Sodium Silicate Production Plant:There are two processes for
preparing water glass that are common this day. The first one is by
reaction in liquid phase while the next one is by reaction in solid
phase. However, alkaline and quartz sand are the same raw materials
used in the two processes. 1. Process with reaction in liquid phase: Caustic soda, quartz sand
and water are mixed in a mixing tank, and then the mixture is fed
into a reactor, where steam is introduced. The reactant is liquid
water glass with its module lower than 3. The reaction is as
following: nSiO2+2NaOH Na2O SiO2+H2O 2. Process with reaction in solid phase (thermal process) The feed
materials in this process are sodium carbonate and quartz sand, or
sodium sulfate and quartz sand. The feed materials are heated in a
reflection furnace. The reaction is as following: Na2CO3 +XSiO2 →
(Na2O)?SiO2)X + CO2 4Na2SO4 +2C +4SiO2→ 4Na2SiO3 +4SO2 +2CO2 The
water glass produced by this thermal process can have modules
depending on requirements for different applications.