Cement wrap paper consumes wood
2023-12-21 09:09:49
China is a big producer of cement. Every year, cement packing paper consumes 15 million cubic meters of high-quality wood,...
In the world of reinforced concrete, cement has become an indispensable building material for the construction industry.
After cement is manufactured, there are two types of storage: one is bagged and the other is bulk. Bagged cement is made of high-quality kraft paper bags, usually 50 kilograms into a bag. Bulk cement is relative to bagged cement. It refers to cement delivered directly from a factory to a transfer station or to a user through special equipment or containers.
The disadvantage of bags is that it consumes a lot of resources and it also keeps green away from our home. China's cement output has been ranked first in the world for 13 years. It reached 580 million tons last year, and bagged cement accounted for 470 million tons. It is currently the main sales and circulation method of cement in China. According to the general secretary of the National Bulk Cement Association, Zhen Zhenlu said that because the cement packaging bag uses 80 years of red and white pine wood pulp production, packaging bags can not be recycled and reused, in the blink of an eye a tree into a pile of waste paper. It is estimated that 5.5 tons of wood will be consumed per ton of paper, and 149 million tons of bagged cement will be used in the calculation of last year. It will take 15.51 million cubic meters of high quality wood and consume 9.4 billion paper bags. Papermaking also wastes 560 million tons of water and 3.66 million tons of coal and other resources.
The use of paper bags for cement also causes economic and energy waste. According to analysis by Prof. Zhu Tan, Dean of School of Environmental Science and Engineering at Tianjin Nankai University, in cement bags, the packaging cost per ton of cement accounts for approximately 20% of the production cost and 16% of the sales price. In addition, due to the damage of the paper bag and the loss of cement residue in the paper bag of more than 5%, this alone, the country will lose more than 20 million tons of cement each year, worth more than 5 billion yuan. In addition, the environmental pollution of bagged cement can not be calculated.
It can be seen that all aspects of bagged cement from packaging to use are extensive and backward. It wastes resources and pollutes the environment and represents a small-scale production and packaging method.
Bulk Advantages Bulk cement saves resources is an indisputable fact. At the National Bulk Cement Working Conference held at the beginning of the year, Zhao Jiarong, Director of the Department of Resource Conservation and Comprehensive Utilization of the State Economic and Trade Commission, introduced that during the “Ninth Five-Year Plan†period, bulk cement was promoted, saving 14.12 million cubic meters of high quality wood, equivalent to four Annual harvesting of timber in Daxing'anling; Savings of 33.4 million tons, equivalent to the annual output of a large coal mine; Savings of 3.1 billion kilowatt-hours, equivalent to 20 months of power generation at Xin'anjiang Hydropower Station; Saving more than 500 million tons of water, more than Hangzhou West Lake has more water storage capacity; it has reduced cement loss by 21.4 million tons, equivalent to the annual output of 8 Jidong cement plants. During the "Ninth Five-Year Plan" period, a total economic benefit of RMB 19.3 billion was created
The development of bulk cement is conducive to improving the quality of atmospheric environment and reducing pollution. Zhao Jiarong said that the development of bulk cement during the “Ninth Five-Year Plan†period had significant environmental benefits. The value of conservation water resources was 558 million yuan, soil conservation value was 699 million yuan, and the value of carbon dioxide absorbed was 407 million yuan, reducing sulfur dioxide emissions. 618,000 tons. In addition, cement is bulk-packed in closed containers to solve the secondary pollution of the cement in the use of links.
Cement bulk improves labor intensity and increases labor productivity. Many companies have developed bulk cement as an important measure to reduce staffing, increase efficiency, and achieve the goal of getting rid of difficulties. According to Xu Peigong, chairman of the Xuan Xuan Box, the original packaging process of a cement plant occupied 103 workers, and only 5 workers were required after the bulk plant was installed; for example, when a component factory used bagged cement, 40 workers were often organized to unload the train. 20 people use stacking, handling and unpacking. After using bulk, only 10 people are used for the entire section. Therefore, bulk cement provides benefits to both production and use companies.
Bulk cement provides a reliable quality assurance. According to the test results, the strength of the bagged cement after being stored in the work shed for three months is 15%-20%, and after 6 months, the strength is reduced by 20%-30%. In case of relatively high humidity and weather conditions, even grain formation may occur. Blocks will become inert materials with no strength. The bulk cement is kept in a relatively closed warehouse or container for 13 months, and the quality remains unchanged. At the same time, the inferior cement is not easily mixed into shoddy by artificial mixing, thus ensuring the quality of the cement and eliminating the inferior quality projects.
