hammer mill presentation (1015 kb) - masterpiece · compared with the dan-webs new developed hammer...

Dan-Web Sustainability

Over the years, an increased demand for low environmental emissions and cost

savings in general, has made DAN-WEB enlarge their development work to meet

these criteria and to help companies around the world fulfill their energy politics.

Today we believe, that the Hammer Mill offered, is the most efficient, low energy

consuming, and lowest operational cost Mill on the market!

Our main target: ▪ Energy savings

▪ Throughput

▪ Low operational cost

▪ Degree of defibration


Complete Hammer Mill HM-DW

Main benefits:

▪ Lower energy consumption

▪ Higher throughput

▪ Low maintenance cost

▪ Rapid on site change of hammers

and breaker bars


Dan-Web Hammer Mill Sizes

HM-DW635

HM-DW254

HM-DW508

HM-DW1016

HM-DW102

HM-DW140

HM-DW50 50 mm

102 mm

140 mm

254 mm

508 mm

635 mm

1016 mm

(H-01)

(H-12)

(H-14)

(H-20)

(H-40)

(H-60)

(H-100)


Main benefits:

▪ Less heat and static generated

▪ Long lifetime on bearings

▪ Low maintenance

▪ No air/oil cooling needed

▪ Handles all types of commercial pulp

▪ Generates less dust and fines

▪ No vibrations

▪ No special foundation needed

New DW Rotor

Low Energy & Low RPM Rotor


New DW Rotor

All surfaces machined to high tolerances

- No balancing issues

Simple replacement of hammers

- No distance pieces between hammers

- No misplacements of hammers

- Fast change of hammers in the mill

Cutting edge

- Regrindable

No open areas

- No pulp build up

- No vibrations

Higher strength

- No safety issues

All surfaces rust protected

Limited travel distance on hammers

- No metal contamination

- No broken cutting edge

Lower energy consumption - Higher throughput

Better defibration - Easy maintenance

Hammer width overlap


Estimated Lifetime

Hammers, Breaker Bar, Screen

To maintain a 85-100% efficient performance and to keep

energy consumption to a minimum, we recommend:

▪ Regrind Hammers after 10.000 kg untreated pulp per hammer

▪ Turn Breaker Bar at each hammer regrind

▪ Regrind Breaker Bar after it has been turned 4 times

▪ Regrind Hammers after 20.000 kg treated pulp per hammer

▪ Replace Screen at every second hammer regrind


Example: One 508 mm Mill

Hammers:

168 Hammers x 20.000 kg treated pulp = 3.360 MT before regrinding

Screen:

To be changed after: 2 x 3360 MT = 6720 MT treated pulp

Hammers can be regrinded approximately 3 times:

Total hammer lifetime is: 3 x 3360 MT = 10.080 MT

Breaker Bar:

4 sides x 3360 MT treated pulp = 13.440 MT before regrinding

Estimated Lifetime

Hammers, Breaker Bar, Screen

Breaker Bar can be regrinded 1 time:

Total breaker bar lifetime is: 2 x 10.080 MT = 20.160 MT


Energy Savings


The numbers below are based on actual current numbers from KAMAS

compared with the Dan-Webs new developed Hammer Mill (DW508).

KAMAS Dan-Web Total energy savings Total energy savings

Amps Amps 4 mills per year

Idle 60 48 32 kw/h 280.000 kw

300 kg treated pulp , Ø6 mm screen 70 (55) 37 kw/h 319.000 kw

310 kg treated pulp , Ø4 mm screen (110) 58 129 kw/h 1.114.000 kw

Figures in parentheses is estimatet.

Benefits with Ø4 mm screen:

Energy savings for each Mill, Better defibration, Higher forming throughput, Less heat generation.

Higher capacity on the Mills (500 kg/h) and with this new Mill un-treated pulp can be processed

without nits which will allow raw material cost savings

Better absorbents and easier water cleaning at the entangler – if any.

Time Consumption

Recommended Service

Hammer change: 30-60 minutes254 mm = 30 min 508 mm = 40 min 635 mm = 45 min 1016 mm = 60 min

1. Unscrew hammer mill hood 2. Lift top cover until it stops 3. Rotate mill until a locking

ring is up

4. Rotate lock shaft until open

end of cotter pin is up

5. Unlock cotter pin 6. Pull out: cotter pin hammer

shaft hammer(s)


Time Consumption

Recommended Service

Breaker Bar change: 15 minutes

1. Unscrew hammer mill hood 2. Lift top cover until it stops 3. Loosen bolts on breaker bar unit

4. Remove breaker bar top 6. Change or turn the breaker bar5. Loosen bolts on breaker bar unit


Time Consumption

Recommended Service

Screen change: 2 minutes

1. Unscrew hammer mill hood 2. Lift top cover until it stops 3. Lift up and rotate screen out

4. Rotate new screen down 5. Align guide pins with holes 6. Align guide pins with holes


hammer mill presentation (1015 kb) - masterpiece · compared with the dan-webs new developed hammer...

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