Tianyuan Sand Roller

The service life of a sand roller depends on a range of factors, including the condition of the rice mill, the characteristics of the sand roller itself, the type and variety of brown rice, its moisture content, the milling process, and the operator’s skill level. The reference service life of a sand roller is expressed in terms of the amount of rice milled, as follows (for single‑machine white‑rice production with standard processing accuracy): Milling tonnage = K × S × 1500 Notes: 1. The coefficient K is a reference value, typically ranging from 1 to 2. 2. S represents the effective grinding surface area of the sand roller, in square meters.

After a period of use, both the rice‑milling output and precision of the sand rollers will decline—this is a normal occurrence. If output decreases, when conditions permit, you can remove the sand rollers and use a handheld grinding wheel to resurface the helical grooves; in most cases, production will then return to normal. For reduced precision, you can increase the pressure on the pressure bar or adjust the rice‑cutting blade to address the issue. Before replacing the sand rollers, carefully inspect other components in the whitening chamber—such as the helical conveyor and the rice‑diverting device—to ensure they are functioning properly; otherwise, even after replacing the rollers, the results may still be subpar. Sand rollers are fragile items; handle them with care during transport to avoid dropping, impact, or rolling. When storing, protect them from moisture, freezing, and excessive heat, and keep them away from acids, alkalis, or…

The performance and durability of sand rollers depend on a range of factors, including the condition of the rice mill, the characteristics of the sand rollers themselves, the type and variety of brown rice, its moisture content, the milling process, and the operator’s skill level. When milling does not meet expectations, consider selecting a more suitable sand roller according to the following guidelines (focusing solely on the sand roller in addressing the specific issue at hand): 1. If the sand roller’s service life is unsatisfactory: ⑴ Try using a sand roller with higher hardness. ⑵ Try using a sand roller with a finer grit size.

Rice milling is a processing operation in which rotating mill rollers induce collisions, friction, and tumbling between rice grains and the components of the milling chamber, as well as among the grains themselves. Through grinding and friction‑induced abrasion, the outer layers of the rice grains are removed—either partially or entirely—producing milled rice that meets specified quality standards. Depending on the material of the mill rollers, commonly used rice mills can be broadly classified into two structural types: sand‑roller mills and iron‑roller mills. Compared with iron‑roller mills, sand‑roller mills deliver gentler impacts, tumbling, and grinding actions, resulting in lower broken‑rice rates, reduced energy consumption, higher yields, and greater production efficiency. Consequently, sand‑roller mills are currently the most widely adopted equipment in rice‑processing enterprises.