阅读说明：本技术 一种低膨胀率抗热震耐侵蚀高强浇注料 (Low-expansion-rate thermal-shock-resistant erosion-resistant high-strength castable ) 是由 焦顺杰 王伟 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种低膨胀率抗热震耐侵蚀高强浇注料,所述浇注料由以下重量百分比的原料制备：3.1~5mm的熔融石英颗粒0.01~28%、1.1~3mm的熔融石英颗粒20~35%、0.01~1mm的熔融石英颗粒10~20%、200目的碳化硅粉10~15%、320目的海泡石粉料1~3%、钇稳定氧化锆3~5%,硅微粉3~8%、金属硅粉1~3%、活性氧化铝微粉4~8%、氧化铍3~5%、硅溶胶8~12%、六偏磷酸钠0.01~0.2%。本发明通过采用熔融石英做骨料,同时添加碳化硅粉、硅微粉、金属硅粉、活性氧化铝微粉、硅溶胶、海泡石粉料、钇稳定氧化锆、氧化铍做结合剂制成浇注料,其制作成的推板的体积密度为1.95g/cm<Sup>3</Sup>,明显降低了推板的体积密度,并且其热震稳定性更高。(The invention discloses a low-expansion-rate thermal shock-resistant erosion-resistant high-strength castable which is prepared from the following raw materials in percentage by weight: 0.01-28% of fused quartz particles with the particle size of 3.1-5 mm, 20-35% of fused quartz particles with the particle size of 1.1-3 mm, 10-20% of fused quartz particles with the particle size of 0.01-1 mm, 10-15% of 200-mesh silicon carbide powder, 1-3% of 320-mesh sepiolite powder, 3-5% of yttrium-stabilized zirconia, 3-8% of silica micropowder, 1-3% of metal silicon powder, 4-8% of active alumina micropowder, 3-5% of beryllium oxide, 8-12% of silica sol and 0.01-0.2% of sodium hexametaphosphate. The invention adopts fused quartz as aggregate, and simultaneously adds silicon carbide powder, silicon micropowder, metal silicon powder, active alumina micropowder, silica sol, sepiolite powder, yttrium stabilized zirconia and beryllium oxide as bonding agent to prepare the castable, and the volume density of the prepared push plate is 1.95g/cm 3 The volume density of the push plate is obviously reduced, and the thermal shock stability of the push plate is higher.)

1. A low expansion rate thermal shock resistant erosion resistant high strength castable is characterized in that: the castable is prepared from the following raw materials in percentage by weight: 0.01-28% of fused quartz particles with the particle size of 3.1-5 mm, 20-35% of fused quartz particles with the particle size of 1.1-3 mm, 10-20% of fused quartz particles with the particle size of 0.01-1 mm, 10-15% of 200-mesh silicon carbide powder, 1-3% of 320-mesh sepiolite powder, 3-5% of yttrium-stabilized zirconia, 3-8% of silica micropowder, 1-3% of metal silicon powder, 4-8% of active alumina micropowder, 3-5% of beryllium oxide, 8-12% of silica sol and 0.01-0.2% of sodium hexametaphosphate.

2. The low-expansion-rate thermal shock-resistant erosion-resistant high-strength castable material as claimed in claim 1, wherein: the castable is prepared from the following raw materials in percentage by weight: 15% of fused quartz particles with the particle size of 3.5-4.5 mm, 25% of fused quartz particles with the particle size of 1.5-2.5 mm, 15% of fused quartz particles with the particle size of 0.05-1 mm, 12% of 200-mesh silicon carbide powder, 2% of 320-mesh sepiolite powder, 4% of yttrium-stabilized zirconia, 5% of silicon micropowder, 2% of metal silicon powder, 5% of activated alumina micropowder, 5% of beryllium oxide, 9.9% of silica sol and 0.1% of sodium hexametaphosphate.

Technical Field

The invention relates to the field of pushed slab kilns, in particular to a low-expansion-rate thermal shock-resistant erosion-resistant high-strength castable.

