Production process for separating and recycling metal smelting slag

A production process and metal smelting technology, which is applied in the field of metal smelting solid waste utilization, can solve the problems of low comprehensive utilization rate of slag waste, damage to the ecological environment, land occupation, etc., to achieve improved comprehensive utilization rate, less environmental pollution, and finished slag good quality effect

Active Publication Date: 2022-02-08
吴联权
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the comprehensive utilization rate of slag waste in our country is low, and most of them are stacked or buried in the open air, which not only wastes resources, but also takes up a lot of land and destroys the ecological environment around it.

Method used

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  • Production process for separating and recycling metal smelting slag

Examples

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Comparison scheme
Effect test

Embodiment 1

[0048] Grinding the slag obtained after metal separation to a specific surface area of ​​not less than 350m 2 / kg of micropowder, then mix the prepared slag micropowder with additives and use it as cement clinker admixture; The weight ratio of the water reducer, early strength agent and coagulant is 30:1:2:1; the blending weight ratio of the admixture and cement clinker is 1:4; the early strength agent is Sodium sulfate composite early strength agent, the coagulation accelerator is an alumina clinker coagulation accelerator.

Embodiment 2

[0050] Grinding the slag obtained after metal separation to a specific surface area of ​​not less than 350m 2 / kg of micropowder, and then mix the prepared slag micropowder with additives and use it as cement clinker admixture; wherein, the weight ratio of the slag micropowder to the water reducer is 30:1, and the admixture The blending weight ratio of raw material and cement clinker is 1:4.

Embodiment 3

[0052] Grinding the slag obtained after metal separation to a specific surface area of ​​not less than 350m 2 / kg of micropowder, and then mix the prepared slag micropowder with additives and use it as cement clinker admixture; wherein, the weight ratio of the slag micropowder to the water reducer is 30:1, and the admixture The blending weight ratio of raw material and cement clinker is 1:4;

[0053] Wherein, the slag fine powder is subjected to high-temperature reconstruction modification treatment, and the high-temperature reconstruction modification treatment includes the following steps:

[0054] S1. Mix the slag micropowder with cement clinker and silicon powder, add a small amount of ethanol as a binder, mix well and press to form, and heat treatment in a high-temperature electric furnace. The heat treatment procedure is: 90-100 ° C for 1- 2h; keep warm at 500-600°C for 2-3h; then raise the temperature to 1200-1300°C within 200min, use an inert gas to introduce an activ...

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Abstract

The invention provides a production process for separating and recycling metal smelting slag, which belongs to the technical field of metal smelting solid waste utilization, and is characterized in that slag harmless treatment is carried out through sequential cooling treatment, secondary metal recovery and tailing comprehensive recovery and utilization processes, so that sustainable development of enterprises is realized; firstly, slag granulation and dehydration are carried out through a Jiaheng process to replace hydraulic conveying in a traditional process, the process is simple and reliable, environmental pollution is small, and the quality of finished slag is good; according to the invention, residual metal is removed through high-temperature reduction, and the smelting slag is activated through a modification treatment method and is used as a binding material admixture, so that the hardening strength of the binding material is improved, the slag waste is effectively utilized, and the comprehensive utilization rate of the slag waste is improved.

Description

technical field [0001] The invention relates to the technical field of metal smelting solid waste utilization, in particular to a production process for separating and reusing metal smelting slag. Background technique [0002] Mineral resources are an important material basis for the sustained growth of the national economy. The contradiction between the demand for mineral resources in the development of human society and the depletion and poverty of mineral resources is becoming increasingly acute. Solid waste is currently the only growing potential resource and wealth in the world, and it has become the consensus of the people to recycle the metal smelting process slag piled up around the city and turn waste into treasure. [0003] Slag is an oxide-based melt produced in the pyrometallurgical process; it is one of the important products of the smelting and refining of steel, ferroalloys and non-ferrous heavy metals, also known as molten slag. The melt produced in the proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/38C04B7/147C04B7/48C04B5/00
CPCC04B7/38C04B7/147C04B7/48C04B5/00Y02P40/10
Inventor 吴联权
Owner 吴联权
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