A snow removal and deicing agent, which is made by mixing calcium chloride, a by-product of alkali production with seawater and limestone, and halogen powder whose main component is magnesium chloride, salt ballast or high and low temperature salts whose main component is sodium chloride. Obtain, among them, calcium chloride is, magnesium chloride, sodium chloride, etc. Its advantages are low cost, good snow-melting effect, suitable for use in alpine areas, and the usage amount is 1/2-1/5 of existing snow removal agents.

The freezing point of salt water is lower than that of pure water. If you want to melt the accumulated ice and snow in an environment where the temperature is below 0 degrees, a common method is to spread salt, so that the melted snow water contains salt and is not easy to refreeze, and the ice and snow on the contact interface can Continuously melting in, as long as you sprinkle enough salt, you can slowly turn the accumulated ice and snow into water

It is to increase the number of condensation nuclei, which is similar to the principle of artificial rainfall. Dry ice (solid carbon dioxide) absorbs heat when it melts, which can lower the temperature and increase the supersaturation of water vapor in dark clouds. Another function is to provide condensation nuclei to turn water vapor into raindrops.

The other is the boiler. Some porcelain tiles are usually placed inside to provide condensation nuclei. Without these tiles, the water temperature in the boiler will be very high and it will not turn into bubbles for heat dissipation. The water temperature may be much higher than 100 degrees, eventually causing an explosion.

If there is no salt, the ambient temperature will not melt easily even if it is above 0 degrees. After salt is sprinkled, condensation nuclei will be provided, and the temperature will start to melt slightly above 0 degrees. In addition, the melting point of salt water solution is average. Both are below 0 degrees. The combination of the two factors makes it easier to melt snow by spreading salt.

Spreading snow melting agents is often called "spreading salt" because the main ingredients of snow melting agents used to be chlorine salts, such as sodium chloride (the same ingredient as table salt), calcium chloride, magnesium chloride, etc. , so the snow melting agent was once called "ice melting salt". At present, chlorine salt snow melting agents are used more frequently in countries around the world.

The freezing point of chloride salt solution is lower than that of water. Taking sodium chloride as an example, the freezing point of sodium chloride with a concentration of about 35% and the freezing point of the solution is minus 19 degrees Celsius, and the sodium chloride solution with a concentration of 20% The freezing point is minus 10 degrees. Sprinkle sodium chloride solid particles or a certain concentration of sodium chloride solution into the snow. As sodium chloride dissolves and releases heat, the snow will melt.