Title: What stones can be used to make sand? ——Analysis of sand making raw materials and industry hot spots
introduction
With the rapid development of the construction industry, manufactured sand, as a substitute for natural sand, has become an urgent demand in the market. So, which stones can be used to make sand? This article combines the hot topics on the Internet in the past 10 days to provide you with a structured analysis of the selection criteria for sand-making raw materials, and attaches hot industry data.
1. Types of stones suitable for sand making
Sand-making raw materials need to meet the requirements of moderate hardness, uniform particles, and low mud content. The following is a comparison of common sand and stone materials:
| stone type | Hardness (Mohs) | Finished sand quality | Applicable scenarios |
|---|---|---|---|
| granite | 6-7 | Sharp particles and high strength | high strength concrete |
| limestone | 3-4 | The particles are round and have high powder content. | Ordinary building materials |
| basalt | 7-8 | Good wear resistance, higher cost | highway aggregate |
| river pebbles | 7-8 | High cleanliness and good particle shape | High quality construction sand |
2. Hot spots in the sand making industry in the past 10 days
Through network-wide data monitoring, we found that the following hot topics are closely related to the demand for sand production:
| hot events | Relevance | focus of discussion |
|---|---|---|
| Mining of natural sand is prohibited in many places | ★★★★★ | Manufactured sand alternatives |
| New environmentally friendly sand making equipment released | ★★★★ | Energy saving and consumption reduction technology |
| Construction waste sand making project put into operation | ★★★ | Resource recycling |
3. Five key indicators for selecting raw materials for sand making
According to industry standards, high-quality sand-making raw materials must meet the following conditions:
1.Compressive strength: ≥100MPa (avoid excessive crushing during production)
2.Mud content: <3% (affects concrete adhesion)
3.flake particles:＜15% (guarantee sand fluidity)
4.Sulfide content: <1% (prevent engineering corrosion)
5.radioactivity: Comply with GB6566 standard
4. Suggestions on matching sand making process and equipment
| Raw material type | Recommended crushing equipment | Capacity (tons/hour) |
|---|---|---|
| granite | Cone crushing + impact crushing | 50-300 |
| limestone | hammer crusher | 100-500 |
Conclusion
The selection of sand-making raw materials requires comprehensive consideration of rock characteristics, cost and environmental protection requirements. Currently, with policy restrictions on natural sand, the demand for manufactured sand raw materials such as granite and basalt continues to rise. It is recommended that investors pay attention to intelligent sand making equipment and construction waste recycling technology to grasp new trends in the industry.
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