Heat-exchanging ladle-to-ladle method for producing low-carbon, micro-carbon iron alloy

Abstract

This invention relates to a heat bag exchange method for producing low carbon and micro-carbon Fe alloys including the following steps: 1, connecting the orifices of heat exchange reaction bag A and B used in heat exchange to a connection bag, setting a driving unit driving the connecting bag to rotate around its shaft, 2, inpouring melt ore material being exchanged into bag A with a recovery agent, 3, starting the driving unit to pour all materials in bag A into bag B and pouring the melt materials poured in bag B before hand back to bag A and circulating the steps, 4, finishing the outgoing operation after meeting the requirement of heat exchange of bags, which reduces the exchange time.

Description

technical field [0001] The invention relates to a method for hot mixing and pouring of low-carbon and micro-carbon ferroalloys. Background technique [0002] The existing methods of producing low-carbon and micro-carbon ferroalloys using silicon or silicon-containing alloys as reducing agents are commonly used in electrosilicothermal method, vacuum solid-state decarburization method and thermal conversion method. [0003] The heat conversion method is also called "Bollen method". It is an out-of-furnace production method invented by the Frenchman Bollen in the early 19th century. Its characteristics are: 1. Excessive oxides in the slag react with a small amount of silicon-containing alloys , to obtain a micro-carbon alloy that hardly contains silicon; 2. Excess silicon reacts with oxides to obtain slag that hardly contains oxides, and the ore utilization rate is high. In this method, different electric furnaces are used to smelt liquid silicon alloy (also solid silicon chro...

AI Technical Summary

Problems solved by technology

[0005] First, the repacking time is long

It takes about 10 minutes to perform one heat transfer, and a production operation requires about 10 times of repacking, which takes more than 1 hour in total, and the production efficiency is low.

[0006] Second, poor security

In the process of pouring ladles, it is necessary to use the crane to hang extremely heavy ladles containing high-heat materials at high positions (above 3 meters). When pouring molten mineral materials from one ladle to another, it is necessary to The bottom of the molten iron ladle is hooked manually, and the alignment operation is required when pouring the ladle. Otherwise, the high-heat material will overflow when the ladle is poured. The whole operation process is not only time-consuming, but also highly dangerous. cause a safety accident

In addition, when there is a leak in the operation process (that is, a ladle containing high-heat materials breaks), the processing process is slow and manual processing is required, which will not only cause waste of raw materials, but also a hidden danger to safety

[0007] Third, in order to complete the subcontracting operation, it is necessary to configure large-scale (such as 30-200 tons) lifting equipment, and occupy a large work site, and the investment in fixed assets is large.

[0008] Fourth, the material loss is large, and the product qualification rate is reduced

Due to the difficulty in the operation of reversing the bag by driving a car, it is easy to spill the finished product outside the bag during the reversing process, resulting in material loss

In addition, if the time is too long in the process of repacking, the temperature of the molten slag will drop, the slag will become gelatinous, and the reaction between raw materials will not be sufficient, resulting in large material loss and lower product qualification rate.

[0009] Therefore, there are defects in the above-mentioned existing method of heat exchange and outsourcing, and need to be improved.

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