Preparation method of self-bonding and pre-decomposing glass batch

Abstract

The invention provides a preparation method of a self-bonding and pre-decomposing glass batch. The method comprises the following steps of: pre-decomposing carbonate out of a kiln so as to obtain slaked lime and periclase, then mixing with other glass batch in a proper proportion in a mixing machinery, adding 8-20wt% of water during the mixing process, then pelletizing the mixed batch, standing for more than 72hours, and hardening by hydration to finally obtain the pelletized glass batch with a certain strength. According to the preparation method, the decomposing process of the carbonate is finished out of the kiln, thus the heat consumption can be greatly reduced; the lower limit of the grain size of the raw material is not required, and thus the resource can be used furthest; the cost of the raw material is reduced by adopting the light soda ash; and the pelletizing of the glass batch can be achieved without using an external bonding agent. Therefore, the preparation method has the advantages that the melting rate is improved, the melting temperature is reduced, the melting efficiency is high, and the like.

Description

technical field [0001] The invention relates to a method for preparing a glass batch material, in particular to a method for preparing a self-adhesive and pre-decomposed glass batch material. Background technique [0002] Traditional glass batch materials are in bulk form, that is, quartz sand, feldspar, dolomite, limestone, soda ash, Glauber's salt and other raw materials with a certain particle size are mixed in proportion and then fed into the melting furnace in a loose state. Melting job. There are many disadvantages in this process, for example: (1) The materials are piled up in the kiln, the heat transfer area is very small, and the heat transfer coefficient is not high. (2) Dust flying in the kiln causes the kiln body to erode and block the regenerator. (3) Stratification (or segregation) is prone to occur in the process of transportation, storage, and unloading to destroy the uniformity of mixing. (4) A large amount of air is brought in to produce microbubbles tha...

AI Technical Summary

Problems solved by technology

There are many disadvantages in this process, for example: (1) The materials are piled up in the kiln, the heat transfer area is very small, and the heat transfer coefficient is not high

(2) Dust flying in the kiln causes the kiln body to erode and block the regenerator

(3) Stratification (or segregation) is prone to occur in the process of transportation, storage and unloading, which will destroy the mixing uniformity

(5) A large number of resources are not effectively used

In order to prevent flying materials after entering the kiln, stricter requirements are put forward for the particle size composition of raw materials. The content of particles smaller than 0.1mm in quartz sand cannot exceed 5%, which means that more than 30% of fine powder has to be separated out, resulting in waste of resources

(5) The decomposition of carbonate is carried out in the furnace, resulting in high energy consumption

Although this method is also decomposed outside the kiln, the disadvantage is that, first, preheating all raw materials at the same time is not conducive to energy saving

The proportion of carbonate minerals in the glass batch is only about 20%. Decomposing them outside the kiln together with other silicate minerals that do not undergo decomposition reactions will increase unnecessary energy consumption

The second is that the pre-pressed balls will make the carbonate particles wrapped in it, and the heat transfer area is limited, which seriously restricts the heat transfer and mass transfer.

According to the traditional method of feeding into the melting furnace in bulk, the content of fine powder in glass raw materials needs to be strictly controlled, so that about 30% of the resources are not used, which not only wastes resources, but also creates new environmental pollution.

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