CN114890749B - Electrolytic manganese slag and waste clay brick double-doped baking-free brick and preparation method thereof - Google Patents

Electrolytic manganese slag and waste clay brick double-doped baking-free brick and preparation method thereof Download PDF

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CN114890749B
CN114890749B CN202210588477.0A CN202210588477A CN114890749B CN 114890749 B CN114890749 B CN 114890749B CN 202210588477 A CN202210588477 A CN 202210588477A CN 114890749 B CN114890749 B CN 114890749B
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brick
electrolytic manganese
baking
manganese slag
clay
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CN114890749A (en
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陈跃辉
郭银杰
刘云
游志敏
郭婧
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Xiangtan University
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/16—Waste materials; Refuse from building or ceramic industry
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a baking-free brick with double doping of electrolytic manganese slag and waste clay bricks and a preparation method thereof. The baking-free brick utilizes the synergistic effect between the electrolytic manganese slag and the waste sintered clay brick, greatly improves the mechanical property of the brick body, and effectively fixes heavy metal ions in the electrolytic manganese slag. The preparation method of the baking-free brick provided by the invention comprises the steps of uniformly mixing electrolytic manganese slag, cement, waste sintered clay brick and clay ceramsite according to a set mass ratio, adding a curing agent and water, fully stirring to prepare a baking-free brick slurry, and forming and curing the baking-free brick slurry to obtain the baking-free brick. The preparation method has the advantages of simplicity, easiness in operation, convenience in operation, environmental friendliness and the like, and is suitable for large-scale continuous industrial production.

Description

Electrolytic manganese slag and waste clay brick double-doped baking-free brick and preparation method thereof
Technical Field
The invention relates to a baking-free brick and a preparation method thereof, in particular to a baking-free brick with double doping of electrolytic manganese slag and waste clay brick and a preparation method thereof, belonging to the technical field of building materials
Background
The method is solved from the prediction report of the operation dynamics and the investment trend of the electrolytic manganese industry in China, the output of electrolytic manganese slag in China is 150.13 ten thousand tons in 2020, and the electrolytic manganese slag accounts for 97 percent of the total production energy of the whole world. The electrolytic manganese slag in China is mainly distributed in Hunan, chongqing, hubei, shaanxi, guizhou, sichuan, yunnan, guangxi and other places. Wherein 4 of Hunan, chongqing, guizhou and Sichuan saves the yield of electrolytic manganese slag and accounts for more than 90 percent of the total production energy of the electrolytic manganese slag in China.
The electrolytic manganese slag is solid waste slag generated in the process of electrolyzing metal manganese, a by-product of the reaction of manganese ore and sulfuric acid contains harmful substances such as heavy metal ions, sulfate, ammonia nitrogen and the like, and the cardiovascular or respiratory diseases can be caused by the long-term intake of the harmful substances in a human body. At present, the electrolytic manganese slag mainly comprises a direct landfill method, a curing method and the like which are common treatment and disposal technologies. The method for treating the electrolytic manganese slag by adopting the direct landfill method has the advantages of simple process and low treatment cost, and has the defects that a large amount of landfill electrolytic manganese slag can cause large-area land resources to be occupied, and simultaneously, the electrolytic manganese slag contains ammonia nitrogen and Cr 3+ 、Pb 2+ The harmful substances can be transferred, enriched and transformed in the environment in the landfill, thereby being capable of ecologically surrounding the landfillThe system is hazardous. The solidification method is adopted to treat the electrolytic manganese slag, and a catalyst is added into the electrolytic manganese slag, so that the electrolytic manganese slag is converted into a non-flowable compact solid, and then the solid is discharged into the nature. The curing method treatment technology does not completely remove harmful substances in the electrolytic manganese slag, because the catalyst used in the curing method has strong acidity, and most heavy metals are easy to dissolve out when being deposited in the strong acidity environment, so that pollutants can be exposed and secondary pollution can be caused.
Disclosure of Invention
Aiming at the problems in the prior art, the first purpose of the invention is to provide the baking-free brick with double doping of the electrolytic manganese slag and the waste clay brick, and the baking-free brick utilizes the synergistic effect of the electrolytic manganese slag and the waste clay brick, so that the problem of leaching of heavy metals in the electrolytic manganese slag is effectively solved while the mechanical strength of the baking-free brick is greatly improved, and the resource management of solid waste materials is realized.
