Non-burning brick feasibility report
With the acceleration of economic construction, especially the development of electric power industry, a large amount of fly ash will be generated. In order to make full use of waste resources and protect land and environment, it is particularly important to comprehensively develop and utilize fly ash. After long-term demonstration research and adjustment and improvement in actual application, "high-volume fly ash free-burning brick technology" has been successfully developed. The technology can make a large amount of fly ash, and its dosage reaches more than 80%, which opens up a new way for a large amount of digestion and utilization of fly ash.
High-volume fly ash-free bricks are made from fly ash as a main raw material, and a small amount of cement, additives and water are produced by rim, aging, rim mixing, pressure forming, and impregnation curing process. The quality of its products has been tested by the national quality inspection station and reached the first-class index requirement of gb5101 sintered ordinary clay brick. The durability of the product has not been found to have the effects of strength reduction, cracking, falling angle and powdering after many years of investigation.
1. The main raw materials for the production of self-supporting waste slag bricks are industrial waste slag, such as fly ash, coal gangue, slag, steel slag and various waste bricks, stone powder, river sand, various tailings, etc., the amount of which is more than 80%, source In various power plants, coal mines, thermal power plants, steel plants, stone plants. Other accessories are lime, cement, gypsum, additives, etc.
2. Forming mechanism Fly ash, coal gangue, slag and other industrial wastes contain high cerium oxide, aluminum oxide, iron oxide, after the raw material is mixed with rims, fully hydrated to form bismuth, aluminum-type vitreous, this glass body and water After the oxidation of calcium oxide, a chemical reaction is generated, which is called "pozzolanic reaction" and its chemical equation is as follows:
Cao+h2o→cao2+q↑
Quicklime water hydrate heat
Xca2+xsio2+nh2o→xcaosio2h2o
Xca2+xal3o2+nh2o→xcaoal2o3h2o
Hydrate Active Material Water Hydration Calcium citrate in the chemical reaction of calcium citrate is a colloidal glass body. This colloidal glass body is unstable, but under the action of additives, it gradually solidifies with time. A high-strength network structure, combined with the rational allocation and maintenance of raw materials, thus forming the strength of self-supporting bricks.
III. Production Process The production process of self-supporting waste slag brick is very simple, the process is as follows:
Feeding machine→rim mixer→belt conveyor→calculator→brick→conservation→finished product→factory under normal circumstances, 500 kg of raw materials, mixed into 0.5m3 rim for 6-8 minutes, raw materials are sent to the storage hopper The feeder and the brick presser out the bricks at a speed of 1800-XX per hour. At the same time, they are manually picked up to the flat car and transported to the brick yard. There is no gap between the bricks. The height is 15 layers, and the natural maintenance is carried out. 10-15 days, you can ship the finished product.
4. Technical indicators are tested by the Institute of Engineering Materials and Products of China Academy of Building Research. The self-supporting waste slag bricks have excellent performance, and their mechanical properties can reach 100#-200#. The appearance quality is first-class.
Compressive strength 100kg-200kg/cm2
Flexural strength 26kg-40kg/cm2
Water absorption rate 12.2%-13%
Freezing and thawing: After 15 times of freezing and thawing, the strength is enhanced and the appearance quality is unchanged.
V. Auxiliary equipment and production capacity A complete set of equipment has brick press, rim machine and loading machine. The total power required is 42.07 kW, the power required for normal operation is 34 kW, and the production workers are 9 people. 1600-3000m2, plant area of 100-200m2, brick machine out of 1800-XX bricks per hour, with an annual production capacity of 5-8 million bricks.
6. Cost and Benefit Analysis The prices of materials vary from region to region, and the cost varies. Take a coal mine as an example. The industrial waste residue is meteorite slag after coal gangue power generation. The following are the four parts of the cost of raw materials, electricity, workers' wages and equipment depreciation:
Fly ash: 5-20 yuan / ton natural curing brick: fly ash each brick accounted for 2.5 kg aggregate size accounted for 2.5 kg of room temperature steaming and high pressure steaming according to the actual ratio of raw materials.
Cement: 220-300 yuan / ton of cement in each brick accounted for 3-4. That is 8-10% of the total raw materials.
Electricity fee: 0.7-1 points/block Labor cost: 1.3-1.8 points/block Additive: 0.1 points/block Equipment depreciation: 0.2 points/block accounting, a company's fly ash production self-supporting waste slag bricks The above four parts cost is 8.5 -9 points / block, the test performance of the brick reached 10 or more, the local clay brick sales price of 15 points / block, calculated according to the annual output of 24 to 26 million bricks, each brick net profit of more than 6 points, the annual profit of more than 150 10,000, the investment can be recovered in the same year. In addition, the self-supporting waste bricks are used as waste residue, and can enjoy a series of preferential policies of the state, and can be used as a free income tax.
Seven. Characteristics of self-supporting waste bricks
1. The use of various industrial waste residue main raw materials, the content of more than 80%, turning waste into treasure, turning harm into profit.
2. The self-supporting waste residue project has great competitive advantages. At present, the country strictly limits the production of clay bricks. The bricks do not use clay as raw materials to protect the farmland and protect the cultivated land.
3. No need to roast, no need to build kiln and steaming tank to protect the environment and save energy.
4. Mechanized production, simple production process, easy to master, can be used in all parts.
5. Because it is pressed and formed by brick machine in the cavity, the appearance of the brick is very regular, and the technical indicators are better than clay sintered brick, steamed slag, gray sand brick.
