Problems with the rod mill inlet
The output of the rod mill is greatly affected by the feed rate. According to a large amount of reference data, the main reason for affecting the feed rate and ventilation of the rod mill is the feed port of the rod mill. Now take the old-fashioned series of rod mills as an example of analysis, the original design of the mill manufacturer is designed to be a pattern.
In the original design, the feed port is usually installed horizontally, and the material forms a natural accumulation of 45° on the bottom surface of the material port, so that the effective ventilation area of ​​the feed port is about 0.065 m 2 , which is equivalent to the designed ventilation cross-sectional area. 1/3. When it uses the bucket scale batching and the closed loop load is high, the ventilation area of ​​the feed inlet is blocked by the material to substantially no, and the material flows only by pressure in the mill. Due to the large moisture content of the raw material mill, the water vapor and fine powder evaporated from the material cannot be discharged in time during the grinding and heating process, and the swirling airflow is formed in the front part of the rod mill, which increases the over-grinding phenomenon in the mill. And the buffering effect is brought about, so that the impact force of the steel ball is weakened, and the fine powder of the corner portion of the front cylinder body is gradually bonded, forming a serious grinding phenomenon of the rod mill. Especially in winter, this phenomenon is widespread. Because the cement mill has higher requirements on the fineness of the product, the material needs to stay in the mill for a long time. Due to the poor ventilation of the rod mill, the heat generated during the grinding cannot be discharged in time, and the temperature inside the mill is increased. The temperature increases to make the surface of the fine particles of the cement micropowder charged, and under the action of static electricity, the particles and the particles are coalesced between the particles and the abrasive body, causing the electrostatic adsorption of the fine powder on the surface of the abrasive body, to a large extent. The impact grinding function of the grinding body is weakened, the grinding efficiency of the rod mill is lowered, and the energy consumption is increased.
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