The benefits of bulk cement are numerous. The development from bag to bulk is not a simple difference in packaging. More importantly, the profound changes in the production, circulation, and use of production materials are the transition from extensive operations to intensive operations. , is the only way to achieve sustainable development.
Difficulties in pushing the world The developed countries in the 20th century and the 1960s took less than 20 years to complete the reform of cement from bag to bulk, and the bulk rate remained above 90%. Although China is a big country for cement production, it is also a weak country for cement production. The proportion of high-grade high-quality cement is small, and the main factors that restrict the bulk cement process are:
1. The structure of the cement industry is irrational.
The concentration of cement production in China is very low, and the annual output of the largest cement production enterprises is only about 5 million tons. According to statistical data, there are more than 8,000 cement plants in the country, and there are only 260 production scales over 200,000 tons. The output only accounts for 20% of the total cement output in China. The remaining 80% are small cement plants with small production scale and low quality. It is difficult to meet the needs of large-scale social production.
2. The structure of cement products is irrational, technology is backward, and the capacity of comprehensive facilities is low.
At present, China is mainly engaged in production methods of shaft kiln with small scale of production, simple equipment, backward technology, low output, and low quality. Jun Zhenfu stated frankly that due to the congenitally deficient cement structure in China, the growth of cement is driven by the high input of resources and labor, and the cement products it brings are also unreasonable. The high-quality cement used to construct the structure only accounts for 20% of the cement output, and low-grade cement. Existence in large quantities, large projects can not be used, resulting in a substantial increase in bagged cement. High-tech, fully automated bulk production is low, and production, supply, transportation, storage, and use are not smooth. This also results in insufficient stamina for bulk cement development. It is understood that at present, there is no large-tonnage bulk ship that China has developed on its own, and the automation level for bulk measurement is also low.
3. The collection of bulk cement special funds lacks the necessary means.
In order to encourage development, the state promulgated the policy of levying special bulk funds for cement production enterprises, and also formulated the “Management Measures for Bulk Cement Fundsâ€, which opened the way for the promotion of cement bulking according to law. But resistance is heavy. According to Zhen Zhenjun, due to lack of necessary collection methods, the national collection rate for bulk cement funds is less than 40%. Coupled with the chaos of the management agencies, each proceeding from the interests of the department, the local closure phenomenon is serious, so that the limited special funds are misappropriated, occupied or misused, affecting the technological progress of the company, and at the same time can not form an open and unified big market.
The highlights of the bulk First of all, from the understanding of understanding, the development of bulk cement is not just to save packaging materials and costs, but should closely link this work with the progress of the entire social civilization. Zhao Jiarong said that during the “10th Five-Year Plan†period, bulk cement development should be regarded as a key content of the implementation of the sustainable development strategy, and based on China’s national conditions, the development experience of foreign attack and fill cement should be used for reference, and bulk cement development and cement structure adjustment should be implemented to improve construction technology. Combined levels. Fortunately, last year, China's bulk volume rate has increased substantially, and for the first time, the growth rate of bulk cement production is greater than the growth rate of cement production. There are 13 provinces and cities above the national average, of which Zhejiang Province has reached 13.84 million tons, ranking first in the country.
Secondly, we must strengthen the adjustment of the structure and layout of the cement industry, optimize the combination of existing production factors according to local conditions, support large and medium-sized cement companies, and eliminate small and medium-sized cement plants. For the characteristics of large and medium-sized cities and rural areas, rational planning and layout, through the merger and strong combination of roads to achieve complementary advantages, the development of intensive enterprise groups.
Third, intensify policy guidance, promote education in accordance with the law, increase investment in science and technology, and develop new technologies for bulk water more quickly. With the advent of the WTO, facing the fiercely competitive market, bulk is the direction of development, and the government's macro-control is particularly important. For example, whether bulk cement can be included in the national “Product Catalog for Resource Saving and Comprehensive Utilization†and enjoy the country’s industrial policy; “Investment Policy for Bulk Cement at the Current Stage†is formulated; “Incentives for the Development of Bulk Cement Science and Technology Progress and Invention Award†and other incentives are established. policy. Accelerate the pace of “promotion by law†and combine it with the “Air Pollution Prevention Lawâ€, “Labor Safety and Health Law†and “Environmental Protection Law†to finally achieve the purpose of developing bulk cement.
The 21st century belongs to the century of environmental protection. Bulk cement is not only adapted to the global environment, but also adapts to the development of China. Whether it is to realize the sustainable development of the whole society or to promote the sustainable development of the building materials industry itself, the development of bulk cement is in full swing. Imperative.
