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A platform for research: civil engineering, architecture and urbanism
Special castable for large rotary cement kiln and preparation method of special castable
The invention discloses a special castable for a large rotary cement kiln. The special castable is prepared from the following components in parts by weight: 40 to 50 parts of alumen, 15 to 30 parts of mullite aggregate, 15 to 20 parts of andalusite, 5 to 15 parts of aluminum oxide micro powder, 3.4 to 5 parts of silicon micro powder, 6 to 8 parts of calcium aluminate cement, 0.5 to 0.8 part of sodium hexametaphosphate, 0.3 to 0.5 part of explosion-proof fiber, 0.7 to 1.1 parts of Cr2O3 ultrafine micro powder and 0.2 to 0.3 part of bentonite. The finished product disclosed by the invention can generate a micro-expansion effect at a high temperature, weakens a shrinkage phenomenon generated during high-temperature sintering, and is not easy to peel off from a kiln wall during intermittent kiln stopping; and by adding the silica powder, the lattice structure of the Al2O3 and Cr2O3 ultrafine powder solid solution can be subsequently changed, and the apparent porosity of the material can be remarkably reduced, so that the wear resistance and the corrosion resistance are enhanced. Molecular groups of sodium hexametaphosphate are condensed at high temperature and are combined with three-dimensional net-shaped bentonite molecular groups in the raw materials, the bonding effect is effectively achieved, the kiln lining of the rotary kiln is prevented from falling off, abrasion of a high-temperature section and abrasion of a low-temperature section of the rotary kiln are relatively synchronous, and therefore the service life of the kiln lining is prolonged.
本发明公开了一种大型水泥回转窑特种浇注料，包括以下重量份的组分：40‑50份巩土、15‑30份莫来石骨料、15‑20份红柱石、5‑15份氧化铝微粉、3.4‑5份硅微粉、6‑8份铝酸钙水泥、0.5‑0.8份六偏磷酸钠、0.3‑0.5份防爆纤维、0.7‑1.1份Cr2O3超细微粉、0.2‑0.3份膨润土。本发明成品在高温下可以产生微膨胀效应，削弱高温烧结时发生的收缩现象，在进行间歇性停窑时不易从窑壁剥离；硅微粉的加入，后续会改变Al2O3和Cr2O3超细微粉固溶体的晶格结构，可以显著的降低材料的显气孔率，从而增强耐磨性以及耐腐蚀性。在高温下六偏磷酸钠的分子团将缩合，与原料中立体网状的膨润土分子团相结合，有效地起到了粘结的作用，阻止回转窑窑衬脱落，回转窑高温段和低温段磨损相对同步，从而增加了窑衬的使用年限。
Special castable for large rotary cement kiln and preparation method of special castable
The invention discloses a special castable for a large rotary cement kiln. The special castable is prepared from the following components in parts by weight: 40 to 50 parts of alumen, 15 to 30 parts of mullite aggregate, 15 to 20 parts of andalusite, 5 to 15 parts of aluminum oxide micro powder, 3.4 to 5 parts of silicon micro powder, 6 to 8 parts of calcium aluminate cement, 0.5 to 0.8 part of sodium hexametaphosphate, 0.3 to 0.5 part of explosion-proof fiber, 0.7 to 1.1 parts of Cr2O3 ultrafine micro powder and 0.2 to 0.3 part of bentonite. The finished product disclosed by the invention can generate a micro-expansion effect at a high temperature, weakens a shrinkage phenomenon generated during high-temperature sintering, and is not easy to peel off from a kiln wall during intermittent kiln stopping; and by adding the silica powder, the lattice structure of the Al2O3 and Cr2O3 ultrafine powder solid solution can be subsequently changed, and the apparent porosity of the material can be remarkably reduced, so that the wear resistance and the corrosion resistance are enhanced. Molecular groups of sodium hexametaphosphate are condensed at high temperature and are combined with three-dimensional net-shaped bentonite molecular groups in the raw materials, the bonding effect is effectively achieved, the kiln lining of the rotary kiln is prevented from falling off, abrasion of a high-temperature section and abrasion of a low-temperature section of the rotary kiln are relatively synchronous, and therefore the service life of the kiln lining is prolonged.
本发明公开了一种大型水泥回转窑特种浇注料，包括以下重量份的组分：40‑50份巩土、15‑30份莫来石骨料、15‑20份红柱石、5‑15份氧化铝微粉、3.4‑5份硅微粉、6‑8份铝酸钙水泥、0.5‑0.8份六偏磷酸钠、0.3‑0.5份防爆纤维、0.7‑1.1份Cr2O3超细微粉、0.2‑0.3份膨润土。本发明成品在高温下可以产生微膨胀效应，削弱高温烧结时发生的收缩现象，在进行间歇性停窑时不易从窑壁剥离；硅微粉的加入，后续会改变Al2O3和Cr2O3超细微粉固溶体的晶格结构，可以显著的降低材料的显气孔率，从而增强耐磨性以及耐腐蚀性。在高温下六偏磷酸钠的分子团将缩合，与原料中立体网状的膨润土分子团相结合，有效地起到了粘结的作用，阻止回转窑窑衬脱落，回转窑高温段和低温段磨损相对同步，从而增加了窑衬的使用年限。
Special castable for large rotary cement kiln and preparation method of special castable
一种大型水泥回转窑特种浇注料及其制备方法
LI HOUQIANG (author) / TIAN GUANGRONG (author) / LI XIAOHU (author)
2024-03-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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