CN114315304B - Heavy non-sintered ceramsite and preparation process thereof - Google Patents
Heavy non-sintered ceramsite and preparation process thereof Download PDFInfo
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- CN114315304B CN114315304B CN202111614195.5A CN202111614195A CN114315304B CN 114315304 B CN114315304 B CN 114315304B CN 202111614195 A CN202111614195 A CN 202111614195A CN 114315304 B CN114315304 B CN 114315304B
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention provides heavy non-fired ceramsite and a preparation process thereof, wherein the bulk density of the heavy non-fired ceramsite is more than 1400kg/m 3 Apparent density of over 2600kg/m 3 The water absorption rate is lower than 4%, and the water absorption rate is prepared from the following components in parts by weight: 100 parts of powder, 15-25 parts of cement, 10-15 parts of water glass, 1.5-2.5 parts of water reducing agent, 0.5-1 part of calcium chloride and 25-35 parts of water; wherein the powder comprises one or more of casting shot blasting ash, steel slag powder and metal tailing powder. The invention takes one or more of casting shot blasting ash, steel slag powder and metal tailing powder as main raw materials, not only can stably, durably and harmlessly treat solid wastes such as casting shot blasting ash, steel slag powder and metal tailing powder, but also can effectively solve the problem that the solid wastes are difficult to treat, and the prepared heavy non-fired ceramsite has high strength, large stacking density and low water absorption, can be applied to places such as concrete, wall materials and cement prefabricated parts, does not need high-temperature sintering in the preparation process, and can realize large-scale industrial production.
Description
Technical Field
The invention relates to the technical field of ceramsite preparation, and particularly relates to heavy non-fired ceramsite and a preparation process thereof.
Background
As a light aggregate for buildings, the ceramsite is greatly favored by people due to the characteristics of light weight, heat preservation, environmental protection and the like, and can replace the broken stone to produce light wall materials such as ceramsite concrete, ceramsite building blocks, ceramsite wallboards and the like or be used as roadbed materials.
However, in the prior art, most of the ceramsite is made of clay or other materials through high-temperature sintering by a roasting process, a large amount of clay resources are consumed, a large amount of energy resources such as coal, gas and electric power are also consumed, the generated waste gas emission can cause environmental pollution, and the cost is very high. Moreover, after the ceramsite is directly applied to the common commercial concrete, the phenomenon of floating of the ceramsite can occur, and the development and use of ceramsite products are greatly limited. Therefore, the development of a technology for preparing heavy ceramsite by using a new raw material is urgently needed.
Disclosure of Invention
Based on the above, it is necessary to provide a heavy non-fired ceramsite and a preparation process thereof, wherein one or more of casting shot blasting ash, steel slag powder and metal tailing powder are used as main raw materials, so that solid wastes such as casting shot blasting ash, steel slag powder and metal tailing powder can be stably, durably and harmlessly treated, the problem that the solid wastes are difficult to treat can be effectively solved, the prepared heavy non-fired ceramsite is high in strength, large in stacking density, excellent in waterproof performance, free of high-temperature sintering, and capable of realizing large-scale industrial production.
It is worth to say that in the process of Chinese industrialization, the casting industry is developed vigorously. During the casting production process, a great deal of shot blasting ash, steel slag and other particles containing high-density metal powder are generated. The high-density metal powder particles are strictly forbidden to be discharged at the present stage according to the environmental protection requirement, otherwise, the high-density metal powder particles can cause serious pollution to the surrounding environment. Random stacking results in large floor yard areas being occupied and also contaminates surrounding side water and soil. Materials such as casting shot blasting ash, steel slag and the like lack an effective and environment-friendly disposal mode.
The invention adopts the following technical scheme:
heavy non-sintered ceramsite with bulk density of more than 1400kg/m 3 Apparent density is more than 2600kg/m 3 The water absorption rate is lower than 4%, and the water absorption rate is prepared from the following components in parts by weight: 100 parts of powder, 15-25 parts of cement, 10-15 parts of water glass, 1.5-2.5 parts of water reducing agent, 0.5-1 part of calcium chloride and 25-35 parts of water; wherein the powder comprises one or more of casting shot blasting ash, steel slag powder and metal tailing powder.
