China should promote the development of steel processing and distribution

The steel used in construction is the skeleton of the building. The quality of the reinforcement directly determines the quality and safety of the building and determines the safety of people's lives and property. Paying attention to people's livelihood and focusing on social security has been listed as the “Twelfth Five-Year Plan”. If unqualified building materials are used in the construction, what is created is “problem construction” and it is safe to think of hidden dangers. "Slimming reinforcement" is just like a regular time in the construction industry, which will have a huge impact on the safety of people's lives and property.

To fundamentally solve the problem of “thinning steel bar”, in addition to strengthening the supervision and inspection of the construction market, it should also be solved from the source of construction steel logistics, that is, the steel processing and distribution mechanism. The so-called rebar processing and distribution is not simply combining the existing single machines in the factory, but using advanced production technology, using professional machinery and equipment to optimize the raw materials to make them into steel products, and then distribute and install them according to the progress of the project. Industrialization and standardization of rebar processing and commercialization and specialization of rebar processing distribution are realized.

For a long time, China's steel processing has always been in the traditional hand-workshop production stage. China's steel processing currently adopts two general methods: First, on-site processing, that is, in the simple shed, a twist mill is used for cold pull straightening, there are several cases of bending hooks, and some even because of narrow construction site can only be in the base Pit processing. The second is the traditional steel processing plant, with outdated equipment, low production capacity, large waste, poor product quality, and high cost, and generally only meet the matching of this unit's contracted project. Although the larger construction companies have their own prefabricated components factories, the processing equipment is relatively backward. The above processing methods have the disadvantages of labor intensity, safety hazards, large area, high noise, high cost, and serious waste. These methods seriously restrict the improvement of the quality of construction projects and become a bottleneck for improving the level of mechanized construction. .

In recent years, with the rapid development of China's national economy and sustained increase in people's livelihood investment, the people's livelihood project has been implemented in depth. Currently, some domestic enterprises and construction units have begun to use special equipment with a high level of automation for steel rebar processing, so that steel rebar processing can be used in factory production and commodities. Become a reality. The emerging industry of "rebar processing and distribution center" has also emerged. At present, Beijing, Tianjin, Shanghai, Hebei, Sichuan, Chongqing, Anhui, Shanxi, Guangxi, Guangdong, Heilongjiang, Liaoning and other provinces and cities have begun trials of commodity steel processing and distribution. However, on the whole, the processing and distribution of steel bars is still in its infancy in China, and there has been no substantive progress in steel processing and distribution of scale, factory, and marketization. At the technical level, there are still some problems in automated rebar processing technology. For example, the core technologies and manufacturing levels of key components have restricted the development of the industry. Some automated rebar processing equipment companies have backward manufacturing equipment, no R&D platforms, and rely on imitation or Intermediary channels obtain product technical data, resulting in a large number of low-quality, inefficient products in the market.

The promotion of commercialized processing and rebar reinforcement still needs to solve many problems. First, to solve the problem of philosophy, it is necessary to break through the traditional mode of decentralized one-on-one steel bar simple on-site processing, and establish a new concept of implementing social division of labor and “rebar processing and distribution”. Secondly, the processing and distribution of reinforcing bars is essentially abolishing the prefabricated component factory of the decentralized construction unit, setting up a socialized processing plant, and removing the intermediate circulation company, which will cause problems between the construction companies, steel distributors and professional processing plants. Redistribution of benefits. That is to say, socialized processing plants, circulation companies, and construction companies need to be effectively linked. Thirdly, there are market development and design drawings conversion in the early stage of rebar processing and distribution, and on-site technical guidance and service work in the later period. Fourth, it needs the support and assistance of construction companies and their construction authorities. Fifth, there is an urgent need to accelerate the development of automated production equipment that suits the national conditions.

