Preparation method of high-efficiency corrosion-inhibiting coal or mineral powder transportation antifreeze

Abstract

The invention relates to a preparation method of high-efficient corrosion inhibition type anti-freezing fluid for coal or ore powder transportation. The preparation method comprises the following steps of: dissolving anhydrous calcium chloride in water to form a solution, adding a urea solution and a magnesium chloride solution after dissolution under stirring, and then sequentially adding solutions of composite corrosion inhibitor raw materials, including amino trimethylene phosphonic acid, zinc sulfate, triethanolamine, benzotriazol, sodium benzoate, cinnamic acid and the like. According to the preparation method disclosed by the invention, calcium chloride is taken as a main raw material of the anti-freezing fluid, urea and magnesium chloride are added for solving the problem of single component, and thus the performances of the anti-freezing fluid are more excellent; simultaneously, the non-toxic and harmless composite corrosion inhibitor components are provided, so that a formula system of the traditional anti-freezing fluid for coal or ore powder transportation is changed; and the high-efficient corrosion inhibition type anti-freezing fluid for coal or ore powder transportation, obtained by research and development, is in line with the technical conditions of the anti-freezing fluid for transporting TB / T3208-2008 bulk particle goods of ministry of railways, and has the characteristics of simple preparation process, good anti-corrosion effect, low production cost, nonflammable property, no toxicity, no odor, no taste and the like.

Description

technical field [0001] The invention relates to the technical field of antifreeze for coal or mineral powder transportation, in particular to a preparation method of high-efficiency corrosion-inhibiting coal or mineral powder transportation antifreeze. Background technique [0002] The moisture-containing coal or mineral powder transported in winter is easy to freeze in the vehicle, which brings great difficulties to winter transportation and unloading, and also causes huge economic losses to users such as railways, coal mines, ports or mineral powder and coal, seriously affecting vehicles. Turnaround and shipping efficiency. Over the years, many methods have been used at home and abroad to solve frozen coal unloading, such as vibration, blasting, electric heating, thawing storage, car body coating with paraffin and diesel, etc., but these methods are labor-intensive and costly, and have not fundamentally solved the problem. Frozen coal unloading problem. Experimental rese...

AI Technical Summary

Problems solved by technology

[0003] At present, the main trend of antifreeze research at home and abroad is the improvement of anti-corrosion performance; traditional antifreeze mainly uses anhydrous calcium chloride as the basic raw material, and the corrosion inhibitors used are sodium chromate, sodium dichromate, and sodium molybdate. , sodium tungstate, etc. These substances are too toxic and will cause great pollution to the environment and are not suitable for continued use

[0004] Nitrite is used as the main corrosion inhibitor of ferrous metals. It has excellent corrosion inhibition effect under the working conditions of calcium chloride antifreeze, and adding sodium nitrite to calcium chloride solution will lower the freezing point, so it is used Widely used in calcium chloride antifreeze; but nitrite has certain pollution to the environment, especially because of its carcinogenic effect, foreign countries have asked to stop using it