CN104671677A - Maerz lime kiln suspension cylinder construction method - Google Patents

Maerz lime kiln suspension cylinder construction method Download PDF

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Publication number
CN104671677A
CN104671677A CN201310609678.5A CN201310609678A CN104671677A CN 104671677 A CN104671677 A CN 104671677A CN 201310609678 A CN201310609678 A CN 201310609678A CN 104671677 A CN104671677 A CN 104671677A
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China
Prior art keywords
suspension cylinder
baking
mould material
lime kiln
mould
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CN201310609678.5A
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CN104671677B (en
Inventor
徐铁权
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MCC5 Group Shanghai Corp Ltd
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MCC5 Group Shanghai Corp Ltd
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Abstract

The invention relates to a Maerz lime kiln suspension cylinder construction method, which is characterized by comprising: a, prefabricating a baking device, b, arranging a casting mold and a suspension cylinder to carry out casting material construction, c, disassembling the mold, and placing the prefabricated baking device on the lower portion of the casting material, d, connecting a PLC automatic control system, and baking, and e, carrying out magnesia brick masonry. The Maerz lime kiln suspension cylinder construction method of the present invention has advantages of reasonable construction step design, simple operation, substantial Maerz lime kiln suspension cylinder quality improving, maintenance frequency reducing, kiln life prolonging, long-term effect, great long-term benefits adopting the low cost, and competitiveness.

