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Expansion method for plate blank heat-preserving pit

A heat preservation pit and slab technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of long period, high construction cost, and large losses

Inactive Publication Date: 2012-09-19
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned construction method has the disadvantages of high construction cost, long period, and large losses caused by production stoppage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] (1) Preparation of spare parts and preparation of materials:

[0022] 1. According to the expansion and reconstruction design of the existing 1#-6# heat preservation pit, prepare the required burners, valves, M20×300 anchor bolts, wall panels, support seats, brackets, needles and M16×70 Bolts, M16 nuts, washers 16 and other spare parts.

[0023] 2. According to the expansion and reconstruction design of the existing insulation pit, prepare the materials needed to be purchased, and select lightweight castables, fiber blanket folding blocks, heat-insulating fiberboards, clay bricks, high-temperature cement, PA-80 high-temperature-resistant glue, and burner bricks , and ready to go.

[0024] 3. Prepare steel plates, I-beams, and channel steel connectors for the insulation pit equipment body and the insulation cover to connect the steel structure in advance.

[0025] 4. The wall panel is cast steel, and the fixing bolt holes need to be machined.

[0026] 5. The support s...

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Abstract

The invention discloses an expansion method for a plate blank heat-preserving pit, belonging to a production facility used in a metallurgical production enterprise. The expansion method comprises the following steps of: removing a refractory material on the end part of an original heat-preserving pit body at an extension end, cutting and removing an end part steel structure, and paving civil engineering concrete at the prolonged foundation position of an original heat-preserving pit to obtain a new large bottom plate; arranging a new side wall steel structure on the new large bottom plate; building a heat-preserving pit refractory material; lengthening in the length direction of an original heat preserving cover in a balanced way; and arranging a valve at the branch pipeline coal gas inflow end position of a coal gas pipeline, removing an original burner at an opposite position simultaneously, and arranging a new burner. According to the method, the investment cost on the refitting ofone pit is 150,000 yuan, the refitting period lasts for 10 days, the idling period lasts for 10 days in total, and direct economic benefit of over 1,050,000 yuan / pit can be brought.

Description

technical field [0001] The invention belongs to production facilities of metallurgical production enterprises, and is mainly used for rolling steel heat preservation, in particular to a method for expanding the capacity of a slab heat preservation pit. Background technique [0002] The slab insulation pit of the 1549 production line has a maximum length of 8.7m and a designed maximum unit weight of 16t. With the needs of the market, the maximum length of the slab heated by the heating furnace has reached 10.5m, and the maximum unit weight has been increased to 20.6t. Due to the limitation of the heat preservation pit in the 1549 production line, the red slab with a length of more than 8.7m was sent to the site. Because there was no matching heat preservation pit, the red steel was forced to fall to the ground and placed in the open air. The temperature of the red slab placed in the open air drops rapidly, causing the heat energy of the slab to be wasted in vain. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/70
Inventor 杨福瑞
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD