Mixing and Uniformity of Enamel Frit Batch Materia

The batch material of enamel glaze is made by mixing various raw materials with different properties and different functions. In order to make the various raw materials play a full role in melting and ensure the complete reaction of the enamel glaze, when the batch materials are mixed, the components must be evenly distributed to ensure the melting quality of the enamel.
There are two methods for mixing enamel and glaze batch materials: manual mixing and mechanical mixing.

Manual mixing should be layered and tiled. The first layer is a mixture of quartz, borax, feldspar, etc., and the second layer is a mixture of borax, fluorite, sodium nitrate, adhesive (or pigment, opacifier), and quartz. A small amount of adhesive or colorant should be mixed with 3 to 4 times the weight of sodium carbonate or borax before laying.

The manual mixing of enamel and glaze batch materials must be mixed with two sieves to achieve the purpose of uniform mixing. Manual mixing has been basically eliminated because of its high labor intensity, impact on human health, and easily cause occupational diseases.

The mechanical mixing of enamel and glaze batch materials mainly uses a double-wheel rolling mixer, which uses two rollers in the mixing bin to roll the raw materials, and two scrapers are used for mixing. V-type mixer and double cone mixer can also be used to ensure that the raw materials are free from agglomeration. The mixing efficiency and effect of such mixers are even better.

Mechanical mixing reduces the labor intensity of workers, reduces the flying of dust, and greatly improves labor productivity. It has been widely used.

For mechanical mixing, the double-wheel rolling mixer should be a dedicated machine. If one machine is used for multiple purposes, when changing different types of enamel and glaze batches, the shovel of the mixer must be shoveled and washed with quartz sand. . If it is a V-type mixer or a double-cone mixer, because there is no heavy stone wheel in the silo to roll the enamel and glaze batch material and stick to the inner wall, it is much more convenient to clean up when changing the mixed material.

The uniformity of the batch mix of enamel and glaze is related to the following three factors:
1. If the raw material has a large dispersion, the mixing will be uniform. If the raw material is agglomerated, it should be crushed in advance and then poured into the mixer.
2. The water content of raw materials must be controlled within the specified range.
3. After all the raw materials are poured into the mixer, the mixing time must meet the process requirements.

The uniformity of batch mixing must be determined regularly. The methods of determination include dissolution method, titration method, sieving method and magnifying glass observation method. Most enamel factories use the titration method, which is simple, fast and accurate. Generally speaking, the uniformity of enamel and glaze batch is more than 96% as qualified.