Fulvic acid powder can be manufactured from humic-rich raw materials through a controlled industrial process involving extraction, solid-liquid separation, purification, concentration, drying, and final powder conditioning. The quality of the finished product depends heavily on the composition of the starting material and on how carefully each processing stage is controlled.
The process starts with raw material selection and preparation. Leonardite, lignite, peat, and other humic-rich materials may be evaluated according to their organic matter content, mineral composition, moisture level, ash content, and extractable fulvic fraction. The selected material is generally crushed and screened to obtain a more uniform particle size and improve contact with the extraction medium.
In the extraction stage, the prepared humic material is mixed with a suitable liquid extraction system under controlled pH, temperature, agitation, and contact time. The purpose of this step is to transfer soluble fulvic components into the liquid phase while minimizing unwanted insoluble matter. Extraction efficiency can vary considerably depending on the raw material and operating conditions.
The resulting slurry then undergoes solid-liquid separation. Coarse solids may first be removed by screening or settling, followed by filtration or centrifugation. This step is essential because residual mineral particles and suspended organic matter can affect final powder solubility, appearance, ash content, and processing performance.
The clarified extract may require additional purification and refinement. Depending on the desired product grade, purification can include fine filtration, controlled precipitation of unwanted fractions, demineralization, clarification, or other separation techniques. The objective is to obtain a cleaner fulvic-rich liquid with consistent chemical and physical properties.
After purification, the solution is transferred to the concentration stage. Water is removed under controlled conditions to increase solids content before drying. Vacuum evaporation is often useful because it can reduce thermal stress while improving process efficiency. Excessive temperature or prolonged heating should be avoided to preserve product quality.
The concentrated fulvic solution is then converted into powder through a suitable drying process. Spray drying is widely used in industrial production because it provides rapid moisture removal, continuous operation, and relatively uniform powder formation. Depending on the process design, other drying technologies may also be used.
After drying, t