Description

A kind of constructional method of Mialz lime kiln suspension cylinder
Technical field
The present invention relates to a kind of constructional method of limestone kiln, specifically, is a kind of constructional method of Mialz lime kiln suspension cylinder.
Background technology
Mialz lime kiln is a kind of two thorax and flows heat accumulating type limestone kiln, and wherein suspension cylinder is of paramount importance structure in this limestone kiln.In the production process in limestone kiln, its underpart structure is the structure of mould material+magnesia brick, and the long-term Wingdale that meets with clashes into frequently, very easily damages.The construction process of general Mialz lime kiln suspension cylinder first carries out mould material construction, then builds magnesia brick by laying bricks or stones in mould material upper surface.Domesticly at present introduced a part of Mialz lime kiln, its follow-up introduction also will expand further, and the Mialz lime kiln suspension cylinder constructional method of domestic routine is after mould material construction terminates natural curing, namely starts to carry out building by laying bricks or stones of top magnesia brick.Owing to adopting water to stir in mould material construction process, mould material inside configuration contains a large amount of free-waters, in later stage baker process, be combined with magnesia brick after these free-waters are evaporated, make magnesia brick generation hydration, cause magnesia brick cracking, intensity reduction, the part making this position become the most fragile in limestone kiln, needs to overhaul the production that could maintain limestone kiln frequently.
The constructional method of therefore known Mialz lime kiln suspension cylinder also exists above-mentioned all inconvenience and problem.
Summary of the invention
Object of the present invention, is to propose the constructional method that a kind of prefabricated apparatus for baking evaporation mould material moisture builds the Mialz lime kiln suspension cylinder of magnesia brick again by laying bricks or stones.
For achieving the above object, technical solution of the present invention is:
A constructional method for Mialz lime kiln suspension cylinder, is characterized in that comprising the following steps:
A, prefabricated apparatus for baking, comprise following steps:
(1) according to the design paper of Mialz lime kiln suspension cylinder, prefabricated some apparatus for baking, apparatus for baking adopts band steel (1) to make frame and makes rectangle apparatus for baking framework, and the bottom of apparatus for baking arranges supportive structure to carry insulating brick;
(2) in each band steel framework, put into some diatomite insulating bricks, after insulating brick is put into, insulating brick is slotted, and reserved connection hole; According to the diameter of resistance wire, width and the degree of depth of fluting determine that, with embedded resistor silk, connection hole stays the position of resistance wire termination, but face of will keeping away contacts with band steel;
(3) provide two nichrome wire, its power is 2.5kw, 3kw, and nichrome wire is placed in diatomite insulating brick groove;
B, install casting mold and suspension cylinder mould material construction
Install casting mold according to the design paper of Mialz lime kiln suspension cylinder and carry out the construction of each suspension cylinder mould material by code requirement; According to 90 ° of calibration, each suspension cylinder arranges 4 internal temperature sensors (13), the temperature of suspension cylinder mould material inside during to detect baking;
C, remove mould and prefabricated apparatus for baking is placed in mould material bottom
After removing mould, prefabricated apparatus for baking is placed in suspension cylinder mould material bottom, between apparatus for baking surface and suspension cylinder mould material surface in a distance, place steadily and after connecting circuit, with lagging material, mould material is closed, and lead to center-aisle place in each suspension cylinder outside 1 external temperature sensor (14) is set to measure mould material outside temperature; By detecting the temperature of the inside and outside environment of mould material, control its internal-external temperature difference; Provision for thermal insulation during baking mould material is for set up Steel Pipe Scaffold in mould material bottom, thermal baffle is laid on scaffolding top, again apparatus for baking is placed on thermal baffle, the both sides of mould material also adopt thermal baffle stacked, by the space shutoff of both sides, reduce the heat exchange between mould material bake region and external region;
D, access PLC automatic control system toasting
Main cables access PLC control system, a point cable is pulled out by PLC control system, 2.5kw resistance wire on each apparatus for baking also links a point of cable, carry out unifying to control, same 3kw resistance wire is also linked another root and is divided cable to carry out unifying controlling, and a point cable for 2.5kw and 3kw resistance wire is then controlled respectively by PLC control system;
Building by laying bricks or stones of e, magnesia brick
Mould material baking terminates rear dismounting and closes lagging material used, disconnect circuit, removes roaster, carries out building by laying bricks or stones of mould material top magnesia brick, complete the construction of Mialz lime kiln suspension cylinder after cleaning.
The constructional method of Mialz lime kiln suspension cylinder of the present invention can also be further achieved by the following technical measures.
Aforesaid method, wherein said two nichrome wire independently control to be switched on or switched off separately.
The constructional method of Mialz lime kiln suspension cylinder of the present invention can also be further achieved by the following technical measures.
Aforesaid method, wherein said two nichrome wire for being switched in alternation, or are energized simultaneously.
Aforesaid method, the distance between wherein said apparatus for baking surface and suspension cylinder mould material surface is 200-250mm.
After adopting technique scheme, the constructional method of Mialz lime kiln suspension cylinder of the present invention has the following advantages:
1, construction procedure is reasonable in design, simple to operate;
