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High temperature fireproof black paints , its preparation and use thereof

A black coating, high-temperature refractory technology, applied in the field of coatings, can solve the problems of reducing the service life of refractory and heat-insulating products, corrosion of refractory and heat-insulating products, easy to produce dust and cracks, etc., to improve the anti-scouring performance and good thermal shock resistance , the effect of improving the effective utilization rate

Inactive Publication Date: 2004-11-10
LUYANG ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used coatings include high-temperature refractory coatings (using temperature of 1400°C) and medium-temperature refractory coatings (using temperature of 1200°C). The fillers are mostly high-alumina fine powder and bauxite; the binders are mostly water glass and diphosphate Aluminum hydrogen, its chemical composition is mostly Al 2 o 3 and SiO 2 , when this type of coating is used at high temperature, it is also prone to dust cracks; and the impurity components such as potassium and sodium brought in by the binder have a corrosive effect on the refractory insulation products, which also reduces the use of refractory insulation products. life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Raw material weight composition: Fe 2 o 3 40 parts, Cr 2 o 3 20 copies, Ni 2 o 3 : 15 parts, MnO 2 8 copies, Co. 2 o 3 5 parts, ZrO 2 2 copies, Al 2 o 3 5 parts, SiO 2 5 copies;

[0035] crafting process:

[0036] (1) After the raw materials are mixed according to the proportion, they are put into a heat treatment furnace, and heat treated at 850-950° C. for 7-8 hours;

[0037] (2) the mixed powder after the heat treatment is cooled to room temperature, then add water ball mill, when adding water, by weight ratio, mixed powder: water=1: 1; ball mill until the particle size reaches 900~1000 mesh;

[0038] (3) The coating after ball milling adds binding agent and additive, and the weight ratio of adding is: the coating after ball milling: binding agent=1: 0.3; Binding agent uses aluminum oxide sol and polyvinyl alcohol; Additive is carboxymethyl The weight ratio of cellulose added is: paint after ball milling: additive = 1:0.1; mix well to obtain high...

Embodiment 2

[0042] Raw material weight composition: Fe 2 o 3 20 parts, Cr 2 o 3 25 copies, Ni 2 o 3 23 parts, MnO 2 8 copies, Co. 2 o 3 12 parts, ZrO 2 2 copies, Al 2 o 3 5 parts, SiO 2 5 copies;

[0043] crafting process:

[0044] (1) After the raw materials are mixed according to the proportion, they are put into a heat treatment furnace, and heat treated at 1300-1400° C. for 5-6 hours;

[0045] (2) the mixed powder after the heat treatment, after it is cooled to room temperature, add water ball mill, when adding water, by weight ratio, mixed powder: water=1: 0.2; ball mill until particle size reaches 200~400 mesh;

[0046](3) Add binder and additive to the coating after ball milling, the weight ratio of adding is: coating after ball milling: binder=1: 0.05; Modified organic silicone oil is used for binder; Additive is silica gel powder, the weight of adding The ratio is:

[0047] Paint after ball milling: additive = 1:0.01; mix well to obtain a finished high temp...

Embodiment 3

[0050] Raw material weight composition: Fe 2 o 3 20 parts, Cr 2 o 3 35 copies, Ni 2 o 3 : 10 parts, MnO 2 10 copies, Co. 2 o 3 8 parts, ZrO 2 2 copies, Al 2 o 3 5 parts, graphite 5 parts, SiO 2 5 copies;

[0051] crafting process:

[0052] Heat treatment at 950-1050°C for 6-7 hours; add water for ball milling, when adding water, according to the weight ratio, mixed powder: water = 1:0.5; ball mill until the particle size reaches 400-600 mesh; add binder and additive after ball milling, add The weight ratio is: material after ball milling: binder = 1: 0.1; the binder uses sodium silicate; the additive is a silane coupling agent, and the added weight ratio is: coating after ball milling: additive = 1: 0.05; Uniformly obtained high temperature resistant black paint finished product. The rest are the same as Example 1.

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Abstract

The invention discloses the process for preparing high temperature flame-proof blackwash and use, wherein the high temperature flame-proof blackwash comprises (by weight percent) ferric oxide 20-40%, chromium hemitrioxide green 20-35%, nickelic oxide10-23%, manganese dioxide 8-20%, cobaltic oxide 5-12%, zirconium dioxide 2-10%, aluminum oxide 5-10%, graphite 0-5%, silica dioxide 5-10%. The preparation process comprises mixing raw material, annealing 5-8h at 850-1400 deg. C, charging water at room temperature, ball milling to grain diameter of 200-1000 mesh, mixing by powder : water = 1:0.2-1, adding adhesive and additive into the ball milled paint by paint : adhesive : additive = 1:0.05-0.3:0.01-0.1, and bed blending.

Description

technical field [0001] The invention belongs to the category of coatings, and in particular relates to a high-temperature refractory black coating. Background technique [0002] When aluminum silicate fiber and its products or other high-temperature refractory and heat-insulating materials are used at high temperatures, slag and cracks will occur due to the high temperature, which will affect the quality of refractory materials or products. At present, surface coatings are generally used to treat the surface to prevent slag or cracks on the surface of refractory materials. Commonly used coatings include high-temperature refractory coatings (using temperature of 1400°C) and medium-temperature refractory coatings (using temperature of 1200°C). The fillers are mostly high-alumina fine powder and bauxite; the binders are mostly water glass and diphosphate Aluminum hydrogen, its chemical composition is mostly Al 2 o 3 and SiO 2 , when this type of coating is used at high temp...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/18
Inventor 鹿成洪鹿俊华马中军许妹华李京友张道玲
Owner LUYANG ENERGY SAVING MATERIALS CO LTD
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