Effect of temperature change on sulphuric acid-water glass slurry

Sulphuric acid-water glass slurry is a type of chemical slurry. The gel time of sulfuric acid-water glass slurry is affected by many factors. However, few researchers have addressed the influence of temperature. Through a series of laboratory tests, the viscosity and gel time of sulfuric acid-water glass slurry were studied at temperatures of 20, 30, 40, 50, 60, 70, and 80 degrees C, with sulfuric acid concentrations of 4.75, 5.0, 5.25, and 5.5%. In the tests, the viscosity of the slurry was reduced from 7 to 3 mPas with a temperature increase of 20-80 degrees C. Gel time increased before the temperature reached 40 degrees C. Above 40 degrees C, the gel time began to decrease. Different concentrations of sulphuric acid slurry resulted in various reactions at sudden temperatures. Abrupt temperature changes caused the slurry gel time to increase over the previous temperature; as the temperature continued to increase, slurry gel time began to decrease. The greater the concentration of sulfuric acid, the greater the strength of the gel, however, as the temperature increased, the strength of the gel decreased continually. Temperature thus has a major influence on the strength of the gel relative to the concentration of sulphuric acid.