CN103759537A - Construction method for low-cement refractory castables at bottom of stepping heating furnace - Google Patents
Construction method for low-cement refractory castables at bottom of stepping heating furnace Download PDFInfo
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- CN103759537A CN103759537A CN201410020631.XA CN201410020631A CN103759537A CN 103759537 A CN103759537 A CN 103759537A CN 201410020631 A CN201410020631 A CN 201410020631A CN 103759537 A CN103759537 A CN 103759537A
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Abstract
The invention discloses a construction method for low-cement refractory castables at the bottom of a stepping heating furnace. The construction method includes the following steps: step 1, evenly adding anti-explosion fibers during stirring of the low-cement refractory castables for a furnace-end roasting and heating high-temperature section of the stepping heating furnace, and evenly adding the anti-explosion fibers during stirring of the low-cement refractory castables for the middle portion and the tail of the stepping heating furnace; step 2, after casting molding of the low-cement refractory castables of the head, the middle portion and the tail of the stepping heating furnace, inserting a plurality of wood bars into the low-cement refractory castables to form exhaust holes; after hardening of the low-cement refractory castables of the head, the middle portion and the tail of the stepping heating furnace, entering a roasting stage. The roasting stage refers that moisture of the molded low-cement castables is evaporated to stimulate the sintering process at the high temperature. A temperature rise curve of a roasting process system is complied with during roasting of an oven. By the construction method, bursting and collapsing during roasting of the low-cement refractory castables at the bottom of the stepping heating furnace are avoided, maintenance of the heating furnace is ensured to be completed on time, and steel rolling productivity is improved.
Description
Technical field
The present invention relates to step heating-furnace construction method field, refer more particularly to a kind of step heating-furnace furnace bottom low-cement refractory pouring material construction method.
Background technology
At present, the heating furnace body of China low-cement refractory pouring material material used is with SiO
2, Al
2o
3system is main, and its bonding agent is take aluminate cement as main high-early-strength type cement.Low-cement refractory pouring material has strict process system to maintenance and baking.Therefore castable refractory, after construction, must be carried out roast technic system, and its required furnace drying time reached about 7 days.Tradition step heating-furnace furnace bottom major part is combined into main low-cement refractory pouring material in order to the hydraulicity, and cast-in-site is in aggregates.Metallurgical Metallurgical Enterprise exists that production task is heavy, the shutdown maintenance time is short.If violate low cement deposit material baking process system while toasting after maintenance, baker speed is too fast, the especially castable of heating furnace burner heat supply privileged sites, and there is the quick-fried phenomenon of collapsing of castable in tend.The heating furnace blowing out of having to is overhauled again like this, certainly will will again change low cement deposit material.Not only waste refractory material, more crucial is to have extended maintenance duration, to enterprise, produces and brings huge loss.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point of the prior art and provide one to add the measures such as anti-knock agent and reserved steam vent, avoid the low cement deposit material phenomenon that explosion is caved in baking of Bottom of Heating Furnace, guarantee that heating furnace maintenance completes on time, improves the step heating-furnace furnace bottom low-cement refractory pouring material construction method of steel rolling production operational availability.
The present invention realizes in the following way:
A kind of step heating-furnace furnace bottom low-cement refractory pouring material construction method, is characterized in that: comprise the following steps:
The first step: toast the low cement deposit material of heat supply high temperature section for the burner of step heating-furnace, evenly add 0.4% explosion-proof fiber when stirring; For the stove of step heating-furnace and the low cement deposit material of stove tail, when stirring, evenly add 0.3% explosion-proof fiber;
Second step: when in step heating-furnace burner, stove and after the low cement deposit material moulding by casting of stove tail, rapidly some Ф 6mm wooden sticks are inserted in low cement deposit material and form steam vent, wooden stick length should exceed the 45-55mm on the low cement deposit material of furnace bottom top; The spacing of the steam vent in step heating-furnace burner baking heat supply high temperature section is 400mm × 400mm, and the spacing of the steam vent in step heating-furnace stove and in stove tail is 200mm × 200mm;
When in step heating-furnace burner, stove and after the low cement deposit material sclerosis of stove tail, enter the baker stage; Baker is that the moisture in the low cement deposit material of moulding is evaporated away, and at high temperature acceleration of sintering process improves the physical property of low cement deposit material; The heating curve of observing roast technic system in the process of baker baking, especially before 350 ℃, controlling programming rate can not be too fast.
Beneficial effect of the present invention is: for low cement deposit material, the programming rate of baking process is had to strict demand, proposition is in low cement deposit material work progress, take to add the measures such as anti-knock agent and reserved steam vent, avoid the low cement deposit material phenomenon that explosion is caved in baking of Bottom of Heating Furnace, guarantee that heating furnace maintenance completes on time, improves steel rolling production operational availability.
