SU530000A1 - The method of desulfidization of the molten slag glass - Google Patents

Description

one

The invention relates to the glass industry and can be used to desulfidize melts, slag glasses.

Methods are known for removing sulfide sulfur, which consists in burning off its excess during glass melting by creating an oxidizing environment in the charge or in the furnace atmosphere and controlling the temperature-time regime.

A disadvantage of the known methods lies in the difficulty of controlling the redox environment in Schicht and the furnace atmosphere, the duration of the desulfidization process, as well as the impossibility of complete removal of sulfide sulfur.

The aim of the invention is to intensify the process of desulfidization of the molten slag glass.

This is achieved by the fact that the oxidation of sulfide sulfur in the slag glass melt is carried out with water vapor at a melt temperature of 1400-1500 ° C.

In these CONDITIONS, the water vapor of the interactions (it stews with sulfide and; (S), oxidizes it to 5 according to the reactions:

Mes - H.j, 0

MeO +

.

H, S is unstable under these conditions and decomposes to form,. Water vapor is fed directly into the melt. . In the indicated temperature range (140–15OO ° C), the treatment of water with a steam of melts of glasses does not lead to the formation of bubbles, since at the same time, the glasses amount to 40–15 poise

The required sulphide sulfur content is achieved by controlling the processing time of the slag glass melt.

The table shows the results of desulfidization of the molten slag glass composition, wt.% :. S-iO. 54-56; 6-8; CaO 21-23; MgO 3-4; ChlO 2-4; with an initial sulphide sulfur content of 0.40 wt.%. The tests were carried out in laboratory conditions, the molten slag glass was processed at different times with water vapor at a pressure of 0.02 atm at a temperature of 14OO-1450 ° C.

Processing time

Sulfide sulfur content, weight% per hour

0.400, 0.092 O, 046 0.016

As can be seen from the above table, the described method allows to drastically reduce

the amount of sulfide sulfur in glass, which makes it possible to more effectively provide the desired content of this com pent and increase the possible amount of slag in the charge (by 30–40%).

Claims (1)

Invention Formula The method of aesulfidization of slag glass melt by oxidation of sulfide sulfur during cooking, characterized in that, in order to intensify the process, o-oxidation is carried out with water vapor at 16 melt temperature of 1400-1500 ° C.