A batching process for the production of autoclaved aerated concrete (AAC) bricks

Abstract

This invention discloses a batching process for producing autoclaved aerated concrete (AAC) bricks. In this invention, secondary acid-washed brown corundum, primary alum, and dense white corundum are added to the raw materials for AAC brick production. This improves the impact resistance of the resulting AAC bricks and makes their surface smoother and more aesthetically pleasing, thus enhancing the overall appearance and durability of the bricks during use. Furthermore, the addition of calcium lignosulfonate solution to these raw materials promotes phase transformation and sintering, reducing firing time and increasing firing speed. This allows the method to be suitable for large-scale production, improving economic efficiency. The addition of wear-resistant agents to the anti-corrosion powder enhances the corrosion resistance and wear resistance of the concrete bricks, extending their normal service life.

Description

Technical Field

[0001] This invention belongs to the technical field of aerated concrete brick preparation process, specifically a batching process for autoclaved aerated concrete brick production. Background Technology

[0002] Autoclaved aerated concrete (AAC) is a lightweight, porous silicate product made primarily from siliceous materials (sand, fly ash, and silica-containing tailings) and calcareous materials (lime and cement), with the addition of a foaming agent (aluminum powder). The process involves batching, mixing, pouring, pre-curing, cutting, autoclaving, and curing. AAC bricks possess fire resistance and thermal insulation properties, meeting the dual requirements of energy efficiency and innovation in wall materials.

[0003] However, common aerated concrete blocks do not have strong enough corrosion resistance and impact resistance during use, which makes them prone to damage after a long period of use, affecting the convenience of use. Summary of the Invention

[0004] The purpose of this invention is to provide a batching process for the production of autoclaved aerated concrete (AAC) bricks in order to solve the problems mentioned above.

[0005] The technical solution adopted in this invention is as follows: a batching process for the production of autoclaved aerated concrete (AAC) bricks, the batching process for AAC brick production includes the following steps:

[0006] S1: Prepare the seismic strengthening powder by weighing 100-120 parts by weight of secondary acid-washed brown fused alumina, 80-100 parts by weight of ordinary brown fused alumina, 100-120 parts by weight of andalusite, 100-120 parts by weight of extra-grade bauxite, 80-100 parts by weight of first-grade bauxite, and 100-120 parts by weight of dense white fused alumina.

[0007] S2: Add the sub-acid-washed brown fused alumina, ordinary brown fused alumina and andalusite weighed in step S1 into the inside of the pulverizing ball mill A and grind them. After grinding, the premixed powder is obtained for later use.

[0008] S3: Add high-grade bauxite, first-grade bauxite and dense white corundum to the raw material ground in step S2, and add 100 to 120 parts of sillimanite at the same time. Continue to grind it. After grinding, the autoclaved aerated concrete brick material A is obtained for later use.

[0009] S4: Measure 1000-1200 parts of calcium lignosulfonate solution, take it to a mixer, add the autoclaved aerated concrete brick batch A obtained in step S3 into the mixer, and then add 500-800 parts of calcium lignosulfonate solution into the mixer to obtain mixed raw material B.

[0010] S5: Prepare the anti-corrosion powder by weighing 150-170 parts of cement, 120-135 parts of tailings powder, 80-150 parts of lime, 130-145 parts of riverbed silt and sand, 360-380 parts of water, 15-34 parts of steel slag from steel mills, 10-15 parts of foaming agent, 14-23 parts of wear-resistant agent, 8-15 parts of dispersant, and 11-24 parts of polypropylene fiber.

[0011] S6: Weigh out 150-170 parts of cement, 120-135 parts of tailings powder, 80-150 parts of lime, 130-145 parts of riverbed silt and sand, and 360-380 parts of water and add them into the mixer. Then start stirring to obtain a mixture for later use.

[0012] S7: Add 15-34 parts of steel slag from the steel plant, 10-15 parts of foaming agent, 14-23 parts of wear-resistant agent, 8-15 parts of dispersant and 11-24 parts of polypropylene fiber weighed in step S5 into the inside of the grinding ball mill and grind them.

