CN102994673A - Process method for pressing-in management of temperature rising of side wall of blast furnace hearth - Google Patents
Process method for pressing-in management of temperature rising of side wall of blast furnace hearth Download PDFInfo
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- CN102994673A CN102994673A CN2012105739059A CN201210573905A CN102994673A CN 102994673 A CN102994673 A CN 102994673A CN 2012105739059 A CN2012105739059 A CN 2012105739059A CN 201210573905 A CN201210573905 A CN 201210573905A CN 102994673 A CN102994673 A CN 102994673A
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Abstract
The invention relates to a process method for pressing-in management of temperature rising of a side wall of a blast furnace hearth, which is characterized by adopting the following process steps of: drilling a hole on a furnace shell: drilling a fireproof material pressing-in hole at a selected drilling position on the furnace shell of a blast furnace, wherein the drilled depth of the fireproof material pressing-in hole penetrates through a cooling wall to reach an in-furnace carbon brick position; mounting a high-pressure spherical valve; controlling pressure and a material amount, wherein the initial pressing-in pressure is 5-30 MPa and the normal pressing-in pressure is 2-25 MPa; and guaranteeing the pressure of fireproof materials in the furnace is 1-5 MPa. The process method disclosed by the invention is low in cost and short in furnace stopping time; the high-heat-conduction fireproof materials are pressed into a coal blowby gap between a heat surface of the cooling wall and a furnace cylinder carbon brick by pressing-in process and equipment to block coal blowby; and the high-heat-conduction fireproof materials are communicated with a heat conduction flow again so that the heat in the furnace is smoothly led out and the aims of reducing the temperature of the side wall of a furnace cylinder and guaranteeing the safe production and operation of the blast furnace are achieved.
Description
Technical field
The invention belongs to a kind ofly for metallurgy industry blast-furnace smelting and maintenance technology field, particularly a kind of blast furnace hearth side wall temperatures raises and is pressed into the processing method of improvement.
Background technology
Blast furnace is big or middle to be repaiied with some newly-built blast furnaces and goes into operation after the operation, produce the unusual phenomenon that raises of blast furnace hearth side wall temperatures, its reason is to produce the slit between cooling stave and cupola well refractory materials, the hot blast blowby, so that the cupola well side wall temperatures raises unusually, the cupola well refractory materials increases the risk of hearth breakout for a long time in condition of high temperature meeting accelerated erosion.The unusual tradition improvement method that raises of improvement blast furnace hearth side wall temperatures normally adopts the conservative ways such as furnace retaining in the stove, reduction combustion intensity, minimizing output to keep production, these method costs are high, cycle is long, seriously restrict furnace processor, also fundamentally do not solved the problem that temperature of the furnace hearth raises.
Summary of the invention
The present invention has overcome the defective that traditional improvement method exists, and purpose is to provide a kind of blast furnace hearth side wall temperatures rising to be pressed into the processing method of improvement for solving unusual rising of blast furnace hearth side wall temperatures.
Blast furnace hearth side wall temperatures of the present invention raises and is pressed into the processing method content Description of improvement:
Blast furnace hearth side wall temperatures of the present invention raises and is pressed into the processing method of improvement, it is characterized in that adopting following processing step:
(1) stove skin perforate: by calculating, at the selected bore position of shell of blast furnace, get out refractory materials and be pressed into the hole, be pressed into hole drill and enter the degree of depth and cross cooling stave and arrive cupola well brick fuel position, and the installation high-voltage ball valve;
(2) pressure and material amount control: by the press-fit equipment unit, with conveying cylinder, the high-pressure delivery sebific duct of cupola well special-purpose fire-resistant material by being pressed into unit, be pressed into muzzle, high-pressure ball valve, be pressed into the hole and be pressed into brick fuel slit fault location in the stove, be pressed into and close high-pressure ball valve when finishing, the refractory materials amount of being pressed into is by press-fit equipment Controlling System adjustment control, press-in speed is controlled in per minute 10～75 ㎏ scopes, stepless adjustment;
(3) strictly control pressure in the process of press in by the supervisory system of press-fit equipment in the process of press in, guarantee the safety of body of heater.
