Airtight oxygen-rich negative pressure efficient smelting furnace directional smelting clean production process

Abstract

The invention discloses an airtight oxygen-rich negative pressure efficient smelting furnace directional smelting clean production process. The process includes: adopting an efficient smelting furnace; feeding low sulfur complex smelting slag and fusion agent ingredients into the furnace through a feed inlet; using coal gas or natural gas and coking coal as the heat supply fuel of reducing smelting, injecting oxygen at the efficient smelting furnace bottom side into the furnace; and carrying out reducing smelting by the efficient smelting furnace so as to ultimately realize directional separation and enrichment of lead, copper, zinc, tin, antimony, bismuth, gold, silver, indium and other valuable metals in soot, slag, iron matte, crude metals and other products. The process provided by the invention realizes the real sense of efficient clean production, the production process is short, and project investment is saved.

Description

technical field [0001] The invention relates to a process for comprehensive recovery of low-sulfur complex smelting slag resources, in particular to a clean production process for directional smelting in a closed oxygen-enriched negative-pressure high-efficiency smelting furnace. Background technique [0002] my country is a big country in non-ferrous metal industry. In 2012, the output of ten kinds of non-ferrous metals reached 36.91 million tons, a year-on-year increase of 9.3%. Among them, the output of refined copper, primary aluminum, lead, and zinc was 6.06 million tons, 19.88 million tons, 4.65 million tons, and 4.85 million tons, respectively, ranking first in the world. However, with the rapid development of my country's non-ferrous metal industry, the growth of reserves of mineral resources cannot keep up with the growth of production and consumption. Regardless of whether it is a large shortage of minerals or superior minerals, the static guarantee period is decl...

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Problems solved by technology

[0004] Aiming at the problems existing in the existing smelting production equipment technology: poor flue gas recovery effect, environmental pollution, high implementation cost, low utilization of waste slag reduction smelting reaction enthalpy, poor operating environment and high energy consumption; the present invention aims to solve The technical problem is to provide a clean production process for directional smelting in a closed oxygen-enriched negative pressure high-efficiency smelting furnace, which can selectively enrich and recycle valuable metals, and the harmless production of toxic elements such as arsenic, chromium, and cadmium in high-temperature slag chemical fixation, so as to realize the efficient and clean production in the true sense; the production process is short, saving engineering investment

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