SU1292909A1 - Casting and rolling unit - Google Patents

Abstract

The invention relates to combined processes for the continuous casting of billets and rolling ingots cut from them. The aim of the invention is to reduce heat losses. Lee; The rolling mill contains a series of multi-continuous continuous casting, heating furnaces (NP) and a rolling mill. Cut ingots from the billets are inspected. Valid ingots are moved directly into NP, and defective ingots are transferred to the selective stripping line and then also to NP. The location of the selective stripping line outside the loading line in the NP allows to reduce heat losses when loading suitable ingots. 1 il. g ICO 1C: about

Description

The invention relates to a combined process of casting and hot rolling steel strips and can be used in sheet rolling.

The purpose of the invention is to reduce heat loss.

The drawing shows a diagram of the unit.

The casting-rolling unit contains multi-strand continuous casting machines 1 arranged in a technological sequence, flaw detectors 2 surfaces of hot ingots located on outlet roller tables 3, devices 4 for transporting cut hot ingots, racks 5 for accumulating suitable hot ingots, as well as racks 6 for accumulating hot ingots with defects on the surface, rolling table-trolley 7 for transporting ingots, line 8 for selectively stripping them, preheating furnaces 9 with lines loading and unloading, a hot rolling broadband mill 10, cold ingot loading device 11 and ingots 12. A line 8 for selectively clearing contains horizontally rotary tables 13, automated machines 14 for selectively cleaning the surface, a device 15 for accumulating stripped ingots.

Devices and parts of the unit soy

Dinenov live rolls 16 and 17.

Casting and rolling unit operates as follows.

Buckets with liquid steel at approximately equal intervals of time come from converters or electric furnaces to multi-strand machines 1, which are used for casting billets, which are usually carried out simultaneously on several of them.

The cast billets are cut into ingots of the required length with the help of flame cutting machines included in machine 1, and then subjected to automatic surface quality control with the help of flaw detectors 2. Billets cast from molten steel delivered in one ladle form one heat, different from the rest of the heats by chemical composition. Of the total number of 6-10 ingots from each heat, one or two surface defects may be present in the form of three

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five

five

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five

women, captivity, cortical bubbles, etc., which are to be removed before rolling.

After casting, using the device 4, which has tick clamps, suitable ingots accumulate in the feet on the racks 5, and ingots with surface defects accumulate on the racks 6. After the accumulation of the ingots of each heat has been completed, they are further transported further along the process stream of the unit. Initially, ingots that are defective using the device 4 and the rolling table of the maturation 7 are delivered to the selective stripping line 8, and the remaining ingots of this heat, one by one, are delivered to the heating furnaces 9 and loaded into them .

After stripping on line 8, ingots overtake their smelting and are loaded into the preheating furnaces 9 last. The loading of the next melt ingots begins. After heating, the ingots are rolled into steel strips on a rolling mill 10. When switching to rolling new smelting, the rolling mill is rebuilt according to the chemical composition of the smelting and in accordance with the required dimensions of the hot-rolled strips.

The processing of ingots on line 8 is carried out as follows.

Delivered with a live-carriage trolley 7, one-piece ingots are rotated 90 degrees in a horizontal plane and transported to automated machines 14 for selective fire stripping. On each of the machines 14, an automatic quality control of the surface of the wide and narrow faces of the ingot is carried out. The coordinates of the detected defects are memorized by a microprocessor, which controls the device for fire stripping of defects.

Stripped ingots can stay on accumulator 15 for a short time, then rotate 90 ° in the horizontal plane with the second table 13 and enter the loading conveyor 15, after which they overtake their smelting when loaded into preheating furnaces 8. Timely joining of the stripped ingots to their smelting is provided thanks to tracking dvhkkeny katkdogo of them.

The ingots subjected to selective cleaning, at the time of their loading into the preheating furnaces, have an average mass temperature 200-300 ° C lower than their main quantity.

. Due to the proposed placement of the selective sweep line with ingot length of 12 m, the heating furnaces are close to the casting machines by 50-60 m compared to the prototype and suitable ingots (90% of the heat) are heated by 15–20 ° C,

Formula of invention

Casting and rolling unit, containing multi-strand continuous casting machines located in a row, mounted with a carriage for moving along them a trolley for moving cut ingots and preheating furnaces located behind the trolley and rolling mill, loading lines of which are parallel to the stream of continuous casting machines, as well as the selective stripping line, which is characterized by the fact that, in order to reduce heat losses, it is equipped with the fixed prior to the selective stripping line and The loading line of the heating furnaces is rotary tables, and the selective cleaning line is located perpendicular to the loading line of the heating furnaces.

Yu

12

Editor N.Kishtulinets

Compiled by V.Maltsev

Tehred L. Serdyukova; Proofreader A.Ilyin

Order 319/12 Circulation 741 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., A

Claims (1)

Claim A casting and rolling unit containing multi-row continuous continuous casting machines arranged in a row, a trolley arranged to move along them to move the cut ingots and heating furnaces and a rolling mill located behind the trolley, the loading lines of which are parallel to the streams of continuous casting machines, and also a line of selective stripping, about t10 characterized in that, in order to reduce heat loss, it is equipped with installed in front of the line of selective stripping and installed after it before the line of loading 15 heating stoves with rotary tables, and the line of selective cleaning is perpendicular to the line 'loading of heating stoves.