Combined determination method for main components in high-carbon ferrochrome slag

Abstract

A combined determination method for main components in high-carbon ferrochrome slag. The method is characterized by comprising the steps of: melting a high-carbon ferrochrome sample by a iron crucible; carrying out high-temperature melting decomposition by sodium peroxide; leaching in a 250ml plastic cup filled with water; acidifying and clarifying with sulfuric acid; placing at room temperature to obtain a high-carbon ferrochrome sample mother liquor; conducting constant volume analysis on the high-carbon ferrochrome mother liquor; decomposing the sample at one time; and respectively measuring the chemical composition of SiO2, Al2O3, MgO, CaO and Cr2O3 by 1) determination of Cr2O3 by potassium permanganate oxidation and ammonium ferrous sulfate titration method, 2) determination of SiO2 by a silicon molybdenum blue spectrophotometric method, and 3) determination of Al2O3, MgO and CaO by an EDTA volumetric method. The method greatly reduces the analysis time (determination of SiO2, Al2O3, MgO, CaO and Cr2O3 within four hours), while omits weighing and analysis of Al2O3 by a nickel crucible, and saves a lot of cost analysis.

Description

technical field [0001] The invention relates to a method for determining the main components of high-carbon ferrochrome and the field of reagents, in particular to a joint determination method for the main components of high-carbon ferrochrome slag and the preparation of reagents; a sample is melted in an iron crucible for chemical analysis, and the sample is decomposed at one time. The comprehensive determination of elements achieves the purpose of rapid and accurate determination of the main components of high-carbon ferrochrome slag. Background technique [0002] The main chemical composition of high carbon ferrochrome slag is SiO 2 、Al 2 o 3 , MgO, CaO and Cr 2 o 3 , Regular analysis of the chemical composition in the slag has great guiding significance for smelting production, it is the eyes of metallurgy. In production, sodium peroxide is generally used to melt and acidify high-carbon ferrochrome slag samples under high temperature conditions, and then analyze the...

AI Technical Summary

Problems solved by technology

In this way, when the elements in the high-carbon ferrochrome slag are determined separately, a lot of time is wasted in the melting and acidizing pretreatment process of the sample

Analysis of SiO by Traditional Methods 2 、Al 2 o 3 , MgO, CaO and Cr 2 o 3 , the use of perchloric acid dehydration gravimetric method for silica analysis takes a long time and requires multiple weighings, which not only increases the analysis cost, but also prolongs the analysis time. It takes more than 10 hours to complete a full analysis; therefore, It is planned to use the systematic analysis method to determine the content of silicon, chromium, calcium, magnesium and aluminum oxides in high-carbon ferrochrome slag, which has positive guiding significance for production enterprises