Search

RU-2861353-C1 - NUT COKE COMPOSITION

RU2861353C1RU 2861353 C1RU2861353 C1RU 2861353C1RU-2861353-C1

Abstract

FIELD: metallurgical industry. SUBSTANCE: invention relates to a technology for briquetting carbon fuel and can be used in the metallurgical and other industries. The nut coke is made of a carbon-containing material, a binder and water. Secondary carbon black obtained by processing automobile tyres is used as the carbon-containing material, and a gluten-protein binder is used as the binder. The ratio of components in the nut coke (by carbon) is, mas.%: secondary carbon black 65-75, gluten-protein binder 8-18, water the balance. EFFECT: increasing the mechanical compressive strength. 1 cl, 1 tbl, 6 ex

Inventors

  • Alekseev Artur Andreevich
  • Bashmakov Aleksandr Alekseevich
  • Gilmanshina Tatyana Renatovna

Dates

Publication Date
20260505
Application Date
20251204

Claims (2)

  1. A composition of coke nut, including a carbon-containing material, a binder and water, characterized in that the carbon-containing material used is secondary carbon black obtained from the processing of automobile tires, and the binder used is a gluten-protein binder in the following ratio of components (by carbon), wt.%:
  2. secondary carbon black 65-75 gluten-protein binder 8-18 water rest

Description

The invention relates to the technology of briquetting carbon fuel and can be used in metallurgy and other industries. It is known that coke nuts are used as a reducing agent for electrothermal metallurgical processes - a selected size class of 10-25 mm or 8-25 mm, which is obtained by screening coal coke - a solid residue from high-temperature processing of coal without air access (heating to 800°C-1100°C) [GOST 8935-2020]. The disadvantage of the coke nut reducing agent is its low reactivity. A fuel briquette for metallurgical processes and a method for its production are known [RU No. 2016048, published 15 July 1994], containing, in wt. %: granulated lignite coke with a specific surface area of up to 300 m2 /g 60-90; anthracite fines with a particle size of 0.5-4 mm 5-30; starch 5-10. The fuel briquette is obtained by mixing at 100-110 °C granulated lignite coke (with a granule size of no more than 5 mm), anthracite fines and starch with water, used in an amount of 15-40% of the weight of magnetic coke and anthracite fines, briquetting the mixture and drying; water can be partially used in the form of superheated steam, drying can be carried out in a furnace with a hot air circulation at 110-130 °C. The disadvantage of this method is the need to use hot air with a temperature of 110-130°C, and the holding time of the briquettes inside the oven must be at least 2 hours. A known method for producing smokeless household fuel [RU No. 2747049, published 23.04.2021] includes mixing the initial components - a carbon-containing material, which is grade MK-1 coke fines obtained by medium-temperature carbonization of brown coal, an organic binder selected from cereal flour, starch or beet molasses, a mineral additive, which is siltstone clay or bentonite, and water, followed by pressing the briquette mixture into briquettes and drying, characterized in that the initial components are mixed in the following amount, wt. %: carbon-containing material not less than 50.0; organic binder 5.0-30.0; mineral additive not more than 0.5; water - the rest. The technical result consists in obtaining smokeless household fuel briquettes with reduced ash content, as well as a reduced combustion period in the combustion device, which increases the capacity of the combustion device and allows for faster heating of the room. The disadvantage of this method is the need for drying at a temperature of 40-160°C, after which it is cooled at ambient temperature or dried naturally. The closest technical solution to the claimed invention is a method for producing a metallurgical briquette [RU No. 2638260, published 15.12.2017], including mixing the initial components - a carbon-containing material, a binder and water, pressing the briquette mixture and drying the formed briquette, wherein a two-component binder containing resin and flour in a ratio of 0.5:1 to 2:1 is used as a binder, where the initial components are taken in the following ratio, wt. %: carbon-containing material - at least 50; two-component binder - 8-40; water with a temperature of 1 to 99 °C - the rest. The technical result consists in obtaining a briquette with increased strength and low water absorption. The disadvantage of this method is the need to prepare the starting materials, namely MK-1 coke fines, which involves grinding and/or subsequent magnetic separation. It also requires heating the water to 99°C and drying the finished briquette at 150°C for 1 hour. All of these steps require additional energy costs and complicate the briquette production process. The purpose of this invention is to develop compositions of coke nut possessing high mechanical compressive strength, as well as to eliminate additional operations during its preparation. The technical result consists in increasing the mechanical compressive strength of coke nuts. The technical result is achieved by the fact that in the composition of the coke nut, which includes a carbon-containing material, a binder and water, what is new is that the carbon-containing material is secondary carbon black obtained from the processing of automobile tires, and the binder is a gluten-protein binder, with the following ratio of components (by carbon), wt. %: secondary carbon black65-75gluten-protein binder8-18waterrest Recycled carbon black is obtained as a byproduct of the recycling of rubber products from automobile tires. When using less than 65% recycled carbon black and more than 18% gluten-protein binder, nut coke requires additional drying in an oven at 100°C due to the increased water consumption required for its production. When using more than 75% recycled carbon black and less than 8% gluten-protein binder, nut coke lacks sufficient compressive strength. Secondary carbon black has the following characteristics: ash content 20.0-23.0%, moisture 0.2-0.3%, sulfur content 1.3-1.5%, phase composition, wt. %: amorphous carbon 50-55, graphite ≈30-39, sphalerite 10, calcite 1-5. Coke nut production is carried out