Bath smelting method and apparatus of zinc sulfide concentrate and lead-zinc containing materials

A zinc sulfide concentrate and melting pool smelting technology, applied in the field of non-ferrous metal smelting, can solve the problems of waste water and waste residue pollution, long process flow, poor comprehensive recovery, etc., achieve effective recovery, solve long-term pollution, and achieve good results in comprehensive recovery

Inactive Publication Date: 2013-11-13
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a solution for the serious problems of the existing zinc smelting process, such as long process flow, serious pollution of waste water and waste residue, high production cost (electrolysis power consumption ≥ 3000kwh), and poor comprehensive recovery. A molten pool

Method used

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  • Bath smelting method and apparatus of zinc sulfide concentrate and lead-zinc containing materials
  • Bath smelting method and apparatus of zinc sulfide concentrate and lead-zinc containing materials
  • Bath smelting method and apparatus of zinc sulfide concentrate and lead-zinc containing materials

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Experimental program
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Effect test

Embodiment 1

[0056] See attached figure 1 , 2 , 3, a molten pool smelting equipment for lead-zinc-containing materials, comprising an oxidation furnace 1 and a reduction furnace 2, the outlet of the oxidation furnace 1 is connected to the inlet of the reduction furnace 2 through a launder 4, and the outlet of the reduction furnace 2 It is connected to the fuming furnace 3 through the launder 4; the oxidation furnace 1 includes a furnace body 1-2 and a spray gun 1-3, and the furnace body 1-2 is a hollow cylinder, and the furnace body 1-2 is provided with a charging Port 1-1, flue gas outlet 1-4, lead-containing high-zinc slag discharge port 1-5, matte copper discharge port 1-6, spray gun socket, the spray gun 1-3 is inserted into the spray gun socket, and the rich Oxygen gas is blown into the furnace cavity; the reduction furnace 2 includes a furnace body, the furnace body is made of refractory materials, a rectangular furnace cavity is arranged in the furnace body, and a zinc vapor commun...

Embodiment 2

[0060] A molten pool smelting method for zinc sulfide concentrate and materials containing lead and zinc, comprising the following steps:

[0061] Step 1: Ingredients

[0062] The mass percentage of the composition composition is: Zn27.74%, lead 15.46%, Fe12.68%, S20.31%, SiO 2 7.32%, CaO2.46%, H 2 O ≤ 8%, the mass percent sum of each component is 100% lead-zinc-containing material, made into pellets with a particle size of 5-40mm;

[0063] A lead-containing high-zinc slag molten pool placed in an oxidation furnace, the temperature of the lead-containing high-zinc slag molten pool is 1250°C-1300°C; oxygen-enriched air (pressure 5 atmospheres, oxygen volume concentration 100%) is introduced, Oxidation reaction occurs in the granulated material, producing a high concentration of SO with a concentration of 21% by volume 2 Flue gas, lead-containing high-zinc slag and lead matte, high concentration SO 2 The flue gas is sent to make acid, the lead matte is released intermittentl...

Embodiment 3

[0068] The mass percentage of the preparation is: Zn24.14, lead 10.29, Fe27.81, S20, SiO 2 7.19, CaO0.86, H 2 O≤5% lead-zinc-containing materials, mixed and granulated to obtain 2000g of granulated material;

[0069] The lead-zinc material has a mass of 950.66g and a chemical composition (%): Zn50.00, Pb0.75, Cu0.085, Fe13.30, S30.65, SiO 2 2.30, Cd0.36, As0.029, In0.011 high-iron zinc sulfide concentrate; mass 230.79g, composition (%): S46.18, Fe30.16, Au42.42g / t, As0.28, SiO 2 6.90, CaO0.31 gold-bearing pyrite concentrate; and a mass of 818.56g, the composition (%) is: Pb24.26, Zn0.92, Fe42.18, S0.25, SiO 2 12.96,CaO2.00 ferric lead oxide ore composition.

[0070] First, put 1000g of mass percentage composition (%) into the molten pool smelting equipment containing lead and zinc materials: Zn28.45, Pb12.12, Fe31.91, S1.00, SiO 2 8.48, lead-containing high-zinc slag with CaO1.00, in a sealed state, heat up to 1250°C to melt it to form a superheated molten pool; use O 2 O...

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Abstract

The invention discloses a bath smelting method and an apparatus of zinc sulfide concentrate and lead-zinc containing materials. The smelting method comprises the following steps: mixing lead-zinc-containing mixed materials according to a certain proportion and pelletizing; and then, adding the pelletized materials into an oxidation furnace having a lead-containing high-zinc-slag bath with proper ingredients and smelting points, and blowing oxygen-enriched air into the bath for generating an oxidation reaction with the pelletizing materials to generate high-concentration SO2 flue gas and lead-containing high-zinc slag, wherein the SO2 flue gas is used for preparing acid, the lead-containing high-zinc slag is continuously discharged from the oxidation furnace into a reduction furnace bath, zinc in the lead-containing high-zinc slag is reduced into zinc vapor to be collected, and the lead is reduced into metal lead and such precious metals as gold and silver in the raw materials are captured and gathered at the bottom part of the bath to be discharged. The bath smelting method disclosed by the invention has the advantages of short flow, strong raw material adaptability, low energy consumption, environment friendliness, efficient source utilization and the like and is expected to solve the current treatment difficulty of high-iron zinc sulfide concentrate, zinc oxide ores, iron and steel plant zinc dust and gold-containing iron ores and the long-term pollution problems of zinc slag of hydrometallurgy.

Description

technical field [0001] The invention relates to a molten pool smelting method and equipment for zinc sulfide concentrate and materials containing lead and zinc, and belongs to the technical field of nonferrous metal smelting. Background technique [0002] my country is the world's largest producer of zinc. In 2012, the output of zinc metal was 5.13 million tons, most of which used the traditional wet process (roasting-leaching-electrolysis), and a small part of it used the fire process (closed blast furnace zinc smelting, Vertical tank zinc smelting, electric furnace zinc smelting). In addition to the shortcomings of long process flow, large investment, high production cost and poor comprehensive recovery, the traditional zinc hydrometallurgy process also has the following serious problems: 1) The amount of alum slag is huge, cannot be processed, and it will be stored for a long time, polluting the environment; The leaching slag still needs to be treated by pyrolysis, which ...

Claims

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Application Information

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IPC IPC(8): C22B13/02C22B19/04
Inventor 唐朝波陈永明唐谟堂刘志宏杨建广何静杨声海叶龙刚
Owner CENT SOUTH UNIV
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