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A method for on-line direct rolling of fine-grained steel from continuous casting billets

A continuous casting billet and fine-grain technology, applied in the field of iron and steel metallurgy, can solve the problems of unstable product quality control, increase production cost, long production process, etc., so as to improve metal yield, save energy, and improve metal yield. Effect

Active Publication Date: 2017-09-01
JIANGSU BINXIN STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned processing method results in long production process, complicated organization, unstable product quality control, and heating up after cooling down to increase production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A method for continuous casting slabs to directly roll fine-grained steel on-line, which is suitable for the production of rods and wires for fine-grained steel. It includes the following steps: the continuous casting billet enters the rolling mill and cools after successively passing through the primary smelting furnace, the continuous casting machine, the insulation roller section A, the reheating furnace, the insulation roller section B, and the soaking furnace; And the conveying temperature on the insulation roller table section B is 900°C, the temperature when entering the repairing furnace is 900°C, the temperature drop is <50°C, and the holding time is 1min; the soaking furnace adopts 1000kW×2, the frequency is 1000Hz, and the intermediate frequency voltage 1000V, the furnace entry temperature is 700°C, and the furnace exit temperature is 900°C; the starting rolling temperature of the rolling mill is 880°C, the intermediate rolling temperature is 850...

Embodiment 2

[0020] Embodiment 2: A method for continuous casting slabs to directly roll fine-grained steel on-line, which is suitable for the production of rods and wires for fine-grained steel. The method comprises the following steps: the continuous casting slab successively passes through the primary smelting furnace, the continuous casting machine, the thermal insulation roller table section A, the reheating furnace, the thermal insulation roller table section B, and the soaking furnace, and then enters the rolling mill and cools; the thermal insulation roller table section The conveying temperature on section A and insulation roller table B is 940°C, the temperature when entering the repairing furnace is 940°C, the temperature drop is <50°C, and the holding time is 1min; the soaking furnace adopts 1000kW×2, the frequency is 1000Hz, The voltage is 1000V, the furnace entry temperature is 700°C, and the furnace exit temperature is 900°C; the starting rolling temperature of the rolling mi...

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PUM

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Abstract

The invention discloses a continuous-casting-billet on-line direct fine-grain steel rolling process technology, and belongs to the technical field of steel metallurgy. The continuous-casting-billet on-line direct fine-grain steel rolling process technology is used for continuous casting billet fine-grain steel rolling and comprises the steps that a continuous casting billet is treated sequentially through a primary smelting furnace, a continuous casting machine, a first heat preservation roller way segment, a concurrent heating furnace, a second heat preservation roller way segment and a soaking pit furnace and then enters a rolling machine to be cooled. By means of the process technology, the continuity degree of continuous-casting-billet fine-grain steel rolling can be increased, a heating furnace is omitted, the energy consumption is reduced greatly, the production cycle of products is shortened, product quality is improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for directly rolling fine-grained steel on-line with continuous casting slabs. Background technique [0002] In the field of iron and steel metallurgy technology, the rolling of fine-grained steel is mainly carried out in the form of continuous casting slab hot delivery, hot charging, or continuous casting slab off-line and then transported to the steel rolling area for re-rolling. However, the above-mentioned processing method results in long production process, complicated organization, unstable product quality control, and heating up after cooling down to increase production costs. Contents of the invention [0003] The object of the present invention is to provide a method for continuous casting slabs to directly roll fine-grained steel on-line, which can improve the continuous degree of rolling fine-grained steels of continuous castin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B21B37/74B21B37/76
CPCB21B1/463B21B37/74B21B37/76
Inventor 刘剑辉董瀚陈禹陈鹰贾志晖叶黎华
Owner JIANGSU BINXIN STEEL GRP