The perforate of stove skin: adopt the screw thread short tube of welding diameter Φ 30-50 ㎜, length 50-100 ㎜ to connect, the high-pressure ball valve that Φ 30-50 ㎜, withstand voltage 1-5MPa are installed, is threaded is pressed into the hole as refractory materials and uses; Open 10-20 hole at the cupola well periphery, stove skin opening diameter Φ 15-50 ㎜, refractory materials are pressed into the hole and see through stove skin and cooling stave, and the degree of depth is 200-500 ㎜, arrive brick fuel position in the stove;
Pressure and the control of material amount: by the press-fit equipment unit, with mud cylinder, the high-pressure delivery sebific duct of cupola well special-purpose fire-resistant material by being pressed into unit, be pressed into muzzle, high-pressure ball valve, be pressed into the hole and enter into place, brick fuel slit in the stove, be pressed into and close high-pressure ball valve when finishing, the preparation of construction pressure-controlling is at the highest 30MPa that is no more than, the stove skin is pressed into the hole pressure-controlling at 1～5 MPa, every hole is pressed into the refractory materials amount take pressure as control criterion, the refractory materials that is pressed into is controlled in per minute 10～75 ㎏ scopes by the adjustment of press-fit equipment Controlling System, stepless adjustment;
The original pressure that is pressed in the process of press in is 5-30MPa, and standard atmosphere pressure is 2-25MPa, and refractory materials pressure is 1-5MPa in the stove.
The present invention is that a kind of cost is low, a kind of blast furnace hearth side wall temperatures rising of furnace outage time weak point is pressed into the method for improvement, with high heat conduction, high-intensity refractory materials, refractory materials is pressed in the coal gas blowby slit of the hot side of cooling stave and cupola well brick fuel by being pressed into Processes and apparatus, the blowby of blocking-up coal gas, the refractory materials of high heat conduction is communicated with heat conduction stream again, furnace heat is derived smoothly, reach and reduce refractory temperatures in the stove, guarantee the purpose of blast furnace safety production run.
Embodiment
Blast furnace hearth side wall temperatures of the present invention raises and is pressed into the processing method of improvement, is achieved in that through the basis in industrial experimentation research and adopts following processing step:
(1) stove skin perforate: by calculating, at the selected bore position of shell of blast furnace, get out refractory materials and be pressed into the hole, be pressed into hole drill and enter the degree of depth and cross cooling stave and arrive cupola well brick fuel position, and the installation high-voltage ball valve;
(2) pressure and material amount control: by the press-fit equipment unit, with conveying cylinder, the high-pressure delivery sebific duct of cupola well special-purpose fire-resistant material by being pressed into unit, be pressed into muzzle, high-pressure ball valve, be pressed into the hole and be pressed into brick fuel slit fault location in the stove, be pressed into and close high-pressure ball valve when finishing, the refractory materials amount of being pressed into is by press-fit equipment Controlling System adjustment control, press-in speed is controlled in per minute 10～75 ㎏ scopes, stepless adjustment;
(3) strictly control pressure in the process of press in by the supervisory system of press-fit equipment in the process of press in, guarantee the safety of body of heater.
The perforate of stove skin: adopt the screw thread short tube of welding diameter Φ 30-50 ㎜, length 50-100 ㎜ to connect, the high-pressure ball valve that Φ 30-50 ㎜, withstand voltage 1-5MPa are installed, is threaded is pressed into the hole as refractory materials and uses; Open 10-20 hole at the cupola well periphery, stove skin opening diameter Φ 15-50 ㎜, refractory materials are pressed into the hole and see through stove skin and cooling stave, and the degree of depth is 200-500 ㎜, arrive brick fuel position in the stove; Pressure and the control of material amount: by the press-fit equipment unit, with mud cylinder, the high-pressure delivery sebific duct of cupola well special-purpose fire-resistant material by being pressed into unit, be pressed into muzzle, high-pressure ball valve, be pressed into the hole and enter into place, brick fuel slit in the stove, be pressed into and close high-pressure ball valve when finishing, the preparation of construction pressure-controlling is at the highest 30MPa that is no more than, the stove skin is pressed into the hole pressure-controlling at 1～5 MPa, every hole is pressed into the refractory materials amount take pressure as control criterion, the refractory materials that is pressed into is controlled in per minute 10～75 ㎏ scopes by the adjustment of press-fit equipment Controlling System, stepless adjustment; The original pressure that is pressed in the process of press in is 5-30MPa, and standard atmosphere pressure is 2-25MPa, and refractory materials pressure is 1-5MPa in the stove.
