IT1260282B - Appts. for descaling blooms, thin slabs and billets - comprises telescopic arms with nozzle that spray descaling water as they stroke parallel to slab and shut-off the water on return stroke to conserve water. - Google Patents

Appts. for descaling blooms, thin slabs and billets - comprises telescopic arms with nozzle that spray descaling water as they stroke parallel to slab and shut-off the water on return stroke to conserve water.

Info

Publication number
IT1260282B
IT1260282B ITUD920172A IT1260282B IT 1260282 B IT1260282 B IT 1260282B IT UD920172 A ITUD920172 A IT UD920172A IT 1260282 B IT1260282 B IT 1260282B
Authority
IT
Italy
Prior art keywords
water
descaling
slab
spray
arms
Prior art date
Application number
Other languages
Italian (it)
Inventor
Giovanni Coassin
Original Assignee
Danieli Off Mecc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Danieli Off Mecc filed Critical Danieli Off Mecc
Publication of ITUD920172A0 publication Critical patent/ITUD920172A0/en
Priority to IT000172 priority Critical patent/IT1260282B/en
Priority to AT93110927T priority patent/ATE158729T1/en
Priority to EP93110927A priority patent/EP0586823B1/en
Priority to ES93110927T priority patent/ES2108170T3/en
Priority to DE69314275T priority patent/DE69314275T2/en
Priority to KR1019930013525A priority patent/KR940002372A/en
Priority to US08/093,000 priority patent/US5388602A/en
Priority to CN93109310A priority patent/CN1046221C/en
Priority to RU93049260A priority patent/RU2129053C1/en
Priority to MX9304606A priority patent/MX9304606A/en
Priority to BR9303050A priority patent/BR9303050A/en
Publication of ITUD920172A1 publication Critical patent/ITUD920172A1/en
Application granted granted Critical
Publication of IT1260282B publication Critical patent/IT1260282B/en

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Abstract

An appts. for descaling blooms, thin slabs and billets (11) immediately after moulding and just before rolling mill stands comprises telescopic arms (12, 13) that spray water via nozzles (14a, 14b) on to the slab (11) as the arms are stroked parallel to the slab. This water jet descales the slab and the water is shut-off during the return stroke, both to conserve water and allow tempering of even thin slabs without overcooling. This is best achieved if the spray leads (14) are stroked at 1.5 to 20 m/min. and pref. 4-10 m/min. relative to the slab. The two arms (12a, 12b) can start their descaling, water-jetting stroke from opposite ends (16, 21) of the slab. This action is most effective with thin slabs as coating and distortion are minimised. The spray nozzles (14) can spin relative to the arms at 1.75 to 3.5m/sec. with a water pressure of 3 to 25 kg/cm2, to remove scale more effectively, a cover being used to protect the slab surface from water during the return stroke. Two or more nozzles (14) can be used to fully cover the slab surface with water jets for efficient descaling. These can be staggered to produce a gradual descaling action and can be placed pref. 50 to 100mm from the slab surface and inclined at 10-30 degrees for effective descaling. Water can be pumped at 600 to 700 bar to spray nozzle heads spinning at each end of the telescopic arms. This reduces the required water flow rate, to further conserve water.
IT000172 1992-07-30 1992-11-23 Appts. for descaling blooms, thin slabs and billets - comprises telescopic arms with nozzle that spray descaling water as they stroke parallel to slab and shut-off the water on return stroke to conserve water. IT1260282B (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
IT000172 IT1260282B (en) 1992-11-23 1992-11-23 Appts. for descaling blooms, thin slabs and billets - comprises telescopic arms with nozzle that spray descaling water as they stroke parallel to slab and shut-off the water on return stroke to conserve water.
AT93110927T ATE158729T1 (en) 1992-07-31 1993-07-08 DESCALE DEVICE USING WATER
EP93110927A EP0586823B1 (en) 1992-07-31 1993-07-08 Descaling device employing water
ES93110927T ES2108170T3 (en) 1992-07-31 1993-07-08 DECHARGING DEVICE USING WATER.
DE69314275T DE69314275T2 (en) 1992-07-31 1993-07-08 Descaling device using water
US08/093,000 US5388602A (en) 1992-07-31 1993-07-19 Descaling device employing water
KR1019930013525A KR940002372A (en) 1992-07-31 1993-07-19 Descaling device using water
CN93109310A CN1046221C (en) 1992-07-30 1993-07-29 Descaling device employing mater
RU93049260A RU2129053C1 (en) 1992-07-31 1993-07-30 Method and apparatus for descaling with use of water
MX9304606A MX9304606A (en) 1992-07-31 1993-07-30 DESCALING DEVICE USING WATER.
BR9303050A BR9303050A (en) 1992-07-31 1993-07-30 DE-SCALING DEVICE USING WATER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000172 IT1260282B (en) 1992-11-23 1992-11-23 Appts. for descaling blooms, thin slabs and billets - comprises telescopic arms with nozzle that spray descaling water as they stroke parallel to slab and shut-off the water on return stroke to conserve water.

Publications (3)

Publication Number Publication Date
ITUD920172A0 ITUD920172A0 (en) 1992-11-23
ITUD920172A1 ITUD920172A1 (en) 1994-05-24
IT1260282B true IT1260282B (en) 1996-04-03

Family

ID=11421176

Family Applications (1)

Application Number Title Priority Date Filing Date
IT000172 IT1260282B (en) 1992-07-30 1992-11-23 Appts. for descaling blooms, thin slabs and billets - comprises telescopic arms with nozzle that spray descaling water as they stroke parallel to slab and shut-off the water on return stroke to conserve water.

Country Status (1)

Country Link
IT (1) IT1260282B (en)

Also Published As

Publication number Publication date
ITUD920172A0 (en) 1992-11-23
ITUD920172A1 (en) 1994-05-24

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19971126