The second purpose of the invention is to provide a preparation method of the baking-free brick with double doping of the electrolytic manganese slag and the waste clay brick, the method uniformly mixes all raw materials of the baking-free brick according to the set mass proportion, adds water and stirs, and obtains the baking-free brick through molding and curing.
In order to realize the technical purpose, the invention provides a double-doped baking-free brick of electrolytic manganese slag and waste clay bricks, which comprises the following raw material components: electrolytic manganese slag, waste sintered clay bricks, clay ceramsite, cement and curing agent; the curing agent is aliphatic amine curing agent.
In a preferred embodiment, the aliphatic amine curing agent is at least one of triethylene tetramine, ethylene diamine, divinyl triamine and triethylene triamine.
The double-doped baking-free brick provided by the invention takes the electrolytic manganese slag and the waste clay brick as main raw materials, and utilizes the synergistic effect of the electrolytic manganese slag and the waste clay brick, so that the mechanical property of the baking-free brick is greatly improved, and the problem of heavy metal leaching of the electrolytic manganese slag is effectively solved. The electrolytic manganese slag belongs to active waste slag, the content of silicon-aluminum compounds reaches 40%, the substances can have secondary hydration with cement hydration products, so that the hardness of a brick body is improved, the waste clay brick is used as aggregate on one hand, stacked to form a skeleton structure, transmits stress and plays a role in strength, and on the other hand, the waste clay brick absorbs the electrolytic manganese slag to have a coupling effect, so that an attachment site is provided for the electrolytic manganese slag, and heavy metal ions in the electrolytic manganese slag are fixed. The clay ceramsite plays a supporting role as a coarse aggregate, and the aliphatic amine curing agent has the function of increasing the early hardness of the baking-free brick at normal temperature, so that the baking-free brick is convenient to form.
As a preferred scheme, the double-doped baking-free brick comprises the following raw materials in percentage by mass: 15 to 35 percent of electrolytic manganese slag, 8 to 15 percent of cement, 0.5 to 2 percent of curing agent, 40 to 66 percent of waste sintered clay brick and 5 to 10 percent of clay ceramsite.
The main components of the waste sintered clay brick are calcium carbonate, wollastonite, alumina, quartz and the like, wherein the quartz can be activated to become a gelling active material, and other aggregates are wrapped by a gel substance generated by the reaction of the active quartz and calcium hydroxide to form a high-density network structure.
As a preferred scheme, the double-doped baking-free brick comprises the following raw materials in percentage by mass: 35% of electrolytic manganese slag, 10% of cement, 1% of curing agent, 46% of waste sintered clay brick and 8% of clay ceramsite.
Preferably, the electrolytic manganese slag is roasted electrolytic manganese slag, the water content is 0.1-5%, and the particle size is 1-5 mm.
As a preferable scheme, the water content of the waste sintered clay brick is less than or equal to 12 percent, and the content of the silicon-aluminum compound is more than or equal to 40.16 percent.
As a preferable scheme, the water content of the clay ceramsite is 0.3-0.6%, and the average particle size is 6-9 mm.
The invention also provides a preparation method of the double-doped baking-free brick containing the electrolytic manganese slag and the waste clay brick, which mainly comprises the following steps: the method comprises the steps of uniformly mixing raw materials including electrolytic manganese slag, cement, waste sintered clay bricks and clay ceramsite, adding a curing agent and water, and fully stirring to obtain the baking-free brick slurry, wherein the baking-free brick slurry is obtained after molding and curing.
The curing agent is added separately from other raw materials, and the addition of the curing agent aims to increase the early hardness of the baking-free brick and avoid the leakage or layering of the baking-free brick slurry in a mould, so that the curing agent can be fully mixed with the raw materials after being fully stirred with water in advance, otherwise, the raw materials are caked or slagged.
As a preferable scheme, the waste clay brick needs to be crushed and sieved, and the particle size is 1-6 mm.
As a preferable scheme, the adding amount of the water is measured according to the mass ratio of the water to the material of 0.08-0.16; the stirring conditions are as follows: the rotating speed is 25-41 r/min, and the time is 1.5-4.5 min.
Preferably, the molding pressure is 10 to 25MPa and the molding time is 1.5 to 3.6s.
Preferably, the curing method is indoor curing, the curing temperature is 18-25 ℃, and the curing relative humidity is 40-80%.
Further, the invention also provides a detailed process of the preparation method of the electrolytic manganese slag and waste clay brick double-doped baking-free brick, which comprises the following steps: 1) And crushing the waste sintered clay bricks one by using a crusher. And screening the above. 2) Fully mixing electrolytic manganese slag, cement, waste sintered clay bricks and clay ceramsite according to a corresponding proportion to obtain a brick making material, adding a curing agent into the mixed brick making material, and simultaneously adding water according to a set water-material mass ratio. And pouring the mixed materials into a stirrer, and stirring the stirrer for 3.0min at normal temperature and normal pressure at the rotating speed of 41r/min to obtain the baking-free brick slurry. 3) And (3) feeding the baking-free brick slurry into a block forming machine, adjusting the pressure to be 20MPa, and pressing for 3.6S to obtain a baking-free brick blank. 4) The unburned brick blank is naturally cured in indoor maintenance, the sun-shine and sun-shine radiation is avoided, the product needs to be watered once a day for one week before, and then only film covering maintenance is needed.
The baking-free brick provided by the invention has such excellent performance because the synergistic effect of the electrolytic manganese slag and the waste sintered clay brick is utilized, the electrolytic manganese slag contains a large amount of compounds with gelling activity, such as calcium-sulfur compounds, silicon-aluminum compounds and the like, and the compounds can perform secondary hydration with cement hydration products to greatly improve the hardness of a solidified body, but can also cause overlarge brittleness of the solidified body, and are easy to crack and break, and in addition, the current situations of leaching, alkali return, frost formation and the like of heavy metal ions are easy to occur in the subsequent use process. The waste sintered clay brick contains a large amount of aluminum oxide and silicon oxide, and the waste sintered clay brick has no gelling activity when being used alone, but can generate a complex reaction after being mixed with the electrolytic manganese slag, and sulfides in the electrolytic manganese slag can reconstruct aluminum oxide and silicon oxide to form a cross-linked complex network, so that heavy metal ions in the electrolytic manganese slag are fixed; in addition, the waste sintered clay brick is weak in acidity, so that alkaline substances in the electrolytic manganese slag can be effectively neutralized, and the occurrence of alkali return in the using process is effectively reduced.
Compared with the prior art, the invention has the beneficial technical effects that:
1) The baking-free brick doped with the electrolytic manganese slag and the waste clay has the advantages of wide raw material sources and low cost, and through the synergistic effect between the electrolytic manganese slag and the waste clay, the mechanical strength of the baking-free brick is greatly improved, and the problem of leaching of heavy metals in the electrolytic manganese slag is effectively solved. The baking-free brick has wide application in the fields of construction, decoration and the like, and realizes the resource utilization of solid waste materials.
2) The preparation method of the double-doped baking-free brick provided by the invention has the advantages of simplicity, easiness in operation, convenience in operation, environmental friendliness, no secondary pollution and the like, the production investment cost is low, the cost of each block of the obtained baking-free brick is lower than 0.2 yuan, and the preparation method is suitable for large-scale continuous industrial production.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following examples are provided to illustrate the present invention in further detail. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The raw material ratio is as follows: 20 percent of electrolytic manganese slag (with the water content of 5 percent), 8 percent of Portland cement, 0.5 percent of diethylenetriamine curing agent, 65 percent of waste sintered clay brick and 6.5 percent of clay ceramsite. The preparation method comprises the following steps:
(1) Pretreatment: and crushing the waste sintered clay bricks one by using a crusher. Wherein the average particle size of the waste sintered clay brick formed by crushing is 3.5mm. Then, the above-mentioned screening is performed.
(2) Mixing and stirring: and fully mixing the electrolytic manganese slag, the cement, the waste sintered clay brick and the clay ceramsite according to a corresponding proportion by using a stirrer to obtain the brick making material.
(3) Adding a divinyltriamine curing agent into the mixed materials, and simultaneously adding a proper amount of water, wherein the mass ratio of water to materials is 0.10, the stirring time of the stirrer is 3.0min under normal temperature and pressure, and the rotating speed is 41r/min.
(4) The finished product is sent to a finished product stacking system by a walking machine for automatic demolding and stacking on a tray. Wherein the forming pressure of the forming machine is 15MPa, the vibration time of the vibration platform is 0.8s, and the pressing time of the upper pressure head is 3.6s.
(5) The natural curing method is carried out at room temperature, sun radiation is avoided, the product needs to be watered once a day for one week before the product is produced, only film covering curing is needed, and the product can leave the factory after 28 days.
The 28d compressive strength of the finished product is measured to be 17.5MPa, and reaches MU15 strength grade specified by GBT21144-2007 concrete solid bricks.