[0013] S8: After grinding is completed, the mixture from step S6 is added into the inside of the ball mill and ground with the same parameters as in step S7. After grinding is completed, mixed raw material C is obtained.

[0014] S9: Thoroughly mix the mixed raw material C obtained in step S8 and the mixed raw material B obtained in step S4 in the mixing equipment;

[0015] S10: After the mixing process in step S9 is completed, the mixture is removed, and then the entire autoclaved aerated concrete brick production batching process is completed.

[0016] In a preferred embodiment, in step S2, the speed of the ball mill is controlled at 1400 r / min, and the grinding time is 150 min.

[0017] In a preferred embodiment, in step S3, the speed of the ball mill is controlled at 1500 r / min, and the grinding time is 180 min.

[0018] In a preferred embodiment, in step S4, the mixing temperature of the mixer is controlled at 150 degrees Celsius, and the mixing time is 60 minutes.

[0019] In a preferred embodiment, in step S5, the foaming agent is a mixture of sodium dodecylbenzenesulfonate, dodecenylsuccinamide ammonium acetate, and dodecyl alcohol, and the weight ratio of sodium dodecylbenzenesulfonate, dodecenylsuccinamide ammonium acetate, and dodecyl alcohol is 7:9:1.

[0020] In a preferred embodiment, in step S5, the wear-resistant agent is one of sodium alginate, PEEK resin powder, or mica powder.

[0021] In a preferred embodiment, in step S5, the dispersant is bamboo pulp lignin.

[0022] In a preferred embodiment, in step S6, the mixing temperature of the mixer is controlled at 200 degrees Celsius, the mixing time is 60 minutes, and the stirring speed during mixing is 500 r / min.

[0023] In a preferred embodiment, in step S7, the speed of the ball mill is controlled at 1000 r / min, and the grinding time is 180 min.

[0024] In a preferred embodiment, in step S10, when mixing in the stirring device, the temperature is controlled at 50-60°C, the mixing time is 30 minutes, and the mixing speed is 500 r / min.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. In this invention, secondary acid-washed brown corundum, primary alum, and dense white corundum are added to the raw materials for autoclaved aerated concrete (AAC) brick production. This improves the impact resistance of the AAC bricks and makes the surface of the AAC bricks smoother and more aesthetically pleasing, thereby enhancing the overall appearance and durability of the bricks during use. Furthermore, the addition of calcium lignosulfonate solution to these raw materials promotes phase transformation and sintering, reduces firing time, and increases firing speed. This allows the method to be suitable for larger-scale firing, improving economic efficiency.

[0027] 2. In this invention, the addition of wear-resistant agent to the anti-corrosion powder can improve the corrosion resistance and wear resistance of concrete bricks, and increase the normal service life of concrete bricks during use. Polypropylene fiber can improve the tensile strength of concrete bricks, making it less prone to breakage during normal use, thereby improving the overall mechanical strength of the brick body and increasing the service life and durability of the brick body. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] A batching process for producing autoclaved aerated concrete (AAC) bricks, comprising the following steps:

[0031] S1: Prepare the anti-seismic strengthening powder by weighing 120 parts by weight of secondary acid-washed brown fused alumina, 100 parts by weight of ordinary brown fused alumina, 120 parts by weight of andalusite, 120 parts by weight of special grade bauxite, 100 parts by weight of first grade bauxite and 120 parts by weight of dense white fused alumina.

[0032] S2: Add the sub-acid-washed brown fused alumina, ordinary brown fused alumina and andalusite weighed in step S1 into the inside of the pulverizing ball mill A and grind them. After grinding, the premixed powder is obtained for later use.

[0033] S3: Add premium bauxite, first-grade bauxite and dense white corundum to the raw material ground in step S2, and add 120 parts of sillimanite at the same time. Continue grinding. After grinding, autoclaved aerated concrete brick material A is obtained for later use.

