Flour mill

ELEMENTS OF MECHANICAL ENGINEERING

HOW STUFF WORKS

FLOUR MILL

Introduction

Flour mills are the among the most traditional unit.

Flour mill is a unit operation designed to break a solid material into smaller pieces.

Grinding of solid matter occurs under the expose of mechanical forces that trench the structures by overcoming of interior bonding forces .

Earlier history

It was discovered around 6000 BC that wheat seeds could be crushed between simple millstones to make flour.

In 1879, at the beginning of the Industrial Era, the first steam mill was erected in London.

Milling of flour is accomplished by grinding grain between stones or steel wheels.

Hand – crank milling machine

Raw material (eg.wheat)

Grinding

collector

Modern flour milling machine

belt

Working principle Raw material which is used in flour milling

has to undergo number of processes like:

1. To store a reserve of wheat.2. To remove all the impurities from the

wheat and prepare it for milling.3. To mill the wheat and separate flour from

the bran and skins of the wheat (MILLING)4. To store the milled products before dispatch

Milling "stone-ground ” usually means that the grain

has been ground in a mill in which a revolving stone wheel turns over a stationary stone wheel, vertically or horizontally with the grain in between.

Many small appliance mills are available, both hand-cranked and electric. The mill stones frequently rub against each other resulting in small stone particles chipping off and getting into flour, but they are removed before the flour is solid

• Modern flour mills are very highly automated and all parts of the process are easily adapted to computer control.

•Flour milling parts contains cotton sifter pads, nylon filter mesh, elevator bucket, acrylic tube, sieve cleaner, etc.

•In general, grinding processes require a relatively large amount of energy

• Raw material is fed at the top of the machine. It as to pass through 3 floors slowly A grinding mill is a unit operation designed to break a solid material into smaller pieces.

• There are many different types of grinding mills and many types of materials processed in them.

• Historically mills were powered by hand (mortar and pestle), working animal (horse mill), wind (windmill) or water (watermill).

• Today they are also powered by electricity.

2.Reduction passages with smooth rolls are employed reduce semolina (a byproduct ) into flour.

: The milling system contains:

1. Break passages for gentle breaking of the wheat kernel and production of flour

:Taking example of wheat

4.Flour milling machine grinding, cutting uniform, broken less, low temperature, final product is bright and clean, high wheat yield that is gradually widely used.

3. separation of fine flour particles from the conveying air.

Presented by,Madhwanand ,Vedavyas

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