Special emulsified oil for coal mine hydraulic support, high lubrication anti rust type, suitable for fully mechanized mining equipment

Description :

  Emulsified oil for coal mine hydraulic supports is a semi synthetic or fully synthetic working medium designed specifically for hydraulic systems in underground fully mechanized mining faces. It mainly solves the problems of corrosion, insufficient lubrication, and aging of seals in hydraulic supports under high pressure, heavy load, and humid environments. This product mixes base oil with water through emulsification technology to form a stable oil in water lotion, which not only retains the lubricity and rust resistance of mineral oil, but also has the flame retardancy and cooling property of water. Typical working conditions include supporting, pushing, and adjusting operations on longwall fully mechanized mining faces, suitable for various electro-hydraulic control systems and column jacks, ensuring sensitive support and reliable support, and is a key consumable for ensuring coal mine safety production.

  This emulsified oil is usually blended with deeply refined base oil, composite emulsifiers, rust inhibitors, extreme pressure anti-wear agents, defoamers, and other additives. The appearance is mostly light yellow to brown transparent liquid, without mechanical impurities. Its core indicators include emulsion stability, rust resistance, and lubricity, which comply with industry standards such as MT/T 76-2011 "Emulsified oils, concentrates, and high water content hydraulic fluids for hydraulic supports". The typical usage concentration is 3% -5%, and the prepared emulsion appears milky white. The pH value is usually controlled between 7.5-9.5 to ensure low corrosiveness to metal components. The product needs to pass the hard water adaptability test to ensure that the lotion is still stable in the high salinity mine water, without stratification and oil separation, and meet the long-term use requirements under the complex water quality conditions underground.

  When selecting, it is important to distinguish between the application scenarios of emulsified oil and high water content hydraulic fluid. Emulsified oil needs to be diluted with water on site, which has a relatively low cost and is suitable for most conventional coal seam mining; If the water quality in the mine is extremely hard or has extremely high requirements for fire resistance, special formulas with stronger resistance to hard water can be considered for use. Not applicable scenarios include non coal mine hydraulic systems or ground precision hydraulic equipment with special restrictions on environmental emissions. Compared with ordinary mechanical lubricants, emulsified oil emphasizes good compatibility with water and flame retardant properties, and cannot be directly used as a substitute for pure oil. When purchasing, it is necessary to confirm whether the product has the Coal Safety Mark (MA certification) and verify the testing report provided by the supplier to ensure that the flash point, viscosity, and corrosion test data meet the actual working conditions of the mine.

  Attention should be paid to the preparation process during use. It is recommended to use an automatic proportioning device or a strict manual mixing program. First, add the emulsified oil to water and stir thoroughly to avoid uneven emulsification caused by reverse operation. Daily maintenance requires regular testing of the concentration, pH value, and hardness of the emulsion. A low concentration can lead to a decrease in lubrication and rust prevention performance, while a high concentration can increase costs and easily clog the filter element. The typical replacement cycle depends on the degree of downhole pollution. It is generally recommended to test the physical and chemical indicators once a quarter. If the lotion is found to be black, smelly or seriously stratified, it should be replaced immediately. Common failures, such as slow support movement, are mostly caused by lotion pollution or filter element blockage, so the oil tank and pipeline should be cleaned in time to prevent microbial breeding leading to system corrosion and ensure long-term stable operation of the hydraulic support.

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