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Comprehensive recovery method using zinc volatilized kiln slag as fuel

A recovery method and zinc volatilization technology, applied in the field of comprehensive recovery using zinc volatilized kiln slag as fuel, can solve problems such as poor economy, occupation of land resources, pollution, etc., and achieve the effects of solving environmental protection problems, simple process flow, and energy saving

Inactive Publication Date: 2020-06-16
葫芦岛宏跃北方铜业有限责任公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

my country is a big country in zinc hydrosmelting. A large amount of zinc volatilization kiln slag is discharged after the zinc leaching slag is processed through a rotary volatilization kiln every year. If it cannot be effectively treated, it will greatly restrict the development of hydrometallurgy.
Zinc volatilization kiln slag contains 30% fixed carbon and many kinds of valuable metals, and it is also a precious resource, but its comprehensive recycling is a worldwide technical problem, and it has long been regarded as metallurgical waste dumps in various parts of the country. The slag yard in the smelter is used for paving roads or making cement raw materials at a low price, which not only occupies a large amount of land resources, but also causes pollution to the environment due to the easy leakage of heavy metal ions contained in zinc volatilization kiln slag
[0003] At present, it is difficult to recover valuable metals in zinc volatilization kilns, and various technical and process routes are feasible, but the economy is poor

Method used

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  • Comprehensive recovery method using zinc volatilized kiln slag as fuel

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Experimental program
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Effect test

Embodiment 1

[0026] Zinc volatilization slag (main components Zn 1.56%; Cu 1.16%; Pb 0.48%; Fe 24.08%; S 4.74; Ag 225g / t; SiO 2 13.72; CaO 5.06%; MgO 2.29%; C 25%; calorific value 7500KJ / kg); copper concentrate (mainly composed of Cu24.95%; Fe 27.04%; S 33.72%; SiO 2 3.80%; CaO 0.28%; Pb 0.34%; Zn 1.32%; Ag 383.3g / t; As 0.30%; Bi 0.06%; Sb 0.06%; Al 2 o 3 1.52%; MgO 0.48%; F 0.02%); slagging agent quartz stone contains SiO 2 85%; limestone contains 50% CaO.

[0027] 1. Mixing materials: Zinc volatilization kiln slag, copper concentrate, pulverized coal, quartz stone, and limestone are stored in their own feeding bins, and the feeding belt of the feeding bin is equipped with a feeder to control the weight to adjust the feeding speed. Zinc volatilization kiln slag, quartz stone and limestone are mixed according to the proportions of 15%, 5.4% and 2.3% of the copper concentrate by weight respectively, and the zinc volatilization kiln slag, pulverized coal and copper concentrate are first s...

Embodiment 2

[0035] Zinc volatilization slag (main components Zn 1.56%; Cu 1.16%; Pb 0.48%; Fe 24.08%; S 4.74; Ag 225g / t; SiO 2 13.72; CaO 5.06%; MgO 2.29%; C 25%; calorific value 7500KJ / kg); copper concentrate (Cu 24.95%; Fe27.04%; S 33.72%; SiO 2 3.80%; CaO 0.28%; Pb 0.34%; Zn 1.32%; Ag 383.3g / t; As 0.30%; Bi 0.06%; Sb 0.06%; Al 2 o 3 1.52%; MgO 0.48%; F 0.02%); slagging agent quartz stone contains SiO 2 85%; limestone contains 50% CaO.

[0036] 1. Mixing materials: Zinc volatilization kiln slag, copper concentrate, pulverized coal, quartz stone, and limestone are stored in their own feeding bins, and the feeding belt of the feeding bin is equipped with a feeder to control the weight to adjust the feeding speed. Zinc volatilization kiln slag, quartz stone and limestone are mixed according to the proportions of 15%, 5.4% and 2.3% of the copper concentrate by weight respectively, and the zinc volatilization kiln slag, pulverized coal and copper concentrate are first sent into the dis...

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Abstract

The invention provides a comprehensive recovery method using zinc volatilized kiln slag as fuel. The zinc volatilized kiln slag, pulverized coal and copper concentrate are granulated together and thenmixed with quartz stone and limestone to be added into a copper smelting top-blowing molten pool smelting furnace, oxygen, air and diesel oil are sprayed into the smelting furnace through a spray gunat the same time, the oxygen-enriched air concentration is 40% - 50%, the zinc volatilized kiln slag and the pulverized coal are given with the specific air coefficient, and reacting is carried out at the temperature of 1150 - 1250 DEG C to generate copper matte and waste slag; the zinc volatilized kiln slag serves as the fuel as well as a reaction raw material to participate in metallurgical reaction, and contained silver is enriched in the cooper matte and recycled in the subsequent procedure of copper smelting; contained copper enters the copper matte and is directly recovered; contained zinc and contained lead enter smoke dust to be enriched, the smoke dust is collected through a waste heat boiler and an electric dust collector, and the smoke dust serves as a raw material to be conveyed to a lead-zinc imperial smelting furnace to recycle the zinc and the lead; and contained sulfur reacts to generate sulfur dioxide, the sulfur dioxide enters an acid making device along with the flue gas and is used for preparing sulfuric acid. The comprehensive recovery method using the zinc volatilized kiln slag as the fuel is suitable for comprehensive recovery of the zinc volatilized kiln slag.

Description

technical field [0001] The invention relates to the use of top-blown submerged molten pool smelting copper smelting technology in the technical field of nonferrous metal smelting to process zinc volatilization kiln slag, in particular to a comprehensive recovery method using zinc volatilization kiln slag as fuel. Background technique [0002] Zinc volatilization kiln slag is a by-product of zinc hydrometallurgy. It is the leached slag produced in the process of hydrometallurgy zinc smelting, which is dried and mixed with 45-55% coke. The residue formed by water quenching the residue after high-temperature reduction and volatilization of low-boiling point metals such as zinc, lead, cadmium, and indium in a rotary volatilization kiln at ~1300°C. Zinc volatilization kiln slag is a metallurgical waste slag with small particle size, high residual carbon and high hardness. It contains a variety of valuable metals but the content of valuable metals is low. It is essentially a waste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B7/04
CPCC22B7/001C22B7/04C22B15/003C22B15/0054Y02P10/20
Inventor 于洪王星戴林冲加文·彼得·斯维恩丛艳林张旭东
Owner 葫芦岛宏跃北方铜业有限责任公司
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