MOP Mill Oxide vs Barton Oxide

MOP mill oxide and Barton lead oxide have different characteristics.

Lead oxide and the plate, which is made up of a mix of grid and oxide slurry and additives, are the heart of a lead acid battery.

If you get these two components right, 90% of your lead battery will be successful, otherwise not.

This article is not aimed at ultra-technical scientists but at managers, top managers who find themselves choosing which investment to make for their company, only that their employees don’t explain in detail ‘how’ high quality lead batteries are produced .

If you are among these, I suggest you to spend 2 minutes of your life because they can make a difference.

BARTON PROCESS (Thermal Oxide)

In the Barton process, molten lead is poured from a smelting pot into a reaction container.

A rotating blade agitates the lead to maximize exposure to air.

The molten lead is stirred and reacts with oxygen in the air and forms lead oxide.

This action creates particles with an essentially spherical shape(with a lower surface than the abrasive oxide),

and due to this shape

it has lower reactivity and absorption values than the abrasive oxide.

It’s an oxide obtained from molten lead and consequently at high temperatures the method Barton favor the formation of ß (Beta) PbO.

There is a certain level of control over alpha and beta PbO production, a higher reaction temperature increases the amount of ß PbO, reducing the temperature increases the amount of ɑ (alpha) to ß PbO.

We can say that Barton oxide is less reactive than abrasive oxide.

For this reason it can also be mixed immediately without storage.

MOP MILL PROCESS (abrasive oxide)

Lead pieces (cylindrical) are produced.

The Lead cylinders can be produced by melting or by a lead shaver.

The cylinders are stored in a silo to cool and crystallize better (if they are melted products, otherwise not) for at least 12 hours.

They go into a rotating cylinder (Mill), by a transfer system, with an air flow, as they rotate in the mill, the surfaces oxidize.

All this gives rise to an exothermic process which provides the heat necessary to fuel the oxidation reaction.

The oxide layer, which is more brittle than the lead substrate, flakes off from the cylinder through air and abrasion by means of a connecting tube between the mill and the filter,

the oxide is transported towards the filter which separates the oxide from the air.

The process takes place in a temperature range of 120 – 145 °C. with a constant air flow.

The oxide appears long and flat rather than spherical like Barton oxide with a finer grain size and greater surface area.

For the lowest process temperature system of the Barton method, the oxide produced with the abrasive system is entirely alpha PbO.

If you want to read a specification of a CAM MOP mill CLICK HERE

Comparison between ball mill and Barton oxide


As can be seen in the chemical/physical characteristics of Barton and MOP mill oxide, it is clear that it is NOT advisable to use absolute thermal oxidefor the manufacture of positive plates, as it’s not very reactive and doesn’t guarantee good curing during the cycle.

This is determined by the fact that there is no reaction between the stable oxide and the interstices of the crystals, consequently during curing, there will not be a ‘binding’ effect on the support and electrical conduction alloys.

All this creates a layer of air between the grid and the mass, negatively influencing the formation, thus requiring greater energy consumption for the formation of the plates themselves.

The use of thermal or abrasive oxide depends on the type of batteries you want to produce, however it is preferable to use the abrasive one for the reasons mentioned above.

If you want a lead oxide production line that only produces oxide with tetragonal structure, i.e. the MOP mill by CAM,

the lead oxide specialists, click on the link below: