Clay refractory castable ceramic castable

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Clay refractory castable ceramic castable

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Clay refractory castable ceramic castable

Clay refractory castable is mainly composed of binder, refractory aggregate, powder and admixture.The chemical composition, physical properties and fire resistance of refractory castable clay are different due to its different producing areas.

Softening temperature under load

Items		YNNT1350	YNNT1400	YNNT1450	YNNT1500
use tem./C AL2O3/% volume density/g.cm3 pressive strength/MPa		1350 42～55 2.2～2.3 2～3	1400 55～62 2.25～2.30 2.5～5.0	1450 60～66 2.30～2.40 4～8	1500 62～76 2.35～2.45 2～4
bending strength room tem./MPa	100 C,3h 1000 C,3h 1400 C,3h	0.3～0.7 4～6 7～9	0.4～1.0 5～7 7～12	0.8～1.2 8～12 10～17	1.0～1.4 8～12 10～12
Thermal buckling strength/MPa	1000 C,1h 1400 C,1h	4～6 0.3～0.6	6～8 0.5～1.0	8～10 0.8～1.3	8～10 1.2～1.5
line changes/%	1400 C	0～+0.7	0～+0.8	0～+0.4	0～+0.1
4%	>1480	>1500	>1530	>1530
thermal conductivity /W.(m.k)-1	500 C	>0.6	>0.6	>0.7	>0.7

A.Inspection of castable before construction:

(1) check the surface and cleaning condition of the pouring equipment to be finished, and require the construction surface to be cleaned.

(2) check the good condition of construction machinery and tools. Stirring and vibrating tools must have good spare parts.

(3) check the shape, size, arrangement and welding quality of the anchoring parts. The metal anchoring parts must be compensated for expansion (coated with asphalt or other measures).

(4) check the surrounding firebrick lining and heat insulation layer to prevent the loss of water from pouring materials.

(5) check the packaging and delivery date of the castable, and conduct pre-test to check whether it fails.

(6) to check the construction water, the water quality must meet the drinking water standard.

If the above items fail to meet the inspection standards, the construction shall be carried out after they pass the inspection. The expired and invalid castable materials shall not be used. During the construction of castable materials, the power shall not be cut off and the construction shall not be interrupted.

2.Precautions during construction:

(1) template: castable construction USES template to be able to use steel plate or hardwood plate (5 laminate) make, template should have enough intensity, rigidity is good, do not go out of shape, do not shift, do not leak pulp, just template wants besmear demultiform agent, wood template wants besmear waterproof agent, the template that USES repeatedly wants to clean first, besmear lacquer just can use.Check hole and clean hole to make regular shell with wood.There shall be more than 4 metal drawbars per square meter to support the board (to prevent strong heat transfer) and the drawbars shall be welded on the anchor (that is, the formwork drawbars shall be welded on the anchor).

(2) water-cement ratio: the amount of water added for stirring castable shall be controlled strictly in accordance with the instructions, and shall not exceed the limit. On the premise of ensuring the construction performance, the amount of water added shall be less but not more.

(3) stirring: the stirring time of the pouring material shall not be less than 5 minutes (subject to the requirements of the manual), and a forced mixer shall be used for operation.Stir dry mix stir, and then add 80% of the amount of water stir, and then according to its dry and wet degree, slowly add the remaining water continue to stir, until the appropriate level of work.Mix the different castable materials to clean the mixer.

(4) use of pouring material: pouring material must be used in the whole bucket and bag. Generally, the stirred pouring material must be used up within 30 minutes. In the high temperature and dry working environment, the time should be shortened appropriately.

(5) vibration: pouring pouring material into the mold frame shall be immediately stratified with a vibration bar, the height of each layer shall not be more than 300mm, and the vibration interval shall be about 250mm.During vibration, the anchoring parts should be avoided as far as possible, the insulation layer should not be damaged, and the vibration or revitalization should not be in the same position for a long time. After the grouting of the pouring material surface, the vibration bar should be pulled out slowly, so as to avoid segregation and cavity of the pouring material layer.

(6) : large area construction in large area construction process, to block construction, each pouring areas to about 1.5 m2 suitable, this expansion joints according to design requirements, shall not be omitted, expansion joint should be located in the intermediate position of the anchoring pieces of interval, expansion joint can use 6 ~ 8 mm thick boards, the cross section of the board from the distance of the template should be 40 ~ 60 mm, inflated with boards should be fixed, effectively prevent the translocation in castable construction process.

(7) welding of anchorage parts: draw grid lines on the work surface (in accordance with the requirements of the drawings), and weld the anchorage parts at the junction of grid lines. The root of the anchorage parts shall be fully welded.

After the completion of the construction of the castable, the castable body shall not be subjected to pressure or shock before solidification.

3.Maintenance inspection of construction:

(1) after the surface of castable is dry, cover the exposed parts in the air with plastic film or straw bag immediately. After the initial setting is reached, water shall be sprayed and maintained regularly to keep the surface moist. The maintenance time shall be at least two days, and water shall be sprayed frequently on the first day.After the final setting of pouring material, the template can be removed and continued to be sprayed with water for curing. However, the load-bearing template cannot be removed until its strength reaches 70%.

(2) after the removal of the formwork, check the pouring body in time, and deal with and repair the quality problems such as honeycomb, peeling and cavity in time. When the problem is serious, chisel away the defective parts to expose the anchoring parts, and then fill them with tamping materials of the same quality for compaction and continued maintenance. It is forbidden to cover up the problem with cement mortar.

Four.Inspection and acceptance of castable construction:

1.During the construction of castable, a group of test blocks should be reserved for every 20m2 of engineering quantity, so as to check the main performance such as its strength.

2.All covered concealed works shall not be allowed to enter the next procedure until the concealed works have been accepted. The inspection items are as follows:

(1) heat insulation layer and anchor bricks, formwork, etc. (check at any time)

(2) anchoring elements and anchoring devices

(3) anti-water loss measures

(4) embedded facilities

3.After the completion of the itemized works, intermediate work acceptance shall be carried out. The inspection items are as follows:

(1) outside dimensions, lining thickness and center line of masonry

(2) material usage

(3) expansion joints, brick joints, levelness, perpendicularity and surface flatness

(4) construction of process facilities and process holes

(5) appearance inspe

Zibo Yuneng Kiln Technology Co.,Ltd. is the professional Clay refractory castable ceramic castable manufacturer in Shandong。Our company Clay refractory castable ceramic castable sincerely obtains the prestige，rewards our customers with the preferential price of Clay refractory castable ceramic castable and warm service。Our main products:refractory castable，high strength castable，alumina silicate fiber module，alumina silicate felt，alumina silicate fiber blanket，alumina silicate cotton，etc。The products sell well in dozens of metallurgical，chemical and electric power enterprises all over the country and are well received by users。The company's unique production process，quality management and testing equipment to ensure product quality and stability，has a high-quality staff and professional and technical personnel，according to the different requirements of users，the development and design of a variety of new refractory materials。To know the latest Clay refractory castable ceramic castable price can be posted on our website https://www.zbyuneng.cn，we will contact you within 24 hours，Tel: 13864463333 Manager Sun。

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