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Environment-friendly type steel billet coating material

An environment-friendly and coating technology, applied in coatings and other directions, can solve the problems of environmental pollution of chromium-containing coatings, and achieve the effects of good spreading performance, compact sintering and good anti-oxidation performance

Inactive Publication Date: 2008-07-23
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of environmental pollution in current chromium-containing paints, the invention provides an environmentally friendly paint, which cancels the chromium component in the paint but can still achieve the performance of chromium-containing paints

Method used

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  • Environment-friendly type steel billet coating material
  • Environment-friendly type steel billet coating material
  • Environment-friendly type steel billet coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Environmental protection type steel billet coating, which is made by mixing base material and suspending agent;

[0023] The base material in this embodiment is made by mixing the following components in parts by weight: sintered magnesia 70, fused magnesia 10, bentonite 1, dextrin 1.0, sodium tripolyphosphate 3, and silicon micropowder 4.

[0024] The base material adopts a particle size classification ratio, based on the total weight of the base material: 150 mesh: 6 wt%, 180 mesh: 80 wt%, 200 mesh: 8 wt%, 320 mesh: 6 wt%.

[0025] The suspending agent is sodium polyacrylate, which accounts for 6wt% of the total weight of the coating. After the sodium polyacrylate and water are mixed in a weight ratio of 1:4, they can be mixed with the aforementioned base material.

[0026] Comparative experiment 1:

[0027] The following is a comparative experiment on the oxidation of the steel billet without coating and the steel billet using the coating of the present invention.

[002...

Embodiment 2

[0033] The weight parts of the components of the base material in this embodiment are: sintered magnesia 74, fused magnesia 10, bentonite 4, dextrin 0.6, sodium tripolyphosphate 3, and silicon micropowder 3.

[0034] The particle size classification ratio of the base material is: 150 mesh: 7 wt%, 180 mesh: 75 wt%, 200 mesh: 9 wt%, and 320 mesh: 9 wt%.

[0035] The suspending agent is sodium polyacrylate, which accounts for 7wt% of the total weight of the coating. After the sodium polyacrylate and water are mixed in a weight ratio of 1:4, they can be mixed with the aforementioned base material.

[0036] Comparative experiment two:

[0037] The following is a comparative experiment on the spreading performance of the coating described in this embodiment and the chromium-containing coating on the surface of a steel billet at 600°C.

[0038] Figure 5 is a photograph of the spreading performance of the coating of the present invention on the surface of a steel billet at 600°C.

[0039]...

Embodiment 3

[0042] The base material in this embodiment is made by mixing the following components in parts by weight: sintered magnesia 80, fused magnesia 5, bentonite 3, dextrin 0.7, sodium tripolyphosphate 7, and silicon micropowder 1.

[0043] The base material adopts a particle size classification ratio, based on the total weight of the base material: 150 mesh: 10wt%, 180 mesh: 70wt%, 200 mesh: 10wt%, 320 mesh: 10wt%.

[0044] The suspending agent is sodium polyacrylate, which accounts for 8wt% of the total weight of the coating. After the sodium polyacrylate and water are mixed in a weight ratio of 1:4, they can be mixed with the aforementioned base material.

[0045] Comparative experiment three:

[0046] The following is a comparison experiment of the slag erosion resistance performance of the coating described in this embodiment and the chromium-containing coating at 1350°C on the surface of the billet.

[0047] Figure 7 is a photograph of the slag corrosion resistance of the surface...

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Abstract

The invention provides an environment-friendly steel billet coating, which is characterized in that: to deal with the environmental pollution problem of the present chrome complex coating, the steel billet coating cancels the chrome component in the coating and still can reach the performance of the chrome complex coating; the environment-friendly steel billet coating is prepared by base material and suspension agent; the base material is prepared by the following components with the following parts by weight: magnesite clinker of 70 to 80, fused magnesite of 5 to 10, bentonite of 1 to 5, dextrin of 0.5 to 1.0, trimeric sodium phosphate of 3 to 7 and silicon micro mist of 1 to 4; the suspension agent is sodium polyacrylate, accounting for 6 to 8wt% of the total weight of the coating. The environment-friendly steel billet coating has the advantages of having application in all steel billets, being non-pollution to environment for canceling Cr component, enabling the erosion-resisting characteristic of the coating reach the performance of the chrome complex coating by adjusting the prescription, steady antioxygenic property, good suspension property, good spreadability, dense sintering at high temperature, being without crack and facilitating popularization and application.

Description

Technical field [0001] The invention relates to a paint, in particular to a paint sprayed on the surface of a steel billet in a wet manner. Background technique [0002] Steel rolling in the metallurgical industry needs to heat various billets. During the heating process, the billet easily reacts with the oxygen in the furnace to form an oxide scale on the surface, which greatly reduces the yield of the billet. Therefore, it is necessary to spray a kind of high temperature resistance on the surface of the billet. The spray coating to prevent the oxidation of the steel billet can isolate the steel billet from oxygen during the heating process and reduce the oxidation of the steel billet. [0003] At present, only coatings for silicon steel billets contain industrial chromium trioxide. Chromium trioxide is also called chromium oxide or chromium oxide green, molecular formula Cr 2 O 3 , Molecular weight 151.99, amorphous dark green powder, hexagonal crystal system, specific gravity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/68C09D133/02
Inventor 易碧辉洪学勤高永生田先明陈克强郑吉红
Owner 武钢集团有限公司