Process and device for producing sodium silicate

Abstract

The invention discloses a process for producing sodium silicate. The process comprises the following steps of: 1) mixing quartz sand and sodium carbonate in proportion and stirring to form a mixture; 2) uniformly conveying the mixture into an electrode furnace, heating to 1400-1500 DEG C and melting by an electric arc or a plasma arc generated by an electrode arranged in the electrode furnace to generate liquid-state sodium silicate and CO2; and 3) forming the finished product by using the liquid-state sodium silicate according to a water quenching method or a dry method. The invention further discloses a device for producing sodium silicate. According to the process and the device for producing sodium silicate disclosed by the invention, sodium carbonate and high-quality quartz sand are heated and melted by the electric arc or the plasma arc generated by the electrode to form a high-temperature liquid material, thus achieving the advantages of low energy consumption, accurate temperature control, good product quality, low raw material loss, low environmental pollution and high production safety.

Description

technical field [0001] The invention belongs to the technical field of metal silicates, and particularly relates to a process and a device for producing sodium silicate. Background technique [0002] At present, the common dry production process of sodium silicate on the market uses soda ash and high-quality quartz sand as raw materials. After removing part of the water in the sand silo, the quartz sand with uniform water enters the receiving port, and is sent to the silo through the elevator. , enter the sand alkali weighing hopper through the vibrating hopper vibrating feeder, after weighing, enter the mixer, after mixing evenly, send it to the silo in front of the furnace through the mixing belt conveyor and elevator, and enter the hopper through the wrap-in feeder. Horseshoe flame kiln, through the high temperature generated by gas combustion, at 1300 ~ 1500 ℃, through a series of complex chemical and physical reactions, forming a high temperature liquid material of 1100...

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Problems solved by technology

[0002] Soda ash and high-quality quartz sand are used as raw materials in the dry production process commonly used for sodium silicate in the market. After removing part of the water in the sand warehouse, the quartz sand with uniform water content enters the receiving port and is sent to the silo by the elevator. , enter the sand and alkali weighing hopper through the vibrating hopper vibrating feeder, after weighing, enter the mixer, after mixing evenly, send it to the front silo through the mixing belt conveyor and elevator, and enter The horseshoe flame kiln, through the high temperature generated by gas combustion, at 1300-1500 ℃, through a series of complex chemical and physical reactions, forms a high-temperature liquid material at 1100-1200 ℃, like molten glass, and forms a solid product after molding. The existing sodium silicate production process is extremely dangerous. Because gas and air are mixed with high temperature, it is easy to explode, and the explosion limit is very wide. Therefore, the oxygen content in the gas is required to be less than 1% in the horseshoe flame kiln, and it should be avoided during operation. Mixing gas and air, in addition, there are defects such as high energy consumption, difficult temperature control, poor product quality, large loss of raw materials and environmental pollution.

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