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Tungsten smelting waste residue ceramsite without added components and preparation method thereof

A technology of waste slag and ceramsite, applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., to achieve strong viscosity and plasticity, reduce sintering energy consumption, and low manufacturing cost

Active Publication Date: 2019-05-28
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a kind of tungsten smelting waste slag ceramsite without any added ingredients and its preparation method, which mainly solves the problems of low-cost harmless treatment and resource utilization of tungsten smelting waste slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A company's tungsten smelting waste residue, the main components are:

[0014] Element

SiO 2

Fe

mn

WO 3

Al 2 o 3

CaO

Na 2 o

content

12.5％

30.7％

15.6％

1.3％

2.6％

10.2％

5.1％

[0015] The waste residue discharged from the tungsten smelting process is filtered through a filter press, and after 5 hours of natural drying, it is sent to a double-roll granulator for granulation and molding to obtain a ceramsite blank.

[0016] Dry the ceramsite blank at 105°C for 3 hours.

[0017] Put the dried ceramsite billet into the sintering furnace with a heating rate of 15°C / min, keep it at 1100°C for 1 hour, cool down with the furnace, and get the finished ceramsite product out of the furnace.

[0018] The main properties of the prepared ceramsite products (see the table below) meet the performance standard requirements of GB_T 17431.1-2010 for artificial lightweight aggregates.

[0019] Bulk densi...

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Abstract

The invention discloses a short-flow and low-cost preparation method of tungsten smelting waste residue ceramsite without any added component and relates to the technical field of resource utilizationand harmless treatment of smelting slag. Raw materials for preparing the ceramsite are completely composed of tungsten smelting waste residues and no other component needs to be added; the preparation method of the ceramsite comprises the following steps: after naturally drying the tungsten smelting waste residues produced by tungsten smelting for a certain time, directly conveying the tungsten smelting waste residues into a paired roller granulation machine for granulating and molding; finally, drying is performed and then calcining is performed to obtain a ceramsite finished product. The ceramsite provided by the invention is light in weight and high in strength and can be used as a building material; the preparation method provided by the invention is used for carrying out the resourceutilization on the tungsten smelting waste residues, has the simplest preparation flow and has good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of resource utilization and harmless treatment of smelting slag, and in particular relates to a tungsten smelting waste slag ceramsite without additives and a preparation method thereof. Background technique [0002] The current tungsten smelting enterprises all use the alkaline leaching process to treat tungsten concentrates, which will produce a large amount of tungsten smelting waste residues. According to statistics, in the past 20 years, the total amount of tungsten smelting waste residues produced in my country has exceeded 600,000 tons. It is still growing at a rate of more than 20,000 tons per year. At present, most of the tungsten smelting waste residues are landfilled or stored. On the one hand, it takes up a lot of space. On the other hand, because the tungsten smelting waste residue contains a large amount of active heavy metal components and alkaline substances, if it is not properly managed, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B18/14
CPCY02W30/91
Inventor 靖青秀黄晓东彭建
Owner JIANGXI UNIV OF SCI & TECH
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