Preparation Method of Synthesizing Anhydrous Calcium Sulphoaluminate Expansion Agent Using Waste Slag from Aluminum Profile Factory

An anhydrous calcium sulfoaluminate and aluminum profile plant technology, applied in the field of cement concrete materials, can solve the problems of environmental pollution threat, sulfate escape, occupation of large land, etc., achieve simple composition of raw materials, avoid sulfur pollution, reduce preparation cost effect

Active Publication Date: 2019-09-20
FUJIAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

The amount of this kind of waste residue is very large. At present, the industrial waste residue discharged by most aluminum profile factories in my country is still simply piled up for disposal, which not only occupies a large amount of land, but also may pose a potential pollution threat to the environment. Therefore, how to safely and effectively dispose of it? This waste residue has attracted the attention of practitioners
Practitioners use aluminum profile factory waste slag as the main raw material for the production of aluminum hydroxide, aluminum chloride, activated alumina, mullite, cordierite, magnesium aluminum spinel, aluminum titanate and other materials, which has certain environmental benefits and economic benefits; however, when the above materials are prepared by high-temperature solid-state reaction method, the sulfate in the waste residue will be SO 2 released into the air, causing secondary pollution

Method used

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  • Preparation Method of Synthesizing Anhydrous Calcium Sulphoaluminate Expansion Agent Using Waste Slag from Aluminum Profile Factory
  • Preparation Method of Synthesizing Anhydrous Calcium Sulphoaluminate Expansion Agent Using Waste Slag from Aluminum Profile Factory

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preparation example Construction

[0027] The present invention utilizes the waste slag of aluminum profile factory to synthesize the preparation method of anhydrous calcium sulfoaluminate expansion agent, and its specific operation steps are as follows:

[0028] (1) Weigh each component according to the following weight ratio: 51-70 parts of aluminum profile factory waste residue, 3-1.5 parts of kaolin, 28.5-46 parts of limestone material or limestone, and weigh each component Mix evenly to get raw materials, set aside;

[0029] (2) Put the obtained raw materials into the grinder, add water and ceramic balls, then start the grinder for grinding, and the mass ratio of raw materials: balls: water is 1:1.4~1.6:0.7~0.9, the grinding time 0.5 to 2 hours; slurry is obtained after grinding;

[0030] (3) Filter and dehydrate the slurry obtained by grinding, then dry at 100°C for 12 hours, then crush and pass through a 100-mesh sieve to obtain powder;

[0031] (4) Mix the obtained powder with the binder, and the mass...

Embodiment 1

[0036]Weigh 51.2 parts by weight of aluminum profile factory waste residue, 2.9 parts by weight of kaolin, and 46 parts by weight of limestone and mix them evenly to obtain the raw materials for later use; put the obtained raw materials into a grinder, add water and agate balls at the same time, and then start the grinder for grinding , and raw material: agate ball: water mass ratio is 1:1.5:0.8, and the grinding time is 0.5 hour; the slurry is obtained after grinding; the slurry obtained by grinding is filtered and dehydrated, and then dried at 100°C for 12 hours, then crushed and passed through a 100 mesh sieve to obtain a powder; the obtained powder is mixed with a polyvinyl alcohol aqueous solution with a mass concentration of 5%, and the mass ratio of the powder to a 5% polyvinyl alcohol aqueous solution is 100 : 2. Compress molding under the pressure of 20MPa to get the molding blank; put the molding blank at 100°C and dry for 12 hours to get the dry embryo; put the dry e...

Embodiment 2

[0039] Weigh 56.7 parts by weight of aluminum profile factory waste residue, 2.9 parts by weight of kaolin, and 40.4 parts by weight of calcium oxide and mix them evenly to obtain the raw materials for later use; put the obtained raw materials into a grinder, add water and agate balls at the same time, and then start the grinder for Grinding, and raw materials: agate ball: water mass ratio is 1:1.5:0.8, grinding time is 0.5 hours; slurry is obtained after grinding; the slurry obtained from grinding is filtered and dehydrated, and then dried at 100°C 12 hours, then crushed and crossed a 100 mesh sieve to obtain a powder; the gained powder was mixed with a 5% polyvinyl alcohol aqueous solution with a mass concentration, and the mass ratio of the powder to a 5% polyvinyl alcohol aqueous solution was 100:2, press molding under the pressure of 20MPa to get the molding blank; dry the molding blank at 100°C for 12 hours to get the dry embryo; place the dry embryo in the kiln and calci...

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Abstract

The invention provides preparation method using aluminum profile factory slag to synthesize an anhydrous calcium sulphoaluminate expanding agent. The preparation method includes: weighing the aluminum profile factory slag, kaolin and limestone materials or limestone, and evenly mixing to obtain a raw material; grinding the raw material for 0.5-2 hours to obtain slurry, wherein the mass ratio of the raw material to spheres to water is 1:(1.4-1.6):(0.7-0.9); filtering and dewatering the slurry, drying, crushing, and sieving to obtain a powder material; mixing the powder material with binder, performing compression molding, and drying a formed base material; placing the dried base material into a kiln, calcining the dried base material under air atmosphere and the calcining temperature of 1310-1370 DEG C, performing heat preservation for 0.5-2 hours, and cooling to room temperature to obtain the anhydrous calcium sulphoaluminate expanding agent. The preparation method has the advantages that the aluminum profile factory slag can be utilized to the maximum extent under the premise that the high-purity anhydrous calcium sulphoaluminate can be obtained, the high-added-value recycling of the aluminum profile factory slag is achieved, and the production cost of the anhydrous calcium sulphoaluminate expanding agent is lowered evidently.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of cement concrete materials, and in particular relates to a preparation method for synthesizing anhydrous calcium sulfoaluminate expansion agent by using waste residue from an aluminum profile factory. [0003] 【Background technique】 [0004] During the pouring and hardening process of concrete, due to chemical shrinkage, cold shrinkage, dry shrinkage and other reasons, volume shrinkage will occur, and its shrinkage value is about 0.04% to 0.06% of its own volume. Leakage damage, steel corrosion caused by cracking, volume instability, etc. These shrinkage cracking damages the volume stability of concrete, thereby affecting its structural function, reducing the durability of concrete and shortening its service life. Shrinkage-compensated concrete, also known as expansive concrete, can be prepared by adding an expansive agent to the concrete. At present, due to its excellent anti-crack and anti-crack properti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14C04B18/14
CPCC04B18/141C04B22/14Y02W30/91
Inventor 花能斌廖振龙陈文哲
Owner FUJIAN UNIV OF TECH
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