2, greatly improve the quality of Mialz lime kiln suspension cylinder, reduce repair rate, improve service life of kiln body;
3, from long-term effect, larger long-term gain can be obtained with less cost, for whole production process creates benefit, win competitive power.
Accompanying drawing explanation
Fig. 1 is the apparatus for baking structural representation of the embodiment of the present invention;
The closed provision for thermal insulation schematic diagram taked when Fig. 2 is the baking of the embodiment of the present invention;
Fig. 3 is that schematic diagram arranged by the suspension cylinder temperature sensor of the embodiment of the present invention;
Fig. 4 is the drying out curve figure of the embodiment of the present invention.
In figure: 1 band steel, 2 diatomite insulating bricks, 3 first nichrome wire, 4 second nichrome wire, 5 Low Cement Castable, 6 lagging materials, 7 platforms, 8 pillar stiffeners, 9 insulating bricks, 10 nichrome wire, 11 suspension cylinders, 12 center-aisles, 13 internal temperature sensors, 14 external temperature sensors.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is illustrated further.
Embodiment 1
The constructional method of Mialz lime kiln suspension cylinder of the present invention comprises the following steps:
A, prefabricated apparatus for baking, comprise following steps:
Now refer to Fig. 1, Fig. 1 is the apparatus for baking structural representation of the embodiment of the present invention.
(1) according to the prefabricated some apparatus for baking of the design paper of Mialz lime kiln suspension cylinder, as shown in the figure, described apparatus for baking adopts the band steel 1 of 30*3mm to make the frame of apparatus for baking, supportive structure being set bottom frame for carrying insulating brick, after frame makes, forming rectangle band steel frame 500*372mm area;
(2) in each band steel frame, put into the diatomite insulating brick of 6 pieces of 230*114*64mm, after insulating brick is put into, by three-back-shaped layout fluting on insulating brick, and reserved connection hole; Fluting width and the degree of depth determine with embedded resistor silk according to the diameter of resistance wire, slot as the square groove of 10mm*10mm, connection hole stays the position of resistance wire termination, but face of will keeping away contacts with band steel;
(3) provide two nichrome wire, its power is 2.5kw, 3kw, nichrome wire is placed in the diatomite insulating brick groove be parallel to each other; Described two nichrome wire independently control to be switched on or switched off separately; Described two nichrome wire for being switched in alternation, or are energized simultaneously.
B, install casting mold and suspension cylinder mould material construction
Install casting mold according to the design paper of Mialz lime kiln suspension cylinder and carry out the construction of each suspension cylinder mould material by code requirement; According to 90 ° of calibration, each suspension cylinder arranges 4 internal temperature sensors (13), the temperature of suspension cylinder mould material inside during to detect baking;
C, remove mould and prefabricated apparatus for baking is placed in mould material bottom
After removing mould, prefabricated apparatus for baking is placed in suspension cylinder mould material bottom, be apart 250mm between apparatus for baking surface and suspension cylinder mould material surface, place steadily and after connecting circuit, with lagging material, mould material is closed, and lead to center-aisle place in each suspension cylinder outside 1 external temperature sensor 14 is set to measure mould material outside temperature; By detecting the temperature of the inside and outside environment of mould material, the control of internal-external temperature difference can be carried out; Provision for thermal insulation during baking mould material, Steel Pipe Scaffold is set up in mould material bottom, thermal baffle is laid on scaffolding top, again roaster is placed on thermal baffle, keep the upper surface of roaster and the spacing 200mm-250mm of mould material lower surface, the both sides of mould material also adopt thermal baffle stacked, by the space shutoff of both sides, reduce the heat exchange between mould material bake region and external region;
D, access PLC automatic control system toasting
Main cables access PLC control system, a point cable is pulled out by PLC control system, 2.5kw resistance wire on each roaster also links a point of cable, carry out unifying to control, same 3kw resistance wire is also linked another root and is divided cable to carry out unifying controlling, and a point cable for 2.5kw and 3kw resistance wire is then controlled respectively by PLC control system.After circuit communication, access PLC automatic control system, input temp sequence of control; Two resistance wires can alternate energisation, also can be energized simultaneously, complete whole bake process as requested, the thinking controlled is if storing temperature is higher than design temperature, stop heating by PLC system breaking circuits, if temperature is lower than design temperature, then connects circuit and continue heating, 2.5kw and 3kw two control circuits can independent role, also can interact.Carry out according to baking curve given in advance during baking, the data of its inner and outside temperature are input on its external indicating meter by sensor, and the data transactions PLC according to display controls;
Building by laying bricks or stones of e, magnesia brick
Mould material baking terminates rear dismounting and closes lagging material used, disconnect circuit, removes roaster, carries out building by laying bricks or stones of mould material top magnesia brick, complete the construction of Mialz lime kiln suspension cylinder after cleaning.
The present invention has substantive distinguishing features and significant technical progress, and the constructional method construction process of Mialz lime kiln suspension cylinder of the present invention is simple, greatly improves the integral construction quality of suspension cylinder.Improve the efficiency in whole production process, decrease repair rate.From long-term effect, larger long-term gain can be obtained with less cost, for whole production process creates benefit, win competitive power.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or change.Therefore, all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.