According to the invention, one or more of casting shot blasting ash, steel slag powder and metal tailing powder is used as a main raw material, so that solid wastes such as casting shot blasting ash, steel slag powder and metal tailing powder can be stably, durably and harmlessly treated, the problem that the solid wastes are difficult to treat can be effectively solved, and components such as silicon dioxide and silicate in the powder can be mixed with the components such as silicon dioxide and silicate in the powderThe cement is subjected to a hardening reaction, and high-density metal particle components such as iron, titanium, nickel, copper and the like can be solidified in the ceramsite after the hardening is finished, and the high-density metal particles exist in a stable state complex form, so that the leaching of the metal components in the ceramsite is effectively controlled. The existence of the high-density metal particle materials increases the real density and the bulk density of the ceramsite and reduces the porosity of the ceramsite. The bulk density of the heavy non-sintered ceramsite provided by the invention is far greater than that of the conventional light ceramsite, and can reach 2500kg/m 3 And the bulk density of the natural stones is 2400kg/m 3 The two are basically equivalent. The heavy non-sintered ceramsite provided by the invention has the water absorption rate of less than 1 percent and the water absorption rate of natural stones of about 3 percent, has better performance, and can be directly applied to concrete products instead of the stones. The cement accounts for 15-25% of the powder, which not only ensures the adhesion of the materials, but also has higher strength, easy granulation and balling and lower production cost.
The water glass can permeate into a gap structure generated in the preparation process of the ceramsite in the cement curing process, so that the weight increasing effect of the ceramsite can be realized while the gap structure of the ceramsite is filled, and the water absorption rate of the ceramsite in use is reduced. The hardness of the ceramsite can be obviously improved after the cement is hardened and solidified, and the ceramsite can be provided with certain toughness by adding the water glass. Under the dual action of cement and water glass, the crushing resistance of the ceramsite is obviously improved.
The solubility of the mineral components in the cement can be increased through the calcium chloride, and the hydration speed of the mineral components in the cement is accelerated. The calcium chloride and the aluminum oxide in the cement generate hydrated calcium chloroaluminate which is insoluble in water, and simultaneously, the calcium chloride can enable calcium hydroxide in the cement paste to generate solid phase precipitation. The precipitation of solid phases of hydrated calcium chloroaluminate and calcium hydroxide accelerates the structure formation of cement paste, and contributes to the development of early strength of cement mixtures. The calcium chloride is added to ensure that the ceramsite has certain initial strength in the production and preparation process, the crushing rate of the ceramsite is reduced in the later discharging and stacking process, and the industrial mass production is favorably realized.
The water reducing agent is adsorbed on the surface of cement particles, so that the particles show electrical property, and the particles repel each other due to the same charges, so that the cement particles are dispersed to release the excessive water among the particles, thereby generating the water reducing effect. Meanwhile, due to the addition of the water reducing agent, an adsorption film is formed on the surface of cement particles, the hydration speed of cement is influenced, the growth of a cement stone crystal is more complete, capillary gaps which are easy to cause water evaporation are reduced, the network structure of the cement stone crystal is more compact, the hardness and the structure compactness of a cement mixture are improved, and the compactness of the baking-free heavy ceramsite is further improved. The water reducing agent can be any one of sodium lignosulfonate water reducing agent, naphthalene high-efficiency water reducing agent, aliphatic high-efficiency water reducing agent, amino high-efficiency water reducing agent and polycarboxylic acid high-efficiency water reducing agent.
The bulk density of the heavy non-sintered ceramsite provided by the invention is more than 1400kg/m 3 Apparent density of over 2600kg/m 3 The water absorption rate is lower than 4%, and the water-absorbing coating can directly replace small-particle stones such as melon seed slices and the like to be applied to concrete. When the ceramsite is applied to concrete instead of gravel, the water content of the ceramsite is increased without spraying water and wetting in advance, and abnormal conditions that the hydration degree of cement is not enough, the strength of concrete does not reach the standard and the like caused by absorbing water in a mixture in the subsequent mixing process can be effectively avoided. The ceramsite has a heavy bulk density, does not float after being mixed with materials, ensures the surface finishing effect of the subsequent concrete after solidification, and ensures the strength uniformity of the concrete. The ceramsite is round, and when the ceramsite is applied to concrete, stress concentration caused by concentration of sharp corners of stones can be avoided, so that the strength of the concrete can be greatly improved. Meanwhile, the heavy non-sintered ceramsite provided by the invention has the characteristics of low water absorption, high strength and high density, can directly replace small-particle stones such as melon seed pieces and the like to be applied to concrete materials, specifically comprises commercial concrete, prefabricated members, cement stabilized base material, permeable concrete pavement and the like, and further expands the application range of the ceramsite.
