Bohui Paper’s New BM 3 Producing "Perfect Quality" Board at Mill in China

Bohui Paper, China, reports that following a rapid startup, its new Voith (Germany) supplied BM 3 is running highly satisfactory and producing board of "perfect quality." With a wire width of 8,750 mm and a total length of 400 meters, the BM 3 is one of the world’s most efficient board machines. It is designed for an annual production of 750,000 metric tons of quadruple-coated ivory board in the basis weight range of 290–340 gsm.

Voith supplied the entire paper machine from headbox to winder as well as automation and machine clothing. BM 3 features three Master Jet III-F headboxes and a three-layer wire section with a latest generation DuoFormer D. On the wire section’s intermediate ply, a DuoShake ensures optimum fiber orientation and higher strength values. The press section consists of a double felted Tandem NipcoFlex press for a maximum line load of 800 kN/m. A steam blower box is installed upstream of the second nip for moisture cross profile control. 

An offset press ensures the high surface quality necessary, while surface smoothness is achieved by an EcoCal Hardnip calender with nozzle-type moisturizer and a heated roll with FlexiTherm coil. The coater consists of four DynaCoat AT coating units that use JetFlow free-jet applicators for non-contacting application of the two preliminary coats, the rear and top coats. 

At the end of the production line, a Sirius roller with an EcoChange reel changing system rolls up the ivory board for downstream processing by two VariFlex winders.

The Shandong Bohui Paper Group was established in 1994. The paper and board manufacturer headquartered in Shandong Province employs 5,000 people and produces ivory board, graphic papers, testliners, kraftliners, and plasterboard.