Silicate cement clinker and preparation method thereof

Abstract

The invention discloses silicate cement clinker and a preparation method thereof, and relates to the technical field of preparation of cement. The silicate cement clinker prepared by the invention isprepared from the following raw materials in percentage by weight: 42-72% of limestone as a calcium material, 1-20% of a silicon material, 10-40% of a supplement calcium material, 0-5% of an iron material, and 3-15% of an iron-aluminium material. The supplement calcium material is limestone moulding sand waste. According to the invention, the limestone moulding sand waste is applied to the cementclinker, so that cost of the enterprises can be reduced; waste can be changed into things of value; and great social benefits and economic benefits are achieved for society and the enterprises.

Description

technical field [0001] The present invention relates to the technical field of cement manufacture, and more specifically relates to a Portland cement clinker and a preparation method thereof. Background technique [0002] Limestone molding sand is an important mold for casting molding in the foundry industry. It is made by mixing raw sand, binder and water in a certain proportion, and sometimes adding auxiliary materials such as coal powder or wood chips. According to statistics, about 1.2 tons of waste sand can be produced for every ton of qualified castings produced. There are at least tens of millions of tons of waste sand produced by casting, and the amount is very large. However, my country's foundry industry has low technical level, high energy consumption, and long-standing problems of pollution emissions. The poor regenerability of limestone sand has led to a substantial increase in the amount of waste sand discharged from foundry production, and the cost of casting...

AI Technical Summary

Problems solved by technology

However, my country's foundry industry has low technical level, high energy consumption, and long-standing problems of pollution emissions. The poor regenerability of limestone sand has led to a substantial increase in the amount of waste sand discharged from foundry production, and the cost of castings has increased. Casting companies rarely invest in recycling equipment. Leading to the discharge and dumping of tens of millions of tons of discarded molding sand every year, and it has become an increasing trend year by year. Not only does it occupy a large amount of stacking space, but also the composition of the molding sand is complex and alkaline. Seriously, it will cause groundwater pollution, threaten human health and cause serious waste of resources. , so it is of great social significance to study the reuse of limestone sand waste

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