In the technical scheme, the particle size of the powder is 1000-3000 meshes.
The particle size of the powder is designed to be 1000-3000 meshes, so that the powder can be conveniently and fully mixed with other components such as cement and the like and can react with each other, and the hardening reaction can be better generated with the cement, so that the high-density metal particle components are more uniformly solidified in the ceramsite. One or more of casting shot blasting ash, steel slag powder and metal tailing powder is ground to prepare 1000-3000-mesh powder.
The invention also provides the following technical scheme:
a preparation process of heavy non-sintered ceramsite comprises the following steps: stirring and mixing the powder and the cement to obtain a solid powder mixture; stirring and mixing water glass, a water reducing agent, calcium chloride and a proper amount of clear water to obtain a liquid mixture; stirring and mixing the solid powder mixture and the liquid mixture to obtain a solid-liquid mixture; adding the solid-liquid mixture into a granulation disc for granulation, and adding a proper amount of clear water in an atomization mode for multiple times in the granulation process to prepare semi-finished ceramsite; and transferring the semi-finished ceramsite to a vacant flat land area for curing to obtain the heavy non-fired ceramsite.
The solid powder mixture and the liquid mixture are respectively stirred, mixed and prepared, and then stirred and mixed, so that the phenomenon of uneven mixing of the solid and the liquid materials is avoided to a certain extent, the synergistic effect of the components can be fully exerted, and the production quality of the ceramsite is ensured. The solid-liquid mixture is added into the granulating tray for granulation, then stacking and maintenance are carried out, high-temperature sintering is not needed, large-scale industrial production can be realized, the preparation process is simple, the prepared baking-free heavy ceramsite has extremely high cylinder pressure strength, low water absorption and density equivalent to natural stones, the surface of the ceramsite is more compact compared with the traditional light ceramsite, the technical index requirements of concrete construction can be completely met, and the cost of concrete construction can be reduced.
Preferably, in the above technical scheme, when the semi-finished ceramsite is prepared, the inclination angle of the granulating disk is controlled to be 30-45 degrees, the rotation frequency of the motor of the granulating disk is controlled to be 40-50 HZ, and the particle size of the semi-finished ceramsite is controlled to be 5-20 mm.
The invention ensures the grain diameter of the semi-finished ceramsite by strictly controlling the inclination angle of the granulating disc and the rotation frequency of the motor of the granulating disc, so that the grain diameter of the semi-finished ceramsite is controlled to be 5-20 mm, and the requirements of application in concrete materials can be met.
Further, in the technical scheme, in the process of adding a proper amount of clear water in an atomized form for multiple times, the interval time of water addition is controlled to be 5min, and the duration time of each water addition is controlled to be 2min-3min.
The proper water content of the semi-finished ceramsite is ensured by controlling the water adding interval time in the preparation process of the semi-finished ceramsite and the duration time of each water adding, and the structure and shape uniformity of the semi-finished ceramsite are favorably controlled.
Specifically, in the above technical scheme, the transferring of the semi-finished ceramsite to an open flat land area for curing to obtain the heavy non-fired ceramsite specifically comprises the following steps: transferring the semi-finished ceramsite to a vacant flat land area for accumulation; spraying atomized water to the semi-finished ceramsite pile layer once every 24 hours to keep the surface of the ceramsite moist and saturated, covering a plastic film on the surface of the ceramsite after the atomized water is sprayed, and performing the operation for 7 days; and (4) collecting and storing the ceramsite in a storage bin, and storing for 28 days to obtain the finished product of the heavy non-fired ceramsite.
The method comprises the steps of spraying atomized water at intervals, keeping the surface of the ceramsite moist and saturated, covering a plastic film on the surface of the ceramsite after the atomized water is sprayed, ensuring proper hydration of cement, and the synergistic action and reaction of components in the ceramsite, ensuring the structure and performance of the ceramsite, collecting and storing the ceramsite in a storage bin, and storing for 28 days to obtain the finished product heavy non-fired ceramsite. The finished heavy non-fired ceramsite has the characteristics of stable structure and performance, low water absorption, high strength and high density.
