Low Fe2O3 Limestone Glassmaking Industry China Supply

Limestone powder is mainly used in the manufacture of building materials and industrial materials, including plastic, paper, rubber, toothpaste and other materials, and limestone powder is also used in the production of glass, in addition, limestone powder scattered in the soil can play a role in adjusting the acidity of the soil.

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Model:
Limestone

Product Description

Limestone

Introduction:

Limestone powder is mainly used in the manufacture of building materials and industrial materials, including plastic, paper, rubber, toothpaste and other materials, and limestone powder is also used in the production of glass, in addition, limestone powder scattered in the soil can play a role in adjusting the acidity of the soil.

Test Report:

THE SAMPLE OF THE GOODS	Limestone
Fe2O3	0.0068
CaO	55.21
MgO	0.48

Applications:

Basically, there are increased processing costs for producing lime from raw limestone. So typically, limestone is chosen for lower cost, but also because over time glass manufacturers have become accustomed to using limestone which has proven to meet high quality standards. Each of the three components mentioned above has its own particular purpose in the glassmaking process. Silica—when melted—forms the glass, but its melting temperature is very high, often in excess of 3110°F (>1710°C), and this makes handling the glass difficult. Soda is therefore added as a flux to reduce the melting temperature, but it also weakens the glass and makes it soluble in water. Limestone stabilizes the glass, solving the issue of solubility and increases its hardness and chemical durability.

However, the benefits of limestone are broader than this brief outline suggests. It also plays a role in lowering the melting temperature of the batch by improving the melting kinetics. As a result, the various ingredients of the batch melt congruently and at a lower temperature than the individual melting temperatures of each of the constituent parts (a property known as an eutectic mixture). This means less energy is consumed by the melting process, reducing costs, and providing environmental benefits.

Limestone also helps to improve the handling and formability of the molten glass. In a pure silica melt, viscosity is high and this (alongside with high temperature) makes the glass difficult to shape, especially when it needs to hold a form, for example, in the production of glass containers. Limestone reduces the viscosity, making the liquid glass easier to handle and form into the required shape.

A final benefit of limestone in glassmaking is that it helps to avoid devitrification, a process of crystallization around small impurities in the mix that causes clouding and other defects.