HDPE is the main component of root-blocking board, which has excellent resistance to root puncture and can resist most plant roots. Mainly used in planting roof greening, garage roof greening on the ordinary water-blocking layer, to prevent plant roots puncture damage water-blocking layer caused roof leakage.
It has good physical and mechanical properties, high tear resistance, strong deformation adaptability, puncture resistance, oil and salt resistance, acid and alkali resistance, corrosion resistance, high and low temperature resistance, and long service time. Water blocking, drainage and water leakage prevention have good effect, complete thickness specifications, low cost and simple construction.
1. Stop Bamboo roots and rhizomes from spreading
Q : Are you a factory or trading company?
A : We are a professional manufacturer that specialized in geomembrane, geotextile, Composite Geomembrane etc with ISO9001 certificate more than 15 years.
Q : Where is your factory located? How can I visit there?
A : Our facoty is located is No.10 Yuanshan Road High-tech Development Zone, Laiwu District, Jinan City China. You can take the plan to Jinan Yaoqiang International Airport, then we can pick you up.
Q : Could you send the sample before order confirmation?
A : Yes, we'd love to send a free sample to you for an evaluation if you need.
Q : How about the delivery time?
A : General within 3-7 days after received the deposit.
Q : Can you produce the product according to customers' requirements?
A : Sure, we are professional manufacturer, OEM and ODM are both welcome.
Q : Are you the Gold and Assessed supplier on alibaba?
A : Yes. We are the gold and assessed supplier on alibaba and has got the factory report by SGS.
Root Barrier,Fish Pond Liner,Black Hdpe Geomembrane,Hdpe Liner Geomembrane Shandong Jinruixiang Geotextile Material Co., Ltd , https://www.jrxgeosynthetics.com
Item
Test Value
0.8mm
1.0mm
1.25mm
1.5mm
1.8mm
2.0mm
2.5mm
3.0mm
Minimum Density (g/cm)
0.94
Strength at yield, N/mm
11
15
18
23
27
30
38
45
Strength at break, N/mm
21
28
33
43
51
57
71
85
Elongation at yield, %
13
Elongation at break, %
600min
Tear Resistance N
93
125
156
187
219
249
311
373
Puncture Resistance N
263
352
440
530
618
703
881
1059
2. can be used to stop weeds roots from spreading
Application of calcium-based series cored wire in the outside refining process
Jiang Xia Chen Kuisheng Ning Juncai
Anyang Taihang Metallurgical Co., Ltd. is located in the north of Henan Province, the junction of the four provinces of Shanxi and Shandong provinces, the Beijing-Guangzhou Railway, the Beijing-Kowloon Railway, the 007 National Highway, the Beijing-Zhuhai Expressway, the Guangzhou-Guangzhou High-speed Highway, and the South-to-North Water Transfer Middle Route Project. The unique traffic advantage of the central city in the north of Henan Province.
Our company's products are mainly multi-element ferroalloy series, nitriding alloys and metallurgical refractories, which are mainly supplied to several large and medium-sized steel smelting enterprises in the country and have won a good reputation in the market operation for over 20 years. Especially in recent years, the rapid development of China's iron and steel industry, the demand for multiple composite alloy materials is also growing. Therefore, in order to meet the needs of the market, our company has jointly researched with the Beijing Iron and Steel Research Institute and Beijing University of Science and Technology, and developed and developed a series of calcium-based cored wire products for various steel refining applications.
With the development of the steelmaking process, composite deoxidizers for steelmaking have received widespread attention and applications, and have achieved good results for the improvement of steel quality and the smoothness of production. At present, China's steel companies use a variety of deoxidizers in the refining process. The range of composition changes is very large, and the method of addition is different, and the use effect is not the same. It is necessary to choose a more reasonable composite deoxidant composition based on the directional and steel properties of the steelmaking and continuous casting process.
The calcium-iron cored wire and calcium-aluminum core wire developed by our company in the 1990s have been used by large and medium-sized steel companies such as heavy steel, Xiangtan Steel, New Steel, Guangzhou Steel and Yantai Steel for more than a decade. Applications have achieved significant deoxygenation effects. The two research results have applied for national patents with patent numbers of .6 and 200610018080.9 respectively. Based on this achievement, we have also developed calcium-magnesium-coated core wire, calcium-aluminum-silica-cored wire, calcium-cerium-silicon-silicon-cored wire, calcium-silicon-aluminum-silicon-aluminum-coated wire, and other calcium-based series. Multi-element alloy core wire. The calcium-based cored wire has become the company's flagship product and pillar industry.
The colleagues in the refining process outside the furnace all know that the conditions for the creation of a good liquid deoxidation product are to reduce the amount of Al2O3, rapidly deoxidize, increase the deoxidation capacity of Ca and Al, and fully exert the deoxidation characteristics of each element in the composite deoxidizer. effect. Because, when Si steel alloys were added at the time of tapping, Si adjustment and deoxidation were performed, and Si had a large deoxidation amount (1.443 kilograms of oxygen per kilogram of Si is combined) and low cost, and generally reduced the [O] to ( 80-120)×10-6 At this time, the Si content required in the molten steel is also adjusted, which creates the conditions for improving the deoxidation efficiency and reducing the consumption of the strong deoxidizing elements Ca and Al. Deoxygenation is a fast and uneven reaction. The strong reaction of deoxidizer and [O] tends to balance as the element dissolves, and the deoxidation amount decreases.
