DE670539C - Process for operating foundry shaft furnaces - Google Patents

Description

Procedure for operating foundry shaft furnaces When operating foundry shaft furnaces the inconvenience makes itself: extremely unpleasant noticeable that the on the filler coke abandoned first set of iron according to its weight and according to its proportion large drop height crushed the filling coke relatively heavily. This evil has a disastrous effect especially when the filler coke itself is low Has strength and if it is a shaft furnace with a larger diameter, where the weight of the iron set is great. Too relatively small pieces Smashed fill looks do not develop enough heat to reach the temperature of the first Bring iron set to the required height, so that the first tap as a result Due to its low internal temperature, it can often not be turned into usable castings is. For the operation of foundry shaft furnaces with Saar coke or with similar inferior coke Coke of low strength has already been proposed to use the coke as possible large pieces and by digging up the iron set in two to three parts To smash the coke pieces as little as possible. Especially with larger ovens which the first set of iron falls a considerable height to the filling coke, However, these measures are by no means sufficient to prevent the filler coke from being broken up to protect.

In an effort to remedy this in an effective manner, will proposed according to the method according to the present invention, between the Filling coke and the iron set on top of it honor buffer, preferably from Shavings, wool or the like yielding bnv. resilient material.

The preferably generous or resilient, at the appropriate height layered buffers on top of the filler coke soften the impact when the first is brought in Iron set, so that a smashing of the filler coke in excellent Way is prevented.

For example, wood shavings, wood wool, Mineral wool or similar combustible or fusible substances are used.

A particularly advantageous and inexpensive embodiment of the new However, the method is that the resilient buffer made of iron filings, and in particular made of steel wool or the like with a large surface area and a small cross-section carbon, poor iron, especially since the addition of steel in a manner known per se Increased melt temperature.

Such a resilient buffer made of bulky steel chips, steel wool @O. The like. If necessary, it already remains when it is introduced into the shaft of the furnace in this hang and go under the effect of the weight of the bursting iron set relatively slow, the fall effect of the iron set is resiliently decelerating down the filling coke.

Also in those cases, in which to - .. supplement the filling coke in the course of the furnace drive with the set coke another filling, @ ksmeaige is given up, it is recommended to use this amount of additional filler coke according to the present invention apply a resilient buffer, preferably made of steel chips or steel soles, also do here to keep the coke as coarse as possible.

Claims (1)

PATENT CLAIM: A method for operating foundry shaft furnaces, characterized in that a buffer, 7.B. made of shavings, wool or flexible or resilient material, the buffer layer being made of combustible or fusible material, such as wood shavings, wood wool, mineral wool @o. Like., Moder but can also consist of large-surface and low-cross-section carbon, poor iron axes, such. B. iron filings, or is advantageously formed from steel wool.