6. TECHNICAL SESSION
May 28, 2001
Chairman: Rae Cunnington
6.1 Pressurized Eop at Western Pulp Limited Partnership, Squamish.
Rae Cunnington presented on behalf of Jim Oei.
A copy of the presentation is included under 8. Attachments at the end of these minutes.
Q&A:
How much peroxide is used? Rae will find out.
Is caustic used to bring up pH prior to the pulp machine? D1 end pH is 3.7, i.e. a classic end pH so many do add caustic.
What is the final brightness? 89.
How is peroxide added? Split addition around the reactor, before and after. Added at pump after blow tube.
6.2.1 Double Oxygen Stage as Second Bleaching Stage and New MC Do Stage at Crofton
Dave Flater of Crofton presented.
A copy of the presentation is included under 8. Attachments at the end of these minutes.
Q & A
Is oxygen split between the 2 stages? No, all the oxygen goes into the first stage and mixing only in the second stage. More work is done by adding caustic to the second stage.
Was the mill able to confirm yield increase? No, there appears to be around 1% increase in yield – certainly there is no yield loss. Norm Liebergott added that purpose was to reduce bleaching costs.
6.3 Split Peroxide Addition in Eop at Celgar Pulp
Rae Cunnington presented on behalf of Ralph Lunn.
A copy of the presentation is included under 8. Attachments at the end of these minutes.
page 2
Q & A
There were questions re: specific peroxide charge; pH; chemical applications. Rae has asked Ralph to supply this information.
Is colour an issue in BC mills? No it is mill specific.
Why is viscosity higher with 70/30 split? Suggestion was that Celgar should add magnesium sulfate at bottom of tower then the 100/0% option would be best all round.
6.4 Conductivity Control versus pH Control of the Eop Stage at Powell River
Rae Cunnington presented on behalf of Pacifica.
A copy of the presentation is included under 8. Attachments at the end of these minutes.
Q & A
Who else has conductivity on Eop? No one.
What did mill hope to achieve? Lower caustic use. How much? 4 or 5 kg/tonne less caustic.
Any idea re: mtce. costs? No.
6.5 Latest in Second Bleaching Stages
Presentation by Norm Liebergott.
There was no electronic file available for this presentation.
6.6 Developments with Peracetic Acid and Catalyzed Peroxide
Presentation Ross Anderson.
A copy of the presentation is included under 8. Attachments at the end of these minutes.
6.7 Ozone in the Last Bleach Stages: Bench marking Ozone Lab Systems
Presentation by Gord Homer.
A copy of the presentation is included under 8. Attachments at the end of these minutes.
page 3
Q & A
Were sample pH's adjusted? No, took mill pulp as at came. 3.5 pH. Added ozone.
Power cost? Depends upon whether generate power onsite or not. Chlorate costs/power also going up.
6.8 Marathon Mill Safety Presentation – "REACH" (Reduce Employee Accidents by Changing Habits)
Presentation by Glen Labrash.
Initiating behaviour-based program at Marathon.
What is it? Parallel process to trad. safety. Allows to better track performance. Behaviour Science Technology's BAP process. Address safety concerns without having to worry about accountability, discipline. Just conc. on whether something is safe w/o the other concerns. Used together with traditional methods.
How does it work? Employees do the observations. Observe fellow employees. Data sampling procedure. Go into database. Tracks whether getting better or not and pinpoint specific problems, root cause and workable solution. Benefits: Two employees thinking about safety due to observation method. Audits designed to include feedback – reinforcement and solutions. Ownership due to feedback.
Why should I care?. Answered.
Summary: Sense of control and improves safety.
Chose 4 years ago. Challenge was the changing of company ownership. One observation per employee per month. Close to getting there.
People behave differently when they know they are being watched. Taken into account by program design. Often behaviours are impacted by conditions beyond control, e.g. external conditions. If they do behave differently that good behaviour may be re-inforced anyway.
page 4
Q & A
Do employees know they are being observed? Yes.
Random, i.e. vary observation time during shift, e.g. day or night? Do spread it out about equally.
Office workers included. Yes. Effective? Yes, found some at risk behaviours that were accepted but known by health & safety workers. Concerns like quality of life, e.g. back, eyes, carpal tunnel. Observable behaviours. Actually more accepted by office workers than trades.
What % have been trained as Observers? 25% Bit more office than union people. Hard time freeing up union people for training.
Mill's intention for number observations, 300 per month observation. Object is to train everyone.
Seen impact to safety results? Think so. Are safest mill currently but other reasons in addition to this program.
Peer on peer? Mostly because more accepted but try to get outside observer to area/job.
Technical, PAPTAC, Bleach Committee Meeting Minutes, May 27-30, 2001.doc