DE6078C - Method and furnace for cleaning iron - Google Patents

Description

PATENT LETTERING

Class 18.

O. HELMHOLTZ in BOCHUM. Method and oven for cleaning ice

Patented in the German Empire on March 5, 1878.

My basic principle is the following:

A constant, slow, thin stream of liquid pig iron is carried towards and below a similar stream, consisting predominantly of iron oxides, which we shall call the slag stream for abbreviation. In the beginning of his way he applies the entgegenfliefsenden him _north there already sour become slag stream silicon from strikes in the continuation of its path younger parts of the slag stream which, therefore, because its origin closer even less decomposed to iron oxides rich and basic, gives to this drains off the phosphorus as acid and flows off in a purified state, while the slag stream, which has become more acidic, empties at the opposite end, at the beginning of the iron stream.

So I want to work continuously with the application of the principle of the countercurrent.

Since there are operating conditions in which the coal begins to escape sooner than the Purification from phosphorus is finished, and the obvious means, this by adding To prevent manganese from becoming costly, I would prefer a second to this end Funds added. For I leave the stream of pig iron on one part of its way a base formed from coal instead of iron oxides flow.

In this way I reach in cases where a freshness is to be feared, or where a highly carbonized one Product is desired (e.g. in the manufacture of pig iron that is as low in silicon as possible for the production of tempered, malleable cast iron), that the hot metal stream during the operation picks up coal from below, while it goes up to the slag stream Silicon, phosphorus or even carbon emits.

If one wishes to obtain a product poorer in coal (e.g. for the Martin or Puddel process), the molten iron is allowed to flow over shorter parts of its way over coal, and over longer parts over stream channel parts containing iron oxide.
"\ The embodiment of the process performed by a either provided with ordinary grate furnace or gas-fired reverberatory furnace, as shown on the drawings. The iron fliefst through the opening a \ Journal III, in the oven and passes through the same serpentine manner in channels, which by Dams or cribs placed on the hearth are formed up to the opposite end, where it flows under a pond b ^x . The slag also flows after it has been brought into the furnace through the opening c ¹ and the channels in the opposite direction as that Eisen has passed through the attack i ¹ again.

The constant stream of pig iron is obtained by either not closing the tap hole in the melting furnace (blast furnace, cupola furnace, flame furnace, etc.), but leaving it open, and the molten iron flows off together with slag, which the latter then immediately again through the slag hole e ' drains back, or that instead of the usual tap hole a pool, similar to the one indicated in the drawing, is made, under which the iron flows away, while the slag also continuously flows off via an overflow.

("The base of the stove consists of cast iron plates, which are cooled from below by air can be, and on which the cribs stand, between which the soil material of the Ore base, or at other places on the coal base (mainly coke dust with baking Coal, lime and clay) initially pulped and burned in, then during the Operation is renewed again and again by re-feeding.

The cribs, ponds, as well as all those parts which melt away too quickly can be exposed in a manner similar to that used in puddling ovens, by means of water and air to be cooled J

In order to maintain the operation continuirlich, it is necessary, one or more channels behufs repair when the ground continued eaten too low, or if _one% as mentioned earlier, will have more Erzlänge instead of carbon length as a base of the grooves to turn off. For this purpose, work doors are made on each side of the furnace and in front of each channel and under them a tap hole. If, for example, the gutter / ', sheet I, is to be repaired, then at / z ¹ part of the dam is broken and at the other end at h '

extended, as well as the two transverse dams i ^l and k 'listed. The liquid iron and slag can then be removed through the tapping hole under the door, and the channel can then be repaired without interrupting the continuous flow. Thus the extremest gutters can be cleaned, it is necessary, that, like drawing angiebt, ί both pools for Abfliefsen of iron and the overlying influence of slag, and the overflow for the abfliefsende slag and the overlying the iron on the on the other side of the furnace. These second openings are usually blocked and only come into effect when the outermost grooves are to be repaired, y.

Even the cribs are not all lined with iron stone. The slow stream of slag is formed for the most part by melting off the lining mass, as required but also molten oxides are caused by those located above the drainage puddle of the iron Inlet opening supplied.

The cribs at the end of the iron stream are made with the purest iron oxides Lined materials. These are lined up with those that are less pure, these Oxides-containing materials, and lastly there are cribs, which are essentially lime-based to be fed. The slag stream thus has the highest content of at its beginning Iron oxides, takes phosphoric acid first, then silicic acid and last Lime on.

The use of manganese-containing pig iron or oxides etc. is not excluded, it just should not be used in quantities necessary, as is the case with other modes of manipulation. Manganese-containing Pig iron can be introduced in liquid form or for gradual melting individual cribs are placed.

The iron purified in the manner described above can either be poured directly into coquilling. poured or collected in a preheated container,

Claims (4)

Patent Claims: 1. A furnace with zigzag grooves; in which in opposite Direction a stream of pig iron and a stream of slag for the purpose of liberation of the former of phosphorus and silicon are superimposed. 2. Production and maintenance of a slag stream within the flame furnace described, which: a) locally, d. H. chemically varied at different points of its course, b) remains constant at the individual points, c) does not just form an inlet or outlet, but as a chemical factor Serves reactions which are continuously different along its course, d) arises from slag and is obtained by melting the always again and in different places with chemically different materials (coal, iron oxide holding material, lime and other alkaline soils) lined banks. Not the individual under a), b), c), d) listed properties are to be regarded as new, but the current gifted with all these qualities at the same time. 3. Use of cribs in the metal bath and production of a long stream channel from such cribs, which either come from the reagents themselves or from them with them consistently cooled core. 4. Elimination of individual parts of the gutter for re-lining, especially the floor, through the application of perishable insulating masses. In addition 3 sheets of drawings.