It is worth mentioning that the ceramsite needs to be stored in a dry, ventilated and damp-proof position, so that the influence of moisture absorption on later-stage mixing is avoided.
It should be noted that the temperature and humidity of the ceramsite need to be effectively monitored in the curing process, and the temperature is ensured to be 25-50 ℃, and the relative humidity is 50-70%.
Further, in the technical scheme, the thickness of the stacked layer of the semi-finished ceramsite is controlled to be 50-80 cm.
By controlling the thickness of the stacking layer to be 50cm-80cm, the proper hydration process of cement is guaranteed, poor cement hydration and low ceramsite strength caused by too thin stacking thickness and fast heat dissipation are avoided, the phenomenon that the ceramsite hydration is advanced caused by temperature concentration caused by too thick stacking thickness and slow heat dissipation is avoided, and the phenomena of too concentrated internal stress of the ceramsite, cracking of the ceramsite and the like are reduced.
In the specific embodiment of the invention, when the solid powder mixture is prepared, the rotating speed of the stirrer is controlled to be 150-200R/min, and the stirring time is controlled to be 30-60S.
In a preferred embodiment of the invention, the rotation speed of the stirrer is controlled to be 50R/min-100R/min and the stirring time is controlled to be 45S-65S when preparing the liquid mixture.
In a preferred embodiment of the invention, when preparing the solid-liquid mixture, the mixing time is controlled to be 200S-300S, and the rotation speed of the stirrer is controlled to be 500R/min-1000R/min.
According to the invention, the solid powder mixture and the liquid mixture are respectively mixed and then intensively stirred and mixed, and a proper stirring speed and time are designed in each mixing stage, so that the energy is saved while the uniform mixing is ensured, and the stirring and mixing efficiency is higher.
The solid powder mixture was obtained by stirring and mixing in a horizontal stirrer. The liquid mixture is obtained by stirring and mixing in a cement mortar stirrer. And stirring and mixing the solid powder mixture and the liquid mixture in a high-speed stirring device.
Compared with the prior art, the invention has the beneficial effects that:
(1) The heavy non-fired ceramsite provided by the invention takes one or more of casting shot blasting ash, steel slag powder and metal tailing powder as main raw materials, not only can stably, durably and harmlessly treat solid wastes such as casting shot blasting ash, steel slag powder and metal tailing powder, but also can effectively solve the problem that the solid wastes are difficult to treat, change wastes into valuables, realize a recycling type economic mode of waste recycling, promote economic development, and the heavy non-fired ceramsite has high strength, large stacking density and low water absorption rate, can be applied to places such as concrete, wall materials, cement prefabricated members and the like, not only obtains good economic benefits, but also can avoid pollution to the environment.
(2) The preparation process of the heavy non-fired ceramsite is simple and easy to implement, has extremely low production cost, does not need large-scale calcining equipment for sintering, has low energy consumption, meets the basic national policy of energy conservation, low carbon and environmental protection, and can be applied to large-scale industrial production.
(3) The heavy non-sintered ceramsite prepared by the preparation process of the heavy non-sintered ceramsite has the advantages of high cylinder compression strength, low water absorption, density equivalent to that of natural stones, more compact surface compared with the traditional light ceramsite, capability of completely meeting the technical index requirements of concrete construction, no need of spraying water for wetting in advance during use, simple use process, low cost and contribution to reducing the construction cost of concrete.
Detailed Description
The present invention is further described in detail below with reference to specific examples so that those skilled in the art can more clearly understand the present invention.
The following examples are provided only for illustrating the present invention and are not intended to limit the scope of the present invention. All other embodiments obtained by a person skilled in the art based on the specific embodiments of the present invention without any creative work belong to the protection scope of the present invention.
In the examples of the present invention, all the raw material components are commercially available products well known to those skilled in the art, unless otherwise specified; in the examples of the present invention, unless otherwise specified, all technical means used are conventional means well known to those skilled in the art.
In the examples of the present invention, the raw materials used were all conventional commercially available products.
Casting shot blasting ash: in the casting production process, when the surface of a casting blank has sand sticking or insufficient smoothness, a steel shot moving at high speed is adopted to impact the surface of the casting, and the sand sticking or the rough area of the surface of the casting is polished to be smooth. The steel shots with complete volume or slight abrasion are screened and filtered for continuous recycling. And the rest crushed steel shot powder, fine sand powder and metal powder are induced by air to remove dust and gather to form casting shot blasting ash.
The main components of the casting shot blasting ash are as follows: 60% of iron, 5% of graphite, 20% of silicon powder, 5% of titanium, nickel and the like, and the balance 10%.
Steel slag powder: steel slag is a by-product of the steel-making process. It is composed of various oxides formed by oxidizing impurities in pig iron, such as silicon, manganese, phosphorus, sulfur, etc. in the smelting process, and salts generated by the reaction of these oxides and solvent. The powder generated by ball milling and crushing the products is the steel slag powder.
The steel slag powder mainly comprises the following components: 70% of iron, 5% of aluminum oxide, 5% of silicon powder, 10% of titanium, nickel and the like, and the rest 10%.
Metal tailing powder: under specific economic and technical conditions, an ore dressing plant grinds ores, and wastes discharged after useful components are selected are metal tailing powder.
The main components of the metal tailing powder are as follows: 70% of ferrous sulfide, 10% of sodium silicate and 20% of impurity metal (copper, nickel and titanium) powder.
Example 1
The formula of the heavy non-sintered ceramsite disclosed by the embodiment of the invention comprises the following components: 100kg of powder (30 kg of casting shot blasting ash, 30kg of steel slag powder and 40kg of metal tailing powder with the particle size of 1000-3000 meshes), 15kg of cement, 10kg of water glass, 1.5kg of TD-JSS2 polycarboxylate superplasticizer, 0.5kg of calcium chloride and 25kg of water. .
The preparation process of the heavy non-sintered ceramsite disclosed by the embodiment of the invention adopts the formula, and comprises the following steps of:
s11, stirring and mixing the powder and the cement in a horizontal stirrer at the rotating speed of 150-200R/min for 30-60S to obtain a solid powder mixture.
S12, stirring, mixing and stirring the water glass, the water reducing agent, the calcium chloride and 15kg of clear water in a cement mortar stirrer at the rotating speed of 50-100R/min for 45-65S to obtain a liquid mixture.
And S13, stirring and mixing the solid powder mixture and the liquid mixture in high-speed stirring equipment, wherein the rotating speed of a stirrer is 500-1000R/min, and the stirring time is 200-300S, so as to obtain a solid-liquid mixture.
S14, adding the solid-liquid mixture into a granulation disc for granulation, controlling the inclination angle of the granulation disc to be 30-45 degrees, controlling the rotation frequency of a motor of the granulation disc to be 40-50 HZ, controlling the particle size of the semi-finished ceramsite to be 5-20 mm, adding 10kg of clear water in an atomization mode for three times in the granulation process, controlling the interval time of water addition to be 5min, and controlling the duration time of water addition for each time to be 2-3 min, thereby preparing the semi-finished ceramsite.
S15, transferring the semi-finished ceramsite to a hollow flat land area, and controlling the thickness of a stacking layer to be 50cm.
S16, spraying atomized water to the semi-finished ceramsite pile layer every 24 hours to keep the surface of the ceramsite wet and saturated, covering a plastic film on the surface of the ceramsite after the atomized water is sprayed, and carrying out the operation for 7 days.
S17, collecting and storing the ceramsite in a storage bin, and storing for 28 days to obtain the finished product of the heavy non-fired ceramsite.
Example 2
The difference from the embodiment 1 is that the formulation of the heavy non-fired ceramsite of the embodiment of the invention is as follows: 100kg of powder (the particle size is 1000-3000 meshes, 30kg of casting shot blasting ash, 30kg of steel slag powder and 40kg of metal tailing powder), 25kg of cement, 15kg of water glass, 2.5kg of TD-JSS2 polycarboxylic acid water reducing agent, 1kg of calcium chloride and 35kg of water.
In the preparation process of the heavy non-sintered ceramsite of the embodiment of the invention, 20kg of clear water is added into the liquid mixture prepared in the step S12; and S14, adding 15kg of clear water when preparing the semi-finished ceramsite.
Example 3
The difference from the embodiment 1 is that the formulation of the heavy non-fired ceramsite of the embodiment of the invention is as follows: 100kg of powder (the grain diameter is 1000-3000 meshes, 30kg of casting shot blasting ash, 30kg of steel slag powder and 40kg of metal tailing powder), 20kg of cement, 12kg of water glass, 2.0kg of TD-JSS2 polycarboxylate superplasticizer, 0.8kg of calcium chloride and 30kg of water.
In the preparation process of the heavy non-sintered ceramsite of the embodiment of the invention, 18kg of clear water is added into the liquid mixture prepared in the step S12; and S14, when preparing the semi-finished ceramsite, adding 12kg of clear water.
Example 4
The difference from example 3 is that in step S15, the stack thickness is controlled to 60cm.
Example 5
The difference from example 3 is that in step S15, the thickness of the stack was controlled to 80cm.
Comparative example 1
The difference from the example 3 is that the formulation of the ceramsite is as follows: 100kg of sludge (replacing powder), 20kg of cement, 12kg of water glass, 2.0kg of TD-JSS2 polycarboxylic acid water reducing agent, 0.8kg of calcium chloride and 30kg of water.
Comparative example 2
The difference from the example 4 is that the formulation of the ceramsite is as follows: 100kg of powder (30 kg of casting shot blasting ash, 30kg of steel slag powder and 40kg of metal tailing powder with the particle size of 1000-3000 meshes), 20kg of cement, 2.0kg of TD-JSS2 polycarboxylic acid water reducing agent, 0.8kg of calcium chloride and 30kg of water.
The performance of the ceramsite prepared in the examples 1-5 and the comparative examples 1-2 is tested, and the test results are shown in the following table 1:
TABLE 1
Analysis of Table 1 shows that the bulk density of the ceramsite prepared in examples 1 to 5 is more than 1400kg/m 3 Apparent density of over 2600kg/m 3 The water absorption rate is lower than 4%, the performance is equivalent to that of natural stones, and the stone can directly replace small-particle stones such as melon seed slices and the like to be applied to concrete. The bulk density of the ceramsite prepared in examples 1 to 5 is 1.4g/cm 3 -1.6g/cm 3 The apparent density is 2.6g/cm 3 -2.8g/cm 3 The porosity is 30-45%, the acid solubility and the alkali solubility are both less than or equal to 0.3%, the cylinder pressure is 13-15 MPa, the crushing value is 10-15%, and the water absorption is less than 4%, so that the use requirements of concrete and the like can be met, the ceramsite has a heavy bulk density, cannot float after being mixed, the surface light receiving effect of subsequent concrete after solidification is guaranteed, and the strength uniformity of the concrete is guaranteed. In comparative example 1, the sludge was usedThe prepared ceramsite is a light ceramsite, has low bulk density and apparent density, and is difficult to apply to concrete. In comparative example 2, water glass is omitted, and the bulk density, apparent density, water absorption and the like of the prepared ceramsite are difficult to meet the application requirements of concrete.
The heavy non-sintered ceramsite prepared in the embodiments 1 to 5 has the characteristics of low water absorption, high strength and high density, can be directly applied to concrete materials instead of small particle stones such as melon seed pieces, and specifically comprises commercial concrete, prefabricated members, water-stable base materials, permeable concrete pavements and the like, and further expands the application range of the ceramsite.
It should be noted that the above examples are only for further illustration and description of the technical solution of the present invention, and are not intended to further limit the technical solution of the present invention, and the method of the present invention is only a preferred embodiment and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. Heavy non-sintered ceramsite is characterized by having a bulk density of more than 1400kg/m 3 Apparent density of over 2600kg/m 3 The water absorption rate is lower than 4%, the cylinder pressure is 13MPa-15MPa, the void ratio is 30% -45%, and both the acid dissolution rate and the alkali dissolution rate are less than or equal to 0.3%, and the water absorption rate is prepared from the following components in parts by weight: 100 parts of powder, 15-25 parts of cement, 10-15 parts of water glass, 1.5-2.5 parts of water reducing agent, 0.5-1 part of calcium chloride and 25-35 parts of water;
the powder material comprises casting shot blasting ash, steel slag powder and metal tailing powder according to a mass ratio of 3:3:4, mixing;
the particle size of the powder is 1000-3000 meshes.
2. The preparation process of the heavy non-fired ceramsite as recited in claim 1, comprising the following steps:
stirring and mixing the powder and the cement to obtain a solid powder mixture;
stirring and mixing water glass, a water reducing agent, calcium chloride and a proper amount of clear water to obtain a liquid mixture;
stirring and mixing the solid powder mixture and the liquid mixture to obtain a solid-liquid mixture;
adding the solid-liquid mixture into a granulating disc for granulation, and adding a proper amount of clear water in an atomizing form for multiple times in the granulating process to prepare a semi-finished ceramsite;
and transferring the semi-finished ceramsite to an open flat land area for curing to obtain the heavy unfired ceramsite.
3. The process for preparing heavy non-sintered ceramsite according to claim 2, wherein the inclination angle of the granulating disk is controlled to be 30-45 degrees, the rotation frequency of the motor of the granulating disk is controlled to be 40-50 Hz, and the particle size of the semi-finished ceramsite is controlled to be 5-20 mm.
4. The process for preparing heavy non-sintered ceramsite according to claim 3, wherein in the process of preparing semi-finished ceramsite, a proper amount of clear water is added in an atomized form for multiple times, the interval time of adding water is controlled to be 5min, and the duration time of adding water for each time is 2min-3min.
5. The preparation process of the heavy non-sintered ceramsite according to claim 2, wherein the semi-finished ceramsite is transferred to an open flat area for curing to obtain the heavy non-sintered ceramsite, and the preparation process specifically comprises the following steps:
transferring the semi-finished ceramsite to a vacant flat land area for accumulation;
spraying atomized water to the semi-finished ceramsite pile layer once every 24 hours to keep the surface of the ceramsite moist and saturated, covering a plastic film on the surface of the ceramsite after the atomized water is sprayed, and performing the operation for 7 days;
and (4) collecting and storing the ceramsite in a storage bin, and storing for 28 days to obtain the finished product of the heavy non-fired ceramsite.
6. The process for preparing heavy non-sintered ceramsite according to claim 5, wherein the thickness of the stacked layer of the semi-finished ceramsite is controlled to be 50-80 cm.
7. The process for preparing heavy non-sintered ceramsite according to any one of claims 2 to 6, wherein the rotation speed of a stirrer is controlled to be 150r/min-200r/min, and the stirring time is controlled to be 30s-60s when the solid powder mixture is prepared.
8. The process for preparing heavy non-sintered ceramsite according to any one of claims 2 to 6, wherein the rotation speed of a stirrer is controlled to be 50r/min-100r/min and the stirring time is controlled to be 45s-65s when the liquid mixture is prepared.
9. The process for preparing heavy non-sintered ceramsite according to any one of claims 2 to 6, wherein the mixing time is controlled to be 200-300 s and the rotating speed of the stirrer is controlled to be 500-1000 r/min when the solid-liquid mixture is prepared.
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| CN114751684A (en) * | 2022-05-10 | 2022-07-15 | 合肥仁创铸造材料有限公司 | Baking-free iron tailing ceramsite and pervious concrete and preparation method thereof |
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| CN106587765A (en) * | 2016-12-02 | 2017-04-26 | 北京仁创砂业科技有限公司 | Method for preparing ceramsites and ceramsites prepared by method |
| CN109265102A (en) * | 2018-09-30 | 2019-01-25 | 合肥仁创铸造材料有限公司 | A kind of casting dedusting ash method for innocent treatment |
| CN111362608A (en) * | 2020-03-18 | 2020-07-03 | 北京市燕通建筑构件有限公司 | Solid waste non-sintered ceramsite and preparation method thereof, foam concrete and light partition board |
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| JPH06271351A (en) * | 1993-01-25 | 1994-09-27 | Eguchi Koichiro | Production of pottery and cement product |
| CN106587765A (en) * | 2016-12-02 | 2017-04-26 | 北京仁创砂业科技有限公司 | Method for preparing ceramsites and ceramsites prepared by method |
| CN109265102A (en) * | 2018-09-30 | 2019-01-25 | 合肥仁创铸造材料有限公司 | A kind of casting dedusting ash method for innocent treatment |
| CN111362608A (en) * | 2020-03-18 | 2020-07-03 | 北京市燕通建筑构件有限公司 | Solid waste non-sintered ceramsite and preparation method thereof, foam concrete and light partition board |
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