Claims (4)

1. a constructional method for Mialz lime kiln suspension cylinder, is characterized in that comprising the following steps:
A, prefabricated apparatus for baking, comprise following steps:
(1) according to the design paper of Mialz lime kiln suspension cylinder, prefabricated some apparatus for baking, apparatus for baking adopts band steel (1) to make frame and makes rectangle apparatus for baking framework, and the bottom of apparatus for baking arranges supportive structure to carry insulating brick;
(2) in each band steel framework, put into some diatomite insulating bricks, after insulating brick is put into, insulating brick is slotted, and reserved connection hole; According to the diameter of resistance wire, width and the degree of depth of fluting determine that, with embedded resistor silk, connection hole stays the position of resistance wire termination, but face of will keeping away contacts with band steel;
(3) provide two nichrome wire, its power is 2.5kw, 3kw, and nichrome wire is placed in diatomite insulating brick groove;
B, install casting mold and suspension cylinder mould material construction
Install casting mold according to the design paper of Mialz lime kiln suspension cylinder and carry out the construction of each suspension cylinder mould material by code requirement; According to 90 ° of calibration, each suspension cylinder arranges 4 internal temperature sensors (13), the temperature of suspension cylinder mould material inside during to detect baking;
C, remove mould and prefabricated apparatus for baking is placed in mould material bottom
After removing mould, prefabricated apparatus for baking is placed in suspension cylinder mould material bottom, between apparatus for baking surface and suspension cylinder mould material surface in a distance, place steadily and after connecting circuit, with lagging material, mould material is closed, and lead to center-aisle place in each suspension cylinder outside 1 external temperature sensor (14) is set to measure mould material outside temperature; By detecting the temperature of the inside and outside environment of mould material, control its internal-external temperature difference; Provision for thermal insulation during baking mould material is for set up Steel Pipe Scaffold in mould material bottom, thermal baffle is laid on scaffolding top, again apparatus for baking is placed on thermal baffle, the both sides of mould material also adopt thermal baffle stacked, by the space shutoff of both sides, reduce the heat exchange between mould material bake region and external region;
D, access PLC automatic control system toasting
Main cables access PLC control system, a point cable is pulled out by PLC control system, 2.5kw resistance wire on each apparatus for baking also links a point of cable, carry out unifying to control, same 3kw resistance wire is also linked another root and is divided cable to carry out unifying controlling, and a point cable for 2.5kw and 3kw resistance wire is then controlled respectively by PLC control system;
Building by laying bricks or stones of e, magnesia brick
Mould material baking terminates rear dismounting and closes lagging material used, disconnect circuit, removes roaster, carries out building by laying bricks or stones of mould material top magnesia brick, complete the construction of Mialz lime kiln suspension cylinder after cleaning.
2. the constructional method of Mialz lime kiln suspension cylinder as claimed in claim 1, is characterized in that, described two nichrome wire independently control to be switched on or switched off separately.
3. the constructional method of Mialz lime kiln suspension cylinder as claimed in claim 1, it is characterized in that, described two nichrome wire for being switched in alternation, or are energized simultaneously.
4. the constructional method of Mialz lime kiln suspension cylinder as claimed in claim 1, is characterized in that, the distance between described apparatus for baking surface and suspension cylinder mould material surface is 200-250mm.
CN201310609678.5A 2013-11-27 2013-11-27 A kind of construction method of Mialz lime kiln suspension cylinder Active CN104671677B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111271977A (en) * 2020-02-11 2020-06-12 包头钢铁(集团)有限责任公司 Repair method for prefabricated module at bottom of suspension cylinder of Maerz lime kiln

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201553701U (en) * 2009-11-16 2010-08-18 中冶焦耐(大连)工程技术有限公司 Coke dry quenching oven housing with novel structure
CN103307882A (en) * 2013-06-03 2013-09-18 广西华锐钢铁工程设计咨询有限责任公司 Maerz kiln suspension cylinder liner body

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN201553701U (en) * 2009-11-16 2010-08-18 中冶焦耐(大连)工程技术有限公司 Coke dry quenching oven housing with novel structure
CN103307882A (en) * 2013-06-03 2013-09-18 广西华锐钢铁工程设计咨询有限责任公司 Maerz kiln suspension cylinder liner body

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111271977A (en) * 2020-02-11 2020-06-12 包头钢铁(集团)有限责任公司 Repair method for prefabricated module at bottom of suspension cylinder of Maerz lime kiln
CN111271977B (en) * 2020-02-11 2021-11-19 包头钢铁(集团)有限责任公司 Repair method for prefabricated module at bottom of suspension cylinder of Maerz lime kiln

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