阅读说明：本技术 一种污泥炭生产蒸压加气砌块的方法 (Method for producing autoclaved aerated building blocks by using sludge carbon ) 是由 伍贤军 卢归 吴丹 于 2021-08-11 设计创作，主要内容包括：蒸压加气砌块是利用硅质材料(砂或粉煤灰)和氧化钙混合配比,添加石膏、水泥、铝粉发气初凝后,经过高温高压蒸压养护成的建筑材料砌块。随着社会经济的发展,硅质材料(砂或粉煤灰)和氧化钙资源成本及生产成本逐渐上升,蒸压加气砌块生产成本越来越高,也急需新的、成本便宜的原材料替代。因此结合上述二个产业,采用污泥炭替代蒸压加气砌块部分原材料使用,在解决污泥炭产物去向问题的同时降低蒸压加气砌块生产成本,具有双重的经济效益和社会效益。(The autoclaved aerated building block is a building material building block which is prepared by mixing siliceous materials (sand or fly ash) and calcium oxide, adding gypsum, cement and aluminum powder to generate gas for initial setting, and then carrying out high-temperature and high-pressure autoclaved curing. With the development of socioeconomic performance, the resource cost and production cost of siliceous materials (sand or fly ash) and calcium oxide gradually rise, the production cost of autoclaved aerated blocks is higher and higher, and new and cheap raw materials are urgently needed to replace. Therefore, the sludge carbon is adopted to replace part of raw materials of the autoclaved aerated block to be used by combining the two industries, the problem of the sludge carbon product destination is solved, the production cost of the autoclaved aerated block is reduced, and double economic benefits and social benefits are achieved.)

1. A method for producing autoclaved aerated blocks by using sludge carbon is characterized by comprising the following steps: on the basis of analyzing the components of the sewage peat, taking sludge carbon as a raw material, and mixing and proportioning the sludge carbon and siliceous materials (sand or fly ash), lime, cement, gypsum, aluminum powder and other raw materials to prepare an autoclaved aerated block; the sludge carbon adding method is characterized in that two adding modes are set according to different processes of an autoclaved aerated block production line, wherein one adding mode is that sludge carbon particles and siliceous materials (sand or fly ash) are mixed according to a certain proportion and ball-milled to prepare slurry, then cement, lime, gypsum and aluminum powder are added for mixing and pulping, and the mixture enters an autoclave for autoclaved brick making after being molded; the other adding mode is that the sludge carbon is made into powder, and is added into siliceous material (sand or fly ash) slurry with cement, lime, gypsum and aluminum powder according to a proportion, and is stirred and mixed evenly, and then is put into an autoclave for autoclaved brick making after being molded.

2. The method for producing the autoclaved aerated block by using the sludge carbon according to claim 1, which is characterized by comprising the following steps: the proportion of the autoclaved aerated block produced by the sewage peat is as follows: if the calcium oxide in the sludge peat is 30-60%, the sludge peat can replace part of lime to be used as a production raw material, siliceous materials (60-69%), the sludge peat (1-15%), cement (13.8%), lime (5-13.8%), gypsum (2.96%) and aluminium powder (0.4 kg/m)³(ii) a If the content of the silicon dioxide in the sludge carbon is 45-70 percent, the sludge carbon can replace part of siliceous materials for use, and the adding proportion is 50-60 percent of siliceous materials, 1-20 percent of sludge coal, 13.8 percent of cement, 13.8 percent of lime, 2.96 percent of gypsum and 0.4kg/m of aluminum powder³。

Technical Field

The invention relates to the field of sludge resource utilization, in particular to a method for producing autoclaved aerated building blocks by using sludge carbon.

Background

The sludge carbon is a product of sludge pyrolysis carbonization treatment, after water and organic matters in sludge are treated in the sludge pyrolysis carbonization process, the generated sludge carbon mainly takes inorganic matters and carbon as main materials, wherein the inorganic matters account for more than 94 percent, the carbon accounts for less than 6 percent, the sludge carbon has stable performance and no odor, the components are similar to cement mineral components, and the sludge carbon is a good building raw material.

The main components of the peat are inorganic substances, mainly comprising silicon dioxide, calcium oxide, ferric oxide and the like, and the proportion of the carbon components of the peat is different according to different sludge dehydration processes, for example, the dehydrated sludge is conditioned by lime and ferric salt, the inorganic components mainly comprise calcium oxide, and the content of the calcium oxide is 30-60%; if organic medicament is adopted to condition sludge generated by dehydration, inorganic components are mainly silicon dioxide, and the proportion of the silicon dioxide is 45-70%. No matter what kind of conditioner is used for dewatering sludge to produce the sludge, the inorganic components are mainly calcium oxide and silicon dioxide, and the two substances are the main raw materials for producing the autoclaved aerated block.

The autoclaved aerated building block is a building material building block which is prepared by mixing siliceous materials (sand or fly ash) and calcium oxide, adding gypsum, cement and aluminum powder to generate gas for initial setting, and then carrying out high-temperature and high-pressure autoclaved curing. With the development of socioeconomic performance, the resource cost and production cost of siliceous materials (sand or fly ash) and calcium oxide gradually rise, the production cost of autoclaved aerated blocks is higher and higher, and new and cheap raw materials are urgently needed to replace.

