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A kind of processing method of copper mine raffinate

A treatment method and raffinate technology, which is applied in the field of copper mine raffinate treatment, can solve problems such as secondary pollution, underutilization of valuable resources, and no good comprehensive recycling methods, so as to reduce waste storage, is conducive to sustainable and healthy development, and improves the effect of maximizing utilization

Active Publication Date: 2017-07-28
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature and patent retrieval results show that the copper raffinate produced in the copper hydrometallurgy process has not been well comprehensively recycled due to problems such as complex components and low metal value; The neutralization method is used for simple treatment, and the treated paste slag is piled up, not only the valuable resources are not fully utilized, but also occupy a certain storage capacity, and there is also the possibility of secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A gold-copper mine in Longyan, Fujian Province adopts bio-pile leaching copper process. After the copper product is extracted and recovered, the raffinate pH is 2.5, the copper content is 1.2g / L, the arsenic is 0.8g / L, the lead is 0.17g / L, and the ferric iron is 2.8 g / L, ferrous iron 9.7g / L.

[0023] (1) Add 3.2 g of fresh reduced iron powder (active iron powder) to 1000 mL of the above raffinate to recover copper. The particle size of the added fresh reduced iron powder is 0.1-1.0 mm. The specific recovery process is two-stage closed-circuit countercurrent reduction process, fresh reduced iron powder is added from the outlet of the second stage, and the underflow copper-containing iron powder slag after the reaction is returned to the first stage for further replacement reaction. The reaction residence time of the whole process is controlled at 0.5-1.0h. After the reaction is completed The obtained underflow slag adopts the magnetic separation process to separate the c...

Embodiment 2

[0028] After extraction and recovery of copper products from a large copper mine in Jiangxi, the raffinate has a pH of 2.0-2.5, copper content of 1.6g / L, arsenic of 1.2g / L, cadmium of 0.1g / L, arsenic of 1.85g / L, ferric iron of 5.8 g / L, ferrous iron 16.3g / L.

[0029] Take 1000ml of the above-mentioned raffinate, add 5.2g of fresh reduced iron powder with a particle size of 0.1-1.0mm in two stages, filter after controlling the residence time of the whole reaction at 0.5-1.0h, and recycle the iron in the filter residue; Then add 0.25 g of sodium hydrosulfide to the waste liquid after copper recovery, control the pH of the reaction to 2.5 to 3.0, and filter after 0.5 h of reaction; add 10 to 15 g / L of sodium hydroxide to the above-mentioned treated liquid to control the pH to 7 ~8, 50~100m3 / L under the condition of aeration, the temperature is 40~50℃, and the reaction time is 1.0~1.5h. After the reaction is over, increase the aeration intensity to 100-200m3 / L, the temperature is ...

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Abstract

The invention discloses a copper mine raffinate treatment method. The copper mine raffinate treatment method includes steps: (1) adding iron powder into copper mine raffinate to realize copper recovery and acquisition of iron-containing waste liquid; (2) adding sodium hydrosulfide or sodium sulfide into the iron-containing waste liquid to realize deep removal of harmful elements and acquisition of aftertreatment liquid; (3) adding aluminium hydroxide, calcium hydroxide or sodium hydroxide into the aftertreatment liquid to realize catalytic oxidation, hydrolysis and polymerization to obtain an oxidation product; (4) subjecting the oxidation product to ageing, and drying to obtain a qualified solid polymeric ferric sulfate product. The iron powder is taken as a raw material for copper recovery pretreatment of the raffinate, then the sodium sulfide or the sodium hydrosulfide is added for deeply removing the harmful elements such as copper, arsenic, cadmium and chromium, and the treated iron-containing liquid is subjected to catalytic oxidation, hydrolysis, polymerization and ageing to obtain the qualified polymeric ferric sulfate which is a water treatment agent.

Description

technical field [0001] The invention belongs to the technical field of mine wastewater treatment, and in particular relates to a treatment method for copper mine raffinate. Background technique [0002] Copper and other non-ferrous metal resources are the foundation of national economic development. At the same time, the amount of wastewater discharged by the mining and smelting industry accounts for about 20% of the entire industrial wastewater discharge, which has a great impact on environmental pollution. Especially since the "18th National Congress", under the guidance of the ecological China construction policy, new challenges have been put forward for the sustainable development of mines. Under the current new normal economy, how to realize the level of resource utilization of mine wastewater and actively develop a green circular economy has become an issue that must be considered in the mine development process. Literature and patent retrieval results show that the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/14C22B3/46C22B15/00
CPCC01G49/14C22B3/46C22B15/0091Y02P10/20
Inventor 黄怀国季常青谢洪珍周有勤林鸿汉林海彬张卿陈征贤庄荣传
Owner 厦门紫金矿冶技术有限公司
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