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Sintered brick and preparation method thereof

A technology for sintered bricks and brick blanks is applied in the fields of energy saving and environmental protection sintered bricks with fine-grained tailings as the main raw material and their preparation fields, and can solve the problems of high pulverized coal price, great influence on the cost of sintered bricks, unfavorable product market competitiveness, and the like. To achieve the effect of reducing costs and saving resources

Active Publication Date: 2014-11-19
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of pulverized coal, it has a great impact on the cost of producing sintered bricks, which is not conducive to improving the market competitiveness of products. Satisfied performance conditions such as temperature, plasticity, etc., cannot be satisfied by the raw materials themselves

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a kind of sintered brick, which comprises the following components in parts by mass: 80 parts of tailings, 20 parts of coal slime, wherein, after the tailings and coal slime are mixed, the SiO 2 The content is 60%, Al 2 o 3 content of 8%, CaO content of 4%, MgO content of 3%, Fe 2 o 3 The content of minerals is 8%, the content of other minerals is 9%, and the loss on ignition is 8%.

[0048] The preparation method of sintered brick in the present embodiment specifically comprises the following steps:

[0049] a: Concentrate and dehydrate the tailings and coal slime to a water content of 15%, then put the dehydrated tailings and coal slime into the mixer and stir slowly at a stirring speed of 201 rpm. After stirring for 13 minutes, pour Slowly add water to the mixer for wet mixing, and adjust the speed of the mixer to 482 rpm, and the mixing time is 16 minutes. It is ready to use when the raw materials are muddy by visual inspection;

[0050...

Embodiment 2

[0055] This embodiment provides a kind of sintered brick, which comprises the following components in parts by mass: 85 parts of tailings, 15 parts of coal slime, wherein, after the tailings and coal slime are mixed, the SiO 2 The content is 70%, Al 2 o 3 content of 6%, CaO content of 3%, MgO content of 4%, Fe 2 o 3 The content of other minerals is 5%, the content of other minerals is 7%, and the loss on ignition is 5%.

[0056] The preparation method of sintered brick in the present embodiment specifically comprises the following steps:

[0057] a: Concentrate and dehydrate the tailings and coal slime to a moisture content of 13% first, then put the tailings and coal slime into an inverted agitator and stir slowly at a stirring speed of 200 rpm for 14 minutes, then pour into Slowly add water to the mixer for wet mixing, and adjust the speed of the mixer to 480 rpm, and the mixing time is 17 minutes. It is ready to use when the raw material is muddy;

[0058] b: Send the ...

Embodiment 3

[0063] This embodiment provides a kind of sintered brick, which comprises the following components in parts by mass: 82 parts of tailings, 18 parts of coal slime, wherein, after the tailings and coal slime are mixed, the SiO 2 The content is 63%, Al 2 o 3 content of 10%, CaO content of 2%, MgO content of 1%, Fe 2 o 3 The content of minerals is 9%, the content of other minerals is 6%, and the loss on ignition is 9%.

[0064] The preparation method of sintered brick in the present embodiment specifically comprises the following steps:

[0065] a: First concentrate and dehydrate the tailings and coal slime to a moisture content of 14%, then put the dehydrated tailings and coal slime into the mixer and stir slowly at a stirring speed of 202 rpm. After stirring for 12 minutes, pour Slowly add water to the mixer for wet mixing, and adjust the speed of the mixer to 481 rpm, and the mixing time is 15 minutes. It is ready to use when the raw material is muddy by visual inspection; ...

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Abstract

The invention discloses a sintered brick prepared by taking tailings as main raw materials and a preparation method of the sintered brick. According to the method, coal slime and coal gangue are doped into fine grained tailings according to a certain ratio to serve as raw materials, so that the content of SiO2 in the mixture is between 50 and 70 percent, the content of Al2O3 is between 6 and 20 percent, the content of CaO is lower than 6 percent, the content of MgO is lower than 6 percent, and the heating value is controlled to be 1.465-1.780MJ / Kg, and therefore, the mixture is reasonable in grading, and the requirements on plasticity and heating value needed by the sintered brick are met. The sintered brick and the preparation method thereof provided by the invention have the effects that the defects of the tailings, the coal slime and coal gangue respectively serving as raw materials of the sintered brick are overcome due to the mixture, the mineral composition and physical characteristics of the raw materials are optimized, comprehensive utilization of the fine grained tailings is realized, and the cost of the sintered brick is reduced.

Description

technical field [0001] The invention belongs to the technical field of production of sintered bricks, in particular to an energy-saving and environment-friendly sintered brick with fine-grained tailings as the main raw material and a preparation method thereof. Background technique [0002] Sintered bricks are extruded clay bricks sintered at a certain temperature. Traditional sintered bricks are generally made of coal gangue, shale, fly ash and soil and other raw materials. Clay is used as the main raw material to produce sintered bricks. It is the most traditional method, which is to mix a certain proportion of coal powder in the clay, which has been banned by the state in recent years. With the continuous improvement of the country's environmental protection and circular economy requirements, the use of tailings to produce new building materials has developed rapidly, and there have been iron tailings, copper tailings, gold tailings, molybdenum tailings, zinc tailings, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B18/30
CPCY02W30/91
Inventor 范庆霞胡海洋陆云淡
Owner NANJING IRON & STEEL CO LTD
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