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Low-temperature sintering and wear-resisting fire-resisting patching material for CFBB (Circulating Fluidized Bed Boiler) and preparation method thereof

A repair material and low-temperature sintering technology, which is applied in the field of low-temperature sintered wear-resistant and refractory repair materials and their preparation, to achieve the effects of not easy to fall off and crack, good wear resistance and good construction performance

Inactive Publication Date: 2016-02-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the wear in CFBB is determined by its operating characteristics (i.e. high ash content, low temperature), the production safety hazards caused by long-term erosion and wear cannot be ignored

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method of the low-temperature sintering wear-resistant refractory repair material that can be used for CFBB, it comprises the steps:

[0023] 1) Preparation of phosphate composite binding glue:

[0024] ①According to the mass parts of each raw material: phosphoric acid [concentration is 85wt% industrial phosphoric acid (H 3 PO 4 )] 210 parts, Al(OH) 3 35.0 parts, ZnO10.9 parts, CuO3.5 parts, MgO1.9 parts, choose phosphoric acid (H 3 PO 4 ), Al(OH) 3 , ZnO, CuO and MgO;

[0025] ②Concentration is 85wt% industrial phosphoric acid (H 3 PO 4) and Al(OH) 3 , ZnO, CuO, and MgO are mixed, heated and reacted (the reaction temperature is controlled at 95-120°C), until a transparent glue is obtained, that is, a phosphate composite bonded glue is obtained;

[0026] 2) Preparation of wear-resistant and refractory coating repair materials:

[0027] According to the mass parts of each raw material: 15 parts of super bauxite aggregate (0-5mm), 30 parts ...

Embodiment 2

[0032] A kind of preparation method of the low-temperature sintering wear-resistant refractory repair material that can be used for CFBB, it comprises the steps:

[0033] 1) Preparation of phosphate composite binding glue:

[0034] ①According to the mass parts of each raw material: phosphoric acid [concentration is 85wt% industrial phosphoric acid (H 3 PO 4 )] 210 parts, Al(OH) 3 35.0 parts, ZnO10.9 parts, CuO3.5 parts, MgO1.9 parts, choose phosphoric acid (H 3 PO 4 ), Al(OH) 3 , ZnO, CuO and MgO;

[0035] ②Concentration is 85wt% industrial phosphoric acid (H 3 PO 4 ) and Al(OH) 3 , ZnO, CuO, and MgO are mixed, heated and reacted (the reaction temperature is controlled at 95-120°C), until a transparent glue is obtained, that is, a phosphate composite bonded glue is obtained;

[0036] 2) Preparation of wear-resistant and refractory coating repair materials: according to the mass parts of each raw material: 15 parts of super-grade bauxite aggregate (0-5mm, ie ≦5mm), 30 ...

Embodiment 3

[0040] A kind of preparation method of the low-temperature sintering wear-resistant refractory repair material that can be used for CFBB, it comprises the steps:

[0041] 1) Preparation of phosphate composite binding glue:

[0042] ①According to the mass parts of each raw material: phosphoric acid [concentration is 85wt% industrial phosphoric acid (H 3 PO 4 )] 210 parts, Al(OH) 3 35.0 parts, ZnO10.9 parts, CuO3.5 parts, MgO1.9 parts, choose phosphoric acid (H 3 PO 4 ), Al(OH) 3 , ZnO, CuO and MgO;

[0043] ②Concentration is 85wt% industrial phosphoric acid (H 3 PO 4 ) and Al(OH) 3 , ZnO, CuO, and MgO are mixed, heated and reacted (the reaction temperature is controlled at 95-120°C), until a transparent glue is obtained, that is, a phosphate composite bonded glue is obtained;

[0044] 2) Preparation of wear-resistant and refractory coating repair materials (according to the mass parts of each raw material: 18 parts of super bauxite aggregate (0-5mm, ie≦5mm), 26 parts o...

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Abstract

The invention relates to a low-temperature sintering and wear-resisting fire-resisting patching material for a CFBB (Circulating Fluidized Bed Boiler) and a preparation method of the low-temperature sintering and wear-resisting fire-resisting patching material. The preparation method is characterized by comprising the following steps of (1) mixing phosphoric acid with Al(OH)3, ZnO, CuO and MgO, carrying out heating reaction until a transparent glue solution is obtained, namely obtaining phosphate composite bound rubber; (2) preparing a wear-resisting fire-resisting coating patching material, wherein super-grade bauxite aggregate, brown corundum aggregate, dense corundum aggregate, sintered spinel, brown corundum powder, dense corundum powder, bauxite powder, lithionite, India potassium feldspar, albite, borocalcite are additionally added with silica fume, calcium aluminate cement and sodium tripolyphosphate; selecting and mixing raw materials, and obtaining the wear-resisting fire-resisting coating patching material; (3) mixing the wear-resisting fire-resisting coating patching material with the phosphate composite bound rubber, and obtaining a product. After the low-temperature sintering and wear-resisting fire-resisting patching material disclosed by the invention is used for patching an abraded position of a combustion chamber of the CFBB, good sintering can be realized, high-strength combination is formed by the low-temperature sintering and wear-resisting fire-resisting patching material and an original fire-resisting material basic body of a boiler wall, the low-temperature sintering and wear-resisting fire-resisting patching material cannot easily fall off, the wear resistance of the low-temperature sintering and wear-resisting fire-resisting patching material is good, the heat stability is high, the cost is low, and the construction performance is good.

Description

technical field [0001] The invention relates to a low-temperature sintered wear-resistant and refractory repair material for CFBB and a preparation method thereof. Background technique [0002] my country is a country dominated by thermoelectric energy, in which coal power generation dominates. Coal power generation mainly has two types of power generation equipment: one is pulverized coal furnace power generation, and the other is circulating fluidized bed boiler power generation. Pulverized coal furnace power generation has high requirements on coal quality, which is suitable for high-quality coal fuel; while my country's high-quality coal reserves are very limited, but low-quality coal reserves are very rich, how to make full use of the existing huge low-quality coal resources to ensure national economic development The large demand for energy has become an important issue facing the country. The use of circulating fluidized bed boilers (abbreviated as CFBB, which is the...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622
Inventor 张强
Owner WUHAN UNIV OF TECH
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