Dissolving sodium silicate production control condition

Dissolved sodium silicate speed depends on three factors, namely the difficulty of ion exchange process, the strength of the surface layer silane drunk group, and alkali metal ions by the rate of surface diffusion. In the general case dissolving speed of sodium silicate is mostly depends on the molecular ratio, water consumption, granularity, divalent and trivalent metal oxide impurities, temperature and pressure and dissolving sodium silicate.

1, the influence of the molecular ratio when dissolved sodium silicate degrees: because of sodium silicate in molecular ratio determines the percentage content of sodium oxide and silicon dioxide, when the water glass alkali content in the molecular ratio 1:2 is large, it is easy to dissolve in cold water or hot water sodium silicate, but when the silicon content is more than 1:2, even in boiling water, some alkali leaching by dissolving sodium silicate slowly, so the dissolution of sodium silicate sodium silicate speed is proportional to the alkali content, and is inversely proportional to silicon content. As in the same condition, the Na o. the SiO 2.4: than Na2O. 3. 8 Si enemies easily dissolved sodium silicate.

2, the influence of the water dissolved sodium silicate degrees when child: join the water when dissolved sodium silicate, sodium ion concentration is big, dissolved sodium silicate is easy. So an water glass pieces can not be used more than three servings of water, so as to avoid alkali leaching by left a large number of high silica residue. According to our production practice, generally USES 3 tons of neutral sodium silicate pieces join 6 tons of water is good.

3, a coarse when dissolved sodium silicate degrees: the influence of sodium silicate particles of the thinner, and the greater the contact area of the solvent, the faster the dissolved sodium silicate in the boiling water. In atmospheric water glass powder optimum grain diameter of 0.3 and 0.8 mm.

4, divalent and trivalent metal emulsify material impurities dissolved sodium silicate degree of the influence of foreign material content in the solid sodium silicate is lower, the more easily dissolved sodium silicate in water. Divalent and trivalent metal oxide (RO and R: O3) can significantly reduce the solid impurities dissolved sodium silicate velocity of sodium silicate. This particularly pronounced for low modulus sodium silicate. When sodium silicate in RO ten R, O, content of more than 5%, soluble sodium silicate is a virgin.

5, the influence of temperature on the dissolved sodium silicate: in certain dissolved sodium silicate solid Hugh sodium silicate in time is not A pressure dissolved sodium silicate as the temperature increases. When the water temperature at 20 ℃, due to the hydrolysis, soluble in water, mainly by Na blade and SiO2 is dissolved sodium silicate. With the improvement of water temperature, the concentration of sodium oxide in the solution to improve, accelerate colloid the SiO, sodium silicate, the dissolution of the solution of the SiO: content is increased. When the water temperature rise to about 1000 c, content is close to the solid sodium silicate in the Sio, content.

6, the influence of pressure on the dissolved sodium silicate: various modulus of sodium silicate sodium silicate speed is proportional to the pressure, the dissolution of general dissolved sodium silicate Na3O. 3.3 the SiO: neutral sodium silicate pieces need to be operating pressure is 4 kg, pressure of about 40 minutes.