Iron Ore Pellet Bentonite Purification Production Process Equipment|Bentonite Grinding Mill For Sale

Bentonite as the binder of pellet, has a traditional history. In China, Hangzhou Iron and steel first used bentonite instead of hydrated lime as pellet binder in 1978, which achieved good results, and then it was popularized and applied in manufacturers all over the country. Up to now, iron ore pellet bentonite has been the third largest user of bentonite. As a traditional pellet binder, bentonite has the characteristics of easy availability of raw materials, low price and convenient addition. At present, there are still many enterprises studying pelletizing organic binder in China, but the application has not yet, and they are still in the stage of laboratory test or pilot test. Therefore, bentonite is still the main material for the production of pellet binder. Iron ore pellet bentonite can only be used as iron ore pellet bentonite after purification and production process. Let's take a specific look at the purification and production process of iron ore pellet bentonite.

HCQ Bentonite Raymond mill made by - HCM

As a bentonite for metallurgical pellets, the purity is generally not high, and the content of effective mineral montmorillonite is more than 60%. The purification method is generally dry purification. The first time is manual selection in the process of mining and drying, which can remove large impurities. Manual selection is mainly used for bentonite with high montmorillonite content in raw ore. Manual selection is generally carried out in the mining yard, and the waste rocks in the ore are selected manually. It can also be mined in sections and layers according to the technical index requirements of the application field, stacked separately and processed separately. At present, manual selection is widely used in China; The second is to use bentonite Raymond mill to process some fine sand into powder in the grinding process.

The specific processing flow is as follows:

Raw ore→Drying → milling → air separation and grading → packaging

Drying is generally carried out in two stages. First, put the ore on the stockyard for natural drying to reduce the moisture of the raw ore from 40% to less than 25%. Then conduct coarse crushing, and the particle size of crushed products is 30 ~ 40mm. The crushed products are further dried, generally using air drying and fluidized drying. Its drying equipment mainly includes fluidization dryer, rotary shutter dryer, cyclone dryer, rotary dryer, etc The drying temperature is below 250 ℃, and the moisture content of the product is controlled to be less than 6% ~ 12%. Too high drying temperature or too long drying time will affect the product quality and even lose the gummy. Raymond mill is generally used for grinding, and the product fineness is determined according to the user's requirements, generally 100 ~ 325 mesh The final product is obtained after the grinded product is graded and desanded by cyclone classifier. The particle size of the finished product can be controlled by adjusting the speed of the analyzer of Raymond machine. Theoretically, the finer the particle size of bentonite, the more conducive to pellet production. However, the power consumption of fine grinding process will be large, and the output will be reduced and the cost will rise. Therefore, the particle size of soil for pelletizing is generally required to be 200 mesh (0.074mm), and the passing rate is more than 97%.

As bentonite for metallurgical pellets, calcium bentonite is generally the main bentonite. Most of the bentonite produced in nature is calcium bentonite. The performance of calcium bentonite is worse than that of sodium bentonite, so manufacturers often use artificial sodium method to modify calcium bentonite into sodium bentonite.

Bentonite Raymond mill- Made by HCM

There are two methods: wet method and dry method

Dry method: after the bentonite is crushed to a certain particle size, a certain amount of na2c03 is added, fully mixed and extruded, and then dried and ground; Na2c03 can also be placed for a certain time after being fully mixed with bentonite to make it fully react, and then dried and ground.

Wet method:The process is to prepare 10% bentonite slurry with water to fully hydrate the bentonite, then add surfactant in a certain proportion, react at a certain temperature for 3h, dry at 103-c, and then crush it. Without drying and crushing, this method can be directly used to prepare drilling fluid on site.

From the above sharing the iron ore pellet bentonite purification production process equipment, we know that Bentonite Raymond mill is generally used for processing whether purification or modification process. With the continuous development of industrial technology, the Bentonite vertical roller mill with higher efficiency and lower energy consumption has been used to process iron ore pellet bentonite. The vertical roller mill is suitable for large-scale projects. Although the later maintenance cost is lower than Raymond mill, the early investment is larger than Raymond mill, which is also a pressure on small and medium-sized enterprises. Even if the vertical roller mill has advantages in all aspects of performance, the enterprises using Raymond mill still account for the majority. HCMilling (Guilin Hongcheng) is a manufacturer of iron ore pellet bentonite Raymond mill and iron ore pellet bentonite vertical roller mill, with complete models and configurations.

If you are interested in bentonite grinding mill equipment, please contact mkt@hcmilling.com or call at +86-773-3568321, HCM will tailor for you the most suitable grinding mill program based on your needs, more details please check www.hcmilling.com.