Be described as follows by embodiment:
Certain blast furnace useful volume is 1800m
3, it is higher that the operation of going into operation produced the cupola well temperatures at localized regions after 20 days, and top temperature reaches more than 1000 ℃, analyzes reason: 1, be owing to constructing operation in the capital construction process is improper, produce defective between cupola well brick fuel and the cooling stave, the cupola well side wall temperatures is raise; 2, be because after the production run, expanded by heating affects, and the thermal expansivity of furnace shell steel construction and refractory materials is not mated, and causes between cupola well brick fuel and the cooling stave and produces the slit, the cupola well side wall temperatures is raise; 3, be because carbonaceous clay or carbonaceous ramming mass shrinkage cracking raise the cupola well side wall temperatures; 4, be because the heat conductivility of carbonaceous clay or carbonaceous ramming mass does not reach design requirements, the cupola well side wall temperatures is raise.
Administering the rising of cupola well side wall temperatures adopts blast furnace hearth side wall temperatures rising of the present invention to be pressed into the processing method of improvement, at first carry out the perforate of stove skin: guaranteeing on the shell of blast furnace in the situation that cooling stave is perfectly safe, adopt the screw thread short tube of welding diameter Φ 50 ㎜, length 100 ㎜ to connect, the high-pressure ball valve that Φ 50 ㎜, withstand voltage 1.6 MPa are installed, is threaded is pressed into the hole as refractory materials and uses; 15 of cupola well periphery perforates, stove skin opening diameter Φ 28 ㎜, refractory materials are pressed into the hot side that the hole sees through stove skin and cooling stave, and the degree of depth is 310 ㎜, arrive cupola well brick fuel position.
Pressure and the control of material amount: by the press-fit equipment unit, with mud cylinder, the high-pressure delivery sebific duct of cupola well special-purpose fire-resistant material by being pressed into unit, be pressed into muzzle, high-pressure ball valve, be pressed into the hole and enter into place, brick fuel slit in the stove, be pressed into and close high-pressure ball valve when finishing, the preparation of construction pressure-controlling is at the highest 30MPa that is no more than, the refractory materials pressure-controlling is at 1～5 MPa, every hole refractory materials amount is take pressure as control criterion, the refractory materials that is pressed into is controlled at stepless adjustment in per minute 10～75 ㎏ scopes, 12 tons of the refractory materials amounts that is pressed into by the adjustment of press-fit equipment Controlling System.
Strictly control pressure in the process of press in by the supervisory system of press-fit equipment in the process of press in, guarantee the safety of furnace binding, the original pressure that is pressed into is 15MPa, and the pressure that normally is pressed into is 5MPa, and furnace pressure is 2MPa.
Eliminated the coal gas blowby passage in the cupola well sidewall after the enforcement, the capacity of heat transmission of cupola well sidewall refractory materials improves, and the cupola well side wall temperatures significantly descends.
The present invention be directed in the maintaining blast furnace technology and to prolong generation furnace life, get rid of and administer a kind of method that a kind of cost is low, furnace outage time is lacked of the critical defect that affect blast furnace campaign.The processing method that the rising of blast furnace hearth side wall temperatures is pressed into improvement has broken through traditional improvement technical matters, by special specific equipment be pressed into processing method, the refractory materials of cupola well special use is pressed in cooling stave hot side and the cupola well brick fuel slit, the blowby of blocking-up coal gas, the refractory materials of high heat conduction is communicated with heat conduction stream again, having guaranteed derives furnace heat smoothly, reaches to reduce the cupola well side wall temperatures, guarantees the purpose of blast furnace safety production run.
Claims (2)
1. a blast furnace hearth side wall temperatures raises and is pressed into the processing method of improvement, it is characterized in that adopting following processing step:
(1) stove skin perforate: by calculating, at the selected bore position of shell of blast furnace, get out refractory materials and be pressed into the hole, be pressed into hole drill and enter the degree of depth and cross cooling stave and arrive cupola well brick fuel position, and the installation high-voltage ball valve;
(2) pressure and material amount control: by the press-fit equipment unit, with conveying cylinder, the high-pressure delivery sebific duct of cupola well special-purpose fire-resistant material by being pressed into unit, be pressed into muzzle, high-pressure ball valve, be pressed into the hole and be pressed into brick fuel slit fault location in the stove, be pressed into and close high-pressure ball valve when finishing, the refractory materials amount of being pressed into is by press-fit equipment Controlling System adjustment control, press-in speed is controlled in per minute 10～75 ㎏ scopes, stepless adjustment;
(3) strictly control pressure in the process of press in by the supervisory system of press-fit equipment in the process of press in, guarantee the safety of body of heater.
