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According to the monitoring of the business community, the domestic iron ore market has been lightly traded in the past week, and the price of imported ore has shown a downward trend. The market price of 62% printing powder in Rizhao Port of Shandong was RMB 1008/ton at the beginning of last week, and fell to RMB 988/ton at the weekend, a decline of about 1.98%. The decline in iron ore prices was mainly due to the recent expansion of the loss of the steel industry. The “severe winter†of steel from the end of last year is far from showing signs of fading. Most steel mills are at a loss, and some steel products cannot be maintained even for gross profit. Since the fourth quarter of last year, steel mills have continued to cut production. According to the China Steel Association, the average daily crude steel output in the middle of February was 1.699 million tons, which has been lower than the historical high of 1.945 million tons last year. Since last year, large steel companies including Baosteel, Wuhan Iron and Steel, Anshan Iron and Steel, Hebei Iron and Steel Group have incorporated the development of non-steel industry into an important strategic level of enterprise development. At present, the situation of oversupply of iron ore has begun to emerge. With the massive release of China's self-produced iron ore production capacity and the release of overseas investment in equity and mining capacity over the past two years, China's demand for imported iron ore has weakened, and the dependence on China's iron ore demand is declining. At present, the inventory of iron ore in China's ports has reached 10.66 million tons. Chen Kai, an iron ore analyst at the business division's steel branch, expects that domestic steel market demand will further weaken this year, and the price of imported iron ore will remain low and volatile in the short term.
Aluminum doors are doors with aluminum alloy as the frame and inlaid glass. The following is its relevant introduction:
1. Structural composition
Aluminum alloy frame
The aluminum alloy frame provides a stable support structure for aluminum doors. Aluminum alloy has the advantages of high strength, light weight, and corrosion resistance. Its profiles can be made into various shapes and sizes according to different design requirements, such as common squares, rectangles, etc., and can be anodized, powder sprayed and other surface treatments to achieve beautiful and durable effects.
Glass part
Glass is an important part of aluminum doors, with functions such as lighting and transparent vision. According to different needs, ordinary transparent glass, frosted glass, tempered glass, hollow glass, etc. can be selected.
Ordinary transparent glass has good light transmittance, but its safety and heat insulation and sound insulation performance are relatively poor. Frosted glass can protect privacy to a certain extent and is suitable for places with certain privacy requirements, such as bathrooms. Tempered glass has high strength, blunt-angle particles after breaking, good safety, and is often used in public places or places with high safety requirements. Hollow glass has better heat insulation and sound insulation performance, and is suitable for places where the indoor environment needs to be kept comfortable.
2. Types
Sliding aluminum door
This type of door uses tracks and pulleys to push and pull the door leaf left and right. Its advantages are space saving and easy operation. It is suitable for places with small space or not suitable for swing door opening, such as partitions between balconies and indoor areas, entrances and exits of small shops, etc. However, the sealing performance of sliding aluminum doors is relatively weak, and it may not be as good as swing doors in terms of sound insulation, heat insulation and preventing dust from entering.
Swing aluminum door
Swing aluminum doors are connected by hinges and can be opened inward or outward. It has good sealing performance and can effectively block dust, rain, noise, etc. from the outside. The safety of swing doors is also high, and they are suitable as entrance doors for residential buildings or partition doors between indoor rooms. However, swing aluminum doors need to occupy a certain space when opened, and have certain requirements for the surrounding space.
3.Advantages
Aesthetics: The transparency of the glass of the aluminum glass door can make the space appear more open and bright, and has a high decorative value.
Strong and durable: The aluminum alloy material has high strength and is not easy to deform, which can ensure the long-term use of the door.
Good sealing: The aluminum glass door can effectively block the dust, noise and temperature changes from the outside.
Corrosion resistance: The aluminum glass door can adapt to different environmental conditions and is not easy to rust.
In commercial places such as shopping malls and office buildings, aluminum glass doors are often used in storefronts, office partitions, etc.; in homes, they are also commonly seen in areas such as balcony doors and kitchen doors.