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Composite bend steel tube of internal lining integral ceramic and preparation technology thereof

A one-piece, ceramic technology, applied in the field of composite curved steel pipe and its preparation, to achieve high wear resistance, long service life, and reduce material costs

Inactive Publication Date: 2009-06-17
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no relevant report on the composite curved steel pipe lined with integrally formed ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A. Take by weighing 8200 grams of alumina, 400 grams of barium carbonate, 300 grams of whiskers, 400 grams of talc, 500 grams of Suzhou soil and 200 grams of chromium oxide according to the proportioning requirements;

[0037] B, above-mentioned ceramic powder is added ball mill in ball mill 20h, material: ball stone: water=1:2:1, and remove iron after crossing 250 mesh sieves, obtain ceramic slurry 20000 grams;

[0038] C, dehydrating the ceramic slurry prepared in the above step B through a mud squeezer to obtain 12500 grams of mud cake;

[0039] D. Put the mud cake in step C into the mud refining machine for vacuum mud refining, and stale for 48-60 hours to obtain 10,000 grams of stale mud;

[0040] E. Put the stale mud section obtained in step D into a pipe extruder and extrude to obtain an integrally formed ceramic bend

[0041] Take 2 wet green bodies, dry in the shade for 48 hours, and then put them in an oven at 60°C-120°C for 12 hours to get

[0042] 2 integr...

Embodiment 2

[0046] A. Weigh 8200 grams of alumina, 400 grams of barium carbonate, 300 grams of whiskers, 400 grams of talc, 500 grams of Suzhou soil and 200 grams of chromium oxide according to the proportioning requirements;

[0047] B, the ceramic raw material in A step is added in ball mill and carry out ball milling, material: ball stone: water=1:2:0.6, ball milling time 20 hours, and remove iron after crossing 250 mesh sieves, obtain ceramic slurry 16000 grams;

[0048] C. Inject the ceramic slurry in step B into the plaster mold, and after standing for 30 minutes, pour out the excess slurry, and then leave it for 4 hours to obtain a wet green body of an integrally formed ceramic elbow;

[0049] D. Take out the wet green body of the integrally formed ceramic elbow in the plaster mold in step C, and put it in a 60°C-120°C oven to dry for 12 hours to obtain 2 dry green bodies of the integrally formed ceramic elbow;

[0050] E. The dry green body of the integrally formed ceramic elbow o...

Embodiment 3

[0053] 1. Weigh and weigh 9000 grams of alumina, 300 grams of barium carbonate, 300 grams of whiskers, 100 grams of talc, 100 grams of Suzhou soil and 200 grams of chromium oxide, and prepare ingredients according to the proportion;

[0054]2. Put the powder in step 1 into a ball mill and mill for 20 hours, material: ball stone: water=1:2:1, and remove iron after passing through a 250 mesh sieve to obtain 20,000 grams of ceramic slurry;

[0055] 3. Dehydrate the above ceramic slurry through a mud press to obtain 12500 grams of mud cake;

[0056] 4. Vacuum-mix the mud cake in step 3 in a mud mixer, and stale for 48 hours to obtain a stale mud segment;

[0057] 5. Extrude the stale mud section obtained in step 4 through a pipe extruder to obtain 2 integrally formed ceramic elbow wet green bodies, and dry them in the shade for 48 hours, then put them in an oven at 100°C and dry them for 12 hours to obtain integrally formed ceramics 2 bent pipe dry green bodies;

[0058] 6. Put ...

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Abstract

The invention aims to provide a composite bending steel pipe lined with integrated ceramic and preparation technology thereof. The steel pipe adopts the following formula: 70 to 90 percent of alumina, 3 to 7 percent of barium carbonate, 3 to 5 percent of crystal whisker, 1 to 8 percent of talcum, 1 to 5 percent of Suzhou clay, and 2 to 5 percent of chromium oxide. Working procedures such as material distribution, ball milling, squeezing, vacuum pugging, molding, sintering and compounding can be adopted. The wear resistance of the composite bending steel pipe is 5 to 6 times of that of a patch ceramic bending pipe and is 10 to 20 times of that of a high-chromium cast iron bending steel pipe, the wear loss is less than or equal to 0.015 percent, the water absorbing capacity is less than 0.02 percent, the Mohs hardness is between 8 and 9, and the composite bending steel pipe can bear the high temperature of 800 DEG C for a long time, is acid-resistant and alkali-resistant, and has the service life of between 12 and 18 years.

Description

technical field [0001] The invention relates to a composite curved steel pipe lined with integrally formed ceramics and a preparation method thereof. Background technique [0002] Wear-resistant elbows are widely used in mining, metallurgy, chemical industry, electric power and concrete transportation industries. The steel pipes are often lined with composite materials such as cast stone, alloy steel, patch ceramics and rubber. Due to the limited wear resistance of cast stone, alloy steel and rubber, most of the composite curved steel pipes with ceramic tiles are now used. Its wear resistance, at the same time, the ceramic patch is directly pasted on the steel pipe with inorganic glue or pasted on the rubber with ceramics, and then the rubber is compounded with the steel pipe through vulcanization technology, which often causes the patch to fall off due to the failure of the inorganic glue, which also affects In order to improve the wear resistance of curved steel pipes, in...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B37/02
Inventor 伍协周治德李桂银张晓
Owner HUNAN UNIV
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