Method for producing cement clinker by employing phosphorus slag

Abstract

A disclosed method for producing cement clinker by employing phosphorus slag comprises the following steps: (a) crushing rough materials, namely, crushing the rough materials mainly composed of limestone, phosphorus slag, shale, sandstone and iron ore, so as to respectively obtain limestone particle, phosphorus slag particle, shale particle, sandstone particle and iron ore particle; (b) pre-homogenizing the rough materials, namely, performing layered stacking on the various particles obtained in the step (a); (c) preparing raw material; (d) homogenizing the raw material; (e) preheating and decomposing; (f) sintering and obtaining clinker; and (g) grinding the clinker, namely, cooling the sintered clinker, and grinding the clinker to obtain a needed granularity, so as to finish cement production. The method helps to improve the sintering easiness of the raw material, improve the clinker quality, improve the kiln decomposition rate, improve rotary kiln operation ratio, reduce clinker sintering heat consumption and cement comprehensive electricity consumption, increase clinker output, and substantially reduce cement production cost.

Description

technical field [0001] The invention relates to the field of cement production, in particular to a method for realizing cement clinker production by using phosphorus slag. Background technique [0002] Phosphorus slag is the industrial waste slag produced when yellow phosphorus is produced in the yellow phosphorus factory. After being calcined at high temperature, it is discharged for water quenching and quenching. The steel slag discharged during ironmaking in the factory is similar, with a particle size of 2-5mm, a small amount of massive apatite, and the main chemical components of phosphorus slag are SiO2, CaO, and a small amount of Al2O3, Fe2O3, MgO, P2O5, CaF 2 Wait. After the phosphorus slag is water-quenched, the vitreous body content is above 90%, and the main potential mineral composition is pseudo wollastonite (αCaO·SiO2), lancetite (3CaO·2SiO2·CaF2), and when the content of P2O5 in the phosphorus slag is high, There is a small amount of fluorapatite. The long-...

AI Technical Summary

Problems solved by technology

The long-term accumulation of phosphorus slag not only occupies a large amount of land, but also causes serious pollution to the surrounding environment. Therefore, the treatment and utilization of phosphorus slag is a problem that must be solved in the current phosphorus chemical industry

[0003] In recent years, most cement plants use industrial waste slag to mix into cement mainly in the form of admixtures, but few use industrial waste slag to replace part of cement production raw materials, mainly because waste slag pollutes the working environment, ingredients are complex, and on-site Difficult control, large fluctuations in the composition of raw materials, poor clinker quality, etc.; and some manufacturers are eager for quick success when using waste residues. In order to reduce production costs, they use as many as three or four types of waste residues, thinking that this can reduce costs. There are indeed many problems in production, which lead to difficult control of production, poor quality of clinker, etc., and finally give up the utilization of waste residue

Images