GB2039009A - Lining a skull-furnace water- cooled hearth with a refractory material - Google Patents

Lining a skull-furnace water- cooled hearth with a refractory material Download PDF

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Publication number
GB2039009A
GB2039009A GB7900466A GB7900466A GB2039009A GB 2039009 A GB2039009 A GB 2039009A GB 7900466 A GB7900466 A GB 7900466A GB 7900466 A GB7900466 A GB 7900466A GB 2039009 A GB2039009 A GB 2039009A
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United Kingdom
Prior art keywords
hearth
water
furnace
refractory
lining
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Granted
Application number
GB7900466A
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GB2039009B (en
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RYAZAN Z PROIZV I OBRADOTKE TS
SP KONSTRUKT BJURO TYAZHEL TSV
Original Assignee
RYAZAN Z PROIZV I OBRADOTKE TS
SP KONSTRUKT BJURO TYAZHEL TSV
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Application filed by RYAZAN Z PROIZV I OBRADOTKE TS, SP KONSTRUKT BJURO TYAZHEL TSV filed Critical RYAZAN Z PROIZV I OBRADOTKE TS
Priority to GB7900466A priority Critical patent/GB2039009B/en
Publication of GB2039009A publication Critical patent/GB2039009A/en
Application granted granted Critical
Publication of GB2039009B publication Critical patent/GB2039009B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1621—Making linings by using shaped elements, e.g. bricks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements

Abstract

The water-cooled hearth of a skull furnace, for use in ferrous or non- ferrous metallurgy, is lined by laying a single course of refractory bricks on the hearth with gaps between adjacent bricks of 5 to 50 mm. A molten material heated to a temperature 150 to 200 DEG C above its melting point is then poured over the bricks at a flow rate of 0.1 to 0.3 t/m<2> per min, at the same time as cooling water is supplied to the hearth water- cooling elements at a flow rate of 0.1 to 0.3 m<3>/m<2> per min.

