Abrasion-proof fire-resistant moldable refractory

A plastic and fire-resistant technology, applied in the field of refractory materials, can solve the problems of wear resistance and erosion resistance, and achieve the effect of improving erosion resistance, high service temperature and good wear resistance

Inactive Publication Date: 2008-04-09
江苏国窑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Obviously, the above-mentioned refractory plastics are still not ideal in terms

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: The composition of the plastic aggregate is: corundum 75wt%, ≤4μm alumina fine powder 5wt%, ≤0.025mm chromium corundum fine powder 12wt%, ≤1μm silicon fine powder 3wt%, sillimanite 5w%. Testing performance index: bulk density (1000℃×3h) ≥ 3.0g / cm 3 , compressive strength (1000℃×3h) ≥ 140Mpa, abrasion resistance (1000℃×3h) ≤ 4cm 3 , Reburning line change (1000 ℃ × 3h) -0.3%, plasticity index 20-40%, refractoriness ≥ 1790 ℃. In the dense-phase area of ​​the 440T / h circulating fluidized bed furnace, use the electric power standard plastic as described in the background as the refractory lining, use the plastic in this example to make a small sample area, and check after running for one year. The surface of the example sample area is smooth, The wear is small, there is no peeling phenomenon, and there is no trace of erosion by coal slag; while the surface of the contrast plastic is rough, and the matrix particles appear (heavier wear).

Embodiment 2

[0014] Example 2: The composition of the plastic aggregate is: mullite 65wt%, ≤4μm alumina fine powder 10wt%, ≤0.025mm chrome corundum fine powder 15wt%, ≤1μm silicon fine powder 5wt%, andalusite 5w%. Testing performance index: bulk density (1000℃×3h) ≥ 2.7g / cm 3 , compressive strength (1000℃×3h) ≥ 120Mpa, abrasion resistance (1000℃×3h) ≤ 4.5cm 3 , Reburning line change (1000 ℃ × 3h) -0.3%, plasticity index 20-40%, refractoriness ≥ 1790 ℃. In the 400T / D waste incineration grate and side wall, this example can be partially applied with plastic, and the rest is made of electric standard material. After running for one year, the plastic surface of the present invention has little abrasion and no erosion phenomenon; the power standard material has erosion and peeling phenomenon.

Embodiment 3

[0015] Embodiment 3: The composition of the plastic aggregate is: Al 2 o 3 ≥85% bauxite clinker 76wt%, ≤4μm alumina fine powder 6wt%, ≤0.025mm chromium corundum fine powder 7wt%, ≤1μm silicon fine powder 4wt%, kyanite 7w%. Testing performance index: bulk density (1000℃×3h) ≥ 2.8g / cm 3 , compressive strength (1000℃×3h) ≥ 120Mpa, abrasion resistance (1000℃×3h) ≤ 4.5cm 3 , Reburning line change (1000 ℃ × 3h) -0.3%, plasticity index 20-40%, refractoriness ≥ 1750 ℃. In the 30T / D rotary kiln type medical waste incinerator, this example plastic is applied locally, and the rest is made of electric standard material. After running for one year, the plastic surface of the present invention has no erosion phenomenon, less wear and tear, smoother surface and no peeling phenomenon; the electric standard standard material has corrosion and peeling phenomenon.

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Abstract

The invention relates to an improvement to abrasion-resistant fireproof plastic, which is characterized in that the invention comprises 60-80wt percent of corundum and/or porzite and/or Al2O3 larger than or equal to 80 percent of bauxite clinker, 5-10wt percent less than or equal to4 micron of alumina micro-powder, 6-15wt percent less than or equal to 0.025mm of chromium corundum fine powder, 2-6wt percent less than or equal to1micron of silicon fine powder, 5-10wt percent of kyanite or andalusite or silimanite, 12-15wt percent of aluminium dihydrogen phosphate or aluminium sulfate wedding agent, and 0.5-3wt percent of calcium aluminate or bauxite cement coagulant. Compared with the prior art, the abrasion-resistant fireproof plastic has the advantages of high compressive strength, good wear-resisting property, high temperature used and strong slag resistance and anti-etching power, thereby greatly prolonging the service life and meeting the use with higher requirements.

Description

technical field [0001] The invention relates to a refractory material, especially a wear-resistant refractory plastic used in high wear-resistant occasions. Background technique [0002] High-temperature parts in industries such as electric power, petrochemical industry, and kiln masonry are strongly eroded by material particles and corrosive gases at high temperatures, so the requirements for wear resistance and corrosion resistance of refractory materials are relatively high. Existing wearable plastics refractory (wearable plastics refractory), such as the power industry standard DL / T777-2001 "Trial Standard for Wearable and Refractory Plastics", is based on wearable materials such as high alumina bauxite clinker, corundum and silicon carbide. Material, plastic with powder or liquid binder, its performance index: wear resistance (900℃×6h) ≤ 8 or 9cm 3 , normal temperature compressive strength Mpa(800℃×3h)≥80, room temperature flexural strength Mpa(800℃×3h)≥15, plasticity ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B14/30C04B14/06C04B22/14C04B22/16C04B7/32
Inventor 钱仲尧周建国俞建中
Owner 江苏国窑科技有限公司
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