Example 2
The raw material ratio is as follows: 27 percent of electrolytic manganese slag (with the water content of 3 percent), 12 percent of Portland cement, 0.5 percent of divinyltriamine curing agent, 55 percent of waste sintered clay brick and 5.5 percent of clay ceramsite. The preparation method comprises the following steps:
(1) Pretreatment: and crushing the waste sintered clay bricks one by using a crusher. Wherein the average grain diameter of the waste sintered clay brick formed by crushing is 3.0mm. Then, the above-mentioned screening is performed.
(2) Mixing and stirring: and fully mixing the electrolytic manganese slag, the cement, the waste sintered clay brick and the clay ceramsite according to a corresponding proportion by using a stirrer to obtain the brick making material.
(3) Adding a divinyltriamine curing agent into the mixed materials, and simultaneously adding a proper amount of water, wherein the mass ratio of water to materials is 0.12, the stirring time of the stirrer is 3.5min under normal temperature and pressure, and the rotating speed is 41r/min.
(4) The finished product is sent to a finished product stacking system by a walking machine for automatic demolding and stacking on a tray. Wherein the forming pressure of the forming machine is 25MPa, the vibration time of the vibration platform is 0.8s, and the pressing time of the upper pressure head is 3.6s.
(5) The natural curing method is carried out at room temperature, sun radiation is avoided, the product needs to be watered once a day for one week before the product is produced, only film covering curing is needed, and the product can leave the factory after 28 days.
The 28d compressive strength of the finished product is measured to be 21.2MPa and reaches MU20 strength grade specified in GBT21144-2007 concrete solid bricks.
Example 3
The raw material ratio is as follows: 32.5 percent of electrolytic manganese slag (with the water content of 1 percent), 13 percent of Portland cement, 1.5 percent of diethylenetriamine curing agent, 42 percent of waste sintered clay brick and 11 percent of clay ceramsite. The preparation method comprises the following steps:
(1) Pretreatment: and crushing the waste sintered clay bricks one by using a crusher. Wherein the average grain diameter of the waste sintered clay brick formed by crushing is 1.5mm. Then, the above-mentioned screening is performed.
(2) Mixing and stirring: and fully mixing the electrolytic manganese slag, the cement, the waste sintered clay brick and the clay ceramsite according to a corresponding proportion by using a stirrer to obtain the brick making material.
(3) Adding the divinyltriamine curing agent into the mixed materials, and simultaneously adding a proper amount of water, wherein the mass ratio of water to materials is 0.14, the stirring time of the stirrer is 2.5min under normal temperature and pressure, and the rotating speed is 41r/min.
(4) The finished product is sent to a finished product stacking system by a walking machine for automatic demolding and stacking on a tray. Wherein the forming pressure of the forming machine is 20MPa, the vibration time of the vibration platform is 0.8s, and the pressing time of the upper pressure head is 3.6s.
(5) The natural curing method is carried out at room temperature, sun radiation is avoided, the product needs to be watered once a day for one week before the product is produced, only film covering curing is needed, and the product can leave the factory after 28 days.
The 28d compressive strength of the finished product is measured to be 14.3MPa and reaches MU10 strength grade specified in GBT21144-2007 concrete solid bricks.
Example 4
The raw material ratio is as follows: 35 percent of electrolytic manganese slag (with the water content of 0.5 percent), 10 percent of Portland cement, 1 percent of diethylenetriamine curing agent, 46 percent of waste sintered clay brick and 8 percent of clay ceramsite. The preparation method comprises the following steps:
(1) Pretreatment: and crushing the waste sintered clay bricks one by using a crusher. Wherein the average particle size of the waste sintered clay brick formed by crushing is 3.0mm. Then, both of the above were screened.
(2) Mixing and stirring: and fully mixing the electrolytic manganese slag, the cement, the waste sintered clay brick and the clay ceramsite according to a corresponding proportion by using a stirrer to obtain the brick making material.
(3) And adding the divinyltriamine curing agent into the well mixed materials, and simultaneously adding a proper amount of water, wherein the mass ratio of the water to the materials is 0.12, the stirring time of the stirrer is 3.0min under normal temperature and normal pressure, and the rotating speed is 41r/min.
(4) The finished product is conveyed to a finished product stacking system by a traveling machine for automatic demolding and stacking to a tray. Wherein the forming pressure of the forming machine is 20MPa, the vibration time of the vibration platform is 0.8s, and the pressing time of the upper pressure head is 3.6s.
(5) The natural curing method is carried out at room temperature, sun radiation is avoided, the product needs to be watered once a day for one week before the product is produced, only film covering curing is needed, and the product can leave the factory after 28 days.
