CN113603436A - Comprehensive utilization method of desulfurized gypsum wastewater - Google Patents
Comprehensive utilization method of desulfurized gypsum wastewater Download PDFInfo
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- CN113603436A CN113603436A CN202111041842.8A CN202111041842A CN113603436A CN 113603436 A CN113603436 A CN 113603436A CN 202111041842 A CN202111041842 A CN 202111041842A CN 113603436 A CN113603436 A CN 113603436A
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- 239000010440 gypsum Substances 0.000 title claims abstract description 102
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000002351 wastewater Substances 0.000 title claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 50
- 230000003068 static effect Effects 0.000 claims abstract description 38
- 238000005520 cutting process Methods 0.000 claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 34
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 28
- 238000004537 pulping Methods 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 11
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 239000004571 lime Substances 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000010025 steaming Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 230000000284 resting effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000002910 solid waste Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000008235 industrial water Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/12—Hydraulic lime
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/002—Water
- C04B22/0046—Waste slurries or solutions used as gauging water
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/40—Porous or lightweight materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of comprehensive utilization of solid waste liquid and waste liquid, in particular to a comprehensive utilization method of desulfurized gypsum waste water. The method comprises the following steps: adding desulfurized gypsum wastewater and fly ash into a pulping stirrer, stirring for a certain time, measuring the diffusivity of the slurry to reach a standard, and heating the pulping temperature to a certain temperature by using steam; pouring the prepared slurry into a pouring stirring tank, adding RGM concrete reinforcing agent slurry, adding lime and aluminum powder, stirring uniformly, and pouring the slurry into a mold box; moving the mould box which is poured with the slurry to a static curing room for static gas generation; after the static curing is finished, cutting the blank by using a cutting machine after the blank reaches the cutting hardness; and (3) putting the cut building block blank into a still kettle, and steaming and pressing the building block blank by steam at a certain pressure and temperature to prepare a finished product of the autoclaved aerated concrete building block. The invention provides a comprehensive utilization method of desulfurized gypsum wastewater for utilizing solid waste liquid and producing autoclaved aerated concrete blocks.
Description
Technical Field
The invention relates to the technical field of comprehensive utilization of solid waste liquid and waste liquid, in particular to a comprehensive utilization method of desulfurized gypsum waste water.
Background
The autoclaved aerated concrete block is a porous concrete product prepared by taking fly ash, lime, cement, gypsum, slag and the like as main raw materials, adding a proper amount of a gas former, a regulator and a bubble stabilizer, and carrying out the processes of batching, stirring, pouring, standing, cutting, high-pressure steam curing and the like. The traditional process technology mainly adopts fly ash, lime and cement as main raw materials, gypsum and aluminum powder as auxiliary raw materials, industrial water is added according to a certain proportion, after stirring and mixing, static curing gas generation and cutting steam pressing are carried out, the proportion of the industrial water used in the process is large, the average water consumption reaches 340 kg/cubic building block, and the water consumption cost is high.
Disclosure of Invention
The invention aims to provide a comprehensive utilization method of desulfurized gypsum wastewater for utilizing solid waste liquid and producing autoclaved aerated concrete blocks.
The technical scheme adopted by the invention is as follows: the comprehensive utilization method of the desulfurized gypsum wastewater comprises the following steps:
the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900-;
step two: and (3) casting: pumping the slurry prepared in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry with the weight of 280 plus materials, adding 350kg of lime with the weight of 280 plus materials into the pouring stirring tank, adding 2.2-2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box with the height of 4.8 m;
step three: the rest process: moving the mould box which is poured with the slurry in the step two to a resting room for static gas generation, wherein the temperature of the resting room is kept at 50 +/-5 ℃, and the time of the static gas generation is 80-90 minutes;
step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;
step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, and steaming and pressing for 5-6 hours by using steam with the pressure of 0.9-1.2MPa and the temperature of 175-.
The percentage of the desulfurized gypsum wastewater in the proportion is 35-45%, and the percentage of the fly ash in the proportion is 55-65%.
The volume of the mould box is 3.5 cubic.
The finished product of the autoclaved aerated concrete block has the kettle-discharging strength of more than 3.5MPa and the capacity of 625kg/m3Within.
The RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 84-140kg, and the weight of the gypsum is 168-245 kg; the percentage of the red mud in the proportion is 30-40%, and the percentage of the gypsum in the proportion is 60-70%.
The diffusion degree of the RGM concrete reinforcing agent is 19-22 cm.
The gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.
The red mud and the gypsum are fully and uniformly mixed after filtering particles with the diameter of more than 0.5cm to prepare the RGM concrete reinforcing agent.
