This document outlines the process for manufacturing feed grade zinc sulfate monohydrate. It involves reacting zinc oxide with sulfuric acid, filtering and purifying the solution through multiple steps like adding peroxide to remove iron and zinc powder to remove cadmium. The solution is then concentrated through multi-effect evaporation and centrifugal processes before being dried and packaged. The manufacturer, Rech Chemical Co. Ltd, carefully monitors the raw materials and each production step, using advanced equipment for evaporation, concentration, drying and testing the final product's heavy metal and zinc content.

1. Flow Chart Of Feed Grade Zinc Sulfate Monohydrate Manufacturing
Description of zinc sulfate monohydrate
Molecular Formula: ZnSO4.H2O
Grade: feed grade
Content: 98%min
Zinc: 35%min
As the above picture, the important process of production zinc sulfate
monohydrate is as follows.
Washing the material
↓
Zinc oxide+ Sulfuric Acid
↓
Reaction

2. ↓
Filter
↓
Add Peroxide, remove Fe
↓
Add Zinc Oxide, control PH
↓
Filter
↓
Add Zinc powder, remove Cd
↓
Filter
↓
Multi-effect evaporation
↓
Concentration
↓
Centrifugal
↓
Dry
↓
Package
Rech Chemical Co. Ltd keeps eye on every link of zinc sulfate production:
examine the raw materials and washing before producing, when producing,
Rech Chemical Co. Ltd adopt Multi-effect evaporation & concentration and
finished-product hot-air drying machine in the production, and use
Polarographic Analyzer and Automatic Absorption Spectrophotometer in the
inspection section to test heavy metals content and zinc content in zinc sulfate.