The specific embodiment
The specific embodiment of the invention is now described in detail in detail:
A kind of step heating-furnace furnace bottom low-cement refractory pouring material construction method, comprises the following steps: the first step: for the burner of step heating-furnace, toast the low cement deposit material of heat supply high temperature section, evenly add 0.4% explosion-proof fiber when stirring; For the stove of step heating-furnace and the low cement deposit material of stove tail, when stirring, evenly add 0.3% explosion-proof fiber; Second step: when in step heating-furnace burner, stove and after the low cement deposit material moulding by casting of stove tail, rapidly some Ф 6mm wooden sticks are inserted in low cement deposit material and form steam vent, wooden stick length should exceed the 45-55mm on the low cement deposit material of furnace bottom top; Free water in low like this cement deposit material is discharged fully by reserved steam vent; The spacing of the steam vent in step heating-furnace burner baking heat supply high temperature section is 400mm × 400mm, and the spacing of the steam vent in step heating-furnace stove and in stove tail is 200mm × 200mm; When in step heating-furnace burner, stove and after the low cement deposit material sclerosis of stove tail, enter the baker stage; Baker is that the moisture in the low cement deposit material of moulding is evaporated away, and at high temperature acceleration of sintering process improves the physical property of low cement deposit material; The heating curve of observing roast technic system in the process of baker baking, especially before 350 ℃, controlling programming rate can not be too fast.
Claims (1)
1. a step heating-furnace furnace bottom low-cement refractory pouring material construction method, is characterized in that: comprise the following steps:
The first step: toast the low cement deposit material of heat supply high temperature section for the burner of step heating-furnace, evenly add 0.4% explosion-proof fiber when stirring; For the stove of step heating-furnace and the low cement deposit material of stove tail, when stirring, evenly add 0.3% explosion-proof fiber;
Second step: when in step heating-furnace burner, stove and after the low cement deposit material moulding by casting of stove tail, rapidly some Ф 6mm wooden sticks are inserted in low cement deposit material and form steam vent, wooden stick length should exceed the 45-55mm on the low cement deposit material of furnace bottom top; The spacing of the steam vent in step heating-furnace burner baking heat supply high temperature section is 400mm × 400mm, and the spacing of the steam vent in step heating-furnace stove and in stove tail is 200mm × 200mm;
When in step heating-furnace burner, stove and after the low cement deposit material sclerosis of stove tail, enter the baker stage; Baker is that the moisture in the low cement deposit material of moulding is evaporated away, and at high temperature acceleration of sintering process improves the physical property of low cement deposit material; The heating curve of observing roast technic system in the process of baker baking, especially before 350 ℃, controlling programming rate can not be too fast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410020631.XA CN103759537A (en) | 2014-01-17 | 2014-01-17 | Construction method for low-cement refractory castables at bottom of stepping heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410020631.XA CN103759537A (en) | 2014-01-17 | 2014-01-17 | Construction method for low-cement refractory castables at bottom of stepping heating furnace |
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| CN103759537A true CN103759537A (en) | 2014-04-30 |
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| CN201410020631.XA Pending CN103759537A (en) | 2014-01-17 | 2014-01-17 | Construction method for low-cement refractory castables at bottom of stepping heating furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451088A (en) * | 2014-11-04 | 2015-03-25 | 江苏华菱锡钢特钢有限公司 | Double-carriage dry-type sealing device of walking beam heating furnace |
| CN105174976A (en) * | 2015-08-05 | 2015-12-23 | 攀钢集团攀枝花钢钒有限公司 | Pouring method of straight tube furnace lining for vanadium iron alloy smelting |
| CN111761689A (en) * | 2020-07-14 | 2020-10-13 | 刘灿普 | Preparation method of partition plate module for steelmaking |
| CN114262237A (en) * | 2022-02-28 | 2022-04-01 | 北京市一滴水环保科技有限公司 | Light microporous ceramic filter material and preparation method thereof, and ceramic particles for water treatment and filtration and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451088A (en) * | 2014-11-04 | 2015-03-25 | 江苏华菱锡钢特钢有限公司 | Double-carriage dry-type sealing device of walking beam heating furnace |
| CN104451088B (en) * | 2014-11-04 | 2017-06-27 | 江苏华菱锡钢特钢有限公司 | A kind of step heating-furnace dry-type encapsulated device of double plankers |
| CN105174976A (en) * | 2015-08-05 | 2015-12-23 | 攀钢集团攀枝花钢钒有限公司 | Pouring method of straight tube furnace lining for vanadium iron alloy smelting |
| CN111761689A (en) * | 2020-07-14 | 2020-10-13 | 刘灿普 | Preparation method of partition plate module for steelmaking |
| CN114262237A (en) * | 2022-02-28 | 2022-04-01 | 北京市一滴水环保科技有限公司 | Light microporous ceramic filter material and preparation method thereof, and ceramic particles for water treatment and filtration and preparation method thereof |
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Application publication date: 20140430 |