At present, in order to implement the national requirements for energy-saving emission reduction and structural adjustment work, we are pushing for the application of high-strength steel bars. This is an excellent opportunity to speed up the promotion of commercialized steel processing and distribution, and fundamentally solve the problem of “thinning bars”. The Ministry of Industry and Information Technology and the Ministry of Housing and Urban-Rural Development jointly issued the "Guiding Opinions on Accelerating the Use of High-Strength Steel Bars" (hereinafter referred to as the "Guiding Opinions") on January 16 this year. In order to implement the spirit of the document, we will reduce the use of steel, promote the coordinated development of upstream and downstream industries, do a good job in the integration of high-strength reinforcement production and application promotion technologies, and strengthen technical exchanges in the Ministry of Industry and Information Technology, Ministry of Housing and Urban-Rural Development. Under the requirements and guidance of relevant departments, the China Iron and Steel Industry Association has held the 2012 national high-strength reinforcement development and application promotion technology exchange meeting in Beijing on April 24. The “Guiding Opinions” clarified the road map for accelerating the application of high-strength steel bars and required the phase-out of 335 MPa steel bars in construction projects by the end of 2013; by the end of 2015, the output of high-strength steel bars accounted for 80% of the total output of rebar, which was used in construction projects. The amount reaches more than 65% of the total amount of steel for construction use. For large high-rise buildings and large-span public buildings, priority is given to 500 MPa steel bars, and the production and application ratio of 500 MPa steel bars will be increased year by year. On April 12, the Ministry of Housing and Construction and the Ministry of Industry and Information Technology held a national work conference on the promotion and application of high-strength steel bars in Kunming, Yunnan Province. It was determined that areas with good foundations, such as 400MPa rebar, could be actively applied to 500MPa to achieve national work ahead of schedule. Objectives; cities with poor foundations should be progressive, promote the use of 400MPa as the main; areas with seismic fortification requirements, to promote high-strength seismic reinforcement. In order to complete the tasks of promoting the use of high-strength steel bars, the two departments have selected Yunnan, Chongqing, Jiangsu, Hebei and Xinjiang as pilot sites, aiming to summarize the experience of cities in different regions and conditions, as well as the demonstration of steel companies and construction projects. , To establish a coordination and management mechanism for production, distribution, design, construction, supervision, and acceptance. At present, China's infrastructure, housing and other construction projects, the amount of reinforcement in the 130 million to 150 million tons. Among them, non-high-strength steel accounts for about 60% of the dosage. Once the completion of high-strength steel reinforcement throughout the country, the market size will be close to 100 million tons.

In such an opportune time, on the one hand, the relevant national authorities should strengthen the regulation and supervision of steel processing enterprises and severely crack down on enterprises that engage in "thin-body steel" processing; on the other hand, they should foster the development of large-scale steel processing and distribution centers that are currently legal. At the same time, encourage new formal processing and distribution centers. In such a steel processing and distribution center, priority is given to the use of 400 MPa steel bars and actively promoted 500 MPa steel bars. According to the actual size of the building structure, it is formed by automatic control machining and then transported to construction sites according to the actual construction time. In order to achieve the industrialization and standardization of building steel processing and the commercialization and specialization of construction steel processing and distribution. This can promote the promotion and application of high-strength threaded steel reinforcement in the country and accelerate the development of steel processing and distribution centers, complement each other and cause and effect each other.

In order to achieve the above objectives, we should strengthen the publicity of the superiority of construction steel logistics distribution, change concepts in the related fields of construction steel processing, engineering construction, construction and development, and raise the awareness of the necessity, urgency, and feasibility of the promotion of building steel reinforcement processing and distribution. It is hoped that the relevant national departments will formulate the development plan for steel processing and distribution industry as soon as possible, and formulate relevant support and preferential policies in the fields of steel bar processing management, construction and construction environmental protection, steel bar processing new technologies, and financial services to guide and regulate the construction of steel bars. Processing methods are more efficient, material-saving, and standardized. They encourage intensive steel processing and distribution technology advancement and application, and will unswervingly follow the path of specialized reinforcement processing and logistics distribution.