Background

The pushed slab kiln is a flame-proof firing kiln, and is mainly used for firing light bricks, S tiles for buildings, glass tiles and other articles. The push plate is the main kiln furniture of the push plate kiln, is mainly used for bearing the baked articles to enter and exit the push plate kiln, and plays a vital role in the push plate kiln. The temperature is higher in the kiln burning process, and the push plate needs to resist high temperature and bear the weight of a product and the huge pressure of a propeller. The push pedal is pour by the pouring material and is formed, and the push pedal divide into according to the material: clayey, high alumina, cordierite-mullite, clay silicon carbide, silicon nitride combined silicon carbide. The clay push plate is generally a fired product, and the push plate made of the material is gradually eliminated due to environmental protection factors; the high-aluminum push plate is generally a prefabricated push plate, and the push plate is heavy, high in heat storage, poor in thermal stability and poor in use effect; the push plate made of materials such as cordierite-mullite, clay silicon carbide and silicon nitride combined silicon carbide belongs to a high-grade push plate, is mainly used for firing products such as ceramics, and has a good use effect, but the cost is too high, so that the market popularization is not facilitated, and therefore, a push plate castable with good thermal stability and low production cost needs to be researched to meet the market demand.

Disclosure of Invention

The invention aims to solve the problems and provides a low-expansion-rate thermal shock-resistant erosion-resistant high-strength castable with higher thermal shock stability.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the low-expansion-rate thermal shock-resistant erosion-resistant high-strength castable is prepared from the following raw materials in percentage by weight: 0.01-28% of fused quartz particles with the particle size of 3.1-5 mm, 20-35% of fused quartz particles with the particle size of 1.1-3 mm, 10-20% of fused quartz particles with the particle size of 0.01-1 mm, 10-15% of 200-mesh silicon carbide powder, 1-3% of 320-mesh sepiolite powder, 3-5% of yttrium-stabilized zirconia, 3-8% of silica micropowder, 1-3% of metal silicon powder, 4-8% of active alumina micropowder, 3-5% of beryllium oxide, 8-12% of silica sol and 0.01-0.2% of sodium hexametaphosphate.

Further, the castable is prepared from the following raw materials in percentage by weight: 15% of fused quartz particles with the particle size of 3.5-4.5 mm, 25% of fused quartz particles with the particle size of 1.5-2.5 mm, 15% of fused quartz particles with the particle size of 0.05-1 mm, 12% of 200-mesh silicon carbide powder, 2% of 320-mesh sepiolite powder, 4% of yttrium-stabilized zirconia, 5% of silicon micropowder, 2% of metal silicon powder, 5% of activated alumina micropowder, 5% of beryllium oxide, 9.9% of silica sol and 0.1% of sodium hexametaphosphate.

Compared with the prior art, the invention has the advantages and positive effects that:

the invention adopts fused quartz as main raw material to prepare the casting material, and the fused quartz is prepared by using natural high-purity silicon dioxide through an electric furnaceMelting at a temperature above 1760 ℃ and then rapidly cooling, wherein the crystalline silicon dioxide is converted into an amorphous glass melt in the process. The melting temperature of the fused quartz is about 1713 ℃, the content of silicon dioxide is not less than 99.5 percent, the content of crystalline quartz is not more than 0.5 percent, and the true specific gravity of the fused quartz is 2.21g/cm³The Mohs hardness is 7.0, the thermal conductivity is low, the heat capacity is small, and the thermal expansion coefficient of 0-1200 ℃ is 5 × 10-7/DEG C, which is the minimum of all refractory materials, so that the thermal shock resistant material has extremely high thermal shock stability.

The invention adopts fused quartz with different grain diameters as aggregate, and simultaneously adds silicon carbide powder, silicon micropowder, metal silicon powder, active alumina micropowder, silica sol, sepiolite powder, yttrium-stabilized zirconia and beryllium oxide as bonding agent to prepare the castable, and the volume density of the prepared push plate is 1.95g/cm³The volume density of the push plate is obviously reduced, the manufactured push plate has low hot melting, the heat loss of a heating system of the push plate furnace can be reduced, and the thermal expansion coefficient of the push plate furnace is the lowest value in the currently used materials, so that the thermal shock stability of the push plate furnace is higher; on the other hand, the cost of the fused quartz is relatively lower than that of materials such as cordierite-mullite, silicon carbide and the like, so that the production cost of the push plate is effectively reduced, and the market popularization prospect is very large.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art without any creative effort, should be included in the protection scope of the present invention.