In August, the domestic steel market price rose, leading to a gradual resumption of production in the previous period, and the iron ore demand increased slightly. In addition, the miners misjudged the sale and pushed the iron ore spot price in terms of demand. In late August, the domestic steel price rose weakly. In addition, the continuous rainy weather in the country made the steel transportation inconvenient and the construction site difficult, which suppressed the upward trend of domestic steel prices. Iron ore lost its downstream support and it also fell. But overall, iron ore prices are still rising this month.
At the end of the month, the price of Shandong Port was temporarily stabilized. At present, the price of 63.5% of the spot price still needs to be around 1150 yuan/ton. The transaction volume is scarce. Most of the price is still the buyer's bid, and the price of pb powder and low-grade printing powder are lowered.
Aftermarket: With the energy conservation and emission reduction of factories in Shanxi, Jiangsu and Hebei, the implementation of production suspension and production restrictions will have a negative impact on the imported iron ore market. It is expected that the iron ore spot market will decline slightly in September.
News: On August 27th, another international mining giant, Brazil's Vale, has taken the lead in announcing plans to cut iron ore prices by 10% in October, from $150 per ton to $135. This is also the first time the iron ore price has been lowered this year. For reasons of price cuts, Vale said that this is mainly due to changes in Chinese demand. Data show that in the first half of this year, China's iron ore imports fell by 25.14% compared with the same period of the previous year, and the import decline continued throughout the second quarter, with June's largest decline in June, reaching 14.72%. The decrease in external dependence of iron ore in China is mainly due to the increase in domestic iron ore production. It is reported that in the first half of this year, China's domestic iron ore output reached 485.03 million tons, an increase of 28.1% year-on-year, while the second quarter increased by 37.61% compared with the first quarter.
On September 2, foreign media quoted Sam Walsh, chief executive of iron ore business of international mining giant Rio Tinto, as saying that iron ore prices in the fourth quarter are expected to fall by about 13.3% from the third quarter. Excluding shipping costs, Rio Tinto expects the price of iron ore in the fourth quarter to drop to $127 per tonne.
The structure of the core barrel is generally divided into single - acting double core tube and most of the fishing apparatus. The double tube section consists of an outer tube assembly and an inner tube assembly. The outer pipe assembly includes; The main structure and working principle of the cartridge stopper, cartridge chamber, stable joint outer pipe, diamond reamer and diamond bit are as follows:
(1) Spear structure is composed of spear head and recovery spring. When coring, the fishing device is lowered to the upper part of the inner tube assembly in the drill pipe, and the fishing hook grasps the fishing spear, lifts the fishing device up, picks up the recycling card barrel, and inwardly compressing the cartridge card, so that the inner tube assembly and the outer tube are separated, so that the inner tube assembly is lifted up.
(2) The clip structure is mainly composed of the clip frame, clip, spring and other components. Its function is that when the inner tube sits on the outer tube, the clip expands with the help of the elastic force of the expansion spring and sticks to the inner wall of the clip chamber, so that the drilling tool can achieve positioning.
(3) Buffer structure by spring, locking mother, split pin composition. Protecting the inner tube when pulling the core.
(4) Single action structure is realized by two pairs of thrust bearings.
(5) Adjust the length of the inner pipe assembly and the outer pipe assembly of the structure, and fine-tune the lower shaft and the locking mother to achieve the gap required by the end of the spring seat and the step inside the drill bit.
(6) The fishing structure, also known as the fishing device, is mainly composed of fishing hook, hammer and safety rope. The fishing hook is used to hold the spearhead while fishing the inner pipe, and the weight is used to speed up the fishing device's descent to save fishing time. The safety rope is a thin rope. When the inner pipe is stuck for some reason and cannot be lifted, the safety rope can be forcefully lifted and then the drill can be lifted.
Other Parts,Spearhead Base,Compression Spin,Core Lifter
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