The 28d compressive strength of the finished product is measured to be 26.4MPa and reaches MU25 strength grade specified by GBT21144-2007 concrete solid bricks.
The performance of the electrolytic manganese slag heavy metal leaching toxicity and the baking-free brick obtained in the preferred embodiment are respectively detected according to a test method of hazardous waste identification standard-leaching toxicity identification (GB 5085.3-2007), and the detection results are respectively as follows:
table 1 results of testing toxicity of leaching heavy metal of the product obtained in example 4
Figure BDA0003664076980000071
Table 2 example 4 test results of mechanical properties of baking-free bricks
Figure BDA0003664076980000072
Comparative example 1
The raw material ratio is as follows: 85 percent of electrolytic manganese slag (with the water content of 5 percent), 8 percent of Portland cement, 0.5 percent of triethylene triamine curing agent and 6.5 percent of clay ceramsite. The preparation method comprises the following steps:
(1) Mixing and stirring: and fully mixing the electrolytic manganese slag, the cement and the clay ceramsite according to a corresponding proportion by using a stirrer to obtain the brick making material.
(2) Adding aliphatic amine curing agent into the mixed material, and simultaneously adding a proper amount of water, wherein the mass ratio of water to material is 0.10, the stirring time of the stirrer is 3.0min under normal temperature and pressure, and the rotating speed is 41r/min.
(3) The finished product is sent to a finished product stacking system by a walking machine for automatic demolding and stacking on a tray. Wherein the forming pressure of the forming machine is 20MPa, the vibration time of the vibration platform is 0.8s, and the pressing time of the upper pressure head is 3.6s.
(4) The natural curing method is carried out at room temperature, sun radiation is avoided, the product needs to be watered once a day for one week before the product is produced, only film covering curing is needed, and the product can leave the factory after 28 days.
The measured compressive strength of the finished product 28d is 2.5MPa and cannot reach the lowest MU10 strength grade specified by GBT21144-2007 concrete solid bricks.
Comparative example 2
The raw material ratio is as follows: 5 percent of electrolytic manganese slag (with the water content of 5 percent), 8 percent of Portland cement, 0.5 percent of diethylenetriamine, 80 percent of waste sintered clay brick and 6.5 percent of clay ceramsite. The preparation method comprises the following steps:
(1) Pretreatment: and crushing the waste sintered clay bricks one by using a crusher. Wherein the average grain diameter of the waste sintered clay brick formed by crushing is 3.0mm. Then, the above-mentioned screening is performed.
(2) Mixing and stirring: and fully mixing the electrolytic manganese slag, the waste sintered clay brick, the cement and the clay ceramsite according to a corresponding proportion by using a stirrer to obtain the brick making material.
(3) Adding aliphatic amine curing agent into the mixed material, and simultaneously adding a proper amount of water, wherein the mass ratio of water to material is 0.10, the stirring time of the stirrer is 3.0min under normal temperature and pressure, and the rotating speed is 41r/min.
(4) The finished product is sent to a finished product stacking system by a walking machine for automatic demolding and stacking on a tray. Wherein the forming pressure of the forming machine is 20MPa, the vibration time of the vibration platform is 0.8s, and the pressing time of the upper pressure head is 3.6s.
(5) The natural curing method is carried out at room temperature, sun radiation is avoided, the product needs to be watered once a day for one week before the product is produced, only film covering curing is needed, and the product can leave the factory after 28 days.
The measured compressive strength of the finished product 28d is 9.5MPa and cannot reach the lowest MU10 strength grade specified by GBT21144-2007 concrete solid bricks.
Comparative example 3
The raw material ratio is as follows: 10 percent of electrolytic manganese slag (with the water content of 5 percent), 8 percent of Portland cement, 0.5 percent of ethylenediamine, 75 percent of waste sintered clay brick and 6.5 percent of clay ceramsite. The preparation method comprises the following steps:
(1) Pretreatment: and crushing the waste sintered clay bricks one by using a crusher. Wherein the average grain diameter of the waste sintered clay brick formed by crushing is 3.0mm. Then, the above-mentioned screening is performed.
(2) Mixing and stirring: and fully mixing the electrolytic manganese slag, the waste sintered clay brick, the cement and the clay ceramsite according to a corresponding proportion by using a stirrer to obtain the brick making material.
(3) Adding aliphatic amine curing agent into the mixed material, and simultaneously adding a proper amount of water, wherein the mass ratio of water to material is 0.10, the stirring time of the stirrer is 3.0min under normal temperature and pressure, and the rotating speed is 41r/min.
