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Iron tailing heat-adsorption ceramic material, and preparation method thereof

A technology of ceramic materials and functional ceramics, applied in the field of ceramics, can solve problems such as unseen applications, and achieve the effects of simple process, reduced dependence, and reduced production costs

Active Publication Date: 2019-09-03
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is impossible to improve the comprehensive utilization level of iron tailings resources under the condition of lower cost
Among them, most of the research on the preparation of ceramics from iron tailings as the main raw material is in the field of far-infrared ceramics, and there is no application in the field of solar heat absorbing materials.

Method used

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  • Iron tailing heat-adsorption ceramic material, and preparation method thereof
  • Iron tailing heat-adsorption ceramic material, and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0022] A method for preparing an iron tailings heat-absorbing functional ceramic material, the preparation method adopts the weight percentage composition of the iron tailings heat-absorbing ceramic material and the following process steps:

[0023] A. Put the iron tailings, balls and water in a ball mill at a ratio of 1:2:1.5 for more than 180 minutes and pass through a 200-mesh sieve to obtain iron tailings powder;

[0024] B. Put the iron tailings powder obtained in step A with a mass fraction of 37-42% and all other raw materials and balls into a ball mill at a ratio of 1:2, mill for 40 minutes to one hour, and mix all kinds of raw materials evenly , sieved;

[0025] C, the semi-dry pressing molding method is adopted to make the ceramic body;

[0026] Add the ceramic powder prepared in the above step B to 8% water by weight, mix it evenly, put it into a mold, press it into a wet billet with a certain thickness, put it in a 100°C drying oven and dry it for 1 hour. Need bo...

Embodiment 1

[0031] In this embodiment, the iron tailings heat-absorbing functional ceramic material mass percentage of raw materials is as follows: 40% of iron tailings, 8% of kaolin, 6.37% of graphite, 10% of potassium feldspar, 0.33% of albite feldspar, 1.33% of potassium carbonate, Magnesium oxide 3.67%, ferric oxide 30.3%.

[0032] The iron tailings described in this example are Luanping iron tailings, and its main components are: 7.88% iron element, 44.87% silicon dioxide, 0.061% phosphorus element, 0.148% manganese oxide, 14.579% magnesium oxide, and 15.486% calcium oxide. %, titanium dioxide 1.060%, the sum of each component is 100%.

[0033] A. Preparation of iron tailings powder:

[0034] First put the iron tailings into a ball mill for ball milling for 180 minutes, dry after ball milling, and pass through a 200-mesh sieve to obtain iron tailings powder.

[0035] B, take iron tailings, kaolin, graphite, silicon dioxide, potassium feldspar, albite, potassium carbonate, magnesium...

Embodiment 2

[0042] The sources and preparation methods of the raw materials in this example are the same as in Example 1, except that the mass fraction of graphite in this example is 3.34%, and the mass fraction of ferroferric oxide is 33.33%. The sintering temperature is 1140°C.

[0043] The performance test of the prepared ceramic material shows that the average infrared emissivity is 0.80, the thermal conductivity is 1.75W / (m K) at 300 degrees Celsius, the compressive strength can reach 78MPa, and there is no crack on the surface after 25 thermal shock resistance tests (room temperature to 500°C).

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Abstract

The invention discloses an iron tailing heat-adsorption ceramic material, and a preparation method thereof. 100% of iron tailing heat-adsorption ceramic material comprises, by mass, 37-42% of iron tailings, 6-10% of kaolin, 1-13.33% of graphite, 5-12% of potassium feldspar, 0.2-0.5% of albite, 1-3% of potassium carbonate, 1 to 4% of magnesium oxide, and 26-35% of ferriferrous oxide. The infrared emission rate of the ceramic material is 0.75 or higher, the 300 DEG C heat conductivity coefficient is 1.70W / (m.K) or higher, the compressive strength is 70MPa or higher, after 25 times of thermal shock resistance tests, no surface cracking is caused (from room temperature to 400 DEG C), and the ceramic material is black. According to the preparation method, the novel heat-adsorbing function ceramic is prepared from iron tailings, adsorption on solar energy is realized, and waste is turned into valuables.

Description

technical field [0001] The invention belongs to the technical field of ceramics, and in particular relates to an iron tailings heat-absorbing ceramic material and a preparation method thereof. Background technique [0002] The development and utilization of mineral resources is an important guarantee for the development of the national economy and an important basis for human survival and social development. my country is a country with a large steel output. With the development of my country's steel industry, the discharge of iron tailings is also increasing. In recent years, the cumulative stock of iron tailings in my country has reached 16.9 billion tons, and iron tailings account for more than one-third of the total. [0003] The accumulation of a large number of iron tailings occupies a large amount of land resources, causing environmental pollution and safety hazards. Its main hazards include the following aspects: (1) The huge amount of stacking occupies a large amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/32
CPCC04B33/1324C04B33/32C04B2235/425C04B2235/3472C04B2235/3201C04B2235/3206C04B2235/3272C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607Y02P40/60
Inventor 孟军平王梓瑜冯倩梁金生杨雅迪高瑞雪陈荣豪
Owner HEBEI UNIV OF TECH
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