Brief description of the technological process
BASIC RAW MATERIAL: Mercantile wheat of standard quality. Mercantile wheat of standard quality is transported, purified through silos aspiration devices, and housed inside silos cells. Mercantile wheat is prepared through a combination of state of the art technological parameters and transported to the mill by elevators and chain conveyers. Inside the mill the ground mixture is subjected to black cleaning, conditioning, white cleaning and final conditioning. After a period of resting, the ground mixture is ready for grinding.
Technological stages of grinding are as follows:
- gritting
- semolina sorting
- selvage sorting
- extraction
The grinding process is consisted of several mechanical operations:
- grinding
- grind sorting according to size
- semolina sweeping
- barn sifting
- sifting of pressed grind particles
Grinding and sorting of grind according to size are consequent operations and make up one stage. Grinding is conducted by rollers, while sorting is done on planned sieves. Semolina sweeping is an operation which follows after sorting of the grinds during the stages of grinding and sorting on the semolina sweepers. Barn sifting is an operation which is conducted on the last stages of grinding when the endosperm particles, which could not be separated during regular sorting, are shaken off from the shell. Machines which are used in barn sifting are called vibrating sieves.
Finished grinding products are:
- type flour
- plain or all-purpose flour
- enriched flour
- corn meal
- barn
Type flour is produced by mixing and homogenization of flour mill streams through a specific process. Flour standardization is conducted on the basis of mineral content. Depending on the mineral content the flour is classified in white, semi-white and brown.