Energy conservation and emission reduction will be expanded from industrial and living areas to industrial, living, transportation and rural areas. The Beijing-Tianjin-Hebei, Yangtze River Delta and Pearl River Delta regions will carry out monitoring of pollutants such as ozone and fine particulate matter (PM2.5)... ... The "Twelfth Five-Year Plan for National Environmental Protection" (hereinafter referred to as "Environmental Protection Plan") released recently showed that China will carry out energy conservation and emission reduction in a wider breadth and depth. For the steel industry, the Environmental Protection Plan also pointed out the corresponding direction. During the “Twelfth Five-Year Plan†period, the main work of environmental protection in the iron and steel industry will focus on four major areas: elimination of backwardness, sintering of desulfurization and denitrification, sintering of high-efficiency dust removal and prevention and control of pollution. Intensifying the elimination of backward production capacity in industries such as steel... It is precisely because of the low efficiency of energy resources and high pollution emissions due to backward production capacity, “speeding up the elimination of backward production capacity†has become the first measure in the “Environmental Protection Planâ€. During the "Eleventh Five-Year Plan" period, China's steel industry has cumulatively eliminated 117,000 tons of backward ironmaking capacity and 69 million tons of steelmaking capacity. During the "Twelfth Five-Year Plan" period, the steel industry plans to eliminate backward ironmaking capacity of 75 million yuan. The production capacity of tons and backward steelmaking is 48 million tons. Specifically, the previously published "Twelfth Five-Year Development Plan for the Iron and Steel Industry" pointed out that it is necessary to eliminate the sintering machine below 90 square meters, the pellet furnace below 8 square meters, the ironmaking blast furnace of 400 cubic meters and below, 200 cubic meters. And the following professional cast iron pipe factory blast furnace, 30 tons and below steelmaking converter, 600 mm and below hot-rolled narrow-belt rolling mill... In order to promote the elimination of backwardness and new construction, reconstruction and expansion projects, the Minister of Environmental Protection Zhou Shengxian recently held the first At the Seventh National Environmental Protection Conference, it was emphasized that the main pollutant discharge total control indicators should be used as pre-conditions for the approval of new construction, renovation and expansion projects, and pollution emissions should be reduced from the source. In this regard, a relevant person in charge of the Department of Environmental Pollution Control of the Ministry of Environmental Protection told reporters that at present, in various industries, the phenomenon of unapproved construction, approval, and implementation of the EIA approval measures still exist to varying degrees. In order to change this situation, the total amount as a pre-condition for the EIA is to be implemented after the first approval, first to quantify the project, and to control the new amount as much as possible. According to reports, the emissions of sulfur dioxide and nitrogen oxides in the power and steel industries account for more than 60% of industrial emissions, and the chemical oxygen demand and ammonia nitrogen emissions from papermaking and printing account for about 40% of industrial emissions. Therefore, the total discharge of major pollutants has been implemented in the four industries of electricity, steel, paper, printing and dyeing. It is understood that in order to improve the operability of total control, the measures for cross-regional adjustment of emissions from new renovation and expansion projects previously implemented in the power industry will be extended to the above four industries during the “Twelfth Five-Year Plan†period, which can be achieved by super-environmental capacity. The area is allocated to areas with surplus environmental capacity. At the same time, the "Environmental Protection Plan" also pointed out that it is necessary to improve pollutant discharge standards and clean production evaluation indicators in papermaking, printing and dyeing, chemical, metallurgy, building materials, non-ferrous metals, leather and other industries, and encourage local governments to develop more stringent pollutant discharge standards. For some industries, it is also possible to explore the establishment of a system for evaluating the intensity of pollutants per unit of product.
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Torx or star drive heads provide lots of power transfer between the driver and screw and are a great option when many screws are needed, as they provide minimum wear to bits. They are, interestingly, often referred to as [security fasteners," as they`re the choice of schools, correctional facilities, and public buildings, as well as automotive and electronic manufacturing, where the ability to remove hardware needs to be discouraged.
Sheet metal or panhead screws are useful, when the fastener does not need to be flush with the material (countersunk). Since the head is wider and the thread extends the entire length (no shank), this type of screw head is excellent for joining wood to other materials, metal included.
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