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Granite, as a common building material, is widely used in various construction and decoration projects due to its high hardness, wear resistance, and high compressive strength. However, during the processing of granite, there may be some stone loss due to cutting, polishing, and grinding operations. Reasonable calculation and control of these losses are of great significance for improving material utilization, reducing costs, and enhancing engineering economic benefits.

1. Types of losses during granite processing

In the processing of granite, losses are mainly divided into the following categories:

Cutting loss: When cutting granite stone raw materials into the required size, a certain amount of waste will be generated due to the accuracy limitations of the cutting equipment, improper operation, or the irregular shape of the raw granite stone materials themselves.

Polishing Loss: When polishing a rough granite stone slab into a polished finish, there will also be losses. The polishing loss rate is usually low, but as the thickness of the rough granite stone slab increases, the loss rate will decrease. During the polishing process, a layer of granite stone surface will be removed, resulting in wear and tear. The size of polishing loss is related to the accuracy of polishing equipment, polishing process, and the hardness of the granite stone itself.

Shape trimming loss: For irregular shaped granite stone materials such as circular arc slabs, oblique cut to size tiles, etc., shape trimming is required during the processing, which also generates certain losses.

2. Calculation method for granite stone loss rate

The granite stone loss rate is usually calculated using the following formula:

Loss rate (%) = (stone waste / total stone quantity) * 100%

Among them, the amount of granite stone waste refers to the amount of waste generated during the processing due to cutting, polishing, and other operations, while the total amount of granite stone refers to the total weight or volume of the original granite stone used.

3. Analysis of loss rate in various stages of granite processing

3.1. Processing granite stone raw materials into rough granite stone slab

Loss rate range: usually between 30% and 45%.

Influencing factors: shape, size, hardness of granite stone raw materials, and precision of cutting equipment. The more regular the shape and larger the size of the granite stone raw materials, the lower the loss rate; The higher the precision of the cutting equipment, the lower the loss rate.

Example analysis: Taking a granite block with a volume of 1 cubic meter as an example, if it is processed into a granite stone rough slab with a thickness of 2.0 centimeters, the loss rate is about 38.15%; If processed into a granite stone rough slab with a thickness of 3.2 centimeters, the loss rate decreases to 32.14%.

3.2. Processing granite stone rough slab into polished slab

Loss rate range: usually 4% -7%.

Influencing factors: thickness of the granite stone rough slab, accuracy of the polishing equipment, and polishing process, etc. The thicker the thickness of the granite stone rough slab, the lower the polishing loss rate; The higher the precision of the polishing equipment, the lower the loss rate.

Example analysis: If a granite stone rough slab with a thickness of 2.0 centimeters is polished into a polished slab with a thickness of 1.8 centimeters, the loss rate is about 6.18%; If the 3.2 centimeters thick granite stone rough slab is polished into a 3.0 centimeters polished slab, the loss rate decreases to 4.24%.

3.3. Processing of irregular granite stone materials

Characteristics of loss rate: The processing loss rate of irregular granite stone is usually high because complex shape adjustments are required.

Optimization method: Adopting the cutting process can significantly reduce the loss rate. The sleeve cutting process refers to optimizing and combining the cutting paths of multiple irregular granite stones, so as to maximize the utilization of granite stones during the cutting process.

4. How to reduce stone loss

Improve equipment accuracy: By using high-precision cutting and polishing equipment, waste and loss can be reduced.

Optimizing processing technology: Through reasonable processing technology and cutting path design, stone can be maximally utilized and waste can be reduced.

Strengthening employee training: Improving the skill level and sense of responsibility of operators can reduce losses caused by improper operations.

Recycling waste: Recycling and reusing the waste generated during the processing can reduce the loss rate and improve resource utilization.

The granite stone loss during processing is a complex issue that involves multiple links and factors. By reasonably calculating the loss rate, analyzing the causes of loss, optimizing processing technology, and strengthening management measures, the loss rate can be effectively reduced and the material utilization rate can be improved. This not only helps to reduce costs and improve the economic benefits of engineering, but also contributes to the sustainable use of resources and environmental protection. Therefore, in the process of granite processing, the calculation and control of granite stone loss should be highly valued.