(4) The finished product is sent to a finished product stacking system by a walking machine for automatic demolding and stacking on a tray. Wherein the forming pressure of the forming machine is 20MPa, the vibration time of the vibration platform is 0.8s, and the pressing time of the upper pressure head is 3.6s.
(5) The natural curing method is carried out at room temperature, sun radiation is avoided, the product needs to be watered once a day for one week before the product is produced, only film covering curing is needed, and the product can leave the factory after 28 days.
The measured compressive strength of the finished product 28d is 13.5MPa, and reaches the MU10 strength grade specified by GBT21144-2007 concrete solid bricks, but does not reach the MU25 strength grade specified by GBT21144-2007 concrete solid bricks.
Comparative example 4
In the comparative example, the added curing agent is aromatic amine curing agent diaminodiphenylmethane, the other conditions are completely the same as those in example 4, and the obtained finished product is 28d, and then is cracked and layered after demoulding, and the brick body is subjected to powder removal, so that the finished product can not reach the standard specified in GBT21144-2007 concrete solid brick.
It can be seen from the above comparative examples that when only waste sintered clay bricks or electrolytic manganese slag are added into a non-fired brick, the strength of the brick body is reduced and cannot meet the required standard of the non-fired brick, and in addition, if no aliphatic amine curing agent is adopted, the brick body is layered, so that the final forming cannot be carried out.
The above embodiments are merely illustrative of the present patent and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.

Claims (7)

1. The double-doped baking-free brick of the electrolytic manganese slag and the waste clay brick is characterized in that: the raw material components are as follows: electrolytic manganese slag, waste sintered clay bricks, clay ceramsite, cement and curing agent; the curing agent is an aliphatic amine curing agent; the baking-free brick comprises the following components in percentage by mass: 15 to 35 percent of electrolytic manganese slag, 8 to 15 percent of cement, 0.5 to 2 percent of curing agent, 40 to 66 percent of waste sintered clay brick and 5 to 10 percent of clay ceramsite; the baking-free brick is prepared by the following method: uniformly mixing raw materials including electrolytic manganese slag, cement, waste sintered clay bricks and clay ceramsite, adding a curing agent and water, and fully stirring to prepare baking-free brick slurry, wherein the baking-free brick slurry is obtained after molding and curing.
2. The electrolytic manganese slag and waste clay brick double-doped baking-free brick as claimed in claim 1, characterized in that: the composite material comprises the following components in percentage by mass: 35% of electrolytic manganese slag, 10% of cement, 1% of curing agent, 46% of waste sintered clay brick and 8% of clay ceramsite.
3. The baking-free brick doubly doped with the electrolytic manganese slag and the waste clay brick according to any one of claims 1 to 2, wherein:
the electrolytic manganese slag is roasted electrolytic manganese slag, the water content is 0.1-5%, and the particle size is 1-5 mm;
the water content of the waste sintered clay brick is less than or equal to 12 percent, and the content of the silicon-aluminum compound is more than or equal to 40.16 percent;
the water content of the clay ceramsite is 0.3-0.6%, and the average particle size is 6-9 mm.
4. The electrolytic manganese slag and waste clay brick double-doped baking-free brick as claimed in claim 1, characterized in that: the waste clay brick is subjected to crushing and sieving treatment, and the particle size is 1-6 mm.
5. The electrolytic manganese slag and waste clay brick double-doped baking-free brick according to claim 1, which is characterized in that: the adding amount of the water is measured according to the mass ratio of the water to the material of 0.08-0.16; the stirring conditions are as follows: the rotating speed is 25-41 r/min, and the time is 1.5-4.5 min.
6. The electrolytic manganese slag and waste clay brick double-doped baking-free brick as claimed in claim 1, characterized in that: the molding pressure is 10-25 MPa, and the molding time is 1.5-3.6 s.
7. The electrolytic manganese slag and waste clay brick double-doped baking-free brick according to claim 1, which is characterized in that: the curing mode is indoor curing, the curing temperature is 18-25 ℃, and the curing relative humidity is 40-80%.
CN202210588477.0A 2022-05-26 2022-05-26 Electrolytic manganese slag and waste clay brick double-doped baking-free brick and preparation method thereof Active CN114890749B (en)

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CN106082881B (en) * 2016-06-29 2018-06-29 山东建筑大学 A kind of paving brick prepared using discarded clay brick and preparation method thereof
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