Due to the maintenance of the only turbine still in operation at the "Portovaya" compressor station, Gazprom stopped supplying gas through the Nord Stream 1 natural gas pipeline for three days from 4: 00 Moscow time on August 31.
Data provided by Nord Stream Natural Gas Pipeline Company, the operator of Nord Stream-1, show that the volume of gas transported by the pipeline has been reduced to zero. Gazprom said that the suspension of gas transmission will last until 4: 00 on September 3, and after the maintenance work is completed, the "Nord Stream-1" pipeline will be resumed without technical failure, when the daily gas delivery volume will be 33 million cubic meters.
The press secretary of the Russian president said on the 30th that European countries, the United States and Canada imposed sanctions on Russia, making it impossible for Russia to carry out routine maintenance and complete the registration and assembly of returned spare parts. apart from that, there are no other factors hindering Russia's supply of natural gas.
Because of the turbulent international situation, the supply and prices of many international bulk titanium carbide are still very uncertain.
Carbothermal reduction method
TiO2 is reduced by carbon black. The reaction temperature range is 1700-2100℃. The chemical reaction formula is as follows:
TiO2 (s) + 3C (s) = TiC (S) + 2CO (g).
Direct carbonization method
Ti powder reacts with carbon powder to form TiC. The chemical reaction formula is as follows:
Ti (s) + C (s) = TiC
Because it is difficult to prepare submicron metal Ti powder, the application of this method is limited, the above reaction can be completed in 5-20 hours, and the reaction process is difficult to control, and the reactants agglomerate seriously, so it needs further grinding to prepare fine TiC powder. In order to obtain a purer product, the fine powder after ball milling needs to be purified by chemical method.
Chemical vapor deposition
The synthesis is based on the reaction between TiCl4, H2, and C. The reactant reacts with the hot tungsten or carbon monofilament, and the TiC crystal grows directly on the monofilament. The output and sometimes even the quality of the TiC powder synthesized by this method are strictly limited. In addition, due to the strong corrosiveness of TiCl4 and HCl in the product, special caution should be taken in synthesis.
The invention relates to a method for preparing small particle size products by fully mixing and dispersing materials with the help of solution. It has the advantages of good chemical uniformity, small particle size and narrow distribution, low heat treatment temperature, but complex synthesis process and large drying shrinkage.
Using nano-TiO2 and carbon black as raw materials, the material was heated by microwave energy based on the principle of carbothermal reduction reaction. In fact, using the dielectric loss of the material in the high frequency electric field, the microwave energy is converted into thermal energy, and the nano-TiO2 and carbon are synthesized into TiC.
Explosive impact method
Titanium dioxide powder and carbon powder were mixed in a certain proportion, and the precursor was prepared by pressing into a Φ 10mm × 5mm cylinder with a density of 1.5g/cm3, which was packed into a metal confined outer cylinder in the laboratory. The experiment was carried out in a self-made airtight explosion container, and the detonation ash was collected after the action of explosion shock wave. After preliminary screening, large impurities such as iron shavings are removed to get black powder. The black powder turned brown after being soaked in aqua regia for 24 hours, and finally put into muffle furnace and calcined 400min at 400℃ to get silver gray powder.
High frequency induction carbothermal reduction method
The pigment grade titanium dioxide powder and charcoal powder were weighed and mixed at 1:3 and 1:4, then added to the ball milling tank and milled for 6 hours on a planetary ball mill at a rotational speed of 300~400r/min, then the ball milling material was pressed into a 2cm × 2cm~2cm × 4cm block on a pressing machine, and finally the material was loaded into a graphite crucible and put into a high frequency induction heating equipment. Argon gas was used to protect the atmosphere. Gradually adjust the current of the high-frequency induction equipment to 500A to make the material have carbothermal reduction reaction and keep 20min. After the heat preservation, the reduction product is naturally cooled to room temperature in argon atmosphere, and the reduction product is taken out. After grinding and crushing, the ultra-fine titanium carbide powder is obtained.
Metal thermal reduction method
The solid-liquid reaction method is an exothermic reaction, so the reaction temperature is low, the energy consumption is low, but the raw material is more expensive, and the CaO and MgO in the product are pickled and can not be recycled.
High temperature self-propagating synthesis
The SHS method is derived from exothermic reaction. When heated to a proper temperature, the fine Ti powder has very high reaction activity, so once ignited, the combustion wave generated through the reactants Ti and C will have enough heat of reaction to form the TiC, SHS method, usually less than a second. The synthesis method requires high purity and fine Ti powder as raw material, and the output is limited.
Reaction ball milling technique
Reactive ball milling is a technology to prepare the required materials by using the chemical reaction between metal or alloy powder and other elements or compounds in the process of ball milling. The main equipment for preparing nanomaterials by reactive ball milling technology is high energy ball mill, which is mainly used to produce nanocrystalline materials. The mechanism of reactive ball milling can be divided into two types: one is mechanically induced self-propagating high temperature synthesis (SHS) reaction, and the other is reactive ball milling without obvious exothermic reaction, and the reaction process is slow.
Titanium carbide Price
The price is influenced by many factors including the supply and demand in the market, industry trends, economic activity, market sentiment, and unexpected events.
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Titanium carbide Supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted Titanium carbide manufacturer and TiC supplier with over 12-year-experience. We ship our goods all over the world.
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After Ukraine confirmed that it had received transit transportation fees paid by Hungary and Slovakia, Russia resumed the delivery of oil from the southern route of the "Friendship" pipeline to Hungary and Slovakia on August 10.
The Hungarian oil and gas company said that after negotiations with Ukraine and Russia on resuming the southern route of the "Friendship" pipeline, the company paid transit fees for the Ukrainian section of the pipeline, and the southern line of the "Friendship" pipeline has been restarted.
Rosneft issued a notice saying that since August 4, Ukraine has banned Russian oil from the southern route of the "Friendship" pipeline in Ukraine to Hungary, Slovakia and the Czech Republic. Due to financial sanctions imposed by the European Union, the company was unable to pay transit fees to Ukraine, which had been refunded. The Ukrainian Oil Transport Company decided to stop providing oil transport services on the grounds that it had not received transit fees.
The Friendship pipeline starts in Samara state in southwestern Russia, with the northern route to Germany and Poland via Belarus and the southern route to the Czech Republic, Slovakia and Hungary via Ukraine.
Luoyang Tongrun Nano Technology is a trusted chemical manufacturer and supplier providing high-quality chemicals and Nanomaterials. If you are looking for the titanium carbide, please feel free to contact us and send an inquiry.
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