[0034] S4: Measure 1200 parts of calcium lignosulfonate solution, take it to a mixer, add the autoclaved aerated concrete brick batch A obtained in step S3 into the mixer, and then add 800 parts of calcium lignosulfonate solution into the mixer to obtain mixed raw material B.

[0035] S5: Prepare anti-corrosion powder by weighing 170 parts of cement, 135 parts of tailings powder, 150 parts of lime, 145 parts of riverbed silt and sand, 380 parts of water, 34 parts of steel slag from steelmaking plant, 15 parts of foaming agent, 23 parts of wear-resistant agent, 15 parts of dispersant and 24 parts of polypropylene fiber.

[0036] S6: After weighing out cement, tailings powder, lime, riverbed silt and sand, and water, add them into the mixer and start stirring to obtain a mixture for later use.

[0037] S7: Add the steel slag, foaming agent, wear-resistant agent, dispersant and polypropylene fiber weighed in step S5 into the inside of the grinding ball mill and grind them.

[0038] S8: After grinding is completed, the mixture from step S6 is added into the inside of the ball mill and ground with the same parameters as in step S7. After grinding is completed, mixed raw material C is obtained.

[0039] S9: Thoroughly mix the mixed raw material C obtained in step S8 and the mixed raw material B obtained in step S4 in the mixing equipment;

[0040] S10: After the mixing process in step S9 is completed, the mixture is removed, and then the entire autoclaved aerated concrete brick production batching process is completed.

[0041] In step S2, the speed of the ball mill is controlled at 1400 r / min, and the grinding time is 150 min.

[0042] In step S3, the speed of the ball mill is controlled at 1500 r / min, and the grinding time is 180 min.

[0043] In step S4, the mixing temperature of the mixer is controlled at 150 degrees Celsius, and the mixing time is 60 minutes.

[0044] In step S5, the foaming agent is a mixture of sodium dodecylbenzenesulfonate, dodecenylsuccinamide ammonium acetate, and dodecyl alcohol, and the weight ratio of sodium dodecylbenzenesulfonate, dodecenylsuccinamide ammonium acetate, and dodecyl alcohol is 7:9:1.

[0045] In step S5, the wear-resistant agent is one of sodium alginate, PEEK resin powder, or mica powder.

[0046] In step S5, the dispersant is bamboo pulp lignin.

[0047] In step S6, the mixing temperature of the mixer is controlled at 200 degrees Celsius, the mixing time is 60 minutes, and the stirring speed during mixing is 500 r / min.

[0048] In step S7, the speed of the ball mill is controlled at 1000 r / min, and the grinding time is 180 min.

[0049] In step S10, when mixing in the stirring equipment, the temperature is controlled at 50-60℃, the mixing time is 30 minutes, and the mixing speed is 500 r / min.

[0050] In this invention, secondary acid-washed brown corundum, primary alum, and dense white corundum are added to the raw materials for autoclaved aerated concrete (AAC) brick production. This improves the impact resistance of the resulting AAC bricks and makes their surface smoother and more aesthetically pleasing, thereby enhancing the overall appearance and durability of the bricks during use. Furthermore, the addition of calcium lignosulfonate solution to these raw materials promotes phase transformation and sintering, reducing firing time and increasing firing speed. This allows the method to be suitable for larger-scale firing, improving economic efficiency.

[0051] Example 2:

[0052] A batching process for producing autoclaved aerated concrete (AAC) bricks, comprising the following steps:

[0053] S1: Prepare the anti-seismic strengthening powder by weighing 100 parts by weight of secondary acid-washed brown fused alumina, 80 parts by weight of ordinary brown fused alumina, 100 parts by weight of andalusite, 100 parts by weight of special grade bauxite, 80 parts by weight of first grade bauxite and 100 parts by weight of dense white fused alumina.

[0054] S2: Add the sub-acid-washed brown fused alumina, ordinary brown fused alumina and andalusite weighed in step S1 into the inside of the pulverizing ball mill A and grind them. After grinding, the premixed powder is obtained for later use.

