Method for preparing brick sculpture by using manganese slag and prepared brick sculpture

Abstract

The invention discloses a method for preparing a brick sculpture by using manganese slag and the prepared brick sculpture, and the method comprises the following steps: respectively fusing and uniformly stirring a first brick sculpture raw material and a second brick sculpture raw material which take cement as a base material, and then introducing the first brick sculpture raw material into a silica gel mold with a gypsum outer mold; the first brick carving raw material is added until the first brick carving raw material completely covers the carving part of the brick carving and is 1.0-2.5 cm higher than the carving part of the brick carving, then the second brick carving raw material is poured into the silica gel mold until the second brick carving raw material reaches the design position of the silica gel mold, redundant bubbles are discharged, after the first brick carving raw material and the second brick carving raw material in the silica gel mold are naturally dried, demolding is conducted, and the brick carving prepared from the manganese slag is obtained, the first brick carving raw material and the second brick carving raw material are both added with modified electrolytic manganese residues as aggregates. The invention provides a new direction for innocent treatment and resource utilization of the electrolytic manganese residues.

Description

Technical Field

[0001] The invention relates to the technical field of brick carving production, in particular to a method for preparing brick carving by utilizing manganese slag and the prepared brick carving. Background Art

[0002] Brick carving is a folk art in my country with a long history. Its works are colorful and surprising, and are deeply loved by the public. The traditional brick carving production process includes: firing and grinding, squaring, cutting, carving, and installation. Each process requires a lot of labor. A brick carving may take more than a dozen days or even one or two hundred days to carve and polish, which is very inefficient.

[0003] The invention patent application CN117621226A discloses an efficient preparation method for brick carvings, which can efficiently obtain mother embryo samples (fine embryo samples) with fine carving patterns, which can greatly improve the preparation efficiency of mother embryo samples; and combined with mold production (mold replication), a large number of brick carving products can be prepared in a short time, achieving efficient and high-quality output of brick carvings; and the brick carving raw materials with cement as the base material have excellent rigidity and waterproofness through reasonable raw material composition, and the service life of the brick carvings is greatly improved.

[0004] Electrolytic manganese slag is an acidic filter residue produced during electrolysis of manganese, which contains a large amount of harmful substances. In recent years, with the rapid development of my country's metallurgy, aerospace, chemical industry and other industries, the demand for electrolytic manganese has increased. Guangxi is one of the important production areas of electrolytic manganese. How to solve the harmless treatment and resource utilization of electrolytic manganese slag has become a hot topic in social research. However, there has been no relevant report on the application of electrolytic manganese slag in brick carving. Summary of the invention

[0005] The invention discloses a method for preparing brick carving by utilizing manganese slag and the prepared brick carving. The electrolytic manganese slag can be modified to be used as aggregate of the brick carving, thereby providing a new direction for the harmless treatment and resource utilization of the electrolytic manganese slag.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] A method for preparing brick carvings using manganese slag comprises the following steps: after respectively blending and mixing a first brick carving raw material and a second brick carving raw material with cement as a base material, the first brick carving raw material is first introduced into a silicone mold with a gypsum outer mold, the first brick carving raw material is added to a height that completely covers the carved part of the brick carving and is 1.0 to 2.5 cm higher, and then the second brick carving raw material is poured into the silicone mold until it reaches the designed position of the silicone mold, and excess bubbles are discharged, and after the first brick carving raw material and the second brick carving raw material in the silicone mold are naturally dried, demolding is performed, and the brick carving is prepared using the manganese slag;

[0008] The first brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 25-30 parts of cement, 6-10 parts of modified electrolytic manganese slag, 1-2 parts of electrolytic manganese slag modified proppant, 0.5-1 part of iron oxide powder, 0.5-0.7 parts of hollow microspheres, 0.03-0.04 parts of polypropylene fiber, and 0.01-0.02 parts of retarder;

[0009] The second brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 25-30 parts of cement, 7-12 parts of modified electrolytic manganese slag, 0.5-1 part of iron oxide powder, 0.2-0.4 parts of hollow microspheres, 0.005-0.01 parts of expansion agent, 0.03-0.04 parts of polypropylene fiber, and 0.01-0.02 parts of retarder.

