Download PDFInfo
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- CN114956766B CN114956766B CN202210542286.0A CN202210542286A CN114956766B CN 114956766 B CN114956766 B CN 114956766B CN 202210542286 A CN202210542286 A CN 202210542286A CN 114956766 B CN114956766 B CN 114956766B
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- fire
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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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
- C04B2111/20—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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- 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
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
- C04B2111/763—High temperatures
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a modified water glass fire clay for a fire-resistant cable and a preparation method thereof, wherein the preparation method comprises the following steps: s1, adding 60-65 parts by weight of an inorganic fireproof agent, 0.1-1 part by weight of a humectant, 5-10 parts by weight of a lubricant, 1 part by weight of a curing agent and 0.01 part by weight of a solid powder filler into 20 parts by weight of medium-modulus liquid sodium silicate; step S2, uniformly mixing the inorganic fireproof agent, the humectant, the lubricant, the curing agent and the solid powder filler in the step S1; s3, performing ultrasonic treatment on the refractory mortar mixed in the step S2; and S4, stirring the refractory clay subjected to ultrasonic treatment in the step S3, adjusting the refractory clay into a thick paste without blocks, and standing. The invention has the advantages of high fire resistance, good ductility, no toxicity, long service life and the like, and greatly reduces the production cost by using a large amount of waste materials such as phosphogypsum powder, dried printing and dyeing sludge and the like.
Description
Technical Field
The invention relates to the field of refractory mortar preparation, in particular to a modified water glass refractory mortar for a refractory cable and a preparation method thereof.
Background
According to statistics, the fire disaster caused by electrical reasons accounts for about 50% of the fire disaster in China. In the event of a fire, the flame may ignite the insulation and sheathing materials in the conventional wire and cable, thereby generating a large amount of smoke and toxic and harmful gases, resulting in further expansion of the fire accident. Particularly in the occasions such as the underground station of the rail transit with narrow space, dense personnel and high humidity, a large amount of smoke and toxic and harmful gas are combined in case of fire accident, and the large amount of smoke and toxic and harmful gas are more difficult to disperse in case of fire accident. If the power supply safety of the fire control cables such as the control line of the fire control equipment, the signal transmission line of the fire automatic alarm system, the fire control broadcasting line, the fire control telephone line and the like cannot be ensured, the correct fire control and evacuation modes are started, and larger life and property losses are easily caused. Therefore, fire-resistant cables have stringent requirements. The fire-resistant insulation is the most important component of the fire-resistant cable. The fire-resistant insulating layer material imparts excellent fire resistance properties to the fire-resistant cable. The fire-resistant cable is widely applied to high-rise buildings, power plants and national defense aviation fields with high fireproof requirements. Through decades of research, the manufacturing technology of the fire-resistant insulating layer material for the fire-resistant cable in China has made great progress, but compared with foreign countries, the fire-resistant insulating layer material for the fire-resistant cable has a small gap. The fire clay is a good fire-resistant insulating layer material, and has good fire resistance, good plasticity, convenient construction and low cost. The refractory mortar consists of refractory powder, binding agent and additive, and almost all refractory raw materials can be prepared into powder for preparing the refractory mortar on the premise of meeting the performances of fluidity and the like.
The tendency of heavy water and light mud in the printing and dyeing sewage treatment industry causes that the problems of printing and dyeing sludge guarding and harmless treatment are not paid attention to and solved, and a large amount of sludge rich in heavy metal elements such as copper, chromium, zinc, arsenic and the like and harmful substances such as bacteria and the like are randomly piled up and discharged to cause secondary pollution. The internal water content of the sludge discharged by printing and dyeing enterprises is high, the sludge is difficult to dewater, the components are very complex, the sludge has a certain viscosity and other specificities, the treatment and disposal of the sludge need to be carried out in the steps of separation, stabilization, digestion, dewatering, disposal and the like, and a great amount of capital investment and high operation cost are needed. 10 tons of wet sludge are produced per 1000 tons of dyeing and finishing wastewater treated, and 1.5 cubic meters of dry sludge is dehydrated. According to incomplete statistics, about 1.5 ten thousand t of printing and dyeing sludge is discharged in China, and an industry expert indicates that the treatment and disposal of the printing and dyeing sludge become important restriction factors for sustainable development of a plurality of cities in China. The harmless treatment of the printing and dyeing sludge generally adopts means such as landfill, incineration and the like, the landfill has leakage risk, the incineration process has high energy consumption, waste gas, waste residue and secondary pollution are generated, the printing and dyeing sludge subjected to microwave photocatalytic drying treatment is rich in heavy metal and inorganic cementing materials which are easy to combine with crystal water, and the printing and dyeing sludge can be used as special fire-resistant sludge for cables by combining inorganic fire retardants and water glass.
