SU1613433A1 - Binder for coal-wood briquettes - Google Patents

Abstract

This invention relates to the technology of molded carbon materials, in particular to binders for charcoal briquettes that can be used as reducing agents for the metallurgical industry, as well as fuel, and for the production of active carbon. The aim of the invention is to increase the coke residue yield from the binder and the abrasion resistance of pyrolyzed charcoal briquettes. For this, the proposed binder contains the following components, parts by weight: hardwood pyrolyzed resin 100

VAT residue distillation furfural 15-40

sulfuric acid 2-8. 1 hp ff, 1 tab.

Description

This invention relates to a process for the production of molded carbon materials, in particular to a binder for charcoal briquettes that can be used as reducing agents for the metallurgical industry, as well as fuel, and for the production of active carbon.

The aim of the invention is to increase the yield of coke binder residue and abrasion resistance of pyrolyzed wood briquettes.

Wood resin is the most popular and cheap product obtained at the wood-chemical enterprises. The bottoms from the distillation of furfuro are contaminated production waste. It is a black liquid with the smell of furfural, viscosity 1.66 cP. Furfural - raw contains a number of high-boiling components.

among which are products of partial or deep oxidation of furfural with oxygen from the air contained in the feedstock. These include furfural peroxide, furfural hydroperoxide, pyroslycev, formyl acrylic, maleic acid, fumaric, block, tartaric and oxalic acid, as well as colored resinous products resulting from the polymerization or condensation of furfural and products of its oxidation. In the removal of furfural, these impurities are concentrated in the so-called bottoms. Sulfuric acid is selected as a catalyst for the copolymerization of wood resin and bottom residue. You can use any brand of sulfuric acid with a concentration of 93-95%.

The connection is prepared as follows.

SA) b. CO SO

Wood pyrolysis resin is mixed with bottom residue until they are completely mixed and then sulfuric acid is mixed in.

EXAMPLE 1 Binder contains, by weight, including: hardwood pyrolysis resin, bottom distillation from furfural distillation 15, concentrated (93%) sulfuric acid 2. After preparing the binding agent, it is mixed with charcoal. raw fraction 0.25-3.0 mm at a ratio of 40 wt.h. binding on 100 mach. charcoal pressed tiles under a pressure of 50 kg / cm size 200x150x20 mm, kept at 110-120 ° C for 1 h, pyrolyzed at 500 ° C for 40 minutes. Charcoal briquettes are obtained that correspond to the requirements of the carbon reductant for the metallurgical industry.

PRI mme R 2. The binder contains, in parts by weight, the hardwood pyrolysis resin, the vat residue from the distillation of furfural, 27.5; concentrated (93%) sulfuric acid 5. After preparation of the binder, it is mixed with powder (up to 0.25 mm) of charcoal coal at a ratio of 40 mash, binder per 100 mash. coal powder, pressed blocks, incubated at 110-120 ° C for 1 h, pyrolyzed at 500 ° C for 40 minutes. The yield of pyrolysis residue in the molded material from the binder is 37.3%. After cooling, the blocks are crushed, scattered into fractions. The fractions are activated at 830-850 ° C with water vapor to a predetermined amount of 15-35%. Get crushed active carbon, its resistance to abrasion from 72 (about 34.2), up to 84% (14.8% of obgar). The iodine activity of these samples was 68.3 and 89.1%, respectively. The bulk density is 0.42 and 0.36 kg per liter.

PRI me R 3. A binder contains, in terms of weight, py.: A hardwood pyrolysis resin; a vat residue from the distillation of furfural 40; concentrated sulfuric acid 8. Then the binder is mixed with non-fractionated raw charcoal (particle size up to 2.5 mm) at a flow rate of 50 parts by weight, binder per 100 mash. coal, pressed blocks, incubated at 110-120 ° C for 2 h, pyrolyzed at 350-400 ° C. Get nekpotschie fuel briquettes.

The table shows the output of the coke residue from the binder and the characteristics of charcoal briquettes using the proposed eoetava

binder (examples 1-3), for compositions when going beyond the proposed limits (examples 4-5) and for the composition of the prototype (example 6).

Mass fraction of coke residue from

The binder is defined as follows. The binder is prepared, cured at 100–200 ° C for 60–180 minutes, and then pyrolyzed at 800–850 ° C until all gas evolution ceases (40–60 minutes). Share

coke (%) is determined by the total mass of wood resin and the bottom residue. From the data in the table it follows that from the proposed binder composition a higher yield is obtained.

coke residue and wood charcoal briquettes using the proposed binder have an abrasion resistance 1.5-2 times higher than the prototype.

When the content of vat is deviated

the residue below the proposed limit reduces the yield of the coke oven or increases the polymerisation time of the reactor, and above it survives to shorten to a few minutes and it is difficult to prepare the mass for forming briquettes.

The introduction of the cubic binder residue of the distillation of furfural reduces its

cost and cost of briquettes.

Claims (2)

1. A binder for wood charcoal containing wood tar and sulfuric acid, characterized in that, in order to increase the yield of the coke binder and the resistance to ietration of pyrolyzed charcoal briquettes, it additionally contains the cubic residue of the distillation of furfural in the following ratio of components, mas.h: Drewen emola100 Cubic distillation furfural 15-40 Sulfuric acid2-8 2. A binder in accordance with claim 1, which is based on the fact that it contains wood pyrolyzed hardwood resin.