The deoxidation reaction occurs when the element in the deoxidizer is in contact with [O]. Because the element content is high, the negative value of the standard Gibbs free energy ΔGΘ of the reaction is much larger than the negative value after the uniform dissolution. When feeding the wire, Al2O3 and CaO (melting points of 2050°C and 2570°C respectively) are generated at the contact with [O].
Due to the different regions produced by the deoxidation product, it is difficult to generate low-melting inclusions due to collision, so that the amount of dissolved Ca and Al is increased, and the deoxidization efficiency of the element is reduced. Because the Al2O3 inclusions generated in the molten steel are not easily eliminated, the viscosity of the molten steel is also increased, and the possibility of water plugging and nodule formation is increased. Therefore, the deoxygenation state should be changed by adjusting the mixing ratio.
The proper proportion of Ca and Al in the composite deoxidizer is the key to ensure the formation of liquid inclusions. The combination of Ca and Al is better than Mn, Si, Si, Al, Ca, Si, etc. First, the deoxidation abilities of both elements are large, and they easily generate deoxidation products; after they are dissolved into C12A7, they deoxidize Al and Ca. Increased capacity; second, the deoxygenated product is liquid and has a lower melting point than deoxygenated products formed by other combinations of elements. The overall deoxygenation capacity is increased by about 15 times. When the composite deoxidizer is dissolved, Ca, Al and [O] atoms in the solution are in contact at the same time. It is easy to collide and react, which promotes the formation of low-melting inclusions and overcomes the feeding of Al and CaSi wires. The disadvantages of early generation of deoxygenated products are not easy to remove, and the “effective†deoxidation of molten steel is to avoid the formation of pre-formed inclusions (Al2O3) that contaminate molten steel. According to the scanning analysis, the residual inclusions in the molten steel are spherical inclusions with high Al and Ca contents.
Effectively increase the deoxidation capacity of the main deoxidation elements in the composite deoxidizer, reduce the content of [Ca], [Al], and [O] in the molten steel, improve the purity of the molten steel, and reduce the consumption of deoxidation elements, that is, increase The deoxygenation efficiency of the element. Although the valence of deoxidizing elements did not change, the number of reactions increased. The deoxidation ability of Al in the composite deoxidizer is improved, and at the same time, the consumption of Ca is also reduced, and the total deoxidation ability increases to indicate that the balance is depleted, the line depleted, the depleted, the dissolved deoxidizing element content is reduced, and the deoxygenation efficiency is improved. It was shown that Ca increased the deoxidation ability of Al, and Al also compensated for the depletion of Ca depletion. It can be considered that the amount of dissolved Al and Ca is reduced at the same time as the amount of deoxidation increases in the contact droplet with [O]. A suitable composite deoxidizer is used to deoxidize the core wire, and the amount of Ca and Al is small and the amount of deoxidation is large. This is an effect produced by the composite deoxidizer having a higher deoxidation ability.
Facts have proved that calcium is an important element in the composite deoxidant, and calcium can be combined with various elements to form a multi-functional composite deoxidizer. The application of multi-functional composite deoxidizers based on calcium-based elements makes the molten steel more pourable and less prone to accidental clogging of large and medium-sized water outlets. The phenomenon of water outlets is not obvious, indicating that the product is suitable for production needs. To solve the problems existing in the current production to the maximum extent and effectively prevent nozzles from forming nodules.
In summary, during deoxidation of Ca and Al, Ca is an accelerator of Al deoxidation, a depletion (low consumption) depleting agent, and a modification agent for inclusions, which not only makes the production process smooth but also improves steel quality. Lower [O] also reduces costs, so Ca becomes an indispensable element in the steelmaking process.
From the perspective of the steelmaking process, the mixing of molten steel during tapping is a good stage for alloying and deoxygenation. Feeding the wire during the refining process is an important means of precipitation and deoxidation, and can achieve deep deoxygenation after Si deoxidation.
With the development of steelmaking production, the application of calcium in the refining production process has greatly increased. The reaction of calcium in the molten steel can effectively reduce and eliminate the hazards of some harmful elements (such as Se, Te, Sn, As, Sb, etc.). They form a compound with Ca in the reaction, thus reducing the harmfulness of the steel. The harm caused by the elemental collection. When deoxidized with Ca and Al, the average consumption of Ca and Al is about 95g and 75g. In 2007, the annual output of steel in China has reached more than 450 million tons. If the new technology is promoted, the output of steel by 10% (45 million) t) The use of metallic calcium consumes approximately 4.3 million tons of calcium per year. If 20% of steel production (90 million tons) is used, the annual consumption of calcium will reach about 90,000 tons, and the amount will be considerable.
According to the calculation, the comprehensive cost of the composite deoxidizer composed of Ca and Al in the refining and deoxidation process is 8 yuan less per ton of steel than when using only the Al element for deoxidation. This is a considerable figure. In the future work, it is crucial to continuously develop, develop, and design production requirements that are more in line with each steel grade. In response to this, various steel companies have also responded to the application of calcium-based series of deoxidizers, which has led to new levels of awareness, and has enabled calcium products to be widely used and developed in the steel-making world.
From the long-term production practice, it has been confirmed that the organic composition of the composite deoxidizer has achieved good results, and it also enhances the understanding of the composite deoxidizer. In the production practice of various steel grades, we still have the need to further improve the composition of the deoxidizer depending on the specific conditions. Designed a composite deoxidizer that meets the requirements of different steel grades and is easy to produce calcium-based alloys and multi-element alloys, maximizes the quality of steel, reduces the consumption of composite deoxidizer in all directions, reduces costs, and ensures the refining process and Continuous casting process goes smoothly.
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