Slate Crushing Case: Turning Hard Rock into Premium Cubic Sand with Double Roller Sand Maker

Applicable materials:River pebbles, calcite, quartz stone, marble, cobblestone, bentonite, iron ore, bluestone, mountain rock, water slag, limestone, weathered sand, diabase, granite, basalt, silicon carbide, emery, sintered bauxite, magnesia, etc.

  • Feed size:40-120mm
  • Productive capacity:20-400t/h

Key Equipment

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In the machine-made sand industry, slate, known for its hard texture and strong abrasion resistance, has always been a “tough nut to crack” in sand making production lines. Many traditional sand making machines face thorny issues when processing slate, such as extremely fast hammer wear, high flaky content in the finished product, and severe dust pollution, leading to exorbitant production costs. Recently, a major building materials plant successfully broke through this production bottleneck and achieved a dual leap in capacity and profitability after introducing Huashengming’s slate sand making machine.

Slate sand making site

Slate sand making site

Project Background: Traditional Equipment Hits a “Hard Rock” Bottleneck

The building materials plant is rich in slate mine resources and planned to build a high-quality machine-made sand production line to supply aggregates for surrounding expressways and large commercial concrete mixing stations. However, during the trial production phase, the traditional vertical shaft impact (VSI) sand making machine adopted by the plant exposed serious problems: due to the high hardness and strong abrasiveness of slate, the wear parts inside the equipment were consumed extremely fast, requiring downtime for replacement almost every month. Meanwhile, the severe over-crushing caused by high-speed impacts led to an unreasonable gradation of the finished sand and excessive flaky particles, making it difficult to meet the stringent standards of C50 and above high-performance concrete.

Solution: Introducing Huashengming Hydraulic Double Roller Sand Maker

Facing this dilemma, the plant conducted extensive research and ultimately selected Huashengming Heavy Industry’s hydraulic double roller sand maker, specifically designed for high-hardness rocks. Based on the physical characteristics of slate, Huashengming’s technical team customized a complete production line configuration. The equipment adopts a pure static pressure “laminated crushing” principle, utilizing two high-strength wear-resistant rollers to apply high-pressure extrusion to the material. This causes the slate to naturally fracture along its internal cleavage planes, fundamentally changing the traditional “hard-on-hard” crushing method.

Practical Results: Cost Reduction, Efficiency Improvement, and Stunning Market Response

After the equipment was put into operation, all indicators met or even exceeded the plant’s expectations, bringing unexpected surprises:

Significantly Extended Wear Part Lifespan and Plummeted Maintenance Costs: The roller skins of Huashengming’s equipment are made of a special high-chromium manganese steel wear-resistant alloy, featuring extremely high hardness and impact resistance. Under the actual working conditions of crushing slate, the service life of the roller skins is several times longer than that of traditional hammers. This drastically reduced the frequency of shutdown maintenance, saving the plant hundreds of thousands of yuan in consumable replacement costs annually.

Excellent Product Shape with High Market Demand: The machine-made slate sand produced by the hydraulic double roller crusher features a perfect cubic shape, distinct edges, and moderate surface roughness, with continuous and uninterrupted gradation. Once launched, this premium sand was highly sought after by surrounding large commercial concrete mixing stations due to its excellent concrete workability. Its selling price per ton was several dollars higher than that of similar ordinary machine-made sand.

Intelligent Control Ensures Stable Operation: The fully automatic hydraulic system equipped on the equipment can adjust the roller gap and pressure in real-time according to the feed conditions of the slate. This not only ensures precise control over the discharge size, but its automatic release protection function against uncrushable iron objects completely eliminates the risk of jamming and stalling, guaranteeing 24/7 uninterrupted and highly efficient operation of the production line.

Slate

Slate

Customer Feedback

During a follow-up visit, the head of the building materials plant commented: “Crushing slate used to be like ‘gnawing on stones’—the machine broke down constantly, and the sand couldn’t fetch a good price. After switching to Huashengming’s double roller sand maker, not only is the machine rugged and worry-free, but the quality of the sand produced has also won high praise from concrete mixing stations. We recovered the equipment investment in less than a year!”
With its hardcore technical strength and outstanding practical performance, the Huashengming slate sand making machine has once again proven its leading position in the field of hard rock crushing. If you are also facing challenges in hard rock sand making, please contact Huashengming Heavy Industry. We will provide you with a customized sand making solution.
suitable for more than 200 types hard materials
  • Small-Scale Gold Ore Crushing Line
  • Granite sand making
  • Molybdenum ore beneficiation
  • Limestone sand making

Gongyi Huashengming Heavy Machinery Factory

Gongyi Huashengming Heavy Industry Machinery Factory is a production of crushing and screening equipment, production, sales as one of the large machinery intelligent manufacturing enterprises. Company headquarters is located in the Central Plains of the pearl Gongyi City, the main roller crusher equipment, mobile sand making equipment, screening equipment and construction waste treatment equipment series products, our company’s production site thousands of thousands, all over the provinces and cities. Over the years we have been consistent, honest service to every customer. We sincerely look forward to cooperating with you.

 

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