[0010] Preferably, the preparation method of the modified electrolytic manganese slag comprises the following steps: S1. Weighing electrolytic manganese slag, dolomite, calcium oxide and a binder, wherein the weight ratio of the electrolytic manganese slag, dolomite, calcium oxide and the binder is 10-15:2-3:1-1.5:1, and crushing the electrolytic manganese slag and dolomite; S2. Mixing the crushed electrolytic manganese slag and dolomite with calcium oxide and a binder, and performing three-stage calcination, wherein the calcination temperature of the first stage is 600-650°C, and the calcination time is 20-40 min; the calcination temperature of the second stage is 750-850°C, and the calcination time is 40-70 min; the calcination temperature of the third stage is 1100-1250°C, and the calcination time is 60-80 min; after the calcination is complete, the calcination is allowed to cool naturally, and then the calcination is performed to obtain the modified electrolytic manganese slag.

[0011] Preferably, the binder is at least one of clay, bentonite, kaolin and metakaolin.

[0012] Preferably, the modified electrolytic manganese slag is composed of fine modified electrolytic manganese slag and coarse modified electrolytic manganese slag, and the weight ratio of the fine modified electrolytic manganese slag to the coarse modified electrolytic manganese slag is 2:1-3, wherein the particle size of the fine modified electrolytic manganese slag is 0.5-1.5 mm, and the particle size of the coarse modified electrolytic manganese slag is 2.0-3.5 mm.

[0013] Preferably, the preparation method of the electrolytic manganese slag modified proppant comprises the following steps: (1) weighing modified electrolytic manganese slag, metakaolin and NaOH, wherein the weight ratio of modified electrolytic manganese slag, metakaolin and NaOH is 5-10:20-30:30-35; (2) dissolving NaOH in water, uniformly mixing the modified electrolytic manganese slag and metakaolin, and adding them to the NaOH aqueous solution to prepare a mixed slurry with a viscosity of 5000-6000 mPa·s, and then pouring the mixed slurry into dimethylsiloxane under high-speed stirring to disperse it into spheres, stopping stirring after it solidifies, separating the solid, and obtaining an electrolytic manganese slag modified proppant precursor; (3) steam curing the electrolytic manganese slag modified proppant precursor at 150-180° C. for 4-8 hours to obtain the electrolytic manganese slag modified proppant.

[0014] Preferably, in step (2), the stirring speed of dimethylsiloxane is 700-800 r / min and the temperature is 70-80°C.

[0015] Preferably, the polypropylene fibers are composed of a mixture of short polypropylene fibers, medium polypropylene fibers and long polypropylene fibers, the weight ratio of the short polypropylene fibers, the medium polypropylene fibers and the long polypropylene fibers is 3 to 5:1 to 2:1, the length of the short polypropylene fibers is 1.5 to 3 mm, the length of the medium polypropylene fibers is 6 to 10 mm, and the length of the long polypropylene fibers is 15 to 20 mm.

[0016] Preferably, the specific gravity of the second brick carving raw material is greater than or equal to the specific gravity of the first brick carving raw material.

[0017] The present invention also provides a brick carving prepared by the method for preparing a brick carving by utilizing manganese slag.

[0018] The above-mentioned method for preparing brick carving using manganese slag has the following advantages:

[0019] (1) The present invention uses the modified electrolytic manganese slag for making brick carvings, effectively achieving harmless treatment and resource utilization of manganese slag.

[0020] (2) The present invention modifies the electrolytic manganese slag. First, the ammonia nitrogen substances and calcium oxide in the electrolytic manganese slag react with water at low temperature to generate ammonia gas and discharge it, thereby removing the ammonia nitrogen substances in the electrolytic manganese slag. The slag is then further calcined with dolomite at high temperature to allow manganese ions to react with alkaline oxides to solidify the manganese ions. At the same time, the gas generated by the calcination of dolomite is used to generate pores in the sintered mixture, thereby making the obtained brick carving have better compressive resistance and durability.

