DE6730C - Process for the preparation of briquettes using a mixture of magnesia-chloromagnesium as a binder - Google Patents

Description

1879.

PATENT LETTERING

...Great.

■■ · ,, i / T'TVt /

AD. GURLT in BONN.

Process for the preparation of briquettes using a mixture of magnesia

and chlorine magnesium as a binder.

Patented in the German Empire on February 14, 1879.

In the manufacture of artificial fuel, which has the purpose of otherwise worthless waste, such as coals and coal dust, a valuable and useful product, The so-called coal stones or briquettes, made in solid pieces, are used hitherto partly organic binders, which burn with the coal, partly inorganic, which remain in the ashes after burning.

The binders of the first type include, in particular, coal tar, coal pitch, natural asphalt, starch paste made from potatoes or cereal flour and so on, to the latter Clay, loam, lime, alum with lime, water glass with clay and so on. These binders or In certain proportions, cold or warm, putties are mixed with the coal and then mostly under vigorous pressing with significant pressure to form blocks of various kinds Form pressed together.

The use of organic putties is particularly difficult because of their high price. although as such they do not affect the calorific value of the product. Against the so far The inorganic cement used, on the other hand, is partly due to its high price, partly to its own low binding force, which is why they must be added in so great a quantity that thereby the ash content of the product is substantially increased and its calorific value is significant is affected.

My method now consists in the use of an inexpensive, inorganic binder of very great binding power, namely of magnesia cement, from 1 part by weight up to 20 parts by weight of other substances can cement together into solid and hard blocks, that can withstand a pressure of more than 500 kg on a square centimeter of area without to break. Therefore, the carbon stones made according to my method are particularly suitable, to endure long transport by land and sea. Furthermore, the because of the great binding power of the magnesia cement, the increase in the ashes is very significant, and therefore very significant the impairment of the heating power is very low. The magnesia putty is prepared from a Solution of chlorine magnesium from 20 to 35 ° Baume ", which is annealed with white glow heat Magnesia in powder form, obtained partly from magnesite, partly from dry chlorine magnesium, is mixed in such a quantity that a plastic cement is formed, which depending on the The temperature and concentration hardened faster or slower, probably by doing so forms a basic chlorine magnesium hydrate. The magnesia putty is then made with coal in a drum or in another suitable way mixed cold or warm, so that, depending on the nature of the charcoal, the mass is from 5 to 10 pCt. Contains putty. The basic principle is that with very lean coal and cold mix the amount of binding agent larger, with baking coal and prior heating of the same up to the beginning the tar formation is taken smaller. The mixture obtained in this way can then by hand how ordinary bricks are shaped. But the coal stones become very firm if required, it must be pressed into molds under a powerful press, as it is today happens with other methods of briquette production.

Claims (1)

Patent claim: The use of magnesia putty for the production of artificial fuel as putty or binding agent to hold the coal particles firmly together, indifferent, whether the production is cold or warm, with or without pressing.