Applicable Materials and Operating Conditions
The hydraulic open-box sand making machine is suitable for sand making operations with medium and low abrasiveness ores. Common materials include limestone, dolomite, river pebbles, and some granite and basalt rocks. The equipment is suitable for small and medium-capacity sand production lines, or as a secondary crushing and shaping sand making equipment. It can replace roller crushers and hammer crushers when upgrading and retrofitting older production lines.
Conditional Applicability
- For high-strength rocks such as granite and basalt, whether they are suitable for operation with the hydraulic open-box sand making machine requires comprehensive consideration of the following factors:
- Whether the abrasion index (AI) is below 0.7;
- The level of quartz (SiO₂) content;
- The production line capacity and operating intensity.
- Under the conditions of AI ≤ 0.7, moderate capacity, and non-continuous high-load operation, the hydraulic open-box sand making machine can still operate stably, but the wear parts will wear out relatively quickly, and the operating costs need to be reasonably evaluated.
Conditions Under Which Use is Not Recommended
Under the following operating conditions, it is not recommended to use the hydraulic open-box sand making machine as the main sand making equipment:
- The raw material abrasion index (AI) is consistently higher than 0.7, or the quartz content exceeds 60%.
- High-capacity, continuous operation conditions, where wear part costs are highly sensitive;
- The raw material moisture content is consistently higher than 8%, or the mud content exceeds 10%.
For the above conditions, it is recommended to prioritize the use of low-wear structure equipment such as vertical shaft impact crushers (VSI), or to add a pre-treatment process before sand making.
Core advantages of the hydraulic box-opening sand making machine
- The hydraulic system enables quick opening of the machine casing, plus the large opening angle provides full access to the internal structure, making the replacement of hammer heads and grate bars much easier. It only takes 5 minutes instead of the traditional type, which takes 3 to 4 hours. Manual maintenance and replacement time is shortened, reducing downtime as well as labor costs.
- The bottom grate device ensures a high yield rate, which can generally reach over 90%.
- The base of the equipment is made of heavy-duty I-beams, which ensures the stability of the equipment during operation.
- The special-purpose hammer for fine crushing has achieved a revolutionary breakthrough by “using the hammer crusher as a jaw crusher, thus completely realizing the low-cost operation of the fine crusher.
Comparison with mainstream sand making machines
Hydraulic open-type sand making machine vs.VSI sand making machine
| Comparison Item | Hydraulic Sand Making Machine | VSI sand making machine |
|---|---|---|
| Investment Cost | Lower | Higher |
| Wear Parts Cost | Low | High |
| Sand Particle Shape | Moderately Angular | Excellent Particle Shape |
| Maintenance Difficulty | Simple | Relatively Complex |
| Applicable Scale | Small to Medium Capacity | Medium to Large High-End Production Lines |
Compared to vertical shaft impact crushers (VSI), hydraulic open-type sand making machines offer advantages in terms of investment cost, maintenance difficulty, and wear part consumption. They are well-suited for materials with medium to low abrasiveness and are ideal for small to medium-capacity sand production projects or those with limited budgets. VSI crushers, on the other hand, are more suitable for highly abrasive materials or large-capacity, continuous production lines that require a higher quality finished product particle shape.
| Comparison Dimension | Hydraulic Impact Crusher | Double Roll Crusher |
|---|---|---|
| Crushing Method | High-speed impact + impact crushing | Compression crushing |
| Single Machine Crushing Ratio | High (can complete medium crushing + sand making in one step) | Low (usually requires multi-stage crushing) |
| Feed Particle Size Adaptability | Strong, can accept larger feed | Weak, requires strict control of feed particle size | Weak, requires strict control of feed particle size |
| Processing Capacity (t/h) | High, suitable for medium and above capacity | Lower, more suitable for small production |
| Adaptability to Feed Fluctuations | Good, less prone to “clogging.” | Poor, prone to material jamming and machine stalling |
| Adaptability to Small Amounts of Wet Material | Relatively good (≤5%) | Poor, prone to roller sticking | Poor, prone to roller sticking |
| Continuous Operation Stability | Stable, less affected by fluctuations | Sensitive to changes in working conditions |
| Typical Application Location | Secondary crushing/shaping and sand making | Fine crushing / small-scale sand making |
| Suitable Production Line Scale | Medium and small-scale sand making lines | Small-scale or experimental production lines |
Compared to double-roll sand making machines, hydraulic open-box sand making machines have a larger crushing ratio and higher single-machine processing capacity. They are more adaptable to fluctuations in feed rate and particle size variations, and are less prone to “clogging,” making them more suitable as the main or front-end sand making equipment in small and medium-sized sand production lines.
