Plastic refractory and use thereof

A plastic and refractory technology, applied in the field of refractory materials, can solve the problems of easy melting, cracking and poor thermal conductivity of refractory materials

Active Publication Date: 2014-06-04
BAOJIUHE REFRACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a refractory plastic and its application, which is used to solve the problem of the refractory material being easily melted and damaged under the harsh combustion environment of the burner of the pulverized coal steam boiler in the prior art. , cracking, poor thermal conductivity, too thin slag shell, etc.

Method used

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  • Plastic refractory and use thereof
  • Plastic refractory and use thereof
  • Plastic refractory and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Comparison of physical and chemical indicators between the refractory plastic (1#) of the present invention and the corundum ramming material (2#) of Henan Dengfeng Konore Ceramic Material Co., Ltd.

[0043] The formula of refractory plastic (1#) of the present invention is as follows (see table 1):

[0044] Raw material type

Particle size (YB / T5204 and YB / T5164)

parts by weight

SiC97%

3-1

10

SiC97%

1-0

35.5

SiC97%

-0.21

2

SiC97%

-200M

5

SiC_97%

-325M

20.5

Silica powder 96%

8

Alumina powder

-800M

10

MgO)

0.05

sodium tripolyphosphate

0.15

Silica sol

7

[0045] Table 1

[0046] The preparation method of refractory plastic (1#) of the present invention is as follows:

[0047] 1) After mixing the raw materials except the binder and aggregate SiC according to the ratio of the raw materials, put...

Embodiment 2

[0056] table 3

[0057] Prepare refractory plastic material according to the formula of table 3, method is as follows:

[0058] 1) After mixing the raw materials except the binder and aggregate SiC according to the ratio of the raw materials, put them into the mixer and mix them for three minutes;

[0059] 2) Put the SiC aggregate into the mixer and knead fully for three minutes, then store the kneaded material in bags (usually 25kg a bag);

[0060] 3) After being transported to the site of use, put the mixed material into the mixer, add the binder according to the proportion, and fully mix it for three minutes before it can be used as a refractory plastic.

[0061]The chemical indicators, bulk density, linear change rate, flexural strength, compressive strength, thermal conductivity and other parameters of the obtained refractory plastic material were measured and compared, and the performance of each parameter was similar to that of Example 1.

Embodiment 3

[0064] Table 4

[0065] Prepare refractory plastic material by the formula of table 4, method is as follows:

[0066] 1) After mixing the raw materials except the binder and aggregate SiC according to the ratio of the raw materials, put them into the mixer and mix them for three minutes;

[0067] 2) Put the SiC aggregate into the mixer and knead fully for three minutes, then store the kneaded material in bags (usually 25kg a bag);

[0068] 3) After being transported to the site of use, put the mixed material into the mixer, add the binder according to the proportion, and fully mix it for three minutes before it can be used as a refractory plastic.

[0069] The chemical indicators, bulk density, linear change rate, flexural strength, compressive strength, thermal conductivity and other parameters of the obtained refractory plastic material were measured and compared, and the performance of each parameter was similar to that of Example 1.

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Abstract

The invention relates to the field of a refractory matter, and particularly relates to a plastic refractory and use thereof. The invention provides a plastic refractory. The plastic refractory comprises the following raw materials in parts by weight: 70-80 parts of silicon carbide, 5-15 parts of alumina powder, 5-15 parts of silica powder, 0.01-0.05 part of dispersing agents, 0.02-0.1 part of coagulant, and 6-8 parts of binding agents, wherein the silicon carbide comprises powder SiC and aggregate SiC; and the weight ratio of the powder SiC to the aggregate SiC is 1:(1.8-1.9). Compared with the prior art, the plastic refractory disclosed by the invention not only has the advantages of being good in workability and moderate in hardening speed, but also has good using performances, such as high strength, good abrasive resistance, good corrosion-resistance, good thermal shock stability, and good heat-conducting property, and can completely meet the operating requirements of a burner of a pulverized coal fired steam boiler.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a refractory plastic and its application. Background technique [0002] The pulverized coal burner is a device that sends pulverized coal into the furnace for combustion. According to its structure, it can be divided into the following two types: 1) Swirl burner: the primary air with pulverized coal and the secondary air without pulverized coal are respectively Use different pipes to connect to the burner. Pulverized coal and air can be fully mixed and form a recirculation zone. Each boiler can be equipped with 4 to 48 burners. 2) Direct-flow burner: the nozzle is narrow, and the primary and secondary air do not rotate in the burner. Coal powder can be completely burned in it. [0003] Shanghai Tiqiao Spinning Co., Ltd. has a patented product of a burner for a pulverized coal steam boiler. The flue gas emission makes this product have a good market prospect, but because i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 田峰杨大鹏
Owner BAOJIUHE REFRACTORY
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