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A method for recovering carbon, copper and silver in zinc kiln slag

A technology of copper silver and kiln slag, which is applied in the direction of using liquid cleaning methods, cleaning methods and utensils, chemical instruments and methods, etc., can solve the problems of difficult wastewater treatment, large metal loss, high energy consumption, etc., to reduce chemical consumption, The effect of changing the surface activity of minerals and simplifying the process

Active Publication Date: 2021-08-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings of the current recovery process of zinc kiln slag, such as large loss of valuable metals, low recovery rate, high energy consumption, and difficult wastewater treatment, a new method with high recovery rate of valuable elements, low energy consumption, simple process flow, and follow-up The new zinc kiln slag treatment method with convenient handling has practical significance

Method used

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  • A method for recovering carbon, copper and silver in zinc kiln slag

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Experimental program
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Effect test

Embodiment 1

[0068] The main chemical components of zinc kiln slag raw materials are as follows: Zn 1.88wt%, Cu 1.17wt%, TFe 31.57wt%, S 5.30wt%, total C17.39wt%, Pb 0.25wt%, Ag 298.30g / t; Crush raw zinc kiln slag to -2mm, accounting for 75-80%, and use wet grinding under the condition of pulp weight percentage concentration of 65-70wt%, to -0.074mm, accounting for 80wt%, to obtain flotation raw materials; Put it into the flotation machine for pre-floating carbon. The concentration of the flotation pulp is 25-30wt%, and the flotation stirring speed is 1700rad / min. kerosene 3000g / t, mixed and stirred for 3min, added foaming agent terpineol oil 350g / t, mixed and stirred for 1min, and then inflated and scraped for roughing for 5min to complete pre-floating carbon to obtain carbon rough concentrate and floating carbon tailings, and then Put the coarse carbon concentrate in a flotation machine with a rotating speed of 2300rad / min and mix and stir for 1min, then inflate and concentrate for 3.5mi...

Embodiment 2

[0070] The main chemical components of zinc kiln slag raw materials are as follows: Zn 1.83wt%, Cu 1.14wt%, TFe 31.09wt%, S 5.28wt%, total C18.98wt%, Pb 0.23wt%, Ag 286.12g / t; Crush raw zinc kiln slag to -2mm, accounting for 75-80%, and use wet grinding under the condition of pulp weight percentage concentration of 65-70wt%, to -0.074mm, accounting for 80wt%, to obtain flotation raw materials; Put it into the flotation machine for pre-floating carbon. The concentration of the flotation pulp is 25-30 wt%, and the flotation stirring speed is 1600rad / min. Collecting agent kerosene 3200g / t, mixing and stirring for 3min, adding foaming agent terpineol oil 325g / t, mixing and stirring for 1min, and then inflating and scraping roughing for 5min to complete pre-floating carbon to obtain carbon rough concentrate and floating carbon tailings, Then put the coarse carbon concentrate in a flotation machine with a rotating speed of 2200rad / min and mix and stir for 1min, then inflate and conc...

Embodiment 3

[0072]The main chemical components of zinc kiln slag raw materials are as follows: Zn 1.95wt%, Cu 1.21wt%, TFe 30.31wt%, S 5.41wt%, total C16.26wt%, Pb 0.26wt%, Ag 303.28g / t; Crush raw zinc kiln slag to -2mm, accounting for 75-80%, and use wet grinding under the condition of pulp weight percentage concentration of 65-70wt%, to -0.074mm, accounting for 80wt%, to obtain flotation raw materials; Put it into a flotation machine for pre-floating carbon. The concentration of the flotation pulp is 25-30 wt%, and the stirring speed of the flotation is 1800rad / min. Collecting agent kerosene 2800g / t, mixing and stirring for 3 minutes, adding foaming agent terpineol oil 375g / t, mixing and stirring for 1 minute, and then inflating and scraping and foaming rough separation for 5 minutes to complete pre-floating carbon, and obtain carbon rough concentrate and floating carbon tailings. Then put the coarse carbon concentrate in a flotation machine with a rotating speed of 2400rad / min and mix ...

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Abstract

The invention discloses a method for recovering carbon, copper and silver in zinc kiln slag, which comprises: crushing zinc kiln slag and performing wet grinding to obtain flotation raw materials; Carry out carbon floatation in advance in a flotation machine to obtain carbon concentrate and pickling raw materials; carry out pickling treatment on the pickling raw materials to obtain copper-silver flotation raw ore pulp; place the copper-silver flotation raw ore pulp Copper-silver mixed flotation is carried out in the flotation machine to obtain copper-silver mixed concentrate and tailings. The present invention adopts crushing, pickling and flotation processes to comprehensively recover carbon concentrate and copper-silver mixed concentrate from zinc kiln slag, and achieves The purpose is to effectively dissociate mineral elements, change the surface activity of minerals, reduce the consumption of chemicals, and simplify the process flow.

Description

technical field [0001] The invention relates to the technical field of mineral processing engineering, in particular to a method for recovering carbon, copper and silver in zinc kiln slag. Background technique [0002] Zinc kiln slag is a kind of metallurgical waste slag. It is mixed with 45%~55% coke into the dried leaching slag produced by hydrometallurgy, and then put into the furnace at a temperature of 1100℃~ High-temperature reduction roasting is carried out in a rotary kiln at 1300°C. Pb, Zn, Cd, part of In and a small part of Ge in the leached slag volatilize and enter the dust for recovery, while the non-volatile Fe, Cu, Ag, Au, Ga , most of Ge and residual coke, SiO 2 About 90% of other impurities remain in the kiln slag. There are many valuable elements in zinc kiln slag, which is a secondary resource with great recycling value. However, it has long been regarded as a Metallurgical waste slag is stored in the slag factory or exported cheaply for paving roads or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B03B1/00B08B3/08B03D1/00
CPCB03B1/00B03D1/00B08B3/08B09B3/00
Inventor 李硕
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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