Manufacturing method of converter fly ash pressed balls

Abstract

The invention relates to a manufacturing method of converter fly ash pressed balls. The manufacturing method sequentially comprises the following steps: feeding converter fly ash to a #1 stock bin and feeding return mines to a #2 stock bin; feeding the converter fly ash and return mines to water spray double shafts to be stirred for pumping water and stirring, and then feeding the mixture to a digestion cabin to be digested through a shared bucket elevator; after digesting the converter fly ash and return mines in the digestion cabin for a time not shorter than half an hour, feeding the converter fly ash and return mines into a mixing machine and uniformly mixing with an adhesive; pre-pressing by using a prepresser, then primarily extruding and molding by virtue of a ball press machine, wherein after primary screening, overtails are primarily molded materials, which are fed into a return cabin; after the return cabin is filled, pressing finished products, adding a standby adhesive for the primarily modeled materials in a standby mixture, and pre-pressing by the standby prepressor, secondarily extruding and molding by using a standby ball press machine and secondarily screening to obtain overtails which are finished products; and after pressing the converter fly ash and return mines in the digestion cabin, re-filling the digestion cabin to start pressing. According to the manufacturing method provided by the invention, the ball pressing efficiency is not less than 12.5 ton / h.

Description

technical field [0001] The invention relates to a method for manufacturing a converter dust removal ash pressure ball. Background technique [0002] The dedusting ash produced in the metallurgical industry contains a large amount of iron and other precious metal elements, such as Fe, Cr, Ni, etc. Therefore, it is necessary to recycle the dedusting ash as a resource. However, since the dedusting ash exists in powder form, it cannot be recycled in the furnace. [0003] The main chemical components of converter dust removal are shown in Table 1. [0004] Table 1 Unit: wt% [0005] product name TF CaO SiO 2 MgO Al 2 o 3 P S Converter dust 50--60 9--17 1.5--4 2--7 0.2--2 0.03--0.1 0.05--0.2 [0006] The briquetting method of converter dedusting ash is secondary molding, that is, it needs to be formed by secondary extrusion with a pair of roller briquetting machines. There are two production lines, 1# production line and 2# production l...

AI Technical Summary

Problems solved by technology

[0008]1#, 2# production line process is exactly the same, because the dedusting ash pressure ball is a secondary molding process, it has to go through two production lines (1#, 2# production line) to As a product, therefore, its ball pressing efficiency is low, 8.1 tons - 9.2 tons / hour

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