As a byproduct of the phosphorus compound fertilizer, comprehensive utilization of phosphogypsum has been long explored in the industry. The most common treatment mode is piling and building materials, but the two modes can not thoroughly solve the problems: the stacking is at unpredictable risk, occupies a large amount of space, and is not sustainable; the quality and cost defects of phosphogypsum are limited when the phosphogypsum is used as a building material, and the downstream popularization difficulty is high.
Disclosure of Invention
The invention aims to solve the technical problems and provides modified sodium silicate fire clay for a fire-resistant cable and a preparation method thereof.
The technical scheme for solving the technical problems is as follows:
the preparation method of the modified water glass fire clay for the fire-resistant cable comprises the following steps:
step S1, adding 60-65 parts by weight of inorganic fireproof agent, 0.1-1 part by weight of humectant, 1-5 parts by weight of lubricant, 1 part by weight of curing agent and 0.01 part by weight of solid powder filler into 20 parts by weight of medium-modulus liquid water glass, and uniformly mixing to obtain primary refractory clay;
and S2, carrying out ultrasonic treatment on the primary refractory mortar, stirring, adjusting to be in a block-free thick paste state, and standing for at least 2 hours to obtain the modified water glass refractory mortar for the refractory cable.
The beneficial effects of the invention are as follows: the special fire clay for preparing the cable uses the phosphogypsum and the nano material which are solid wastes as inorganic fireproof agents by utilizing the characteristics that the phosphogypsum is rich in moisture and is easy to form dihydrate phosphogypsum to store the moisture. The invention prepares a novel fire clay, and inorganic fireproof agent and humectant are added, so that the fire clay has better fire resistance. The lubricant and the curing agent are added, so that the fire clay has better adhesiveness, can be easily adhered to the cable copper wire, and has higher strength. In the preparation process of the fire clay, ultrasonic waves are used, so that the performance of the water glass is improved, the aged water glass is enabled to recover activity, homogenization of various substances can be promoted, and the service performance of the fire clay is greatly improved.
Further, the inorganic fireproof agent in the step S1 is any one of phosphogypsum powder and dried printing and dyeing sludge powder or a mixture thereof.
The beneficial effects of adopting the further scheme are as follows: the invention aims at the characteristic that the dried printing and dyeing sludge powder and phosphogypsum powder generate water after being heated, can better prevent further combustion, and is a good flame retardant. Phosphogypsum powder contains 2 crystal waters, and at the temperature below 50 ℃, phosphogypsum mainly loses its physical adsorption water; when the temperature is higher than 50 ℃, the phosphogypsum gradually removes the crystal water to form semi-hydrated gypsum. The dried printing and dyeing sludge powder is rich in a large amount of capillary bound water, surface adsorbed water, internal bound water and gelled substances, can prevent further combustion, and is a good flame retardant.
Further, the humectant in the step S1 is any one or a mixture of more than one of sorbitol, tetraethoxysilane and titanate coupling agent.
The beneficial effects of adopting the further scheme are as follows: sorbitol, tetraethoxysilane and titanate coupling agent all have good moisturizing and sliding effects, and the titanate coupling agent has certain adhesive property and certain curing effect on fire clay.
Further, the lubricant in the step S1 is calcium stearate.
The beneficial effects of adopting the further scheme are as follows: the calcium stearate has good lubricating effect, and certain lubricant is added, so that the fluidity and the ductility of the fire clay can be improved, and the fire clay can be better attached to the cable copper wire.
Further, the curing agent in the step S1 is any one or a mixture of a plurality of low-modulus liquid water glass and instant water glass with the water content of 10 percent.
The beneficial effects of adopting the further scheme are as follows: the liquid water glass and the instant water glass with the water content of 10% have certain curing effect, and the curing agent is added to enable the fire clay to be better shaped, so that the fire clay has certain bonding degree and strength, better wraps the cable copper wire, is firmly attached to the copper wire guide wire at high temperature, and has good fire resistance.
Further, the solid powder filler in the step S1 is a construction waste nanocrystal core.
The beneficial effects of adopting the further scheme are as follows: the construction waste nanocrystal core has certain fire resistance, is low in price, and can also increase the curing effect of the fire clay.
Further, the power of the ultrasonic treatment in the step S2 is 40KHz, and the time of the ultrasonic treatment is 20min.
The beneficial effects of adopting the further scheme are as follows: the performance of the water glass is improved, the aged water glass is enabled to recover activity, homogenization of various substances is promoted, and the service performance of the refractory mortar is greatly improved.
Further, the stirring time in the step S2 is 15min, and the standing time is 2h.
The beneficial effects of adopting the further scheme are as follows: the components of the refractory clay are uniform and finer, and the standing time ensures that the curing effect of the refractory clay is better.
The modified water glass fire clay for the fire-resistant cable is prepared by the method.