In the world of reinforced concrete, cement has become an indispensable building material for the construction industry.
After cement is manufactured, there are two types of storage: one is bagged and the other is bulk. Bagged cement is made of high-quality kraft paper bags, usually 50 kilograms into a bag. Bulk cement is relative to bagged cement. It refers to cement delivered directly from a factory to a transfer station or to a user through special equipment or containers.
The disadvantage of bags is that it consumes a lot of resources and it also keeps green away from our home. China's cement output has been ranked first in the world for 13 years. It reached 580 million tons last year, and bagged cement accounted for 470 million tons. It is currently the main sales and circulation method of cement in China. According to the general secretary of the National Bulk Cement Association, Zhen Zhenlu said that because the cement packaging bag uses 80 years of red and white pine wood pulp production, packaging bags can not be recycled and reused, in the blink of an eye a tree into a pile of waste paper. It is estimated that 5.5 tons of wood will be consumed per ton of paper, and 149 million tons of bagged cement will be used in the calculation of last year. It will take 15.51 million cubic meters of high quality wood and consume 9.4 billion paper bags. Papermaking also wastes 560 million tons of water and 3.66 million tons of coal and other resources.
The use of paper bags for cement also causes economic and energy waste. According to analysis by Prof. Zhu Tan, Dean of School of Environmental Science and Engineering at Tianjin Nankai University, in cement bags, the packaging cost per ton of cement accounts for approximately 20% of the production cost and 16% of the sales price. In addition, due to the damage of the paper bag and the loss of cement residue in the paper bag of more than 5%, this alone, the country will lose more than 20 million tons of cement each year, worth more than 5 billion yuan. In addition, the environmental pollution of bagged cement can not be calculated.
It can be seen that all aspects of bagged cement from packaging to use are extensive and backward. It wastes resources and pollutes the environment and represents a small-scale production and packaging method.
Bulk Advantages Bulk cement saves resources is an indisputable fact. At the National Bulk Cement Working Conference held at the beginning of the year, Zhao Jiarong, Director of the Department of Resource Conservation and Comprehensive Utilization of the State Economic and Trade Commission, introduced that during the “Ninth Five-Year Plan†period, bulk cement was promoted, saving 14.12 million cubic meters of high quality wood, equivalent to four Annual harvesting of timber in Daxing'anling; Savings of 33.4 million tons, equivalent to the annual output of a large coal mine; Savings of 3.1 billion kilowatt-hours, equivalent to 20 months of power generation at Xin'anjiang Hydropower Station; Saving more than 500 million tons of water, more than Hangzhou West Lake has more water storage capacity; it has reduced cement loss by 21.4 million tons, equivalent to the annual output of 8 Jidong cement plants. During the "Ninth Five-Year Plan" period, a total economic benefit of RMB 19.3 billion was created
The development of bulk cement is conducive to improving the quality of atmospheric environment and reducing pollution. Zhao Jiarong said that the development of bulk cement during the “Ninth Five-Year Plan†period had significant environmental benefits. The value of conservation water resources was 558 million yuan, soil conservation value was 699 million yuan, and the value of carbon dioxide absorbed was 407 million yuan, reducing sulfur dioxide emissions. 618,000 tons. In addition, cement is bulk-packed in closed containers to solve the secondary pollution of the cement in the use of links.
Cement bulk improves labor intensity and increases labor productivity. Many companies have developed bulk cement as an important measure to reduce staffing, increase efficiency, and achieve the goal of getting rid of difficulties. According to Xu Peigong, chairman of the Xuan Xuan Box, the original packaging process of a cement plant occupied 103 workers, and only 5 workers were required after the bulk plant was installed; for example, when a component factory used bagged cement, 40 workers were often organized to unload the train. 20 people use stacking, handling and unpacking. After using bulk, only 10 people are used for the entire section. Therefore, bulk cement provides benefits to both production and use companies.
Bulk cement provides a reliable quality assurance. According to the test results, the strength of the bagged cement after being stored in the work shed for three months is 15%-20%, and after 6 months, the strength is reduced by 20%-30%. In case of relatively high humidity and weather conditions, even grain formation may occur. Blocks will become inert materials with no strength. The bulk cement is kept in a relatively closed warehouse or container for 13 months, and the quality remains unchanged. At the same time, the inferior cement is not easily mixed into shoddy by artificial mixing, thus ensuring the quality of the cement and eliminating the inferior quality projects.