6. In addition to the standard two or four bricks, the "autotrophic waste slag brick" technology can also produce eight or five perforated bricks, ninety-five perforated bricks, hollow blocks and other building materials.
7. At present, in all the technology of building building materials using industrial waste residue, the self-supporting waste residue brick project has the least investment and quick effect.
High-volume fly ash-free bricks are made from fly ash as a main raw material, and a small amount of cement, additives and water are produced by rim, aging, rim mixing, pressure forming, and impregnation curing process. The quality of its products has been tested by the national quality inspection station and reached the first-class index requirement of gb5101 sintered ordinary clay brick. The durability of the product has not been found to have the effects of strength reduction, cracking, falling angle and powdering after many years of investigation.
1. The main raw materials for the production of self-supporting waste slag bricks are industrial waste slag, such as fly ash, coal gangue, slag, steel slag and various waste bricks, stone powder, river sand, various tailings, etc., the amount of which is more than 80%, source In various power plants, coal mines, thermal power plants, steel plants, stone plants. Other accessories are lime, cement, gypsum, additives, etc.
2. Forming mechanism Fly ash, coal gangue, slag and other industrial wastes contain high cerium oxide, aluminum oxide, iron oxide, after the raw material is mixed with rims, fully hydrated to form bismuth, aluminum-type vitreous, this glass body and water After the oxidation of calcium oxide, a chemical reaction is generated, which is called "pozzolanic reaction" and its chemical equation is as follows:
Cao+h2o→cao2+q↑
Quicklime water hydrate heat
Xca2+xsio2+nh2o→xcaosio2h2o
Xca2+xal3o2+nh2o→xcaoal2o3h2o
Hydrate Active Material Water Hydration Calcium citrate in the chemical reaction of calcium citrate is a colloidal glass body. This colloidal glass body is unstable, but under the action of additives, it gradually solidifies with time. A high-strength network structure, combined with the rational allocation and maintenance of raw materials, thus forming the strength of self-supporting bricks.
III. Production Process The production process of self-supporting waste slag brick is very simple, the process is as follows:
Feeding machine→rim mixer→belt conveyor→calculator→brick→conservation→finished product→factory under normal circumstances, 500 kg of raw materials, mixed into 0.5m3 rim for 6-8 minutes, raw materials are sent to the storage hopper The feeder and the brick presser out the bricks at a speed of 1800-XX per hour. At the same time, they are manually picked up to the flat car and transported to the brick yard. There is no gap between the bricks. The height is 15 layers, and the natural maintenance is carried out. 10-15 days, you can ship the finished product.
4. Technical indicators are tested by the Institute of Engineering Materials and Products of China Academy of Building Research. The self-supporting waste slag bricks have excellent performance, and their mechanical properties can reach 100#-200#. The appearance quality is first-class.
Compressive strength 100kg-200kg/cm2
Flexural strength 26kg-40kg/cm2
Water absorption rate 12.2%-13%
Freezing and thawing: After 15 times of freezing and thawing, the strength is enhanced and the appearance quality is unchanged.
V. Auxiliary equipment and production capacity A complete set of equipment has brick press, rim machine and loading machine. The total power required is 42.07 kW, the power required for normal operation is 34 kW, and the production workers are 9 people. 1600-3000m2, plant area of 100-200m2, brick machine out of 1800-XX bricks per hour, with an annual production capacity of 5-8 million bricks.
6. Cost and Benefit Analysis The prices of materials vary from region to region, and the cost varies. Take a coal mine as an example. The industrial waste residue is meteorite slag after coal gangue power generation. The following are the four parts of the cost of raw materials, electricity, workers' wages and equipment depreciation:
Fly ash: 5-20 yuan / ton natural curing brick: fly ash each brick accounted for 2.5 kg aggregate size accounted for 2.5 kg of room temperature steaming and high pressure steaming according to the actual ratio of raw materials.
Cement: 220-300 yuan / ton of cement in each brick accounted for 3-4. That is 8-10% of the total raw materials.
Electricity fee: 0.7-1 points/block Labor cost: 1.3-1.8 points/block Additive: 0.1 points/block Equipment depreciation: 0.2 points/block accounting, a company's fly ash production self-supporting waste slag bricks The above four parts cost is 8.5 -9 points / block, the test performance of the brick reached 10 or more, the local clay brick sales price of 15 points / block, calculated according to the annual output of 24 to 26 million bricks, each brick net profit of more than 6 points, the annual profit of more than 150 10,000, the investment can be recovered in the same year. In addition, the self-supporting waste bricks are used as waste residue, and can enjoy a series of preferential policies of the state, and can be used as a free income tax.
Seven. Characteristics of self-supporting waste bricks
1. The use of various industrial waste residue main raw materials, the content of more than 80%, turning waste into treasure, turning harm into profit.
2. The self-supporting waste residue project has great competitive advantages. At present, the country strictly limits the production of clay bricks. The bricks do not use clay as raw materials to protect the farmland and protect the cultivated land.
3. No need to roast, no need to build kiln and steaming tank to protect the environment and save energy.
4. Mechanized production, simple production process, easy to master, can be used in all parts.
5. Because it is pressed and formed by brick machine in the cavity, the appearance of the brick is very regular, and the technical indicators are better than clay sintered brick, steamed slag, gray sand brick.
6. In addition to the standard two or four bricks, the "autotrophic waste slag brick" technology can also produce eight or five perforated bricks, ninety-five perforated bricks, hollow blocks and other building materials.
7. At present, in all the technology of building building materials using industrial waste residue, the self-supporting waste residue brick project has the least investment and quick effect.
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