Method for preparing foamed ceramic by microwave sintering of cobalt smelting waste slag

A technology of microwave sintering and foaming ceramics, which is applied in the field of solid waste resource utilization, can solve the problems of high energy consumption cobalt smelting waste residue, etc., and achieve the effects of shortening the firing time, lowering the sintering temperature, and lowering the foaming temperature

Inactive Publication Date: 2019-04-02
취저우화여우코발트뉴머터리얼컴퍼니리미티드
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a method for preparing foamed ceramics by cobalt smelting waste slag microwave sintering, and solve the problems of high energy consumption in the current foamed ceramic industry and high value-added comprehensive utilization of cobalt smelting waste slag

Method used

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Effect test

Embodiment 1

[0032] A method for preparing foamed ceramics by cobalt smelting waste slag microwave sintering, comprising the steps of:

[0033] 1. Ingredients are made according to the following weight percentages: 20% of oxygen-compressed slag left over from cobalt smelting, 70% of shale, 10% of waste glass powder, and 1% of silicon carbide powder (200 mesh);

[0034] 2. The ingredients are put into the balls and mixed evenly by wet grinding. The grinding medium is medium aluminum ceramic balls, the grinding speed is 12 rpm, and the grinding time is 15 hours; all the obtained powders pass through 200 mesh;

[0035] 3. Spray-dry powder (particle size is 20-80 mesh), put it into the mold after 24 hours of aging to make powder green body;

[0036] 4. The powder green body is directly microwave-heated to 1130°C for microwave sintering for 40 minutes, or preheated to 1050°C first, then microwave-heated to 1130°C for microwave sintering for 30 minutes, and then cooled to room temperature to for...

Embodiment 2

[0040] A method for preparing foamed ceramics by cobalt smelting waste slag microwave sintering, comprising the steps of:

[0041] 1. Ingredients are made according to the following weight percentages: 40% of non-ferrous metal ash left over from cobalt smelting, 60% of shale, 1% of sodium silicate 9 hydrate, and 0.8% of silicon carbide powder (2000 mesh);

[0042] 2. The ingredients are put into the ball and mixed evenly by dry grinding. The grinding medium is steel balls, the grinding speed is 15 rpm, and the grinding time is 4 hours; the obtained powder is less than 5% after passing through a million-hole sieve;

[0043] 3. The obtained powder is granulated by a roller press, and the particle size is 5 mesh, and it is laid into a mold to make a piled powder;

[0044] 4. The stacked powder is directly microwave-heated to 1150°C for microwave sintering for 15 minutes, or preheated to 1100°C first, then microwave-heated to 1150°C for microwave sintering for 10 minutes, and then...

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Abstract

The invention belongs to the technical field of resource utilization of solid wastes, and particularly relates to a method for resource utilization of cobalt smelting waste slag. The invention provides the method for preparing foamed ceramic by microwave sintering of the cobalt smelting waste slag. The method comprises the following steps: carrying out proportioning by using the cobalt smelting waste slag, filler, a liquid phase agent, a plasticizer and a foaming agent, carrying out grinding, mixing, granulating, and mold pressing or mold powder accumulation to prepare a green body; and carrying out microwave sintering to prepare the foamed ceramic. The microwave heating method is adopted, and compared with a conventional electric heating or fuel heating mode, the microwave heating methodhas the advantages that the foaming temperature is greatly reduced, the foaming time is shortened, and therefore energy consumption is greatly reduced. According to the method, the problems of high energy consumption in existing formed ceramic industry and high additional value comprehensive utilization of the cobalt smelting waste slag are solved.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of solid waste, and in particular relates to a method for resource utilization of cobalt smelting waste residue. Background technique [0002] At present, most of the thermal insulation materials used in China for building exterior walls are organic materials such as polyurethane, polystyrene, phenolic resin, etc., and the best combustion performance can only reach Class B, which cannot meet the requirements of Class A for fire resistance. Individual inorganic materials such as foamed cement, foamed glass, rock wool, expanded perlite, etc., although the combustion performance can reach Class A, there are a series of problems such as high water absorption and low strength. [0003] Foamed ceramics is a kind of ceramic material that uses various refractory raw materials as aggregates, together with fillers, plasticizers, liquid phase agents, foaming agents, etc., and is sintered at high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/138C04B33/132C04B33/13C04B38/02
CPCC04B33/131C04B33/1324C04B33/138C04B38/02C04B2235/3206C04B2235/3208C04B2235/3409C04B2235/3427C04B2235/3472C04B2235/36C04B2235/422C04B2235/425C04B2235/442C04B2235/443C04B2235/444C04B2235/445C04B2235/448C04B2235/667C04B2235/77C04B2235/9607C04B38/0067Y02P40/60
Inventor 侯雅军曲冬雪潘文凯曹志明
Owner 취저우화여우코발트뉴머터리얼컴퍼니리미티드
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