2. blast furnace hearth side wall temperatures according to claim 1 raises and is pressed into the processing method of improvement, it is characterized in that:
The perforate of stove skin: adopt the screw thread short tube of welding diameter Φ 30-50 ㎜, length 50-100 ㎜ to connect, the high-pressure ball valve that Φ 30-50 ㎜, withstand voltage 1-5MPa are installed, is threaded is pressed into the hole as refractory materials and uses; Open 10-20 hole at the cupola well periphery, stove skin opening diameter Φ 15-50 ㎜, refractory materials are pressed into the hole and see through stove skin and cooling stave, and the degree of depth is 200-500 ㎜, arrive brick fuel position in the stove;
Pressure and the control of material amount: by the press-fit equipment unit, with mud cylinder, the high-pressure delivery sebific duct of cupola well special-purpose fire-resistant material by being pressed into unit, be pressed into muzzle, high-pressure ball valve, be pressed into the hole and enter into place, brick fuel slit in the stove, be pressed into and close high-pressure ball valve when finishing, the preparation of construction pressure-controlling is at the highest 30MPa that is no more than, the stove skin is pressed into the hole pressure-controlling at 1～5 MPa, every hole is pressed into the refractory materials amount take pressure as control criterion, the refractory materials that is pressed into is controlled in per minute 10～75 ㎏ scopes by the adjustment of press-fit equipment Controlling System, stepless adjustment;
The original pressure that is pressed in the process of press in is 5-30MPa, and standard atmosphere pressure is 2-25MPa, and refractory materials pressure is 1-5MPa in the stove.
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| CN2012105739059A CN102994673A (en) | 2012-12-26 | 2012-12-26 | Process method for pressing-in management of temperature rising of side wall of blast furnace hearth |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5732310A (en) * | 1980-08-05 | 1982-02-22 | Sumitomo Metal Ind Ltd | Method for repairing wall of blast furnace |
| US4340349A (en) * | 1980-01-11 | 1982-07-20 | Cary Larry R | Apparatus for repairing hot spots in a refractory lined wall |
| CN101289698A (en) * | 2008-06-06 | 2008-10-22 | 武汉宏程冶金材料有限公司 | Blast furnace pressing-in grouting and lining-making construction method |
| CN101649365A (en) * | 2009-09-15 | 2010-02-17 | 山西太钢不锈钢股份有限公司 | Grouting method for blast furnace |
| CN101886153A (en) * | 2010-06-22 | 2010-11-17 | 武汉威林炉衬材料有限责任公司 | Maintenance method for blast furnace hearth |
| CN102392086A (en) * | 2011-11-21 | 2012-03-28 | 安阳钢铁股份有限公司 | Large blast furnace body gas leakage prevention method |
-
2012
- 2012-12-26 CN CN2012105739059A patent/CN102994673A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340349A (en) * | 1980-01-11 | 1982-07-20 | Cary Larry R | Apparatus for repairing hot spots in a refractory lined wall |
| JPS5732310A (en) * | 1980-08-05 | 1982-02-22 | Sumitomo Metal Ind Ltd | Method for repairing wall of blast furnace |
| CN101289698A (en) * | 2008-06-06 | 2008-10-22 | 武汉宏程冶金材料有限公司 | Blast furnace pressing-in grouting and lining-making construction method |
| CN101649365A (en) * | 2009-09-15 | 2010-02-17 | 山西太钢不锈钢股份有限公司 | Grouting method for blast furnace |
| CN101886153A (en) * | 2010-06-22 | 2010-11-17 | 武汉威林炉衬材料有限责任公司 | Maintenance method for blast furnace hearth |
| CN102392086A (en) * | 2011-11-21 | 2012-03-28 | 安阳钢铁股份有限公司 | Large blast furnace body gas leakage prevention method |
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Application publication date: 20130327 |