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Sintering combined oxygen-enriched side-blown smelting process of vertical drying kiln

A drying kiln and process technology, which is applied in the field of vertical drying kiln sintering combined with oxygen-enriched side-blowing smelting process, which can solve the problems of high energy consumption and production cost, long process flow, and low bed capacity.

Inactive Publication Date: 2018-12-14
广州叶林环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is long, produces a lot of smoke, high energy consumption and production costs, and low bed capacity

Method used

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  • Sintering combined oxygen-enriched side-blown smelting process of vertical drying kiln

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0024] as attached figure 1 As shown, the present invention proposes a vertical drying kiln sintering combined with oxygen-enriched side blowing smelting process, including the following steps:

[0025] S1, add a small amount of lime and anthracite powder to the sludge containing copper and nickel, mix and stir evenly, after being granulated by the granulator, the feeding device is evenly fed into the vertical drying kiln from the top of the kiln, and moves down by its own weight; The air is blown in from the bottom and the side, and the anthracite in the material is burned to generate hot air, which flows upward through the gaps between the particles and exchanges h...

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Abstract

The invention discloses a sintering combined oxygen-enriched side-blown smelting process of a vertical drying kiln in the technical field of environmental protection systems. The smelting process comprises the following steps of adding little lime and fine anthracite to copper and nickel-contained sludge, mixing the lime, the fine anthracite and the copper and nickel-contained sludge proportionally and stirring evenly to obtain a mixture; pelletizing the mixture by a pelletizer to obtain pellets, and adding the pellets evenly into the vertical drying kiln from a kiln crown by a feeding device,wherein the pellets move down by dead weight; adding obtained agglomerated cakes from the furnace top of an oxygen-enriched side-blown smelting furnace continuously together with inorganic hazardouswastes, such as waste anode scraps, quartz stone, limestone, non-ferrous metal smelting waste and incineration disposal residues; making obtained slag enter an electric slag cleaning furnace after theobtained slag is discharged from the oxygen-enriched side-blown smelting furnace, reheating and clarifying and separating the slag by the electric slag cleaning furnace, thereby clarifying and separating copper and nickel mechanically entrained in the slag once again, and discharging the slag from the electric slag cleaning furnace and performing water quenching to make the slag become water-quenched slag; and disposing generated flue gas by processes of waste heat recovery, shock chilling, bag dust collection, sulfur removal, denitration, fluorine and chlorine removal and the like, thereby realizing up-to-standard discharge.

Description

technical field [0001] The invention relates to the technical field of hazardous waste treatment, in particular to a vertical drying kiln sintering combined with oxygen-enriched side blowing smelting process. Background technique [0002] Copper- and nickel-containing sludge mainly comes from heavy metal wastewater treatment systems in industries such as metal smelting, metal processing, machining, PCB circuit board etching, and industrial electroplating. Due to the wide source, variety, and complex composition of wastewater, there are various treatment methods Among them, the lime milk neutralization precipitation method is the most widely used and mature method. With the continuous increase of industrial production capacity, the amount of copper- and nickel-containing sludge is increasing. The content of N, P, K, organic matter and heavy metals Ni, Cd, Pb, Zn, Cu, Cr, As, Hg in this kind of sludge is relatively high, if it cannot be properly disposed of, it will cause seco...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B1/22C22B5/12C22B7/00C22B7/04C22B15/00C22B23/02
CPCC22B1/22C22B1/2406C22B5/12C22B7/001C22B7/04C22B15/0006C22B15/0052C22B23/025Y02P10/20
Inventor 何昭纯
Owner 广州叶林环保科技有限公司
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