Scrap steel preheating system

Abstract

The invention relates to a scrap steel preheating system. The scrap steel preheating system comprises a kiln, a conveying device, a mounting bracket, a steel pushing mechanism and a burner. The kiln is fixed on the mounting frame through fasteners, and the burner is installed on the kiln and used for preheating scrap steel. The left end of the kiln is an openable and closable discharging port, theright end of the kiln is a steel pushing port, the opening and closing of the steel pushing port is controlled by the steel pushing mechanism, and an openable and closable feeding port is formed in the side surface of the kiln. The conveying device is used for putting the scrap steel into the kiln from the feeding port. The steel pushing mechanism is fixed on the mounting bracket, does reciprocating linear motion and is used for pushing the preheated scrap steel out of the kiln. According to the scrap steel preheating system, the scrap steel is directly preheated by the kiln, the preheated scrap steel is pushed out by a steel pushing machine, the time in taking out the scrap steel from the kiln is shortened greatly by the adoption of the steel pushing machine, the time is counted in seconds, and thus continuous preheating of the scrap steel is realized.

Description

technical field [0001] The invention relates to a system for preheating scrap steel, in particular to a continuous scrap steel preheating system. Background technique [0002] According to data from the World Steel Association, global steel production in 2017 was 1.6912 billion tons, a year-on-year increase of 5.3%. Asia’s annual crude steel production reached 1.1625 billion tons, a year-on-year increase of 5.4%. India’s crude steel production was 101.4 million tons, a year-on-year increase of 6.2%. , South Korea's crude steel production was 71.1 million tons, a year-on-year increase of 3.7%; the total crude steel production in the EU region (28 countries) was 168.7 million tons, a year-on-year increase of 4.1%; the total crude steel production in North America in 2017 was 116 million tons tons, a year-on-year increase of 4.8%. The World Steel Association predicts that global steel demand will increase again by 1.6% to 1.72 billion tons in 2018, and global steel demand will...

AI Technical Summary

Problems solved by technology

After preheating, the container needs to be hoisted out before the next round of preheating. During this period, the interval is long and the heat loss is large, so the preheating efficiency is low.

[0007] (2) The container is heated for a long time, which is prone to deformation and rupture. Some sites weld the water cooling system outside the container. However, the weld seam is easy to open due to heat, causing water leakage problems, and the working environment of constant alternating cold and heat has a negative impact on the container and the water cooling system itself. The processing technology puts forward higher requirements

[0008] (3) The scrap steel is preheated through the container, and the heating is uneven, so the preheating efficiency is low; at the same time, the container absorbs heat, which reduces the utilization rate of heat energy

[0009] (4) The kiln used for preheating usually adopts a steel structure outer frame with built-in fibers, refractory bricks, and castables. The heated container is placed on the water beam in the furnace, and the container and the scrap steel contained in it are uniform There is no direct contact with the furnace wall and furnace bottom, so it is difficult to meet the preheating requirements

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