Therefore, the sludge carbon is adopted to replace part of raw materials of the autoclaved aerated block to be used by combining the two industries, the problem of the sludge carbon product destination is solved, the production cost of the autoclaved aerated block is reduced, and double economic benefits and social benefits are achieved.

Disclosure of Invention

The invention relates to a method for producing autoclaved aerated blocks by using sludge carbon, which is characterized in that on the basis of analyzing the components of sludge carbon, the sludge carbon is used as a raw material and is mixed and proportioned with siliceous materials (sand or fly ash), lime, cement, gypsum, aluminum powder and other raw materials to prepare the autoclaved aerated blocks. The sludge carbon adding method is characterized in that two adding modes are set according to different processes of an autoclaved aerated block production line, wherein one adding mode is that sludge carbon particles and siliceous materials (sand or fly ash) are mixed according to a certain proportion and ball-milled to prepare slurry, then cement, lime, gypsum and aluminum powder are added for mixing and pulping, and the mixture enters an autoclave for autoclaved brick making after being molded; the other adding mode is that the sludge carbon is made into powder, and is added into siliceous material (sand or fly ash) slurry with cement, lime, gypsum and aluminum powder according to a proportion, and is stirred and mixed evenly, and then is put into an autoclave for autoclaved brick making after being molded.

The proportion of the autoclaved aerated block produced by the sewage peat is as follows: if the calcium oxide in the sludge peat is 30-60%, the sludge peat can replace part of lime to be used as a production raw material, siliceous materials (60-69%), the sludge peat (1-15%), cement (13.8%), lime (5-13.8%), gypsum (2.96%) and aluminium powder (0.4 kg/m)³(ii) a If the content of the silicon dioxide in the sludge carbon is 45-70 percent, the sludge carbon can replace part of siliceous materials for use, and the adding proportion is 50-60 percent of siliceous materials, 1-20 percent of sludge coal, 13.8 percent of cement, 13.8 percent of lime, 2.96 percent of gypsum and 0.4kg/m of aluminum powder³。

Drawings

FIG. 1 is a method for producing autoclaved aerated blocks by sludge carbon particles, and FIG. 2 is a method for producing autoclaved aerated blocks by sludge carbon powder.

Detailed Description

Embodiment mode 1

The specific implementation mode of the method for producing the autoclaved aerated block by using the sludge carbon comprises the following steps:

the method comprises the steps of crushing granular sludge carbon powder into dry powder materials of about 180 meshes by a Raymond mill, and conveying the dry powder materials into a sludge carbon bin for storage for later use, wherein the content of sludge carbon calcium oxide is 60%; sending the yellow sand into a ball mill by using a loading tool to prepare slurry, and sending the slurry into a high-speed stirrer by using a slurry pump for later use (the dry weight of the slurry accounts for 63%); thirdly, starting a stirring device in the high-speed stirring barrel, and sequentially adding cement, lime, sludge carbon powder, gypsum and aluminum powder in batches, wherein the adding proportion of the cement is 13.8% of the dry weight of the total materials, and the adding proportion of the lime is 8% of the dry weight of the total materials; the adding proportion of the sludge carbon powder is 12 percent of the dry weight of the total materials, the adding proportion of the gypsum is 2.96 percent of the dry weight of the total materials, and the adding amount of the aluminum powder is 0.4kg/m³(calculated as the volume of slurry). Fourthly, adding and uniformly stirring the materials; the slurry is quickly put into an autoclaved aerated block steel die and stands for about 2 hours, and the slurry is inThe gas is expanded in the steel die and is gradually initially solidified to form a blank with certain strength. And fifthly, after the green body has the strength, removing the steel die, and cutting the green body into building blocks with fixed sizes by using a steel wire cutting machine. Sixthly, sending the cut blank into a high-pressure still kettle for steam-pressure curing, and finally preparing the qualified steam-pressure aerated building block.

Embodiment mode 2

The specific implementation mode of the method for producing the autoclaved aerated block by using the sludge carbon comprises the following steps:

the method comprises the steps of mixing sludge carbon and silicon dioxide content by 45%, feeding the sludge carbon and the coal ash into a ball mill by using a loading tool according to a ratio of 1:10, adding water, mixing and ball milling to prepare mixed slurry, and then feeding the mixed slurry into a high-speed stirring barrel by using a slurry pump for later use (the dry weight of the slurry accounts for 70%); secondly, starting a stirring device in the high-speed stirring barrel, and sequentially adding cement, lime, gypsum and aluminum powder in batches, wherein the adding proportion of the cement is 13.8% of the dry weight of the total materials, and the adding proportion of the lime is 13.8% of the dry weight of the total materials; the adding proportion of the gypsum is 2.96 percent of the dry weight of the total materials, and the adding amount of the aluminum powder is 0.4kg/m³(calculated as the volume of slurry). The materials are added and stirred uniformly; the slurry is quickly put into an autoclaved aerated block steel die, and is kept still for about 2 hours, the slurry is aerated and expanded in the steel die and is gradually initially solidified to form a blank with certain strength. And fifthly, sending the cut blank into a high-pressure autoclave for autoclaving and curing, and finally preparing the qualified autoclaved aerated building block.

The above embodiments do not represent all embodiments, and there is no description here.