Device, method and application thereof for simulating enrichment form of zinc or alkali metal in upper part of blast furnace

Abstract

The invention belongs to the technical field of blast furnace ironmaking, and particularly relates to a device, a method and an application thereof for simulating an enrichment form of zinc or alkalimetal in the upper portion of a blast furnace. According to the technical idea, the method mainly comprises the following steps of preparing raw fuel and a refractory material sample; distributing andplacing the raw fuel and the refractory material sample in an experimental furnace; forming blast furnace gas containing zinc steam or alkali metal (K and Na) steam or zinc and alkali metal mixed steam; heating and simulating the enrichment test; after the test is finished, carrying out segmented sampling on the enriched samples obtained in different temperature ranges; and performing microscopicanalysis on the sample to obtain an enriched form of alkali metal or zinc on the sample. According to the testing method for the enrichment and occurring form of the zinc or the alkali metal in the upper portion of the blast furnace, in the process of upward movement of the zinc and alkali metal in the blast furnace after being reduced along with coal gas under the blast furnace condition, the enrichment condition and the occurring form of the raw fuel and the refractory material in different temperature ranges can be simple and reliable simulated.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a device, method and application for simulating the enrichment form of zinc or alkali metal in the upper part of a blast furnace. Background technique [0002] Blast furnace is a traditional ironmaking technology, which has maintained vigorous vitality after long-term development. Among the various existing ironmaking processes, blast furnace ironmaking has always occupied an undisputed leading position. However, in recent years, in order to cope with the current unfavorable market situation, domestic iron and steel plants have used some low-priced ores with excessive alkali metal (K, Na) and zinc content as raw materials, which has brought a series of adverse effects on blast furnace production. [0003] After alkali metals (K, Na) and zinc enter the blast furnace with the charge, they are reduced and gasified into corresponding vapors in the high te...

AI Technical Summary

Problems solved by technology

[0005] The Chinese invention patent with the application number CN200910088143.1 discloses "Test Method and Device for Simulating Alkali Metal Circulation and Enrichment Law in Blast Furnace". Heating the furnace, so that the temperature in the furnace is distributed in three temperature ranges, rather than continuous, measuring the vapor of the alkali metal in the process of rising with the gas cannot accurately know at what temperature the zinc or alkali metal begins to form exist

In addition, the reaction crucible used is a graphite crucible. The reaction gas will react with graphite at the experimental temperature, and at the same time, the reaction gas will react with coke under high temperature conditions, which will change the composition of the reaction gas and cannot simulate the blast furnace atmosphere well.

Images