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Feed grade ferrous sulfate

View: 19 Author: Site Editor Publish Time: 2023-03-02 Origin: site

Feed grade ferrous sulfate

Feed grade ferrous sulfate:

Brief introduction of feed grade ferrous sulfate:

Ferrous sulfate is a mineral feed additive widely used in the feed industry. Iron is an important component of hemoglobin, myoglobin, cytochrome and various oxidases. Ferrous sulfate can supplement the iron needed for the growth of poultry and livestock, promote the growth and development of poultry and aquatic animals, enhance disease resistance, improve feed effect. Iron also has a detoxification effect on the toxin-gossypol contained in the cottonseed cake in the feed.

Types of Feed Grade Ferrous Sulfate:

Feed grade ferrous sulfate is divided into ferrous sulfate monohydrate and ferrous sulfate heptahydrate. Ferrous sulfate monohydrate is off-white powder, and ferrous sulfate heptahydrate is blue-green crystal. Ferrous sulfate heptahydrate is ferrous sulfate (FeSO4 7H2O with seven crystal waters , while ferrous sulfate monohydrate is ferrous sulfate heptahydrate that becomes a crystal water after being dried and purified. Iron (FeSO4 H2O Compared with ferrous heptahydrate, ferrous sulfate monohydrate has higher purity and content, longer shelf life (up to 6-9 months without caking), and is more widely used. And because ferrous sulfate heptahydrate has a lot of inconvenience in the process of processing, production and storage, most feed manufacturers use ferrous sulfate monohydrate at present.

Disadvantages of ferrous sulfate heptahydrate as feed raw material:

1. The moisture content of ferrous sulfate heptahydrate is too high, it is easy to stick to the sieve plate or the crushing chamber during the crushing process, block the sieve holes, reduce the effective sieving area of the sieve plate, and reduce the output;

2. Ferrous sulfate heptahydrate will affect the stability of vitamins in the feed, for example, it will promote the oxidation failure of vitamin ;

3. After a certain period of storage, it is prone to agglomeration, which is not conducive to subsequent processing;

4. When preparing the premix, the oxidation reaction is invalid because the ferrous salt containing multiple crystal waters is very easy to react with its carrier stone powder or calcium carbonate.

The most effective way is to remove the free water and crystal water in ferrous sulfate heptahydrate in time, so that it can be transformed into ferrous sulfate monohydrate with good storage performance and high iron content. Compared with ferrous sulfate heptahydrate, ferrous sulfate monohydrate The purity and content are higher, and the shelf life is longer (up to 6-9 months without caking). At present, almost all feed-grade ferrous sulfate is ferrous sulfate monohydrate.

The main functions of ferrous sulfate as feed are as follows: 

1. Supplement the nutritional needs of livestock and poultry for ferrous iron, prevent iron deficiency anemia and its complications; 

2. Enhance the immune function of the body, improve the quality of the carcass, make the skin ruddy and the flesh bright red;

3. Promote growth and increase feed remuneration. 

To sum up: It will be a development trend to replace ferrous sulfate heptahydrate with ferrous sulfate monohydrate as feed raw material. The determination standard of feed grade ferrous sulfate content "HG/ T 2935-2006 " stipulates that feed grade  ferrous sulfate  Should meet the following form requirements:



Ferrous Sulfate Monohydrate

Ferrous Sulfate Heptahydrate

Mass fraction of ferrous sulfate ( calculated as FeSO4 7H2O )



Mass fraction of ferrous sulfate ( calculated as FeSO4 H2O )



Iron ( Fe ) mass fraction



Arsenic ( As ) mass fraction



Lead ( Pb ) mass fraction



Fineness ( through rate of 180um test sieve)