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Casting-time-controllable anorthite lightweight refractory material and preparation method thereof

A light-weight refractory material and anorthite technology, applied in the field of refractory materials, can solve the problems of uncontrollable setting time of pouring slurry, affecting the production efficiency of thermal insulation effect of products, etc.

Active Publication Date: 2022-03-18
山东鲁阳浩特高技术纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional anorthite refractory materials (especially refractory bricks) preparation process is easily affected by environmental temperature, stirring time and other factors, making anorthite refractory materials (especially It is a refractory brick) The solidification time of the pouring slurry during the molding process is uncontrollable, and the early solidification during the pouring molding process affects the pouring (that is, the pouring material has already solidified in the pouring hopper before the pouring is completed), which in turn affects the thermal insulation effect of the product and production efficiency

Method used

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Examples

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Effect test

preparation example Construction

[0022] The invention provides a method for preparing an anorthite lightweight refractory material with controllable pouring time, comprising the following steps:

[0023] A) After ball milling 48-55wt% coal gangue, 4-8wt% pyrophyllite and 3-6% kyanite, add 0.01-0.04wt% retarder to the ball-milling slurry and stir for 3-6min , to obtain ball mill slurry;

[0024] The retarder comprises sodium polyphosphate;

[0025] B) Stirring the ball mill slurry, 12-16wt% refractory clay and 15-20wt% calcium carbonate for 5-8min to obtain the main ingredient mixture;

[0026] C) Add 3-6wt% high-alumina cement to the main material mixture, stir for 7-10 minutes, then add 1-5wt% foaming agent, stir for 30-45s to obtain a castable;

[0027] D) Casting the castable, drying and roasting sequentially after demoulding to obtain anorthite lightweight refractory material.

[0028] In the present invention, the coal gangue can increase the aluminum content during the roasting process, further incre...

Embodiment 1

[0053] The first step: add ball mill slurry and retarder to the mixer, and stir for 5 minutes;

[0054] Among them, the ball mill slurry includes gangue, pyrophyllite and kyanite, wherein the amount of gangue is 52%, the amount of pyrophyllite is 5%, and the amount of kyanite is 5%; the additional retarder is sodium polyphosphate , its dosage is 0.03%;

[0055] The second step: add refractory clay and calcium carbonate and stir for 6 minutes;

[0056] The refractory clay is Zhangzhou clay, Lushan clay and Suzhou clay, etc., and the dosage is 14%; the dosage of calcium carbonate is 18%;

[0057] Step 3: Add 6% high alumina cement and stir for 8 minutes;

[0058] Step 4: Add 3% foaming agent and stir for 38 seconds;

[0059] Step 5: It takes 18 minutes for pouring and molding, and the solidification time is 2 hours after pouring. The wet blank pouring effect is good, and no large bubbles are generated.

[0060] Step 6: Put the poured material to stand and solidify. The solid...

Embodiment 2

[0067] The first step: add ball mill slurry and retarder to the mixer, and stir for 5 minutes;

[0068] Among them, the ball mill slurry includes gangue, pyrophyllite and kyanite, wherein the amount of gangue is 55%, the amount of pyrophyllite is 5%, and the amount of kyanite is 4%; the additional retarder is sodium polyphosphate , its dosage is 0.03%;

[0069] The second step: add refractory clay and calcium carbonate and stir for 6 minutes;

[0070] The refractory clay is Zhangzhou clay, Lushan clay and Suzhou clay, etc., and its dosage is 14%; the dosage of calcium carbonate is 16%;

[0071] Step 3: Add 6% high alumina cement and stir for 8 minutes;

[0072] Step 4: Add 4% foaming agent and stir for 34 seconds;

[0073] Step 5: It takes 15 minutes for pouring and molding, and the solidification time is 2 hours after pouring. The wet blank pouring effect is good, and no large bubbles are generated.

[0074] Step 6: Put the poured material to stand and solidify. The solid...

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Abstract

According to the casting-time-controllable anorthite lightweight refractory material and the preparation method thereof, the initial setting time of anorthite brick casting slurry is controlled by directly adding the retarder into the slurry, and the initial setting time of the anorthite brick casting slurry is controlled by controlling the time interval from adding of different types of raw materials to casting completion; and the cast blank has better compression strength, and is not easy to crack in the subsequent standing solidification, drying and roasting processes. According to the method, the initial setting time is controllable, the pouring effect is good, the forming qualification rate is high, experimental results show that the anorthite light refractory material prepared through the method is good in bubble uniformity, and the product qualification rate is increased to 89% from 67%.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an anorthite lightweight refractory material with controllable pouring time and a preparation method thereof. Background technique [0002] Anorthite refractory materials (especially refractory bricks) have high porosity, low bulk density, and good thermal insulation performance, and are widely used as thermal insulation filling materials for the space between refractory bricks and cylinders inside various industrial kilns. It is used to reduce the heat loss of the kiln to obtain high energy utilization efficiency. The melting point of anorthite is 1550°C. It has the characteristics of low density, small thermal expansion coefficient, low thermal conductivity, and stable existence in reducing atmosphere. It can partially replace clay, siliceous and high Aluminum refractory materials, and realize energy saving and emission reduction. [0003] The prepara...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B38/10
CPCC04B35/66C04B38/10C04B2235/349C04B2235/3463C04B2235/3208C04B2235/447C04B2235/602C04B2235/606C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9615C04B2235/9607Y02P40/60
Inventor 郭金胜刘超孟凡伟张成贺张成娟唐锋
Owner 山东鲁阳浩特高技术纤维有限公司
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