Raw material treatment and pelletizing system process for rotary hearth furnace

Abstract

The invention discloses a raw material treatment and pelletizing system process for a rotary hearth furnace (RHF). The process comprises the following steps of: conveying various high-zinc iron-containing dusts to be treated to a mixing tank for mixing; and moistening, grinding and pelletizing the dusts and adhesive mixture required by pelletizing to produce the high-zinc iron-containing pellets which meet the high index parameter requirements of the RHF. The process effectively overcomes the adverse factors, such as large fluctuation, poor pelletizing performance and the like, of the raw material components, such as zinc-containing dust, sludge and the like, by combining the actual conditions of the high-zinc iron-containing sludge and dust raw materials of each iron and steel plant, and has the advantages of perfect function, accurate ingredients, compact layout and reasonable manufacturing cost; and the high-zinc iron-containing pellets which meet the high index parameter requirements of the RHF can be stably produced.

Description

Technical field [0001] The invention relates to the treatment and recycling of high-zinc iron-containing sludge and dust in the iron and steel industry, and particularly relates to a method for producing high-zinc iron-containing iron that meets the parameter requirements of a rotary hearth furnace by using zinc-containing dust and sludge required to be processed by a steel plant The process of pelletizing. Background technique [0002] Most of the zinc contained in the zinc-containing raw materials used in the iron and steel production process enters the iron-containing dust and sludge, and as the amount of galvanized steel scrap continues to increase, the zinc content of metallurgical solid waste is getting higher and higher. Due to the high iron content of dust and sludge, they are a valuable renewable resource. According to the national resource utilization and environmental protection policies, as well as the concept of circular economy, these iron-containing dust and sludg...

AI Technical Summary

Problems solved by technology

At present, Japan does not have a set of raw materials that can be used in a wide range of applications, from sludge drying, material pneumatic sealing and conveying, dry sealing and precise batching, raw material grinding and mixing and humidification, pelletizing, screening and drying, continuous recycling of unqualified materials without landing This complete raw material treatment and pelletizing process with a small footprint and no secondary environmental pollution

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