[0055] S3: Add parts by weight of premium bauxite, parts by weight of first-grade bauxite and parts by weight of dense white corundum to the raw material ground in step S2, and add 100 parts of sillimanite at the same time. Continue grinding. After grinding, autoclaved aerated concrete brick material A is obtained for later use.

[0056] S4: Measure 1000 parts of calcium lignosulfonate solution, take it to a mixer, add the autoclaved aerated concrete brick batch A obtained in step S3 into the mixer, and then add 500 parts of calcium lignosulfonate solution into the mixer to obtain mixed raw material B.

[0057] S5: Prepare anti-corrosion powder by weighing 150 parts of cement, 120 parts of tailings powder, 80 parts of lime, 130 parts of riverbed silt and sand, 360 parts of water, 15 parts of steel slag from steelmaking plant, 10-15 parts of foaming agent, 14-23 parts of wear-resistant agent, 8 parts of dispersant and 11 parts of polypropylene fiber.

[0058] S6: After weighing out cement, tailings powder, lime, riverbed silt and sand, and water, add them into the mixer and start stirring to obtain a mixture for later use.

[0059] S7: Add the steel slag, foaming agent, wear-resistant agent, dispersant and polypropylene fiber weighed in step S5 into the inside of the grinding ball mill and grind them.

[0060] S8: After grinding is completed, the mixture from step S6 is added into the inside of the ball mill and ground with the same parameters as in step S7. After grinding is completed, mixed raw material C is obtained.

[0061] S9: Thoroughly mix the mixed raw material C obtained in step S8 and the mixed raw material B obtained in step S4 in the mixing equipment;

[0062] S10: After the mixing process in step S9 is completed, the mixture is removed, and then the entire autoclaved aerated concrete brick production batching process is completed.

[0063] In step S2, the speed of the ball mill is controlled at 1400 r / min, and the grinding time is 150 min.

[0064] In step S3, the speed of the ball mill is controlled at 1500 r / min, and the grinding time is 180 min.

[0065] In step S4, the mixing temperature of the mixer is controlled at 150 degrees Celsius, and the mixing time is 60 minutes.

[0066] In step S5, the foaming agent is a mixture of sodium dodecylbenzenesulfonate, dodecenylsuccinamide ammonium acetate, and dodecyl alcohol, and the weight ratio of sodium dodecylbenzenesulfonate, dodecenylsuccinamide ammonium acetate, and dodecyl alcohol is 7:9:1.

[0067] In step S5, the wear-resistant agent is one of sodium alginate, PEEK resin powder, or mica powder.

[0068] In step S5, the dispersant is bamboo pulp lignin.

[0069] In step S6, the mixing temperature of the mixer is controlled at 200 degrees Celsius, the mixing time is 60 minutes, and the stirring speed during mixing is 500 r / min.

[0070] In step S7, the speed of the ball mill is controlled at 1000 r / min, and the grinding time is 180 min.

[0071] In step S10, when mixing in the stirring equipment, the temperature is controlled at 50-60℃, the mixing time is 30 minutes, and the mixing speed is 500 r / min.

[0072] In this invention, secondary acid-washed brown corundum, primary alum, and dense white corundum are added to the raw materials for autoclaved aerated concrete (AAC) brick production. This improves the impact resistance of the resulting AAC bricks and makes their surface smoother and more aesthetically pleasing, thereby enhancing the overall appearance and durability of the bricks during use. Furthermore, the addition of calcium lignosulfonate solution to these raw materials promotes phase transformation and sintering, reducing firing time and increasing firing speed. This allows the method to be suitable for larger-scale firing, improving economic efficiency.

