Quantitative optimization method for pyrogenic-process copper smelting slag form

Abstract

The invention relates to a quantitative optimization method for a pyrogenic-process copper smelting slag form and belongs to the field of pyrogenic-process copper smelting technology. According to the method, first, a basic smelting slag system is determined according to composition characteristics of a technological form of copper smelting slag, percentage content of all components in slag phases and corresponding physical and chemical properties in a silicate system; CaO, SiO2 and Al2O3 in the slag system are used as variables, the percentage content of the remaining components is used as a fixed amount, the relation between relevant process variables is calculated according to the multi-element multi-phase equilibrium calculation principle of the Gibbs free energy minimization method, the mass percentage content of all phases in the copper smelting slag is calculated, and a topological method is utilized to draw a corresponding multi-element system phase diagram under normal pressure and designated temperature; positioning calibration is performed in the multi-element system phase diagram, phase composition and viscosity characteristics of a phase area nearby a composition point and other phase areas are analyzed, CaO / SiO2 is determined through calculation, and therefore the adding amount of CaO is determined; and experimental exploration is performed based on a theoretical analysis result, and comparative analysis is performed to determine the smelting slag form. Through the method, directional adjustment and control of the copper smelting slag form are effectively realized.

Description

technical field [0001] The invention relates to a method for quantitatively optimizing the slag type of pyrometallurgy furnace slag, which belongs to the technical field of pyrometallurgy copper smelting. Background technique [0002] At present, my country has become the world's largest copper consumer, accounting for about 20% of global consumption, but my country's copper ore resource reserves are not commensurate with the title of the largest copper consumer. According to the data of the Ministry of Land and Resources in 2015, my country's copper metal resource reserves are 11.5 million tons, the reserve base is 21.25 million tons, and the per capita reserves are less than half of the world's average level. In the past 15 years, my country's copper reserves have hardly increased, and the domestic mineral self-sufficiency rate has dropped from 53.78% to 28.8% within 10 years. It can be seen from this that my country's copper ore resources are difficult to meet the needs ...

AI Technical Summary

Problems solved by technology

Fe in copper slag 3 o 4 When the content is too high, it is easy to cause phenomena such as high viscosity of molten slag and high melting point, which will increase the mechanical inclusion of copper in the slag, which is not conducive to the recovery of copper. In severe cases, foamy slag will appear, threatening the normal operation of the copper smelting process ; When the ratio of calcium oxide and silicon dioxide in copper slag is out of balance, it will also deteriorate the physical and chemical properties of copper slag such as viscosity, melting point, and surface tension, resulting in increased smelting energy consumption, increased copper loss rate, and increased refractory erosion speed.

The traditional research method for copper smelting slag type optimization is experimental research method, that is, multiple experimental researches are carried out through single factor method to optimize the content of each component in the slag phase, which requires a large workload and high economic cost

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