Iron-based carbon-containing pellets with waste plastic as carbon source and preparation method thereof

Abstract

The invention discloses an iron base carbonaceous pellet using waste plastics as a carbon source and a preparation method of the iron base carbonaceous pellet, and belongs to the field of metallurgical industry. The carbonaceous pellet is formed by the following components in percentage by weight: 70-85% of ferriferous base material and 15-30% of waste plastics, wherein the waste plastics is composed of acrylonitrile-butadiene-phenethylene, polypropylene, polyvinyl, polystyrene, polyethylene terephthalate, poly (butylene terephthalate), polyamide, PC polycarbonate, and methyl methacrylate; the preparation method comprises the following steps: preparing raw materials, mixing raw materials, weighing each raw materials according to the ratio, fully mixing, preparing the pellet, drying the pellet under hot wind, reducing by calcining the pellet in a reducing furnace under the temperature of 1200-1250 DEG C for 15-30 min. According to the invention, the coal resource is saved, and the resource recycle of waste plastics in metallurgical industry is realized.

Description

technical field [0001] The invention relates to an iron-based carbon-containing pellet with waste plastic as a carbon source and a preparation method thereof, belonging to the field of metallurgical industry. Background technique [0002] Carbon-containing pellets refer to the pellets prepared by adding a certain proportion of carbon-containing substances as reducing agents to iron-containing materials by pelletizing or briquetting technology. As a new type of iron-making raw material with good self-reducing performance, it is The production of metallized raw materials, the new process of direct reduction ironmaking, and the development of new processes for the treatment of iron-containing waste and complex refractory ores provide the possibility. The practice of blast furnace production shows that when the amount of carbon-containing pellets is 30%, the productivity of the blast furnace increases by about 6-7%, the coke ratio decreases significantly by more than 25%, and th...

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Problems solved by technology

The above-mentioned patents have the following defects: ①The density of different types of waste plastics varies greatly, which has a great impact on the physical structure, reduction process and effect of the pellets, and the non-standard recycling and classification of waste plastics in my country has caused most of the waste plastics to come from complex sources. Hybrid, so this patent cannot effectively solve the above practical problems

②Within the plastic particle size range given by the patent, the pellets cannot realize the close accumulation of the mixture, which weakens the contact degree between waste plastics and iron-containing materials. Basic loss of function

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