DE1052119B - Binder for the briquetting of crushed, damp or moistened ores, fuels or fuel-ore mixtures - Google Patents

Description

GERMAN

The patent 1 003 452 describes the use of the binder dispersion prepared according to patent 957 753 for briquetting moist or moistened, crushed ores on their own or in combination proposed with fuels. The patent 957 753 proposes a method of making a Binder for the briquetting of shredded, moist or moistened fuels, the is characterized by the fact that hot coal tar pitches with the addition of clay-like substances (except Bentonite), water and at least 0.5%, preferably 1 to 4%, of solid aromatic compounds be converted into a dispersion with a maximum of three rings.

Coal tar pitch has already been proposed, but it does not belong to the state of the art by other aromatic pitches, in particular by washing oil pitch or by lignite tar pitch, partially or entirely to replace. It was also possible to establish that with the cyclical connections with a maximum of three rings in the dispersion up to 4CWo of the pitch content can be passed. A higher addition of cyclic compounds offers the advantage that expensive pitch is saved and the total amount in dispersion can be reduced. In addition, the mass is even easier to process, because it is more pliable, which makes it easier to mix and disperse with the raw materials will. The addition of sulphite waste liquor is also recommended in some cases.

According to the invention it was found that some of the aromatic pitches in the dispersion through Hard pitch distillate and / or redistillate can be replaced. In addition to or instead of hard pitch distillate and / or redistillate can also contain other bituminous substances such as bitumen, asphaltite, vegetable pitch or of animal origin and the like.

In general, the distillation of coke oven or gasworks coal tar is carried out to the extent that that this is a pitch with a softening point of 60 to 75 ° C according to K.-S. remains, the so-called Briquette pitch. The highest-boiling distillate oils that arise here are the anthracenols. In some cases the vacuum distillation of this briquette pitch is driven even further, with the residue in the +5 Distillation still a hard pitch with a softening point of 135 to 140 ° C according to K.-S. remains, while the distillate is a distillate oil that solidifies in the air to a resin-like soft product, the Hard pitch distillate. This hard pitch distillate has z. B. the following properties:

Softening point according to K.-S 17 ° C

Start of boiling 380 ° C

Binder for the briquetting of crushed, moist

or moistened ores, fuels or fuel-ore mixtures

Addition to additional patent 1 003 452

Applicant:

Gels enkirchener

Mining company,

Essen, Rosastr. 2

Dipl.-Ing. Franz Eisenhut, Wanne-Eickel,

Dipl.-Ing. Viktor Gobiet, Ahlenberg via Dortmund, and Dr. rer. nat. Adolf Siegl, Wanne-Eickel, have been named as inventors

Passed distillate

up to 400 ° C 2.0 «/»

up to 420 ° C 17.0%

Free carbon 0.68%

In contrast, the redistillate is created when hard pitch is coked. That in the course of coking Distillate obtained in an amount of about 15% is usually completely converted into the so-called with inert gas Blow secondary pitch and as such fed back to the coking process. In this fading process the redistillate is obtained from secondary pitch in a yield of about 50%. the A sample of such a redistillate showed the following key figures:

Softening point according to K.-S 15 ° C

Start of boiling 380 ° C

Passed distillate

up to 400 ° C 9.0%

up to 420 ° C 19.0%

Free carbon 0.58%

The amounts of hard pitch or redistillate additives that can be used is determined by experiments easy to determine. In general, this addition ranges between 2 and 15%. When using of bitumen in addition to or instead of hard pitch or Redistillate is also usually used here

809 768/438

Claims (5)

do not exceed 15% of the pitch content of the dispersion, otherwise the mass can become crumbly and unusable. The use of these additives has economic advantages. Example 1 90 parts by weight of fine iron ores were mixed with 10 parts by weight of a dispersion consisting of 29.5 ° / »soft pitch, softening point 40 ° C according to K.-S., 10.0 ° /» hard pitch distillate, 19.0% kaolin and 41 , 5% water mixed intimately. Water content of the mixture 9%. After shaping and evaporation of the water, standard-compliant, weatherproof briquettes were produced for smelting. Example 2 92 parts by weight of gravel burns were intimately mixed with 8 parts by weight of a dispersion of 20.0% soft pitch, softening point 40 ° C. according to K.-S., 19.5% hard pitch distillate, 19.0% kaolin and 41.5% water. Water content of the mixture 6%. After briquetting, the shaped bodies can be fed to a roasting oven while they are still moist. Example 3 Compared to Example 1, 5% of the 10% hard pitch distillate was replaced by B 300 bitumen. Here, too, the properties of the briquettes did not change. Equally good results were achieved when redistillate was used instead of hard pitch distillate. It was further found that when the materials to be briquetted were heated, the amount of dispersion could be reduced. Patent claims: 1. Binder for the briquetting of crushed moist or moistened ores or fuel-ore mixtures or for briquetting fuels, characterized in, ίο that some of the pitch of the dispersion through Hard pitch distillate and / or redistillate is replaced (addendum to patent 1 003 452). 2. Binder according to claim 1, characterized in that in addition to or in place of hard pitch distillate and / or redistillate as well as other bituminous substances such as bitumen, asphaltite, pitch of vegetable or animal origin and the like are used in the dispersion. 3. Binder according to claim 1 or 2, characterized in that the total amount of cyclic Compounds such as anthracene, raw anthracene, naphthalene, raw naphthalene, phenanthrene, Raw phenanthrene, individually or mixed in the dispersion, amounts to up to 40% of the pitch content. 4. Binder according to one of claims 1 to 3, characterized in that the proportion of hard pitch distillate, Redistillate, bitumen, asphaltites and the like in the pitch portion of the dispersion individually or mixed is from 2 to about 15%. 5. Use of the binder according to any one of claims 1 to 4 in such a way that the dispersion is added to the substances to be briquetted and heated before or after this addition.