A Comprehensive Treatment Method of Mixed Waste Residue

A technology of mixed waste residue and comprehensive treatment, applied in the direction of improving process efficiency, can solve the problems of valuable metal elements not being effectively recovered, not being effectively recovered, and limited reference significance, achieving strong adaptability of raw materials and realizing environmental protection. , the effect of simple process

Active Publication Date: 2017-12-08
HUNAN ZHONGDA JOINT INNOVATION & TECH DEV CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the metallurgical waste slag is directly made into low-value-added cement, filler, etc., a small amount of valuable metals in it will not be effectively recovered, resulting in a waste of resources
At present, there have been applications of using smelting waste slag to prepare glass-ceramic plates, but similarly, the valuable metal elements in it have not been effectively recovered, resulting in a waste of precious resources; there are also nickel smelting slags used to prepare glass-ceramics after metal recovery The research on plates, but limited to nickel smelting slag, has limited reference significance for the treatment of smelting waste slag, and the adaptability is not strong

Method used

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  • A Comprehensive Treatment Method of Mixed Waste Residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a kind of like figure 1 The comprehensive treatment method of the mixed waste slag shown in the present invention comprises the following steps:

[0030] (1) Mix the anode slime decopper slag, lead matte slag, lead-containing waste slag, pulverized coal slag, and waste CRT glass at a mass ratio of 5:1:1:10:20, and add reducing agent coke (accounting for mixing The mass fraction of waste slag is 5%) for high-temperature smelting at 1300° C. for about 4 hours to obtain a large amount of secondary smelting slag, a small amount of crude iron-copper alloy and lead-zinc fumes. The soot and iron-copper alloy are returned to other smelting projects for recycling, and the composition of the secondary smelting slag is: SiO 2 40%, Al 2 o 3 25%, CaO 2.5%, K 2 O+Na 2 O 23.2%, MgO 8%, Fe 2 o 3 0.5%, ZnO 0.2% and Sn 0.6%.

[0031] (2) the secondary smelting slag that step (1) obtains and lead-free CRT glass, quartz sand, additive (the mixture of calcite, aluminum feldspar, bar...

Embodiment 2

[0034] a kind of like figure 1 The comprehensive treatment method of the mixed waste slag shown in the present invention comprises the following steps:

[0035] (1) Mix anode slime decopper slag, lead matte slag, lead-containing waste slag, pulverized coal slag, and waste CRT glass at a mass ratio of 5:2:2:20:20, and add reducing agent coke (accounting for the mixed The mass fraction of waste slag is 3%) for high-temperature smelting at a melting temperature of 1350°C and a smelting time of about 3.5 hours to obtain a large amount of secondary smelting slag, a small amount of crude iron-copper alloy and lead-zinc fumes. The soot and iron-copper alloy are returned to other smelting projects for recycling, and the composition of the secondary smelting slag is: SiO 2 36%, Al 2 o 3 25%, CaO 4.9%, K 2 O+Na 2 O 23%, MgO 7.6%, Fe 2 o 3 1%, ZnO 0.5% and Sn2%.

[0036] (2) The secondary smelting slag obtained in step (1) is prepared according to the batching ratio by secondary ...

Embodiment 3

[0039] a kind of like figure 1 The comprehensive treatment method of the mixed waste slag shown in the present invention comprises the following steps:

[0040] (1) Mix anode slime decopper slag, lead matte slag, lead-containing waste slag, coal powder slag, and waste CRT glass at a mass ratio of 7:2:2:15:15, and add reducing agent coke (accounting for mixing The mass fraction of waste slag is 4%) for high-temperature smelting at a melting temperature of 1350° C. and a smelting time of about 4 hours to obtain a large amount of secondary smelting slag, a small amount of crude iron-copper alloy and lead-zinc fumes. The soot and iron-copper alloy are returned to other smelting projects for recycling, and the composition of the secondary smelting slag is: SiO 2 40%, Al 2 o 3 23%, CaO 4.9%, K 2 O+Na 2 O 25%, MgO 6%, Fe 2 o 3 0.7%, ZnO 0.1%, and Sn 0.3%.

[0041] (2) The secondary smelting slag obtained in step (1) is prepared according to the batching ratio by secondary sme...

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Abstract

The invention discloses a comprehensive treatment method for mixed waste residues. The comprehensive treatment method comprises the following steps that (1) the mixed waste residues are mixed with reducing agent coke for reduction smelting to obtain iron-copper alloy, lead-zinc smoke dust and secondary smelted slag; (2) lead-free cathode ray tube (CRT) glass, quartz sand and an additional agent are added for glass ceramic smelting according to components of the secondary smelted slag, and obtained molten glass microcrystalline phase is subjected to water quenching granulation to obtain glass ceramic particles; and (3) the obtained glass ceramic particles are subjected to pressing plate molding forming, formed materials are subjected to nucleation and crystallization treatment to obtain glass ceramic plates with good performance. The mixed waste residues are treated through a two-step high-temperature smelting method, valuable metal in the residues can be effectively recycled and enriched, and the technical process is simple. Meanwhile, the follow-up preparation of the glass ceramic plates is combined, so that economic profits are achieved.

Description

technical field [0001] The invention relates to a comprehensive treatment method for mixed waste slag, in particular to a method for recovering primary smelting slag and a method for preparing glass-ceramic plates by using secondary smelting slag. Background technique [0002] At present, my country's energy and resource constraints are becoming more and more prominent, and the environmental pressure is increasing. The constraints of resources, energy, and the environment on economic development have become a relatively prominent problem. In order to make more effective use of resources, our country proposes to vigorously develop circular economy, actively advocate energy conservation and emission reduction, and require the coordinated development of economic construction and population, resources and environment, which can not only achieve the purpose of economic development, but also protect the natural environment on which human beings depend. Resources and environment en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00C22B13/02C03C6/10C03C10/00
CPCC03C10/0018C03C10/0063C22B7/001C22B13/025C22B15/0054Y02P10/20
Inventor 郭学益田庆华李栋
Owner HUNAN ZHONGDA JOINT INNOVATION & TECH DEV CO LTD
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