Detailed Description
The principles and features of the present invention are described below with examples given for the purpose of illustration only and are not intended to limit the scope of the invention.
The water glass is colorless, odorless and nontoxic, and is easy to manufacture, low in cost and good in flame retardant property. Phosphogypsum powder, dried printing and dyeing sludge powder, sorbitol, tetraethoxysilane and titanate coupling agent are all good flame retardants. The fire clay consists of green environment-friendly materials, and has good fire resistance, no toxicity and low cost.
The invention discloses a preparation method of modified water glass fire clay for a fire-resistant cable, which comprises the following steps:
s1, adding 60-65 parts by weight of an inorganic fireproof agent, 0.1-1 part by weight of a humectant, 5-10 parts by weight of a lubricant, 1 part by weight of a curing agent and 0.01 part by weight of a solid powder filler into 20 parts by weight of medium-modulus liquid sodium silicate;
step S2, uniformly mixing the inorganic fireproof agent, the humectant, the lubricant, the curing agent and the solid powder filler in the step S1;
s3, performing ultrasonic treatment on the refractory mortar mixed in the step S2, wherein the running power of ultrasonic waves is 40KHz, and the time for performing ultrasonic waves is 20min;
and S4, stirring the refractory clay subjected to ultrasonic treatment in the step S3 for 15min, preparing into a thick paste without blocks, and standing for 2h.
The inorganic fireproof agent in the step S1 is any one or a mixture of a plurality of phosphogypsum powder and dried printing and dyeing sludge powder.
The humectant in the step S1 is any one or a mixture of more of sorbitol, ethyl orthosilicate and titanate coupling agent.
The lubricant of step S1 is calcium stearate.
The curing agent in the step S1 is any one or a mixture of liquid water glass and instant water glass with the water content of 10 percent.
The solid powder filling agent in the step S1 is construction waste nanocrystal core.
The invention uses an ultrasonic instrument of KQ2200E model, and the running power is 40KHz.
The novel fire clay is better in fireproof performance, lower in price, nontoxic and environment-friendly aiming at the traditional fire clay.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The preparation method of the modified water glass fire clay for the fire-resistant cable is characterized by comprising the following steps of:
step S1, adding 60-65 parts by weight of inorganic fireproof agent, 0.1-1 part by weight of humectant, 1-5 parts by weight of lubricant, 1 part by weight of curing agent and 0.01 part by weight of solid powder filler into 20 parts by weight of medium-modulus liquid water glass, and uniformly mixing to obtain primary refractory clay; the inorganic fireproof agent is a mixture of any one or more of dried printing sludge powder and phosphogypsum powder; the solid powder filling agent in the step S1 is construction waste nanocrystal cores;
and S2, carrying out ultrasonic treatment on the primary refractory mortar, stirring, adjusting to be in a block-free thick paste state, and standing for at least 2 hours to obtain the modified water glass refractory mortar for the refractory cable.
2. The method for preparing the modified water glass fire clay for fire cables according to claim 1, wherein the humectant in the step S1 is a mixture of any one or more of sorbitol, ethyl orthosilicate and titanate coupling agent.
3. The method for preparing a modified water glass refractory mortar for a refractory cable according to claim 1, wherein the lubricant in the step S1 is calcium stearate.
4. The method for preparing modified water glass fire clay for fire-resistant cable according to claim 1, wherein the curing agent in the step S1 is a mixture of any one or more of low-modulus liquid water glass and instant water glass with water content of 10%.
5. The method for preparing a modified water glass refractory mortar for a refractory cable according to claim 1, wherein the power of the ultrasonic wave in the step S2 is 40KHz and the time for performing the ultrasonic wave is 20min.
6. The method for producing a modified water glass refractory mortar for a refractory cable according to claim 1, wherein the stirring time in the step S2 is 15min and the standing time is 2h.
7. A modified water glass fire clay for fire-resistant cables, characterized in that it is prepared by the method according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210542286.0A CN114956766B (en) | 2022-05-17 | 2022-05-17 | Modified water glass fire clay for fire-resistant cable and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210542286.0A CN114956766B (en) | 2022-05-17 | 2022-05-17 | Modified water glass fire clay for fire-resistant cable and preparation method thereof |
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| Publication Number | Publication Date |
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| CN114956766A CN114956766A (en) | 2022-08-30 |
| CN114956766B true CN114956766B (en) | 2023-07-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2957606A1 (en) * | 2014-06-18 | 2015-12-23 | HILTI Aktiengesellschaft | Fire-resistant compound and its utilisation |
| CN107986758B (en) * | 2017-12-27 | 2020-07-28 | 杨松 | Special high-alumina ball for preparing kaolin roasting activation rotary furnace |
| CN109704715A (en) * | 2019-01-23 | 2019-05-03 | 昆明理工大学 | A kind of method that red mud cooperates with stable curing with ardealite |
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