Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for producing cement and cement kiln dust simultaneously through potassium feldspar
The invention discloses a method for producing cement and cement kiln dust simultaneously through potassium feldspar. The method comprises the following steps that limestone, sandstone, potassium feldspar, iron powder and a fluorite additive are crushed and then mixed, wherein the mixture comprises, by weight, 72-77% of limestone, 17-20% of potassium feldspar, 2-6% of sandstone, 2-4% of iron ore and 1-2% of fluorite additive, and the sum of the percentages of all the components is 100%; the mixed raw materials are ground into raw materials with the granularity of 0.08-0.10 mm; the raw materials are evenly mixed and then fed into a kiln system, high-sulphur coal is adopted as fuel, and preheating, decomposition, calcination and cooling are carried out to obtain cement clinker; in the calcination process, K2O in the potassium feldspar is volatilized and compounded with SO2 and CO2 in high-sulfur coal soot to form K2SO4 and K2CO3 at first and then form potassium metasilicate and potassium aluminate to be concentrated in a kiln along with soot; kiln dust containing potassium is recycled through an efficient recycling device and processed into potassic fertilizer.
Method for producing cement and cement kiln dust simultaneously through potassium feldspar
The invention discloses a method for producing cement and cement kiln dust simultaneously through potassium feldspar. The method comprises the following steps that limestone, sandstone, potassium feldspar, iron powder and a fluorite additive are crushed and then mixed, wherein the mixture comprises, by weight, 72-77% of limestone, 17-20% of potassium feldspar, 2-6% of sandstone, 2-4% of iron ore and 1-2% of fluorite additive, and the sum of the percentages of all the components is 100%; the mixed raw materials are ground into raw materials with the granularity of 0.08-0.10 mm; the raw materials are evenly mixed and then fed into a kiln system, high-sulphur coal is adopted as fuel, and preheating, decomposition, calcination and cooling are carried out to obtain cement clinker; in the calcination process, K2O in the potassium feldspar is volatilized and compounded with SO2 and CO2 in high-sulfur coal soot to form K2SO4 and K2CO3 at first and then form potassium metasilicate and potassium aluminate to be concentrated in a kiln along with soot; kiln dust containing potassium is recycled through an efficient recycling device and processed into potassic fertilizer.
Method for producing cement and cement kiln dust simultaneously through potassium feldspar
SUN QIONGKE (Autor:in)
10.02.2016
Patent
Elektronische Ressource
Englisch
Process for producing potassium carbonate co-production cement through potassium feldspar
| Europäisches Patentamt | 2015
British Library Online Contents | 1995
Online Contents | 1995
| British Library Online Contents | 2018
| British Library Online Contents | 1995