The invention has the beneficial effects that:
the method uses the desulfurized gypsum wastewater to replace industrial water, is used for producing the autoclaved aerated concrete block, and has the advantages of low cost and high cost performance, and the strength of the finished product of the produced autoclaved aerated concrete block reaches the standard; the desulfurization gypsum wastewater generated in the production process of enterprises such as thermal power plants and titanium dioxide plants is utilized, so that the environmental protection problem of the development of the enterprises is solved, and the cost for treating the desulfurization gypsum wastewater by the enterprises is greatly saved.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
The comprehensive utilization method of the desulfurized gypsum wastewater comprises the following steps:
the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900-;
step two: and (3) casting: pumping the slurry prepared in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry with the weight of 280 plus materials, adding 350kg of lime with the weight of 280 plus materials into the pouring stirring tank, adding 2.2-2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box with the height of 4.8 m;
step three: the rest process: moving the mould box which is poured with the slurry in the step two to a resting room for static gas generation, wherein the temperature of the resting room is kept at 50 +/-5 ℃, and the time of the static gas generation is 80-90 minutes;
step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;
step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, and steaming and pressing for 5-6 hours by using steam with the pressure of 0.9-1.2MPa and the temperature of 175-.
The percentage of the desulfurized gypsum wastewater in the proportion is 35-45%, and the percentage of the fly ash in the proportion is 55-65%.
The volume of the mould box is 3.5 cubic.
The finished product of the autoclaved aerated concrete block has the kettle-discharging strength of more than 3.5MPa and the capacity of 625kg/m3Within.
The RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 84-140kg, and the weight of the gypsum is 168-245 kg; the percentage of the red mud in the proportion is 30-40%, and the percentage of the gypsum in the proportion is 60-70%.
The diffusion degree of the RGM concrete reinforcing agent is 19-22 cm.
The gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.
The red mud and the gypsum are fully and uniformly mixed after filtering particles with the diameter of more than 0.5cm to prepare the RGM concrete reinforcing agent.
Example 1:
the production process of the autoclaved aerated concrete block comprises the following steps:
the method comprises the following steps: pulping: adding 1050kg of desulfurized gypsum wastewater and 1400kg of fly ash into a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 45 ℃ by using steam;
step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 310kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 310kg of lime into the pouring stirring tank, adding 2.5kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;
the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 108.5kg, the weight of the gypsum is 201.5kg, the percentage of the red mud in percentage by weight is 35%, and the percentage of the gypsum in percentage by weight is 65%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.
Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;
step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;
step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.
Example 2:
the production process of the autoclaved aerated concrete block comprises the following steps:
the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900kg and fly ash with the weight of 1250kg into a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 42 ℃ by using steam;
step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 280kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 280kg of lime into the pouring stirring tank, adding 2.2kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;
the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 84kg, the weight of the gypsum is 196kg, the percentage of the red mud in percentage by weight is 30%, and the percentage of the gypsum in percentage by weight is 70%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.
Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;
step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;
step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.
Example 3:
the production process of the autoclaved aerated concrete block comprises the following steps:
the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900kg and fly ash with the weight of 1250kg into a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 42 ℃ by using steam;
step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 280kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 280kg of lime into the pouring stirring tank, adding 2.2kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;
the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 112kg, the weight of the gypsum is 168kg, the percentage of the red mud in the proportion is 40%, and the percentage of the gypsum in the proportion is 60%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.
Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;
step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;
step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.
Example 4:
the production process of the autoclaved aerated concrete block comprises the following steps:
the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 1200kg and fly ash with the weight of 1550kg by using a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 48 ℃ by using steam;
step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 350kg of lime into the pouring stirring tank, adding 2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;
the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 140kg, the weight of the gypsum is 210kg, the percentage of the red mud in the proportion is 40%, and the percentage of the gypsum in the proportion is 60%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.
Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;
step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;
step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.
Example 5:
the production process of the autoclaved aerated concrete block comprises the following steps:
the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 1200kg and fly ash with the weight of 1550kg by using a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 48 ℃ by using steam;
step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 350kg of lime into the pouring stirring tank, adding 2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;
the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 105kg, the weight of the gypsum is 245kg, the percentage of the red mud in the proportion is 30%, and the percentage of the gypsum in the proportion is 70%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.
Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;
step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;
step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.
