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Production process for hot-rolled acid-free acid pickling low-carbon steel plate

A low-carbon steel plate and production process technology, applied in the field of steel plate production technology, can solve the problems of pollution discharge, incoordination, harsh production environment, etc., and achieve the effect of simplifying the production line, facilitating control, and shortening the process cycle

Inactive Publication Date: 2019-03-26
SICHUAN TIANHONG STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the current goal of vigorously promoting green and environmentally friendly metallurgical production, the chemical pickling and descaling process has become very uncoordinated due to its typical pollution emissions and harsh production environment.

Method used

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  • Production process for hot-rolled acid-free acid pickling low-carbon steel plate
  • Production process for hot-rolled acid-free acid pickling low-carbon steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A production process of hot-rolled acid-free pickling low-carbon steel plate, including the production process of low-carbon steel plate and pickling process, specifically, the pickling process includes: decoiling the flattened steel plate, mechanical grinding pickling, mortar Pickling, crimping process.

[0028] The production process of the low-carbon steel plate includes molten iron pretreatment, converter smelting, out-of-furnace refining, slab continuous casting, walking heating furnace heating, rolling, laminar cooling water cooling, curling and leveling.

[0029] The mortar pickling includes the following steps: mixing water and gravel to form mortar, and projecting the mortar onto the surface of the low-carbon steel plate through a shot blaster, and the included angle between the projecting direction of the mortar and the low-carbon steel plate is 0-45°.

[0030] Preferably, the lateral width of the projection area of ​​the mortar on the low carbon steel plate i...

Embodiment 2

[0054] A production process of hot-rolled acid-free pickling low-carbon steel plate, including the production process and pickling process of low-carbon steel plate, specifically,

[0055] The production process of the low-carbon steel plate includes molten iron pretreatment, converter smelting, out-of-furnace refining, slab continuous casting, walking heating furnace heating, rolling, laminar cooling water cooling, curling and leveling.

[0056] The pickling process includes: uncoiling the flattened steel plate, mechanical grinding pickling, mortar pickling, and curling processes. The mortar pickling includes the following steps: mixing water and gravel to form mortar, and projecting the mortar onto the surface of the low-carbon steel plate through a shot blaster, and the included angle between the projecting direction of the mortar and the low-carbon steel plate is 20°.

[0057] The lateral width of the projection area of ​​the mortar on the low carbon steel plate is greater...

Embodiment 3

[0073] A production process of hot-rolled acid-free pickling low-carbon steel plate, including the production process of low-carbon steel plate and pickling process, specifically, the pickling process includes: decoiling the flattened steel plate, mechanical grinding pickling, mortar Pickling, crimping process.

[0074] The production process of the low-carbon steel plate includes molten iron pretreatment, converter smelting, out-of-furnace refining, slab continuous casting, walking heating furnace heating, rolling, laminar cooling water cooling, curling and leveling.

[0075] The mortar pickling includes the following steps: mixing water and gravel to form mortar, and projecting the mortar onto the surface of the low-carbon steel plate through a shot blaster, and the included angle between the projecting direction of the mortar and the low-carbon steel plate is 45°.

[0076] The lateral width of the projection area of ​​the mortar on the low carbon steel plate is greater than...

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Abstract

The invention relates to a production process for a hot-rolled acid-free acid pickling low-carbon steel plate. The production process for the hot-rolled acid-free acid pickling low-carbon steel platecomprises a low-carbon steel plate production process and an acid pickling process, and is characterized in that the acid picking process comprises the following steps of uncoiling a flattened steel plate, mechanically grinding and acid picking, acid picking mortar, and rolling; and the mortar acid pickling comprises the following steps of mixing water and gravel to obtain mortar, and casting themortar to the surface of the low-carbon steel plate through an impeller head, wherein an included angle between the casting direction of the mortar and the low-carbon steel plate is 0 to 45 degrees. Apure mechanical physical manner instead of a chemical manner is adopted for cleaning, so that no pollution emission is realized, and the operation process is harmless to the environment.

Description

technical field [0001] The invention relates to the technical field of steel plate production technology, in particular to a production process of hot-rolled acid-free pickling low-carbon steel plate. Background technique [0002] The hot-rolled pickled steel plate is processed by the pickling unit after being hot-rolled on the hot rolling mill. Its surface quality and serviceability are intermediate products between hot-rolled and cold-rolled plates. Ideal substitute for rolled steel. Because the surface quality of hot-rolled pickled steel plate is better than that of hot-rolled steel plate, and the production cost is lower than that of cold-rolled steel plate, it is one of the more profitable products for iron and steel enterprises. After the hot-rolled steel plate is rolled and coiled, a layer of hard and brittle iron oxide scale, commonly known as scale, will be formed on the surface. Whether hot-rolled steel sheets are used as raw materials for cold rolling or before ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08B24C1/08
CPCB24C1/086C23G1/08
Inventor 瞿坤
Owner SICHUAN TIANHONG STAINLESS STEEL
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