[0021] (3) The carved part of the brick carving is often prone to cracks or even collapse due to its small thickness and width. The present invention also introduces an electrolytic manganese slag modified proppant, constructs a three-dimensional grid gelling system with a geological polymer metakaolin, and combines the modified electrolytic manganese slag to fill the pores of the gelling system, thereby further improving the supporting performance of the electrolytic manganese slag modified proppant. At the same time, since the electrolytic manganese slag modified proppant is in a relatively good spherical shape, it can also help the first brick carving raw material to better guide into the gap of the silicone mold corresponding to the carved part of the brick carving, thereby making the brick carving more delicate and beautiful. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] A method for preparing brick carvings using manganese slag comprises the following steps: after respectively blending and mixing a first brick carving raw material and a second brick carving raw material with cement as a base material, the first brick carving raw material is first introduced into a silicone mold with a gypsum outer mold, the first brick carving raw material is added to a height to completely cover the carved part of the brick carving and is 1.0 to 2.5 cm (such as 1 cm, 1.5 cm, 2.0 cm or 2.5 cm) higher, and then the second brick carving raw material is poured into the silicone mold until it reaches the designed position of the silicone mold, and excess bubbles are discharged, and after the first brick carving raw material and the second brick carving raw material in the silicone mold are naturally dried, demolding is performed, and the brick carving is prepared using manganese slag;

[0025] The first brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 25-30 parts of cement, 6-10 parts of modified electrolytic manganese slag, 1-2 parts of electrolytic manganese slag modified proppant, 0.5-1 part of iron oxide powder, 0.5-0.7 parts of hollow microspheres, 0.03-0.04 parts of polypropylene fiber, and 0.01-0.02 parts of retarder;

[0026] The second brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 25-30 parts of cement, 7-12 parts of modified electrolytic manganese slag, 0.5-1 part of iron oxide powder, 0.2-0.4 parts of hollow microspheres, 0.005-0.01 parts of expansion agent, 0.03-0.04 parts of polypropylene fiber, and 0.01-0.02 parts of retarder.

[0027] The brick carving mainly used in the present invention consists of a carving part and a solid part. The silicone of the silicone mold is located at the bottom, which is designed to be in the shape of the carving part. The top of the carving part corresponds to the solid part. The first brick carving material is used for the lower part of the carving part and the solid part (the height is 0.5 to 2.5 cm), and the second brick carving material is used for the middle and upper part of the solid part, which is more conducive to reducing costs.

[0028] Preferably, the preparation method of the modified electrolytic manganese slag comprises the following steps: S1. weighing electrolytic manganese slag, dolomite, calcium oxide and a binder, wherein the weight ratio of the electrolytic manganese slag, dolomite, calcium oxide and the binder is 10-15:2-3:1-1.5:1 (such as 10:2:1:1, 10:3:1.5:1, 12:2:1:1, 13:3:1.5:1, 15:3:1:1 or 15:3:1.5:1), and crushing the electrolytic manganese slag and dolomite; S2. mixing the crushed electrolytic manganese slag and dolomite with calcium oxide and a binder, and calcining them in three stages, wherein the calcination temperature in the first stage is 600-650°C (such as 600°C, 620°C, 640°C or 650°C); ), the calcination time is 20-40min (such as 20min, 30min, 35min or 40min), the temperature of the second stage calcination is 750-850℃ (such as 750℃, 800℃, 820℃ or 850℃), the calcination time is 40-70min (such as 40min, 50min, 60min or 70min), the temperature of the third stage calcination is 1100-1250℃ (such as 1100℃, 1180℃, 1220℃ or 1250℃), the calcination time is 60-80min (such as 60min, 70min, 75min or 80min), after the calcination is complete, it is naturally cooled and crushed to obtain the modified electrolytic manganese slag.

[0029] More preferably, in the above step S1, the particle size of the electrolytic manganese slag and dolomite is preferably 0.5-5 mm (such as 0.5 mm, 1 mm, 3 mm or 5 mm).

[0030] More preferably, in the above step S2, the heating rate from the first stage to the second stage is 150-200°C / h (such as 150°C / h, 180°C / h, 190°C / h or 200°C / h), and the heating rate from the second stage to the third stage is 200-350°C / h (such as 200°C / h, 250°C / h, 300°C / h or 350°C / h).

[0031] Preferably, the modified electrolytic manganese slag is composed of fine modified electrolytic manganese slag and coarse modified electrolytic manganese slag, and the weight ratio of the fine modified electrolytic manganese slag to the coarse modified electrolytic manganese slag is 2:1-3 (such as 2:1, 2:2, 2:2.5 or 2:3), wherein the particle size of the fine modified electrolytic manganese slag is 0.5-1.5 mm (such as 0.5 mm, 1.0 mm, 1.2 mm or 1.5 mm), and the particle size of the coarse modified electrolytic manganese slag is 2.0-3.5 mm (such as 2.0 mm, 2.5 mm, 3.0 mm or 3.5 mm).

[0032] Preferably, the preparation method of the electrolytic manganese slag modified proppant comprises the following steps: (1) weighing modified electrolytic manganese slag, metakaolin and NaOH, wherein the weight ratio of modified electrolytic manganese slag, metakaolin and NaOH is 5-10:20-30:30-35 (such as 5:20:30, 5:30:30, 10:20:35, 10:30:35 or 8:25:32); (2) dissolving NaOH in water, mixing the modified electrolytic manganese slag and metakaolin uniformly, and adding them to the NaOH aqueous solution to prepare a proppant with a viscosity of 5000-6000 mPa·s (such as 5 000mPa·s, 5200mPa·s, 5500mPa·s or 6000mPa·s), then pouring the mixed slurry into dimethylsiloxane under high-speed stirring to disperse it into spheres, stopping stirring after it solidifies, separating the solid, and obtaining an electrolytic manganese slag modified proppant precursor; (3) steam curing the electrolytic manganese slag modified proppant precursor at 150-180° C. (such as 150° C., 160° C., 165° C. or 180° C.) for 4-8 h (such as 4 h, 6 h, 7 h or 8 h) to obtain the electrolytic manganese slag modified proppant.

[0033] More preferably, when used, the particle size of the electrolytic manganese slag modified proppant is controlled to be less than 0.5 mm.

[0034] Preferably, in step (2), the stirring speed of dimethylsiloxane is 700-800 r / min and the temperature is 70-80°C.

[0035] Preferably, the polypropylene fibers are composed of a mixture of short polypropylene fibers, medium polypropylene fibers and long polypropylene fibers, the weight ratio of the short polypropylene fibers, the medium polypropylene fibers and the long polypropylene fibers is 3 to 5:1 to 2:1, the length of the short polypropylene fibers is 1.5 to 3 mm, the length of the medium polypropylene fibers is 6 to 10 mm, and the length of the long polypropylene fibers is 15 to 20 mm.

[0036] Preferably, the specific gravity of the second brick carving material is greater than or equal to the specific gravity of the first brick carving material. If the specific gravity of the second brick carving material is greater than the specific gravity of the first brick carving material, the difference is controlled within 0.02-0.1 g / cm3 The specific gravity can be achieved by adjusting the amount of hollow microspheres.

[0037] Some specific embodiments are provided below to further illustrate the present invention.

[0038] The composition of the electrolytic manganese slag used in this embodiment is shown in Table 1:

[0039] Table 1 Composition of electrolytic manganese slag

[0040]

[0041] Before pouring the brick carving, the specific steps of this embodiment refer to steps S1 to S3 of CN117621226A. Similarly, after the brick carving is demoulded, it can be colored according to specific needs. The expansion agent used in this embodiment is an expansion agent mainly composed of iron powder and aluminum powder, and the retarder is a lignin sulfonate retarder.

[0042] Example 1

[0043] A method for preparing brick carvings by using manganese slag comprises the following steps: after respectively blending and evenly mixing a first brick carving raw material and a second brick carving raw material with cement as a base material, firstly introducing the first brick carving raw material into a silicone mold with a gypsum outer mold, adding the first brick carving raw material to a height that completely covers the carved part of the brick carving and is 2 cm higher, then pouring the second brick carving raw material into the silicone mold until it reaches the designed position of the silicone mold, discharging excess bubbles, and after the first brick carving raw material and the second brick carving raw material in the silicone mold are naturally dried, demolding is performed, and the brick carvings can be prepared by using manganese slag.

[0044] The first brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 28 parts of cement, 8 parts of modified electrolytic manganese slag, 1.5 parts of electrolytic manganese slag modified proppant, 0.8 parts of iron oxide powder, 0.6 parts of hollow microspheres, 0.03 parts of polypropylene fiber, and 0.012 parts of retarder; the amount of water used is 15% of the amount of the above raw materials.

[0045] The second brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 28 parts of cement, 9.8 parts of modified electrolytic manganese slag, 0.8 parts of iron oxide powder, 0.3 parts of hollow microspheres, 0.005 parts of expansion agent, 0.03 parts of polypropylene fiber, and 0.01 parts of retarder; the amount of water used is 15% of the amount of the above raw materials.

[0046] Preferably, the preparation method of modified electrolytic manganese slag comprises the following steps: S1. Weigh electrolytic manganese slag, dolomite, calcium oxide and clay, the weight ratio of electrolytic manganese slag, dolomite, calcium oxide and clay is 13:2.5:1.2:1, crush the electrolytic manganese slag and dolomite, and the particle size is 0.5-3 mm; S2. Mix the crushed electrolytic manganese slag and dolomite with calcium oxide and clay, and carry out three-stage calcination, the calcination temperature of the first stage is 630-640°C, the calcination time is 30min, the calcination temperature of the second stage is 820-830°C, the calcination time is 60min, the calcination temperature of the third stage is 1150-1160°C, the calcination time is 75min, after calcination is complete, wait for it to cool naturally, and crush to obtain modified electrolytic manganese slag.

[0047] The modified electrolytic manganese slag is composed of fine modified electrolytic manganese slag and coarse modified electrolytic manganese slag, and the weight ratio of the fine modified electrolytic manganese slag to the coarse modified electrolytic manganese slag is 2:1.5, wherein the particle size of the fine modified electrolytic manganese slag is 0.5-1.5mm, and the particle size of the coarse modified electrolytic manganese slag is 2.0-3.5mm.

[0048] The preparation method of electrolytic manganese slag modified proppant comprises the following steps: (1) weighing modified electrolytic manganese slag, metakaolin and NaOH, wherein the weight ratio of modified electrolytic manganese slag, metakaolin and NaOH is 8:28:33; (2) dissolving NaOH in water, uniformly mixing the modified electrolytic manganese slag and metakaolin, and adding the mixture into a NaOH aqueous solution to prepare a mixed slurry with a viscosity of 5500 mPa·s, and then pouring the mixed slurry into dimethylsiloxane under high-speed stirring to disperse the spherical slurry, stopping stirring after the slurry is solidified, separating the solid, and obtaining an electrolytic manganese slag modified proppant precursor; and (3) steam curing the electrolytic manganese slag modified proppant precursor at 160° C. for 7 hours to obtain an electrolytic manganese slag modified proppant.

[0049] Wherein, in step (2), the stirring speed of dimethylsiloxane is 750 r / min and the temperature is 80°C.

[0050] The polypropylene fiber is composed of a mixture of short polypropylene fiber, medium polypropylene fiber and long polypropylene fiber, the weight ratio of the short polypropylene fiber, the medium polypropylene fiber and the long polypropylene fiber is 4:1.5:1, the length of the short polypropylene fiber is 3 mm, the length of the medium polypropylene fiber is 9 mm, and the length of the long polypropylene fiber is 18 mm.

[0051] Example 2

[0052] A method for preparing brick carvings by using manganese slag comprises the following steps: after respectively blending and evenly mixing a first brick carving raw material and a second brick carving raw material with cement as a base material, firstly introducing the first brick carving raw material into a silicone mold with a gypsum outer mold, adding the first brick carving raw material to a height that completely covers the carved part of the brick carving and is 2 cm higher, then pouring the second brick carving raw material into the silicone mold until it reaches the designed position of the silicone mold, discharging excess bubbles, and after the first brick carving raw material and the second brick carving raw material in the silicone mold are naturally dried, demolding is performed, and the brick carvings can be prepared by using manganese slag.

[0053] The first brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 27 parts of cement, 6 parts of modified electrolytic manganese slag, 1 part of electrolytic manganese slag modified proppant, 0.5 parts of iron oxide powder, 0.5 parts of hollow microspheres, 0.04 parts of polypropylene fiber, and 0.02 parts of retarder; the amount of water used is 16% of the amount of the above raw materials.

[0054] The second brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 27 parts of cement, 7.3 parts of modified electrolytic manganese slag, 0.5 parts of iron oxide powder, 0.2 parts of hollow microspheres, 0.005 parts of expansion agent, 0.04 parts of polypropylene fiber, and 0.018 parts of retarder; the amount of water used is 16% of the amount of the above raw materials.

[0055] Preferably, the preparation method of modified electrolytic manganese slag comprises the following steps: S1. Weigh electrolytic manganese slag, dolomite, calcium oxide and clay, the weight ratio of electrolytic manganese slag, dolomite, calcium oxide and clay is 15:3:1:1, and crush the electrolytic manganese slag and dolomite to a particle size of 0.5 to 3 mm; S2. Mix the crushed electrolytic manganese slag and dolomite with calcium oxide and clay, and perform three-stage calcination, the calcination temperature of the first stage is 640 to 650°C, the calcination time is 40 min, the calcination temperature of the second stage is 840 to 850°C, the calcination time is 50 min, the calcination temperature of the third stage is 1240 to 1250°C, the calcination time is 70 min, and after calcination is complete, wait for it to cool naturally and crush it to obtain modified electrolytic manganese slag.

