Lubricating grease for underwater spindle noses of iron-making auger conveyors and preparation method

Abstract

The invention relates to lubricating grease for underwater spindle noses of iron-making auger conveyors and a preparation method. The lubricating grease comprises base oil, densifiers, viscosity index improvers, extreme-pressure antiwear agents and antirust agents. The preparation method includes adding composite soap, namely the densifiers, and 45-55% of the base oil into a reaction kettle, stirring and heating to the temperature of 220-230 DEG C, keeping the constant temperature for 25 minutes, adding 10-20% of the base oil for cooling, continuing to stir, adding the residual base oil, stirring to cool the temperature to below 70 DEG C, adding additives, and stirring and mixing evenly, wherein the mass ratio of lithium 12-hydroxystearate to calcium 12-hydroxystearate to lithium octanedioic acid in the composite soap is 3:1:1. The lubricating grease prepared according to the preparation method has high dropping point, and friction and abrasion of lubricated portions are reduced during work under certain heavy load conditions; the lubricating grease has good waterproofing performance and good salt mist and rust resistance performance; the condensation point of the base oil is low, and a certain pumping performance of the lubricating grease is guaranteed; high-temperature loss of the lubricating grease is avoided, and extreme-pressure antiwear performance, salt mist and rust resistance performance, water-adding anti-shearing performance, pumping performance and the like of the lubricating grease are realized.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and relates to a lubricating grease for an underwater shaft head of an ironmaking cage stirring machine and a preparation method thereof. Background technique [0002] After the blast furnace slag is separated from the molten iron, it enters the slag granulation area through the slag ditch, and the high-speed water flow ejected from the slag punching box makes the slag water-quenched and granulated to cool. After the slag is further granulated and buffered in the water slag ditch, it flows into the cage stirring tank equipped with a water slag separator and a cage stirring machine. dry residue. The popularized Minte method water slag treatment system is an environmental protection equipment. [0003] Cage stirrer is the key equipment for iron-making slag treatment in Mingte method. Compared with the traditional sedimentation method slag treatment device, it has the following characte...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of lubricating grease for the underwater shaft head of the iron-making cage stirring machine. By selecting the appropriate base grease and additives, the lubricating grease can meet the requirements of high temperature non-loss, extreme pressure anti-

Images