MILLS SERIES BICARMILL

The new mills of series BICARMILL represent the answer to the demands of the customers:

• Low energy consumptions
• Low sonorous emission
• Minimal maintenance cargo
• Elevated reliability and quality of the system

For such scope, many innovative solutions in the operation system, in the system of opening and the maintenance have become necessary.
The result is the mill of series BICARMILL, an excellent and reliable product, in which you can "nd all the STM quality and experience.

BICARMILL: 8 fundamental advantages

1 JCF mill with horizontal geometry

Since 1980 STM develops and proposes advanced technologies in the field of the fine and ultrafine grinding and in particular, from nearly twenty years, in the field of the sodium bicarbonate milling for the cleaning of the flue gases.

Thanks to this long experience, STM has planned an innovative machine that, thanks to perfect integration of the mechanical and electronic technology, guarantees great performance of reliability, productivity and energetic saving.

The confirmation of the optimal energetic exploitation allowed from the new horizontal disposition of the grinding wheel bound together to a classifier with high efficiency, can be found in the minimal increase of temperature inside the grinding chamber, index that nearly all the employed power is used for the grinding and not dissipated as thermal energy.

Considering that, during the operating life of a mill, the energetic costs exceed by far the investment expenses, the efficient employment of the energy is currently, and it will be more and more in the future, a factor of fundamental importance from the economic and environmental point of view.

Moreover, it is important to remember that the JCF mill permits to micronize sodium bicarbonate to a finenesses till now never caught up industrially (D90 < 20µ D50 < 5µ) opening new and interesting opportunities of employment for this product. JCF mill with horizontal geometry

2 Total control of the air flow

On the BICARMILL, considering the longest experience of STM in the field of the application of sodium bicarbonate for the cleaning of the flue gases, has been installed instruments to guarantee the reading and the regulation on all the values of capacity and pressure of the air in the crucial points of the system.

Starting from the regulation in continuous of the air capacity, obtained modulating through inverter the speed of the fan, in order to guarantee the perfect correspondence to the wished final size and in order to obtain a correct dilution of sodium bicarbonate also in the case of sensitive variations of the air capacity of the main fan of the incinerator.

The pressuremeters installed in the grinding chamber and on the exit pipe of the fan, evidence the forming of incrustations or obstructions and signal, on the control panel, the necessity to program an intervention of cleaning.

3 Vibration control of the mill and fan

Always to remain connected to a concept of maximum reliability and duration of the system, we have equipped the BICARMILL with innovated vibration sensors that monitor in continuous the correct operation of the grinding and the fan group. Anomalous vibrations that can be generated from sodium bicarbonate incrustations or from the wearing of the bearings, are suddenly found and marked Using these information correctly, the operations of cleaning and maintenance are reduced to the necessary and can be programmed in advance.

4 Temperature control of the grinding chamber

The sodium bicarbonate is a chemical product that, if milled with temperatures higher than 45-50°C, loses a water molecule and becomes very more incrusting / sticky causing obstructions in the mill and an increase of the vibrations. On the BICARMILL, in order to limit this serious problem, it has been installed a probe that measures the temperature inside the grinding chamber and has been previewed two fixable thresholds of intervention, one fixed at 35°C that normally actives a signal of alarm, and the second one at 45°C that executes the stop of the mill.

Based on the ambient temperature and to the characteristics of the milled product ("neness, humidity...) it is possible to fix the two thresholds of temperature to the values which are more adapted for every single installation.

5 From a complex system to a machine ready to use

The BICARMILL takes an important revolution in the market of mills for sodium bicarbonate; it’s no longer than a system that must be assembled and be installed at customer care, with economic and organizational aspects, but a complete system with all the mechanical and control parts, tested and ready for the operation. The customer has only to make the power connection, the feeding of the sodium bicarbonate and the connections to the injection point.

6 Automatic controlled greasing

As well known, the greater cause of breaking of the bearings is given from the lack or wrong lubrication. Managing correctly this problem on machinery like mills, is of fundamental importance not only for the remarkable speeds of the rotating element, but also because they are normally used with continuous cycle.

On the BICARMILL, in order to guarantee a right lubrication, STM has installed the advanced programmable central greasing station in order to distribute to every point of greasing, frequently and in small doses, the correct quantity of grease. Moreover it is interfaced with the PLC in order to signal eventual obstructions of the lubrication pipes or the necessity to recharge the grease in the tank. The increase of reliability achieved with this approach, takes to important economic savings on the extraordinary maintenance and a remarkable reduction of the unprogrammed stops of the machine.

7 Automatic cleaning system

To avoid forming of incrustations on the wheels of the mill, of the fan and on the piping system, the BICARMILL is equipped of a peristaltic pump for the dosing of non-sticky additives. The control system regulates the quantity considering the sodium bicarbonate capacity during the grinding in order to maintain it constant to the desired value (normally the 1,5‰).

One of the most used anti-sticky additive in this application is DARAGRIND 136 that, formulated with non-toxic glycols, combines the extreme e#ciency also with low dosages with the full compatibility with sodium bicarbonate.

8 Easy to install and to maintain

The BICARMILL is created for being installed in the fixed point and to be put on level with a simple regulation on the silentblock of support. It is not necessary to fix it on the ground because the control system of the vibrations always guarantees a functioning under perfect stability.

In order to improve the work atmosphere and to respect the more and more restrictive norms on the acoustic level, the BICARMILL is placed inside of a soundproof cabin with inner lighting system and easily disassembling panels so that the operator can access to the BICARMILL with facility and in complete security.

Models

Model	Total installed power	Total absorbed power	Air capacity m3/h	Pressure mmH2O	Fineness	Capacity per hour	Consumption per hour kW/Ton	Noisiness
300	18,4 kW	14,8 kW	800	500	d90<30µ d50<15µ	10 - 250 Kg	60	<75dBA
					d90<20µ d50<5µ	10 - 150 Kg	100
400	29,2 kW	23,5 kW	1500	800	d90<30µ d50<15µ	40 - 450 Kg	55	<75dBA
					d90<20µ d50<5µ	40 - 300 Kg	85
630	64,2 kW	51,5 kW	2700	800	d90<30µ d50<15µ	100 - 1000 Kg	52	<75dBA
					d90<20µ d50<5µ	100 - 600 Kg	85

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