[0056] The modified electrolytic manganese slag is composed of fine modified electrolytic manganese slag and coarse modified electrolytic manganese slag, and the weight ratio of the fine modified electrolytic manganese slag to the coarse modified electrolytic manganese slag is 2:1, wherein the particle size of the fine modified electrolytic manganese slag is 0.5-1.5mm, and the particle size of the coarse modified electrolytic manganese slag is 2.0-3.0mm.

[0057] The preparation method of electrolytic manganese slag modified proppant comprises the following steps: (1) weighing modified electrolytic manganese slag, metakaolin and NaOH, wherein the weight ratio of modified electrolytic manganese slag, metakaolin and NaOH is 5:20:30; (2) dissolving NaOH in water, uniformly mixing the modified electrolytic manganese slag and metakaolin, and adding the mixture into a NaOH aqueous solution to prepare a mixed slurry with a viscosity of 5000 mPa·s, and then pouring the mixed slurry into dimethylsiloxane under high-speed stirring to disperse the spherical slurry, stopping stirring after the spherical slurry is solidified, separating the solid, and obtaining an electrolytic manganese slag modified proppant precursor; and (3) steam curing the electrolytic manganese slag modified proppant precursor at 150° C. for 8 hours to obtain an electrolytic manganese slag modified proppant.

[0058] Wherein, in step (2), the stirring speed of dimethylsiloxane is 800 r / min and the temperature is 75°C.

[0059] The polypropylene fibers are mixed with short polypropylene fibers, medium polypropylene fibers and long polypropylene fibers, the weight ratio of the short polypropylene fibers, the medium polypropylene fibers and the long polypropylene fibers is 5:2:1, the length of the short polypropylene fibers is 3 mm, the length of the medium polypropylene fibers is 6 mm, and the length of the long polypropylene fibers is 15 mm.

[0060] Example 3

[0061] A method for preparing brick carvings by using manganese slag comprises the following steps: after respectively blending and evenly mixing a first brick carving raw material and a second brick carving raw material with cement as a base material, firstly introducing the first brick carving raw material into a silicone mold with a gypsum outer mold, adding the first brick carving raw material to a height that completely covers the carved part of the brick carving and is 2 cm higher, then pouring the second brick carving raw material into the silicone mold until it reaches the designed position of the silicone mold, discharging excess bubbles, and after the first brick carving raw material and the second brick carving raw material in the silicone mold are naturally dried, demolding is performed, and the brick carvings can be prepared by using manganese slag.

[0062] The first brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 30 parts of cement, 9 parts of modified electrolytic manganese slag, 2 parts of electrolytic manganese slag modified proppant, 0.5 parts of iron oxide powder, 0.7 parts of hollow microspheres, 0.03 parts of polypropylene fiber, and 0.02 parts of retarder; the amount of water used is 16% of the amount of the above raw materials.

[0063] The second brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 30 parts of cement, 11.3 parts of modified electrolytic manganese slag, 0.5 parts of iron oxide powder, 0.4 parts of hollow microspheres, 0.005 parts of expansion agent, 0.03 parts of polypropylene fiber, and 0.018 parts of retarder; the amount of water used is 16% of the amount of the above raw materials.

[0064] Preferably, the preparation method of modified electrolytic manganese slag comprises the following steps: S1. Weigh electrolytic manganese slag, dolomite, calcium oxide and clay, the weight ratio of electrolytic manganese slag, dolomite, calcium oxide and clay is 10:2:1:1, and crush the electrolytic manganese slag and dolomite to a particle size of 0.5 to 3 mm; S2. Mix the crushed electrolytic manganese slag and dolomite with calcium oxide and clay, and perform three-stage calcination, the calcination temperature of the first stage is 600 to 605°C, the calcination time is 30 min, the calcination temperature of the second stage is 750 to 760°C, the calcination time is 70 min, the calcination temperature of the third stage is 1100 to 1105°C, the calcination time is 80 min, after calcination is complete, wait for it to cool naturally, and crush to obtain modified electrolytic manganese slag.

