Frac-grade Silica Sand Processing Line

Frac-grade Silica Sand Processing Line

As global oil and gas operations extend to deeper, higher-pressure reservoirs, operators require frac sand proppants that meet stringent industry standards for crush resistance, roundness, sphericity, acid solubility and particle size distribution. Guote delivers full EPC turnkey frac-grade silica sand processing lines, engineered to transform raw silica deposits — wind-blown dune sand, alluvial sand or crushed quartzite — into premium hydraulic fracturing proppants suitable for both onshore and offshore applications.

Backed by our in-house beneficiation laboratory and process engineering team, we optimize each flowsheet based on comprehensive feedstock characterization to maximize saleable product yield and minimize fines waste. Capacities cover a broad range and are fully scalable, with all plants designed for continuous operation and reliable long-term performance.

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PROCESS DESCRIPTION

01

Crushing & VSI Sand Making

Depending on feedstock type and grain characteristics, we configure primary and secondary crushing circuits to reduce raw quartzite or coarse silica to a uniform feed size. Material is then fed to vertical shaft impactor (VSI) impactors, which use high-velocity inter-particle collision to produce cubical, well-rounded sand grains with minimal needle and flake particles, directly improving proppant sphericity and crush strength. Closed-circuit screening ensures consistent feed size to the impactors and minimizes fines generation.
02

Attrition Scrubbing & Desliming

High-intensity attrition scrubbers apply vigorous inter-particle friction to strip clay coatings, silt and organic contaminants from grain surfaces, which would otherwise reduce proppant performance and increase acid solubility. The scrubbed slurry is then discharged into desliming cones for primary desliming, where ultra-fine slime fractions and lightweight gangue are removed via the overflow stream. This step ensures clean grain surfaces for consistent downstream separation and sizing performance.
03

Hydraulic Classification & Magnetic Purification

A series of precision hydraulic classifier the sand into standard API mesh fractions, delivering a tight particle size distribution aligned with industry specifications. The sized sand slurry then passes through Guote’s proprietary wet magnetic separators, which remove trace iron-bearing minerals to reduce acid solubility and ensure compliance with strict proppant chemical requirements.Multi-stage classification and purification circuits are configured based on feedstock quality to achieve optimal product performance.
04

Drying, Final Sizing & Tailings Management

The classified sand is dewatered and fed to a dryer fitted with a dedicated dust collection system, enabling fully enclosed drying operations with controlled dust emissions. The dryer delivers uniform, gentle drying with precise temperature control, producing a low-moisture product without thermal damage to grain structure. An integrated cooling section brings the product down to ambient temperature before final sizing to prevent screen blinding and packaging issues. Multi-stage square swing screens perform final size grading, ensuring strict adherence to standard industry mesh specifications. All tailings and process water are routed to a dedicated thickening and recycling system, where clarified water is recirculated to the production circuit to minimize freshwater intake.

PROCESSING FLOW

Core Advantages & Performance Outcomes

-Stringent industry compliance: Engineered to meet all key industry performance standards for crush resistance, roundness, sphericity, acid solubility and size distribution, suitable for both onshore and deep offshore applications.

-High product yield: Optimized crushing, classification and purification circuits maximize yield of saleable proppant grades with minimal fines generation, improving overall project economics.

-Superior grain quality: Premium silica purity with low acid solubility ensures long-term proppant stability and performance in harsh downhole environments.

-Full EPC turnkey delivery: End-to-end accountability from feedstock testing and process design to equipment manufacturing, installation, commissioning and ongoing technical support.

-Efficient and sustainable operation: Waste heat recovery systems and closed-loop water recycling reduce energy and freshwater consumption, meeting international environmental and operational efficiency standards.

Target Applications

Hydraulic fracturing proppants, onshore and offshore oil & gas well completion, shale gas extraction, tight oil reservoir development, unconventional oil & gas production.

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