SU791594A1 - Method of liquid glass production - Google Patents

Description

The invention relates to the field of the preparation of inorganic substances, namely, to the technology of silicates, and can be used to obtain liquid glass from vitreous alkali silicates. The autoclave method of producing liquid glass is known by treating a mixture of pieces of silicate lump with water with high-pressure steam in auto clavs and a non-autoclaved method of producing liquid glass by treating fine powder of silicate lump with heated water under atmospheric pressure Llj. silicate lumps and water in a ball mill when heated 12. By a known method, liquid glass is produced by dosing a silicate lump into a ball mill and heated to 40-50 from water in a weight ratio of 1: 1, followed by joint grinding and dissolving of the components for 36 hours. However, a substantial method of obtaining liquid glass does not ensure complete transfer of the starting components to the dissolved state and / has a long process time (36h). The aim of the invention is to accelerate the process and increase the yield of the target product. The goal is achieved by processing at a temperature of 90-100 ° C in the presence of urea, the latter being used in an amount of 0.05-0.15% by weight of the silicate lump. For example, a ball mill was charged with 1320 kg of silicate clumps, 2000 kg of water was poured at a temperature of EVS, and 0.924 kg of urea was introduced. After the start of the mill the first 3-4 hours, grinding of the silicate lumps and stabilization of the dissolution regime takes place, and in the next 2-3 hours - rapid dissolution with the release of heat and the creation of a slight overpressure. The total cycle does not exceed 5-7 hours and depends on the amount of water loaded, causing a predetermined density of liquid glass. Table 1 shows the comparative data of the known and proposed methods. As can be seen from table 1, the cycle time for the proposed method is reduced from one and a half days to 5-7 hours, i.e. equipment productivity increases by 5-7 times,. and the yield of the finished product increases by 5-13%.

Table 2 shows the dependence of the duration of silicate lly dissolution on temperature.

From Table .2, it can be seen that the cycle time decreases with increasing temperature.

The use of the invention provides, in comparison with the known method, the possibility of producing liquid glass with a given density, a sharp increase in the productivity of equipment, an increase in the yield of the finished product.

Table

1: 1

Famous

0.05-0.15%

urea by weight

silicate clumps

Claims (2)

1. A method of producing a liquid glass by treating silicate clumps and water in a ball mill with heating, characterized in that, in order to speed up the process and increase the yield of the target product, the treatment is carried out at a temperature of 90-100 seconds in the presence of urea. 40-50 85-90 36 Table 2 95-98 7 6 95-98 95-98 2. The method according to claim 1, characterized in that the urea is used for an amount of 0.05-0.15% by weight of the silicate lump. . Sources of information taken into account in the examination 1. Matveev MN and others. Soluble glass. M., 1956, p. 25-28. 2. Referential map VNIIESM, 55, 1977, series 7 (prototype).