In the fertilizer industry, raw materials used for different fertilizer types vary significantly. Organic fertilizers require the processing of straw and fermented livestock and poultry manure, while compound fertilizers often involve hard particles such as phosphate rock and potassium chloride. Chain crushers, with their versatile adaptability, can easily handle the crushing needs of these diverse raw materials.

For fibrous raw materials such as straw and rice husks, common in organic fertilizer production, the chain of a chain crusher uses high-speed impact to sever the fibers, eliminating the “fiber entanglement” problem common in traditional hammer mills. The resulting pulverized material is loose and easy to mix with other raw materials for fermentation. For cake-based raw materials (such as soybean meal and rapeseed meal), the chain’s shear force effectively breaks up lumps and produces uniform crushed particles, eliminating excess powder and reducing raw material waste.

Even for hard mineral raw materials used in compound fertilizer production, chain crushers with high-strength alloy chains can achieve crushing through continuous impact, and the equipment’s lining is made of wear-resistant material, extending its service life.

In addition, it has a higher tolerance for the moisture content of raw materials. Wet materials with a moisture content of about 20% can be directly crushed without additional drying, which greatly simplifies the organic fertilizer production process and reduces the company’s initial investment.

The impact of low temperatures in northern winter on organic fertilizer fermentation efficiency has necessitated low-temperature adaptation of organic fertilizer production lines. Key measures focus on maintaining fermentation temperature and raw material pretreatment.

In terms of bacterial strain selection, production lines must utilize low-temperature-tolerant composite inoculants to ensure viability at temperatures between 5-15°C (with a viable bacterial count retention rate exceeding 85%), shortening fermentation start-up time to within 24 hours.

In terms of workshop design, insulation and a photovoltaic-assisted heating system are required to maintain the fermentation room temperature above 10°C through solar heating. Some organic fertilizer production lines also utilize closed fermentation chambers, utilizing bioheat generated during the fermentation process to maintain a constant internal temperature (temperature fluctuations within ±3°C).

In raw material pretreatment, to address the difficulty of raw materials such as straw degrading at low temperatures, production lines incorporate a pre-crushing step (crushing the raw materials to 0.5-1 cm) and use hot water humidity control (controlled at 30-40°C) to raise the initial raw material temperature and ensure fermentation efficiency.

These adaptation measures have increased the capacity utilization rate of organic fertilizer production lines in northern winter from the original 50% to over 80%, and the organic matter content of finished fertilizers has stabilized at over 55%, effectively ensuring the supply of fertilizers for agricultural production in northern winter.

Many people occasionally encounter blockages when using new type organic fertilizer granulators (raw material gets stuck in the granulation chamber, preventing pellets from coming out). However, if you take three steps in advance, this problem is virtually eliminated.

First, avoid any hard lumps in the raw material. Whether it’s manure or straw, lumps may form after fermentation. Before feeding, be sure to use a crusher to break up any lumps. Keep lumps no larger than 1 cm, otherwise they will get stuck in the die holes of the new organic fertilizer granulator. Accumulating these lumps will cause a blockage.

Second, control the moisture content of the raw material. Although new type organic fertilizer granulators are moisture-resistant, raw material that is too moist (over 65%) will stick to the granulation chamber, while too dry (less than 45%) will produce fine powder and clog the screen. Before each feeding, grab a handful of raw material and form a ball that breaks apart easily. This will ensure the raw material flows smoothly through the granulation chamber without blockage.

Third, perform a component inspection every day before starting the machine. Check the pressure roller of the new type organic fertilizer granulator to see if it’s stuck and the scraper at the discharge port to see if it’s blunt. If the roller can’t turn or the scraper is blunt, the pellets won’t come out and the machine will jam. Simply turn the roller manually and check the scraper to see if it’s sharp. If there’s any problem, adjust it immediately to avoid jams.

Many small organic fertilizer plants worry about “small space and compost turning machine maneuvers.” In fact, as long as you master placement and routing techniques, a windrow compost turning machine can operate smoothly even in a space as small as 100 square meters.

First, the pile must be placed smoothly. Avoid stacking the pile in small, scattered, round piles. Instead, create long, narrow piles—for example, a 1-meter-wide, 1.2-meter-high, and 5-meter-long strip. This allows the compost turner to move along the strip in a straight line, eliminating the need for frequent turns. This saves space and ensures thorough turning. Leave a 1.5-meter-wide aisle between two long piles—just enough for the compost turner to move back and forth without hitting the adjacent piles.

Second, turning techniques are crucial. If the space is truly limited and the windrow compost turning machine needs to turn, don’t do it directly on the pile; instead, move it into the aisle. First, raise the compost turner’s blades and move it to the center of the aisle. Then, slowly turn (keeping the turning radius at least 2 meters) to avoid the tracks pressing into the pile and causing the material to clump.

Also, you can turn the compost in layers. If the pile is high (over 1.5 meters) and the site is not wide enough, the windrow compost turning machine can turn the material on the top layer first, loosening it, and then lower the blades to turn the lower layers. This allows for thorough turning without breaking up the pile.

In BB fertilizer production, BB fertilizer mixers account for 20%-30% of total energy consumption. Through equipment adjustment and operational optimization, energy consumption can be reduced by 15%-20% without compromising mixing quality.

For BB fertilizer mixer upgrades, variable-speed motors are preferred over traditional fixed-speed motors. The speed is adjusted according to the mixing stage: in the initial feeding phase (when the raw materials have not yet filled the barrel), a low speed of 15 rpm is used to avoid idling energy waste; in the middle mixing phase (when the raw materials are fully tumbling), the speed is increased to 22-25 rpm for efficient mixing; and in the later stages (when the mixing is nearly uniform), the speed is reduced to 18 rpm to reduce energy consumption from excessive mixing. Furthermore, adjusting the mixer’s blade angle from 45° to 30° (for granular raw materials) reduces blade resistance, reduces motor load by 10%-12%, and reduces energy consumption accordingly.

There are three key aspects to optimizing operational details: First, “full load but not overload”—feeding the equipment at 75% of its rated capacity to avoid wasted idling caused by underfeeding (<60%) or motor overload and energy consumption caused by overfeeding (>90%). Second, “centralized batch production”—concentrating fertilizer production of the same formula within 2-3 hours to reduce energy consumption from frequent equipment starts and stops. Third, “reasonable cleaning cycles”—changing “clean every batch” to “clean every three batches”—reduces the equipment’s idle time during cleaning. Furthermore, an anti-stick coating on the drum wall ensures that residue remains within standards.

In addition, regularly inspect the wear of the BB fertilizer mixer’s blades. If the blade edge is worn by more than 1/4, repair or replace it promptly to avoid extended mixing time due to insufficient blade power.