The benefits of bulk cement are numerous. The development from bag to bulk is not a simple difference in packaging. More importantly, the profound changes in the production, circulation, and use of production materials are the transition from extensive operations to intensive operations. , is the only way to achieve sustainable development.
Difficulties in pushing the world The developed countries in the 20th century and the 1960s took less than 20 years to complete the reform of cement from bag to bulk, and the bulk rate remained above 90%. Although China is a big country for cement production, it is also a weak country for cement production. The proportion of high-grade high-quality cement is small, and the main factors that restrict the bulk cement process are:
1. The structure of the cement industry is irrational.
The concentration of cement production in China is very low, and the annual output of the largest cement production enterprises is only about 5 million tons. According to statistical data, there are more than 8,000 cement plants in the country, and there are only 260 production scales over 200,000 tons. The output only accounts for 20% of the total cement output in China. The remaining 80% are small cement plants with small production scale and low quality. It is difficult to meet the needs of large-scale social production.
2. The structure of cement products is irrational, technology is backward, and the capacity of comprehensive facilities is low.
At present, China is mainly engaged in production methods of shaft kiln with small scale of production, simple equipment, backward technology, low output, and low quality. Jun Zhenfu stated frankly that due to the congenitally deficient cement structure in China, the growth of cement is driven by the high input of resources and labor, and the cement products it brings are also unreasonable. The high-quality cement used to construct the structure only accounts for 20% of the cement output, and low-grade cement. Existence in large quantities, large projects can not be used, resulting in a substantial increase in bagged cement. High-tech, fully automated bulk production is low, and production, supply, transportation, storage, and use are not smooth. This also results in insufficient stamina for bulk cement development. It is understood that at present, there is no large-tonnage bulk ship that China has developed on its own, and the automation level for bulk measurement is also low.
3. The collection of bulk cement special funds lacks the necessary means.
In order to encourage development, the state promulgated the policy of levying special bulk funds for cement production enterprises, and also formulated the “Management Measures for Bulk Cement Fundsâ€, which opened the way for the promotion of cement bulking according to law. But resistance is heavy. According to Zhen Zhenjun, due to lack of necessary collection methods, the national collection rate for bulk cement funds is less than 40%. Coupled with the chaos of the management agencies, each proceeding from the interests of the department, the local closure phenomenon is serious, so that the limited special funds are misappropriated, occupied or misused, affecting the technological progress of the company, and at the same time can not form an open and unified big market.
The highlights of the bulk First of all, from the understanding of understanding, the development of bulk cement is not just to save packaging materials and costs, but should closely link this work with the progress of the entire social civilization. Zhao Jiarong said that during the “10th Five-Year Plan†period, bulk cement development should be regarded as a key content of the implementation of the sustainable development strategy, and based on China’s national conditions, the development experience of foreign attack and fill cement should be used for reference, and bulk cement development and cement structure adjustment should be implemented to improve construction technology. Combined levels. Fortunately, last year, China's bulk volume rate has increased substantially, and for the first time, the growth rate of bulk cement production is greater than the growth rate of cement production. There are 13 provinces and cities above the national average, of which Zhejiang Province has reached 13.84 million tons, ranking first in the country.
Secondly, we must strengthen the adjustment of the structure and layout of the cement industry, optimize the combination of existing production factors according to local conditions, support large and medium-sized cement companies, and eliminate small and medium-sized cement plants. For the characteristics of large and medium-sized cities and rural areas, rational planning and layout, through the merger and strong combination of roads to achieve complementary advantages, the development of intensive enterprise groups.
Third, intensify policy guidance, promote education in accordance with the law, increase investment in science and technology, and develop new technologies for bulk water more quickly. With the advent of the WTO, facing the fiercely competitive market, bulk is the direction of development, and the government's macro-control is particularly important. For example, whether bulk cement can be included in the national “Product Catalog for Resource Saving and Comprehensive Utilization†and enjoy the country’s industrial policy; “Investment Policy for Bulk Cement at the Current Stage†is formulated; “Incentives for the Development of Bulk Cement Science and Technology Progress and Invention Award†and other incentives are established. policy. Accelerate the pace of “promotion by law†and combine it with the “Air Pollution Prevention Lawâ€, “Labor Safety and Health Law†and “Environmental Protection Law†to finally achieve the purpose of developing bulk cement.
The 21st century belongs to the century of environmental protection. Bulk cement is not only adapted to the global environment, but also adapts to the development of China. Whether it is to realize the sustainable development of the whole society or to promote the sustainable development of the building materials industry itself, the development of bulk cement is in full swing. Imperative.
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