CN1562893A - Method for fabricating door brick in coke furnace - Google Patents

Abstract

The prodn. steps are: raw material with fixed size is matched according to fixed matching ratio and is weighed according to fixed matching ratio then is send into puddle mixer to be sturred 2-3 minutes by adding water, the mixed material is send into model with fixed size to be vibrated 2-3 minutes by vibrostand or vibrating stick to make injected material compacted; the material is natural maintained in proper time in the model, remaintained 3 days after form stripping, dried 7 days in drying room, then is used into kln to be fired 3 hours in temp. 1300 deg.C to produce the end product, thickness of the brick is more than 200 mm, evenly reach to 1200-1500 mm.

Description

A kind of coke oven door brick producing process

Technical field

The present invention relates to a kind of refractory materials, specifically is a kind of manufacture method of coke oven door brick.

Background technology

Existing coke oven door brick is generally clay matter, clay-cordierite, alumina-cordierite or mullite-cordierite matter, but the machine that is is pressed calculon, and the length dimension of brick and width dimensions are generally 500mm * 450mm by the size decision of firedoor hole; And the thickness of brick, owing to adopt mechanical pressing, and can not be too thick, be generally about 120mm.If the thickness of brick is increased to more than the 200mm, then because brick is too thick, make the middle part of brick be difficult for densification, intensity is lower, and result of use is bad.This kind pressed machine brick makes the brickwork joint of fire door many owing to brick is little, fire door easily damages from brickwork joint, causes oven door sealing not tight, and flue gas scatters, contaminate environment, and the easy oxidation of fire door place coke, strength degradation; Fire door is shorter work-ing life simultaneously, has increased labor strength and cost.

Summary of the invention

The present invention takes a kind of mould material technology (vibrating casting or gravity flow pouring) to make furnace door brick for improving coke oven door stopping property and work-ing life.

In order to reach above-mentioned purpose of dealing with problems, technical scheme of the present invention is:

A kind of coke oven door brick producing process is characterized in that comprising the steps:

(1) raw material of set specification is prepared burden according to set proportioning;

(2) press the laggard stirrer of proportion speed weighing, add water and stir.Stir and pour in the model of certain specification after 5 minutes, vibrate 2-3 minute, make mould material closely knit with shaking table or vibrating head;

(3) in model behind the natural curing certain hour, form removal maintenance 3 days again with dry 7 days of kiln, waits to parch the back kiln-firing, and firing temperature 1300 ℃ * 3 hours promptly can be made into finished product.

Its main raw material and proportioning are:

Raw material types	Mullite		Trichroite	Calcining Al 2O 3Micro mist	Silicon powder	Alundum cement	Tripoly phosphate sodium STPP (adding)
								5-0mm	Fine powder	5-0mm
	Add-on %	30	21								35	3	??4	??7	????0.3

The invention has the advantages that: owing to adopt mould material technology, therefore can make syphon, the furnace door brick size is become big,, significantly reduce the quantity of mud seam as 500mm * 450mm * 120mm brick is enlarged into 500mm * 450mm * 1200mm.The thickness of the application brick of this kind technology can be greater than 200mm, even reaches 1200-1500mm, has improved the stopping property of coke oven door like this, prevents that flue gas from scattering, and improves environment, improves the coke quality simultaneously, has also prolonged fire door work-ing life.

Embodiment

Be that example illustrates embodiments of the invention with mullite-cordierite matter mould material below.Use following raw materials according: mullite (natural or synthetic), trichroite, calcining Al ₂O ₃Micro mist (less than 5 μ m), silicon powder, alundum cement, water reducer, the main raw material performance is as follows:

Material name	SiO 2	?Al 2O 3	?Fe 2O 3	?CaO	?MgO	?K 2O	?Na 2O	?TiO 2	Body close (g/Cm3)	Water-intake rate %
											Mullite	38.04	?58.48	?1.18	?0.273	?0.233	?0.048	?0.028	?1.56	?2.76	?0.9
Trichroite	50.92	?34.08	?1.63	?0.45	?10.74	?0.127	?0.481	?1.44	?1.97	?11.73
											Calcining Al 2O 3Micro mist		?99.23
Silicon powder	92.14
											Alundum cement		?75.43		?23.84

Water reducer can use inorganic (as tripoly phosphate sodium STPP) or organic (as NNO).

With broken pulverizing of mullite is less than 5mm, and wherein part goal mill mill is less than the 0.088mm fine powder;

With broken pulverizing of trichroite is less than 5mm.All the other raw materials are fine powder.Prepare burden by following proportioning:

Raw material types	Mullite		Trichroite	Calcining Al 2O 3Micro mist	Silicon powder	Alundum cement	Tripoly phosphate sodium STPP (adding)
								??5-0mm	Fine powder	??5-0mm
	Add-on %	??30	??21								??35	3	??4	??7	????0.3

To go up each material of table by the laggard stirrer of proportion speed weighing, add water 10%, stir 5 minutes,, vibrate 2-3 minute, and make mould material closely knit with shaking table or vibrating head to going in 500mm * 450mm * 1200 models.Natural curing is after 12 hours in model, form removal, and natural curing is 3 days again, with dry 7 days of kiln, goes into klining after waiting to parch, firing temperature 1300 ℃ * 3 hours.Promptly can be made into finished product.

Claims (2)

1, a kind of coke oven door brick producing process is characterized in that comprising the steps:

(1) raw material of set specification is prepared burden according to set proportioning;

(2) press the laggard stirrer of proportion speed weighing, add water and stir.Stir and pour in the model of certain specification after 5 minutes, vibrate 2-3 minute, make mould material closely knit with shaking table or vibrating head;

(3) in model behind the natural curing certain hour, form removal maintenance 3 days again with dry 7 days of kiln, waits to parch the back kiln-firing, and firing temperature 1300 ℃ * 3 hours promptly can be made into finished product.

2, manufacture method as claimed in claim 1 is characterized in that its main raw material and proportioning are: Raw material types Mullite Trichroite Calcining Al ₂O ₃Micro mist Silicon powder Alundum cement Tripoly phosphate sodium STPP (adding) ?5-0mm Fine powder ????5-0mm Add-on % ?30 ??21 ????35 ????3 ??4 ????7 ????0.3