Description

SPECIFICATION Lining a skull4urnace water-cooled hearth with a refractory material The present invention relates to a method of lining a water-cooled hearth of a skull furnace with a refractory material, and to a skull furnace with a refractory lining.
This invention provides a method of lining a water-cooled hearth of a skull furnace, wherein a single course of refractory bricks are laid on the hearth with gaps between adjacent bricks of 5 to 50mm, a molten material heated 150 to 2000C above its melting temperature is poured over the bricks at a flow rate of 0.1 to 0.3 t/m2 per min, and cooling water is concurrently supplied to the hearth water-cooling elements at a flow rate of 0.1 to 0.3 m3/m2 per min.
When the molten material is cooled and solidified, a solid refractory lining results which has a materially increased resistance during subsequent furnace operation.
The invention also provides a skull furnace which has been lined by the foregoing method.
The method according to the invention is carried out as follows. A single course of refractory or fire bricks are laid on a pre-cleaned surface of a furnace hearth with a gap of 5 to 50mm between adjacent bricks. A molten material, heated 1 50 to 2000C above its melting temperature, is then poured over the bricks.
It is preferable to use furnace-treated materials, such as tin-containing slags, ores or concentrates for pouring over the bricks.
The pouring operation is carried out at a flow rate of 0.1 to 0.3 t/m2 per min; in the course of.the pouring operation the hearth is cooled with water supplied to hearth watercooling elements at a flow rate of 0.1 to 0.3 m3/m2 per min.
The method of the invention is superior to priorart methods in that it permits the refractory lining process to be simplified, and the service life af the refractory lining, as well-asthat of the furnace hearth, to be increased by as much as three times.
The invention will be further described with reference to the following illustrative Examples.
EXAMPLE 1 A water-cooled surface of a fuming furnace hearth is precleaned to allow magnesite-chrome bricks to be laid thereon in a single course with gaps at the joints of 5 to 50 mm, whereupon molten slag overheated by 1500 above the melting temperature thereof is poured therein at the flow rate of 0.1 t/m2 per min, as water is concurrently passed to the hearth water-cooling elements at the flow rate of 0.2 m3/m2 per min.
The life service of the refractory lining of the fuming-furnace hearth, employed for the treatment of tin-containing slags, composed of 30 wt.% FeO, 35- wt.% SiO; 1-0 wt.%CaO, 1 wt.%SnO, is 85 days at an operating temperature of 1 3000C.
EXAMPLE 2 A furnace hearth, prepared for lining with a refractory as described in Example 1, is poured with slag overheated by 1800C above its meltingtemperature and delivered at the flow rate of 0.2 t/m2 per min, as water is concurrently passed to the hearth water cooling elements at the flow rate of 0.25 m3/m2 per min.
The service life of the refractory lining used under conditions described in Example 1 was 90 days.
EXAMPLE 3 A furnace hearth, prepared for lining with a refractory as described in Example 1, is poured with molten slag over-heated by 2000C above its melting temperature and delivered at the flow rate of 0.3 t/m2 per min, as water is concurrently supplied to the hearth water-cooling elements at the flow rate of 0.3 m3/m2 per min.
The service life of the refractory lining used under conditions described in Example 1 was 80 days.
With the prior-art method of lining the furnace hearth with a refractory, wherein the bricks are fixed with cores, the service life of the refractory lining used under similar conditions of the furnace operation was 28 days.
1. A method of lining a water-cooled hearth of a skull furnace, wherein a single course of refractory bricks are laid on the hearth with gaps between adjacent bricks of 5 to 50mm, a molten material heated 1 50 to 2000C above its melting temperature is poured over the bricks at a flow rate of 0.1 to 0.3 t/m2 per min, and cooling water is concurrently supplied to the hearth watercooling elements at a flow rate of 0.1 to 0.3 m3/m2 per min.
2. A method according to claim 1, wherein the molten material is a product of a reaction in the furnace.
3. A method according to claim 1 or claim 2, wherein the molten material is a tin-containing slag.
4. A method of lining a water-cooled hearth of a skull furnace with a refractory, substantially as herein described and illustrated in any one of Examples 1 to 3.
5. A skull furnace which has been lined by the method of any preceding claim.
6. A lined skull furnace substantially as herein described with reference to any one of the foregoing Examples.
7. A method for lining a water-cooled hearth of a skull furnace with a refractory, consisting in that fire bricks are laid on the hearth in one-stone course with gaps at joint of 5 to 50 mm, whereupon said brickwork is poured with a molten material overheated by 1 50 to 2000C above its melting temperature and delivered at the flow rate
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Lining a skull4urnace water-cooled hearth with a refractory material The present invention relates to a method of lining a water-cooled hearth of a skull furnace with a refractory material, and to a skull furnace with a refractory lining. This invention provides a method of lining a water-cooled hearth of a skull furnace, wherein a single course of refractory bricks are laid on the hearth with gaps between adjacent bricks of 5 to 50mm, a molten material heated 150 to 2000C above its melting temperature is poured over the bricks at a flow rate of 0.1 to 0.3 t/m2 per min, and cooling water is concurrently supplied to the hearth water-cooling elements at a flow rate of 0.1 to 0.3 m3/m2 per min. When the molten material is cooled and solidified, a solid refractory lining results which has a materially increased resistance during subsequent furnace operation. The invention also provides a skull furnace which has been lined by the foregoing method. The method according to the invention is carried out as follows. A single course of refractory or fire bricks are laid on a pre-cleaned surface of a furnace hearth with a gap of 5 to 50mm between adjacent bricks. A molten material, heated 1 50 to 2000C above its melting temperature, is then poured over the bricks. It is preferable to use furnace-treated materials, such as tin-containing slags, ores or concentrates for pouring over the bricks. The pouring operation is carried out at a flow rate of 0.1 to 0.3 t/m2 per min; in the course of.the pouring operation the hearth is cooled with water supplied to hearth watercooling elements at a flow rate of 0.1 to 0.3 m3/m2 per min. The method of the invention is superior to priorart methods in that it permits the refractory lining process to be simplified, and the service life af the refractory lining, as well-asthat of the furnace hearth, to be increased by as much as three times. The invention will be further described with reference to the following illustrative Examples. EXAMPLE 1 A water-cooled surface of a fuming furnace hearth is precleaned to allow magnesite-chrome bricks to be laid thereon in a single course with gaps at the joints of 5 to 50 mm, whereupon molten slag overheated by 1500 above the melting temperature thereof is poured therein at the flow rate of 0.1 t/m2 per min, as water is concurrently passed to the hearth water-cooling elements at the flow rate of 0.2 m3/m2 per min. The life service of the refractory lining of the fuming-furnace hearth, employed for the treatment of tin-containing slags, composed of 30 wt.% FeO, 35- wt.% SiO; 1-0 wt.%CaO, 1 wt.%SnO, is 85 days at an operating temperature of 1 3000C. EXAMPLE 2 A furnace hearth, prepared for lining with a refractory as described in Example 1, is poured with slag overheated by 1800C above its meltingtemperature and delivered at the flow rate of 0.2 t/m2 per min, as water is concurrently passed to the hearth water cooling elements at the flow rate of 0.25 m3/m2 per min. The service life of the refractory lining used under conditions described in Example 1 was 90 days. EXAMPLE 3 A furnace hearth, prepared for lining with a refractory as described in Example 1, is poured with molten slag over-heated by 2000C above its melting temperature and delivered at the flow rate of 0.3 t/m2 per min, as water is concurrently supplied to the hearth water-cooling elements at the flow rate of 0.3 m3/m2 per min. The service life of the refractory lining used under conditions described in Example 1 was 80 days. With the prior-art method of lining the furnace hearth with a refractory, wherein the bricks are fixed with cores, the service life of the refractory lining used under similar conditions of the furnace operation was 28 days. CLAIMS
1. A method of lining a water-cooled hearth of a skull furnace, wherein a single course of refractory bricks are laid on the hearth with gaps between adjacent bricks of 5 to 50mm, a molten material heated 1 50 to 2000C above its melting temperature is poured over the bricks at a flow rate of 0.1 to 0.3 t/m2 per min, and cooling water is concurrently supplied to the hearth watercooling elements at a flow rate of 0.1 to 0.3 m3/m2 per min.
2. A method according to claim 1, wherein the molten material is a product of a reaction in the furnace.
3. A method according to claim 1 or claim 2, wherein the molten material is a tin-containing slag.
4. A method of lining a water-cooled hearth of a skull furnace with a refractory, substantially as herein described and illustrated in any one of Examples 1 to 3.
5. A skull furnace which has been lined by the method of any preceding claim.
6. A lined skull furnace substantially as herein described with reference to any one of the foregoing Examples.
7. A method for lining a water-cooled hearth of a skull furnace with a refractory, consisting in that fire bricks are laid on the hearth in one-stone course with gaps at joint of 5 to 50 mm, whereupon said brickwork is poured with a molten material overheated by 1 50 to 2000C above its melting temperature and delivered at the flow rate of 0.1 to 0.3 t/m2 per min, as cooling water is concurrently supplied to the hearth water-cooling elements at the flow rate of 0.1 to 0.3 m3/m2 per min.
GB7900466A 1979-01-05 1979-01-05 Lining a skull-furnace watercooled hearth with a refractory material Expired GB2039009B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7900466A GB2039009B (en) 1979-01-05 1979-01-05 Lining a skull-furnace watercooled hearth with a refractory material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7900466A GB2039009B (en) 1979-01-05 1979-01-05 Lining a skull-furnace watercooled hearth with a refractory material

Publications (2)

Publication Number Publication Date
GB2039009A true GB2039009A (en) 1980-07-30
GB2039009B GB2039009B (en) 1983-01-06

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GB7900466A Expired GB2039009B (en) 1979-01-05 1979-01-05 Lining a skull-furnace watercooled hearth with a refractory material

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GB2039009B (en) 1983-01-06

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