The cost data for the steam pressurized concrete block plant with a 2000 cubic per day output using the conventional process and the process described in example 1 is shown in the following table:
therefore, the autoclaved aerated concrete block produced by the invention uses the desulfurized gypsum wastewater to replace industrial water, the cost is saved by 0.85 yuan when 1 cubic autoclaved aerated concrete block is produced compared with the traditional process method, the cost of an autoclaved aerated concrete block factory with the daily output of 2000 cubic meters can be saved by 1700 yuan each day, and 60 ten thousand yuan can be saved each year; the method scientifically utilizes the desulfurized gypsum wastewater generated in the production process of enterprises such as thermal power plants, titanium dioxide plants and the like, not only solves the environmental protection problem faced by the development of the enterprises, but also saves great cost for the enterprises to treat the desulfurized gypsum wastewater, and the cost of the traditional method for treating the desulfurized gypsum wastewater by the enterprises at present is 40 yuan/cubic; the technical method is adopted in an autoclaved aerated concrete block factory with the daily output of 2000 cubes, and the comprehensive cost of upstream and downstream enterprises can be saved by 29000 Yuan/day when 1 cube of desulfurized gypsum wastewater is comprehensively utilized.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The comprehensive utilization method of the desulfurized gypsum wastewater is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900-;
step two: and (3) casting: pumping the slurry prepared in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry with the weight of 280 plus materials, adding 350kg of lime with the weight of 280 plus materials into the pouring stirring tank, adding 2.2-2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box with the height of 4.8 m;
step three: the rest process: moving the mould box which is poured with the slurry in the step two to a resting room for static gas generation, wherein the temperature of the resting room is kept at 50 +/-5 ℃, and the time of the static gas generation is 80-90 minutes;
step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;
step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, and steaming and pressing for 5-6 hours by using steam with the pressure of 0.9-1.2MPa and the temperature of 175-.
2. The comprehensive utilization method of desulfurized gypsum wastewater according to claim 1, characterized in that: the percentage of the desulfurized gypsum wastewater in the proportion is 35-45%, and the percentage of the fly ash in the proportion is 55-65%.
3. The comprehensive utilization method of desulfurized gypsum wastewater according to claim 1, characterized in that: the volume of the mould box is 3.5 cubic.
4. The comprehensive utilization method of desulfurized gypsum wastewater according to claim 1, characterized in that: the finished product of the autoclaved aerated concrete block has the kettle-discharging strength of more than 3.5MPa and the capacity of 625kg/m3Within.
5. The comprehensive utilization method of desulfurized gypsum wastewater according to claim 1, characterized in that: the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 84-140kg, and the weight of the gypsum is 168-245 kg; the percentage of the red mud in the proportion is 30-40%, and the percentage of the gypsum in the proportion is 60-70%.
6. The method for comprehensively utilizing desulfurized gypsum wastewater according to claim 5, wherein: the diffusion degree of the RGM concrete reinforcing agent is 19-22 cm.
7. The method for comprehensively utilizing desulfurized gypsum wastewater according to claim 5, wherein: the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.
8. The method for comprehensively utilizing desulfurized gypsum wastewater according to claim 5, wherein: the red mud and the gypsum are fully and uniformly mixed after filtering particles with the diameter of more than 0.5cm to prepare the RGM concrete reinforcing agent.
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| CN202111041842.8A CN113603436A (en) | 2021-09-07 | 2021-09-07 | Comprehensive utilization method of desulfurized gypsum wastewater |
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| CN202111041842.8A CN113603436A (en) | 2021-09-07 | 2021-09-07 | Comprehensive utilization method of desulfurized gypsum wastewater |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2681166C1 (en) * | 2018-01-10 | 2019-03-04 | Общество с ограниченной ответственностью "Главстрой-Усть-Лабинск" | Autoclaved aerated concrete product, method of its manufacture, mixture for its manufacture and method of manufacture of mixture |
| CN111253138A (en) * | 2020-01-11 | 2020-06-09 | 滨州市滨北百奥再生资源有限公司 | Production process of autoclaved aerated concrete block |
| CN111763059A (en) * | 2020-07-16 | 2020-10-13 | 上海百奥恒再生资源有限公司 | Process for producing autoclaved aerated concrete blocks by utilizing desulfurized gypsum wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2681166C1 (en) * | 2018-01-10 | 2019-03-04 | Общество с ограниченной ответственностью "Главстрой-Усть-Лабинск" | Autoclaved aerated concrete product, method of its manufacture, mixture for its manufacture and method of manufacture of mixture |
| CN111253138A (en) * | 2020-01-11 | 2020-06-09 | 滨州市滨北百奥再生资源有限公司 | Production process of autoclaved aerated concrete block |
| CN111763059A (en) * | 2020-07-16 | 2020-10-13 | 上海百奥恒再生资源有限公司 | Process for producing autoclaved aerated concrete blocks by utilizing desulfurized gypsum wastewater |
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