[0065] The modified electrolytic manganese slag consists of fine modified electrolytic manganese slag and coarse modified electrolytic manganese slag, the weight ratio of the fine modified electrolytic manganese slag to the coarse modified electrolytic manganese slag is 2:3, wherein the particle size of the fine modified electrolytic manganese slag is 0.5-1.5mm, and the particle size of the coarse modified electrolytic manganese slag is 2.0-3.0mm.

[0066] The preparation method of electrolytic manganese slag modified proppant comprises the following steps: (1) weighing modified electrolytic manganese slag, metakaolin and NaOH, wherein the weight ratio of modified electrolytic manganese slag, metakaolin and NaOH is 10:30:35; (2) dissolving NaOH in water, uniformly mixing the modified electrolytic manganese slag and metakaolin, and adding the mixture into a NaOH aqueous solution to prepare a mixed slurry with a viscosity of 5300 mPa·s, and then pouring the mixed slurry into dimethylsiloxane under high-speed stirring to disperse the spherical slurry, stopping stirring after the slurry is solidified, separating the solid, and obtaining an electrolytic manganese slag modified proppant precursor; and (3) steam curing the electrolytic manganese slag modified proppant precursor at 150° C. for 8 hours to obtain an electrolytic manganese slag modified proppant.

[0067] Wherein, in step (2), the stirring speed of dimethylsiloxane is 800 r / min and the temperature is 75°C.

[0068] The polypropylene fiber is composed of a mixture of short polypropylene fiber, medium polypropylene fiber and long polypropylene fiber, the weight ratio of the short polypropylene fiber, the medium polypropylene fiber and the long polypropylene fiber is 3:2:1, the length of the short polypropylene fiber is 3mm, the length of the medium polypropylene fiber is 6mm, and the length of the long polypropylene fiber is 15mm.

[0069] Comparative Example 1

[0070] Compared with Example 1, Comparative Example 1 only uses the second brick carving raw material to introduce into the silicone mold, and does not use the first brick carving raw material, and the others are the same.

[0071] Comparative Example 2

[0072] Comparative Example 1 Compared with Example 1, the preparation method of the modified electrolytic manganese slag is adjusted, and the others are the same. The preparation method of the modified electrolytic manganese slag comprises the following steps: S1. Weighing electrolytic manganese slag, calcium oxide, magnesium oxide and clay, the weight ratio of electrolytic manganese slag, calcium oxide, magnesium oxide and clay is 13:2.5:1.2:1, crushing the electrolytic manganese slag to a particle size of 0.5-3 mm; S2. Mixing the crushed electrolytic manganese slag, calcium oxide, magnesium oxide and clay, and calcining in three stages, the calcination temperature of the first stage is 630-640°C, the calcination time is 30 min, the calcination temperature of the second stage is 820-830°C, the calcination time is 60 min, the calcination temperature of the third stage is 1150-1160°C, the calcination time is 75 min, after calcination is complete, wait for it to cool naturally, and crush to obtain the modified electrolytic manganese slag.

[0073] The brick carvings of Examples 1 to 3 and Comparative Examples 1 to 2 were tested for performance with reference to GB / T 24493-2009 "Decorative Concrete Bricks", where the solid part of the brick carvings was 36 cm long, 24 cm wide, and 11.5 cm high. At the same time, the brick carving leaching test of Examples 1 to 3 and Comparative Examples 1 to 2 was performed with reference to GB / T39804-2021 "Determination of Leachable Harmful Substances in Wall Materials".

[0074] Table 2 Performance test results

[0075]

[0076] Table 3 Leaching test results

[0077]

[0078] Those skilled in the art should note that the embodiments described in the present invention are merely exemplary, and various other substitutions, changes and improvements may be made within the scope of the present invention. Therefore, the present invention is not limited to the above embodiments, but only to the claims.

