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A kind of anti-sulfur alkali corrosion wear-resistant castable for sludge incineration kiln and its preparation process

A technology for sludge incineration and preparation process, applied in the field of castables, can solve problems such as poor sulfur-alkali corrosion resistance, and achieve the effects of good sulfur-alkali corrosion resistance, good overall incineration treatment effect, and not easy to deform and peel.

Active Publication Date: 2022-02-25
长兴兴鹰新型耐火建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the castable in this invention patent has the problem of poor resistance to sulfur and alkali corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A process for preparing a wear-resistant castable for a sludge incineration kiln that resists sulfur-alkali corrosion, comprising the following steps in sequence:

[0038] S1. Add 0.02kg of KH-570 silane coupling agent, 0.1kg of sodium hexametaphosphate, and 2kg of alumina powder to the mixer in sequence, heat to 18°C, mix and stir evenly, and obtain the composite binder, wherein The alumina powder was ground in advance to a particle size of 42 μm.

[0039] S2. Add 0.2 kg of ettringite crystal particles and 0.02 kg of phosphorus-nitrogen intumescent flame retardant to the second mixer, keep the temperature in the mixer at 20°C, mix and stir evenly, and obtain a micro-expansive agent, wherein the calcium Alumite crystal particles are ground in advance to a particle size of 1.0mm.

[0040] S3, add 6kg of high-alumina cement to the micro-expansion agent, raise the temperature to 45°C and keep it warm, and stir evenly to obtain a castable base material. The heating rate is...

Embodiment 2

[0045] A process for preparing a wear-resistant castable for a sludge incineration kiln that resists sulfur-alkali corrosion, comprising the following steps in sequence:

[0046] S1. Add 0.2kg of KH-570 silane coupling agent, 0.2kg of sodium hexametaphosphate, and 3.0kg of alumina powder to the mixer in sequence, heat to 20°C, mix and stir evenly, and obtain the composite binder, in which The alumina powder is ground in advance to a particle size of 55 μm.

[0047] S2. Add 0.5 kg of ettringite crystalline particles and 0.03 kg of phosphorus-nitrogen intumescent flame retardant to the second mixer, keep the temperature in the mixer at 20°C, mix and stir evenly, and obtain a micro-expansive agent, wherein the calcium Alumite crystal particles are ground in advance to a particle size of 3.0 mm.

[0048] S3, add 6.5kg of high-alumina cement to the micro-expansion agent, raise the temperature to 57°C and keep it warm, and stir evenly to obtain a castable base material. The heating...

Embodiment 3

[0053] A process for preparing a wear-resistant castable for a sludge incineration kiln that resists sulfur-alkali corrosion, comprising the following steps in sequence:

[0054] S1. Add 0.2kg of KH-570 silane coupling agent, 0.3kg of sodium hexametaphosphate, and 3.5kg of alumina powder to the mixer in sequence, heat to 30°C, mix and stir evenly, and obtain the composite binder, in which The alumina powder was ground in advance to a particle size of 58 μm.

[0055] S2. Add 0.5 kg of ettringite crystal particles and 0.05 kg of phosphorus-nitrogen intumescent flame retardant to the second mixer, keep the temperature in the mixer at 30°C, mix and stir evenly, and obtain a micro-expansive agent, wherein the calcium Alumite crystal particles are ground in advance to a particle size of 4.0 mm.

[0056] S3, add 7kg of high-alumina cement to the micro-expansion agent, raise the temperature to 55°C and keep it warm, and stir evenly to obtain a castable base material. The heating rate...

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Abstract

The invention belongs to the technical field of castables, and in particular relates to a wear-resistant castable for sludge incineration kilns resistant to sulfur and alkali corrosion, and a preparation process thereof. The invention achieves the effect of effectively preparing the sulfur-alkali corrosion-resistant wear-resistant castable by selecting alkali-resistant and wear-resistant materials, adding a binder and a micro-expansion agent to form a material formula, and combining the preparation process of gradually raising the temperature, heating and stirring. The invention has the advantages of reasonable and effective preparation process, good sulfur-alkali corrosion resistance of the prepared pouring material, difficult deformation and peeling of the pouring material during sludge incineration treatment, good overall incineration treatment effect and long service life.

Description

technical field [0001] The invention belongs to the technical field of castables, and in particular relates to a wear-resistant castable for sludge incineration kilns resistant to sulfur-alkali corrosion and a preparation process thereof. Background technique [0002] Sludge incineration kiln is used to treat all kinds of factory sludge and municipal sludge, and the alkali, halogen and sulfur compounds enriched in the sludge have high corrosion strength and long continuous corrosion time for ordinary wear-resistant castables The problem. [0003] More importantly, during the calcination process of alkali-sulfur compounds, oxidation-reduction conditions are prone to occur, which makes the composition of the refractory lining change frequently, and the volume of the wear-resistant material also frequently expands and shrinks, eventually causing the problem of easy peeling, so there is an urgent need in the market A new type of wear-resistant castable for targeted treatment of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3445C04B2235/3222C04B2235/3217C04B2235/3248C04B2235/3206C04B2235/483C04B2235/447C04B2235/6562C04B2235/6565
Inventor 许高山国强王强
Owner 长兴兴鹰新型耐火建材有限公司
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