The work efficiency that improves kiln furnace and dropping hear rate and one of important step that reduce oneself quality is to use light simple fireproof stuff to replace heavy simple fireproof stuff to build kiln lining. Light qualitative silica brick belongs to firebrick of silicon qualitative heat insolation, light qualitative silica brick basically is used at the kiln furnace such as kiln of Jiao Lu, hot-blast stove, glass heat-insulation layer and requirement heat insolation or reduce self-prossessed and as not direct as melt content contact, do not suffer aggressivity gas effect, do not suffer temperature the kiln of leap furnace each place. Use below high temperature, cannot contact with alkalescent and fireproof material.
Light qualitative silica brick uses finely silica to make raw material normally, combustible substance is added in burden or use aeriform happening law to form poriferous structure, classics is firing and make, also can make do not burn goods.
The article is used broken the grog of useless silica brick after is raw material, preparation pledges gently in silica brick process, certain burning is added to the middle of raw material when batch mixing lost property, be like sawdust, coal fines, coke or a few complex matter, these burn lost property to be in firing in the process burn easily break volatilize, be helpful for raising the porosity of goods thereby, reduce bulk density, reduce heat conduction performance, increase to pledge the brick is using effect of the heat insolation of the process, heat preservation gently. When the grog of useless silica brick that the article studied to using critical granuality 2.18mm develops light qualitative silica brick in join burn the influence that loses an agent to be brought to goods differently.
1 sample preparation
For resource conservation, protect an environment, the article chooses critical granuality 2. useless brick grog serves as raw material. Basis before experience, choose anthracitic pink, XW pink of complex matter, coke wait for those who serve as light qualitative silica brick to burn lost property to undertake additive fill test respectively.
Pug mixes refine to use 400kg to take muller to mix refine machine to mix refine, when mixing refine, expect grain to be joined after accurate metage first wet grind refine is mixed in machine, join bond, additive to mix refine 10min, join burn lost property to mix refine 20min to go out makings, enter hopper to expect tiredly to shape after 2h. Shape equipment uses 260t attrition to press bricky machine suppress to shape, this press punch is smooth, pressure moderate, use desiccator of infrared electric heat to undertake to goods dry, can improve dry efficiency and reduce adobe to pollute, the dry temperature set of goods is 150 ℃ , wait for actual condition to adjust adobe again according to the appearance of adobe, size, sheet again time of dry heat preservation, press specific firing temperature curve follows channel kiln firing. Development goes add different the light qualitative silica brick that burns lost property.
2 results and discuss
2.1 it is with coal fines burn lost property
This experiment serves as coal fines onefold burn lost property to have a test, after through changing coal fines and 2.18mm at the same time useless brick grog joins a quantity to undertake course of true proved recipe mixes refine to expect tiredly, via attrition suppress of the machine that press a brick shapes, the symbol that make a brick is mark brick, follow channel kiln firing.
It is respectively add to the middle of grog of 2.18mm useless brick, the experiment of 32% , 36% , 40% smokeless coal fines is firing exterior photograph. Can see, add the addition of the quantity as anthracitic pink, brick exterior is more and more inattentive, each recipe makes the adobe after the brick is firing all have flying horn and flying arris appearance. Visible, adding onefold and smokeless coal fines to the middle of grog of useless silica brick is unworkable, and anthracitic pink adds a quantity to should be controlled in 28% less than.
2.2 it is with coke burn lost property
This experiment serves as coke onefold burn lost property to have a test, add a capacity through changing coke, with 2.18mm useless brick grain joins a quantity to mix have a test.
After expecting tiredly through mixing refine, via attrition suppress of the machine that press a brick shapes, the symbol that make a brick is mark brick, follow channel kiln firing.
The coke that adds a capacity likewise and anthracitic quite, the unfired brick that adds coke is more incidental burn the phenomenal; that fly to be in shape process, the makings that adds coke shapes harder.
2.3 with new-style accretion XW is burn lost property
This experiment chose a kind new-style the inserts that contains SiO2 serves as burn lost property, particular trial method and add anthracitic pink and the experimental method that add coke to agree, add a quantity to be 28% certainly, along with channel kiln firing, can see, add the product of XW, the outward appearance is better, goods flash phenomenon was not added other when burning lost property serious.
Subsequently the specific provision according to smelt metal mark, examine the silicon that adds XW place to be made is intensity of compression of the bulk density of qualitative light qualitative adiabatic brick, normal temperature, heavy the index such as temperature of bate of loading of the change that burn a line, 0.1MPa, coefficient of thermal conductivity, content undertakes detecting, accord with national level.
3 conclusion
(1) burns pink of lost property, coke to wait to anthracitic pink, XW as use production of useless brick grog to pledge gently of silica brick burn lost property to undertake additive fill test respectively, development gives finished product light qualitative silica brick, pass the comparative analysis of pair of test results, eventually with compound burn lost property XW to mix additive kind to introduce, can decrease apparently firing when phenomenon of goods flash flying arris, improve the exterior quality of the product.
(2) produces light qualitative silica brick, the sort that burns lost property should choose not only reasonable, its add a capacity reasonable also, cross the adiabatic effect that low short of needs, exorbitant and easy create product loose.
Zhengzhou flourish fills the fireproof material that serves as major to produce manufacturer, we have rich kiln to furnace is built and transform experience, if you have pertinent question and demand but department of market of our Rong Cheng has the incoming message seek advice, we can act on cordial attitude of attending to guests to offer professional conduit solution to you.
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