Claims

1. A method for preparing brick carving using manganese slag, characterized in that The following steps are involved: After respectively blending and mixing a first brick carving raw material and a second brick carving raw material with cement as the base material, the first brick carving raw material is first introduced into a silicone mold with a gypsum outer mold, the first brick carving raw material is added to a height that completely covers the carved part of the brick carving and is 1.0-2.5 cm higher, and then the second brick carving raw material is poured into the silicone mold until it reaches the designed position of the silicone mold, and excess bubbles are discharged. After the first brick carving raw material and the second brick carving raw material in the silicone mold are naturally dried, demolding is performed to prepare brick carving using manganese slag; The first brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 25-30 parts of cement, 6-10 parts of modified electrolytic manganese slag, 1-2 parts of electrolytic manganese slag modified proppant, 0.5-1 parts of iron oxide powder, 0.5-0.7 parts of hollow microspheres, 0.03-0.04 parts of polypropylene fiber, and 0.01-0.02 parts of retarder; The second brick carving raw material is composed of the following raw materials in parts by weight mixed with an appropriate amount of water: 25-30 parts of cement, 7-12 parts of modified electrolytic manganese slag, 0.5-1 parts of iron oxide powder, 0.2-0.4 parts of hollow microspheres, 0.005-0.01 parts of expansion agent, 0.03-0.04 parts of polypropylene fiber, and 0.01-0.02 parts of retarder.

2. The method for preparing brick carving using manganese slag according to claim 1, characterized in that: The preparation method of the modified electrolytic manganese slag comprises the following steps: S1. weighing electrolytic manganese slag, dolomite, calcium oxide and a binder, wherein the weight ratio of the electrolytic manganese slag, dolomite, calcium oxide and the binder is 10-15:2-3:1-1.5:1, and crushing the electrolytic manganese slag and dolomite; S2. mixing the crushed electrolytic manganese slag and dolomite with calcium oxide and a binder, and performing three-stage calcination, wherein the calcination temperature of the first stage is 600-650°C, and the calcination time is 20-40 min; the calcination temperature of the second stage is 750-850°C, and the calcination time is 40-70 min; the calcination temperature of the third stage is 1100-1250°C, and the calcination time is 60-80 min; after the calcination is complete, the calcination is allowed to cool naturally, and then the calcination is performed to obtain the modified electrolytic manganese slag.

3. The method for preparing brick carving using manganese slag according to claim 2, characterized in that: The binder is at least one of clay, bentonite, kaolin and metakaolin.

4. The method for preparing brick carving using manganese slag according to claim 2, characterized in that: The modified electrolytic manganese slag is composed of fine modified electrolytic manganese slag and coarse modified electrolytic manganese slag, and the weight ratio of the fine modified electrolytic manganese slag to the coarse modified electrolytic manganese slag is 2:1~3, wherein the particle size of the fine modified electrolytic manganese slag is 0.5~1.5 mm, and the particle size of the coarse modified electrolytic manganese slag is 2.0~3.5 mm.

5. The method for preparing brick carving using manganese slag according to claim 2, characterized in that: The preparation method of the electrolytic manganese slag modified proppant comprises the following steps: (1) weighing modified electrolytic manganese slag, metakaolin and NaOH, wherein the weight ratio of the modified electrolytic manganese slag, metakaolin and NaOH is 5-10:20-30:30-35; (2) dissolving NaOH in water, uniformly mixing the modified electrolytic manganese slag and metakaolin, and adding the mixture into the NaOH aqueous solution to prepare a mixed slurry with a viscosity of 5000-6000 mPa▪s, and then pouring the mixed slurry into dimethylsiloxane under high-speed stirring to disperse it into spheres, stopping stirring after solidification, separating the solid, and obtaining an electrolytic manganese slag modified proppant precursor; (3) steam curing the electrolytic manganese slag modified proppant precursor at 150-180°C for 4-8 hours to obtain the electrolytic manganese slag modified proppant.

6. The method for preparing brick carving using manganese slag according to claim 5, characterized in that: In step (2), the stirring speed of dimethylsiloxane is 700-800 r / min and the temperature is 70-80 °C.

7. The method for preparing brick carving using manganese slag according to claim 1, characterized in that: The polypropylene fibers are composed of a mixture of short polypropylene fibers, medium polypropylene fibers and long polypropylene fibers, the weight ratio of the short polypropylene fibers, the medium polypropylene fibers and the long polypropylene fibers is 3-5:1-2:1, the length of the short polypropylene fibers is 1.5-3 mm, the length of the medium polypropylene fibers is 6-10 mm, and the length of the long polypropylene fibers is 15-20 mm.

8. The method for preparing brick carving using manganese slag according to claim 1, characterized in that: The specific gravity of the second brick carving raw material is greater than or equal to the specific gravity of the first brick carving raw material.

9. The brick carving obtained by the method for preparing brick carving using manganese slag according to any one of claims 1 to 8.

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