[0073] In this invention, the addition of wear-resistant agents to the anti-corrosion powder can improve the corrosion resistance and wear resistance of concrete bricks, thereby increasing their normal service life. Polypropylene fibers can improve the tensile strength of concrete bricks, making them less prone to breakage during normal use, thus improving the overall mechanical strength of the bricks and increasing their service life and durability.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A batching process for the production of autoclaved aerated concrete (AAC) bricks, characterized in that: The production process for autoclaved aerated concrete (AAC) bricks includes the following steps: S1: Prepare the seismic-resistant strengthening powder by weighing 100-120 parts by weight of secondary acid-washed brown fused alumina, 80-100 parts by weight of ordinary brown fused alumina, 100-120 parts by weight of andalusite, 100-120 parts by weight of extra-grade bauxite, 80-100 parts by weight of first-grade bauxite, and 100-120 parts by weight of dense white fused alumina. S2: Add the sub-acid-washed brown fused alumina, ordinary brown fused alumina and andalusite weighed in step S1 into the inside of the grinding ball mill A and grind them. After grinding, the premixed powder is obtained for later use. S3: Add premium bauxite, first-grade bauxite and dense white corundum to the raw material ground in step S2, and simultaneously add 100-120 parts of sillimanite. Continue grinding, and after grinding, obtain autoclaved aerated concrete brick material A for later use. S4: Measure 1000-1200 parts of calcium lignosulfonate solution, take a mixer, add the autoclaved aerated concrete brick batch A obtained in step S3 into the mixer, and then add 500-800 parts of calcium lignosulfonate solution into the mixer to obtain mixed raw material B. S5: Prepare the anti-corrosion powder by weighing 150-170 parts of cement, 120-135 parts of tailings powder, 80-150 parts of lime, 130-145 parts of riverbed silt and sand, 360-380 parts of water, 15-34 parts of steel slag from steel mills, 10-15 parts of foaming agent, 14-23 parts of wear-resistant agent, 8-15 parts of dispersant, and 11-24 parts of polypropylene fiber. S6: Weigh out 150-170 parts of cement, 120-135 parts of tailings powder, 80-150 parts of lime, 130-145 parts of riverbed silt and sand, and 360-380 parts of water and add them into the mixer. Then start stirring to obtain a mixture for later use. S7: Add 15-34 parts of steel slag from the steel plant, 10-15 parts of foaming agent, 14-23 parts of wear-resistant agent, 8-15 parts of dispersant and 11-24 parts of polypropylene fiber weighed in step S5 into the inside of the grinding ball mill and grind them. S8: After grinding is completed, the mixture from step S6 is added into the inside of the ball mill and ground with the same parameters as in step S7. After grinding is completed, mixed raw material C is obtained. S9: Thoroughly mix the mixed raw material C obtained in step S8 and the mixed raw material B obtained in step S4 in the mixing equipment; S10: After the mixing process in step S9 is completed, the mixture is removed, and then the entire autoclaved aerated concrete brick production batching process can be ended. In step S2, the speed of the ball mill is controlled at 1400 r / min, and the grinding time is 150 min. In step S3, the speed of the ball mill is controlled at 1500 r / min, and the grinding time is 180 min. In step S4, the mixing temperature of the mixer is controlled at 150 degrees Celsius, and the mixing time is 60 minutes. In step S5, the foaming agent is a mixture of sodium dodecylbenzenesulfonate, dodecenylsuccinamide ammonium acetate, and dodecyl alcohol, and the weight ratio of sodium dodecylbenzenesulfonate, dodecenylsuccinamide ammonium acetate, and dodecyl alcohol is 7:9:

1. In step S5, the wear-resistant agent is one of sodium alginate, PEEK resin powder, or mica powder. In step S5, the dispersant is bamboo pulp lignin.

2. The batching process for producing autoclaved aerated concrete bricks as described in claim 1, characterized in that: In step S6, the mixing temperature of the mixer is controlled at 200 degrees Celsius, the mixing time is 60 minutes, and the stirring speed during mixing is 500 r / min.

3. The batching process for producing autoclaved aerated concrete bricks as described in claim 1, characterized in that: In step S7, the speed of the ball mill is controlled at 1000 r / min, and the grinding time is 180 min.

4. The batching process for producing autoclaved aerated concrete bricks as described in claim 1, characterized in that: In step S10, when mixing in the stirring equipment, the temperature is controlled at 50~60℃, the mixing time is 30min, and the mixing speed is 500r / min.