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Process for recycling sulfur and iron resources in copper and sulfur tailings

A copper-sulfur tailings and resource recovery technology, applied in the field of solid waste recycling, can solve the problems of difficult simultaneous recovery of iron and sulfur, complex operation process, and low recovery rate, so as to reduce processing costs, eliminate environmental pollution, and improve The effect of recycling efficiency

Inactive Publication Date: 2014-09-10
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetic separation recovery method is to separate and recover magnetic minerals in the tailings, such as pyrrhotite and magnetite, through a wet cylinder magnetic separator, but the recovery rate is low
The leaching recovery method is to use a leaching agent to leach minerals under specific conditions to obtain a leachate containing target resources, and to recover it by appropriate separation and purification methods. The operation process is complicated and the cost is high.
Both magnetic separation recovery and leaching recovery are difficult to achieve simultaneous recovery of iron and sulfur

Method used

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  • Process for recycling sulfur and iron resources in copper and sulfur tailings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The tailings produced by a copper-sulfur mine are 72% of the original ore, the tailings contain 12.2% of available sulfur and 18.3% of total iron, and the recovered sulfur and iron metals can reach 305kg / t. Grind the copper-sulfur tailings until 90% pass through a 200-mesh sieve; add copper sulfate 80g / t, sulfuric acid 30kg / t, butyl xanthate 120g / t, and No. 2 oil 20g / t for sulfide ore flotation. The analysis of copper-sulfur ore tailings and flotation products is shown in Table 1. The output of sulfide ore is 38.4%. The recoveries of S, Fe, Cu and Zn in sulfide ore are 93.07%, 91.00%, 93.25% and 96.00% respectively, and the contents of S and Fe are 29.57% and 43.39% respectively.

[0015] Table 1 Sorting test results of copper-sulfur tailings sulfide ore (%)

[0016]

[0017] After the coarse sulfide ore is dehydrated, coal powder is added according to the dry weight ratio of 1:0.03, and the moisture content of the mineral powder reaches 20% after mixing even...

Embodiment 2

[0019] The tailings produced by flotation of a copper-sulfur mine are 55% of the original ore. The tailings contain 8.2% of available sulfur and 15.3% of total iron. The recovered sulfur and iron metals are up to 235kg / t. The tailings are concentrated and dehydrated to a water content of 40%, and the ore is ground to 85% to pass through a 200-mesh sieve; sulfide ore flotation is added with copper sulfate 80g / t, sulfuric acid 30kg / t, butyl xanthate 120g / t, No. 2 oil 20g / t t. The analysis of copper-sulfur ore tailings and flotation products is shown in Table 1. The output of sulfide ore is 32.4%. The recoveries of S, Fe, Pb and Zn in sulfide ore reach 96.02%, 86.00%, 75.03% and 92.67% respectively, and the contents of S and Fe reach 24.3% and 40.6% respectively.

[0020] Table 2 Copper-sulfur tailings sulfide ore sorting test results (%)

[0021]

[0022] After the coarse sulfide ore is dehydrated, coal powder is added according to the dry weight ratio of 1:0.03, and...

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Abstract

The invention provides a process for recycling sulfur and iron resources in copper and sulfur tailings and belongs to the field of mine solid wastes recycling. The process is characterized in that the process includes firstly using a flotation method to recycle sulphide ores in the tailings to enriching sulfur and iron in the tailings to crude ores of the sulphide ores, wherein the recycling rate of effective sulfur reaches 95%; subsequently, using a roasting method to process the sulphide ores and recycling SO2 from smoke, wherein the concentration of SO2 in the smoke reaches 3% to 5%; performing dust removal and catalyzing to prepare a sulfuric acid, and subjecting a tail gas to an ammonia process of desulfurization to manufacture an ammonium sulfate product, wherein the recycling rate of the SO2 for manufacturing the sulfuric acid reaches to 95%; recycling magnetite from crushed roasting slags through a wet-type cylinder magnetic separator, wherein the recycling rate reaches 85%. According to the process for recycling the sulfur and iron resources in the copper and sulfur tailings, the sulfur and iron resources in the tailings are recycled through sorting enrichment and roasting, environmental pollution caused by sulphide ore tailings is eliminated, and high economic benefit and environmental benefit are achieved.

Description

technical field [0001] The invention relates to a recovery and treatment process for sulfur and iron resources in copper-sulfur tailings, in particular to the roasting recovery of sulfur in sulfide ore tailings and the separation and recovery of iron, belonging to the field of solid waste resource utilization. Background technique [0002] Tailings are the main cause of mine pollution. With the expansion of mine mining and dressing scale, the production of mine tailings in my country has been increasing. At present, tailings are stored in tailings ponds, which not only occupy a large amount of land resources, but also most of the tailings The reservoir has been in operation for many years and is facing the danger of dam failure, which has brought great hidden dangers to the safety of people's lives and property. On the other hand, because the current mining and dressing process cannot separate all metal elements, the tailings still contain a large amount of metal elements, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/06B03D1/00B03C1/00C22B1/02
CPCY02P10/20Y02W30/52
Inventor 晏波陈涛肖贤明雷畅
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI