There are many differences in investment costs between disc granulators and rotary drum granulators. Generally speaking, the investment cost of disc granulators is relatively low, while rotary drum granulators are more suitable for large-scale production. The equipment investment cost per unit output is lower in large-scale production. The details are as follows:

In terms of equipment purchase cost, under the same processing scale, the disc granulator is generally lower than the rotary drum granulator. This is because the disc granulator has a relatively simple structure and the manufacturing process of the core components is not complicated; the rotary drum granulator has a higher manufacturing cost due to its large cylinder and high requirements for the transmission system.
In terms of installation and commissioning costs, the disc granulator has a compact structure, small footprint, simple installation process, no need for complex foundation treatment, low commissioning difficulty, and low cost. The rotary drum granulator is large in size and complex in structure. It requires a professional team for installation, and has high requirements for the installation site, so the installation and commissioning costs are high.
In terms of operating energy consumption costs, the disc granulator has a small power and low energy consumption per unit time. The rotary drum granulator has high power and high energy consumption because it drives a large cylinder. However, in large-scale production, the energy consumption cost per unit output will be diluted due to the production capacity advantage.
In terms of maintenance cost, the consumable parts of the disc granulator are small parts such as scrapers and linings, which are easy to replace and have low material costs. The consumable parts of the rotary drum granulator, such as the support wheel and the retaining wheel, are large in size and have high material requirements. Professional tools are required for replacement, and the maintenance cost is higher.
In terms of supporting equipment cost, the disc granulator is suitable for small and medium-sized fertilizer production lines, and the supporting equipment is relatively simple. Generally, it only needs to be connected with simple feeding and screening equipment, and the investment is small. The rotary drum granulator is mostly used for large-scale production and needs to be used in conjunction with a relatively complete feeding system, drying system, screening system, etc. The overall supporting equipment investment cost is relatively high.