Primary Stone Jaw Crusher

1.Product Introduction

The jaw crusher is a crushing equipment widely used in mining, smelting, building materials, highways, railways, water conservancy, and chemical industries. It is primarily utilized for the primary (coarse) and secondary (medium) crushing of hard or medium-hard materials. Its working principle is similar to a "tiger's mouth," where materials are crushed by compression through the reciprocating movement between the movable jaw and the fixed jaw. It is characterized by its simple structure and reliable operation.

2.Application

Its applications are extensive, primarily covering the following fields:

• Mining: Used for the primary crushing of metallic ores (such as iron, copper, and gold) and non-metallic minerals (such as limestone, granite, and basalt). it is the critical first stage in any ore processing line.

• Construction & Building Materials: In sand and aggregate production, it is used to crush stone for construction gravel and manufactured sand (M-sand). It is widely applied in concrete batching plants, dry mortar production, and cement product manufacturing.

• Infrastructure Construction: Provides necessary stone and sand materials for major engineering projects, including highways, railways, bridges, water conservancy, hydropower, and airport runways.

• Industrial & Energy: Applied in metallurgy, chemicals, refractories, and ceramics for the pre-crushing treatment of raw materials.

• Resource Recycling: Capable of crushing solid waste such as construction debris, coal gangue, and tailings to achieve resource recycling and circular economy goals.

3.Working Principle

The working principle of the jaw crusher is based on a "curved compression" crushing mechanism. Driven by an electric motor through a pulley system, the movable jaw plate performs a periodic reciprocating motion against the fixed jaw plate, thereby achieving the compression, splitting, and crushing of the materials.

4.Advantages

• Simple Structure, Robust & Durable: The jaw crusher features a straightforward mechanical design consisting mainly of the frame, eccentric shaft, movable jaw plate, and toggle plate. With fewer components, it offers a low failure rate and is particularly suited for long-term stable operation in harsh working conditions.

• Large Crushing Ratio & High Efficiency: The crushing ratio typically reaches 6–8, enabling large materials to be crushed to the desired size in a single pass. Compared to traditional simple-pendulum types, the double-toggle (compound pendulum) jaw crusher can increase production efficiency by 20–30%, producing more uniform particle sizes with fewer flaky materials.

• Wide Material Applicability: It efficiently crushes various ores and rocks with compressive strengths below 350MPa, such as granite, limestone, quartz, basalt, and iron ore. It is also ideal for recycling solid wastes like construction debris, coal gangue, and tailings.

• Easy Operation & Maintenance: The equipment runs stably with low technical requirements for operators. Routine maintenance primarily involves periodic regreasing (recommended every 3 months) and monitoring bearing temperatures (not to exceed 70°C), resulting in low maintenance costs.

• Enhanced Automation: Latest advancements, such as "Auto-feeding Jaw Crushers," have integrated intelligent feeding systems using chain belts and shovel troughs. This significantly reduces manual intervention while improving operational continuity and overall efficiency.

• Energy Saving & Environmental Optimization: Modern designs optimize the crushing cavity shape and utilize hydraulic discharge port adjustment to lower energy consumption and reduce over-crushing. Some models also feature dust suppression and hydraulic overload protection systems for improved safety and environmental compliance.

5.Technical Specifications

6.Our Solutions