Finished Product Performance
The hydraulic impact crusher utilizes a combination of high-speed impact and counter-impact crushing, resulting in uniformly shaped sand particles with a continuous gradation and minimal over-crushing. It meets the requirements for manufactured sand used in general concrete and road construction projects.
Finished product features
- Good particle shape, low content of flaky and elongated particles
- Concentrated particle size, stable gradation
- Well-controlled fine powder content, high sand production rate
- Particle size can be adjusted through the grate gap
- Suitable for construction sand and road base sand
By flexibly adjusting the grate spacing and configuring different hammer head structures, the hydraulic open-type sand making machine can quickly meet the requirements for different finished sand particle sizes, helping users achieve multi-specification sand production on the same equipment, thereby increasing the equipment’s value and return on investment.
Wear parts & operating cost of the hydraulic sand making machine
Main wear parts: Hammer heads, liner plates, grate bars
Material options: High manganese steel / Alloy steel
Factors affecting service life:
- Material hardness
- Moisture and clay content
- Operating conditions
Advantages in operating costs:
- Low energy consumption per ton of sand produced
- Controllable wear part replacement costs
- Suitable for budget-sensitive projects
Technical parameters
| Model | Feed inlet size（mm） | FFeed particle size（mm） | Discharge praticle size （mm） | Adjustable discharge slot width （mm） | Capacity（t/h） | Power （kw） | ||
| cement clinker | Limestone | Glass sand | ||||||
| 800×400 | 400×230 | 120 | ≤5 | 5-20 | 20-30 | 30-45 | 35-45 | 22-37 |
| 800×600 | 600×230 | 180 | ≤5 | 5-20 | 35-40 | 40-55 | 45-55 | 37-45 |
| 800×800 | 800×230 | 180 | ≤5 | 5-20 | 35-45 | 60-65 | 55-65 | 45-55 |
| 1010×1010 | 1000×330 | 180 | ≤5 | 5-20 | 45-55 | 60-75 | 65-75 | 55-75 |
| 1200×1000 | 1200×330 | 180 | ≤5 | 5-20 | 80-110 | 80-100 | 80-100 | 90-110 |
| 1200×1200 | 1200×420 | 180 | ≤5 | 5-20 | 100-110 | 90-100 | 90-120 | 110-132 |
| 1400×1400 | 1400×420 | 190 | ≤5 | 5-20 | 100-150 | 100-150 | 120-150 | 160 |
| 1600×1600 | 1600×520 | 190 | ≤5 | 5-20 | 170-210 | 190-250 | 190-250 | 250 |
| 1800×1800 | 1800×520 | 190 | ≤5 | 5-20 | 250-270 | 280-310 | 280-310 | 315 |
Model Selection Guide
Selecting the appropriate hydraulic impact crusher model requires a comprehensive assessment based on raw material characteristics, production capacity requirements, and finished sand specifications:
Feed Particle Size
Determine the maximum particle size of the raw material and select the corresponding model based on the feeding capacity of different models.
Larger feed particle sizes require models with a higher crushing ratio to avoid clogging or affecting production.
Target Production Capacity (t/h)
Select a model with a matching processing capacity based on daily production or hourly capacity requirements.
Standard models are suitable for small to medium capacities, while high-capacity production may require reinforced models or multi-unit configurations.
Finished Sand Specifications
Based on customer requirements for particle size and gradation, select a model that supports adjustable grate spacing and hammer head configurations.
For diverse particle size requirements, prioritize equipment with flexible adjustment capabilities.
Supporting Systems and Application Scenarios
Ensure compatibility with sand washing, screening, and other equipment to ensure smooth operation of the entire production line.
When used as a secondary crushing or shaping sand-making equipment, a slightly smaller model can be selected, but ensuring the crushing ratio and finished particle shape is crucial.
Note: For highly abrasive or high-moisture materials, please consult with an engineer to confirm the optimal model, considering the abrasion index, moisture content, and production line load, to avoid high wear or clogging risks.
FAQ
Q1. What hardness of rocks are suitable for the hydraulic open-type sand making machine?
A: Generally suitable for medium and low abrasive rocks with a Mohs hardness ≤6; for high-hardness rocks, wear part consumption needs to be evaluated.
Q2. Can the equipment operate continuously for 24 hours?
A: It can operate continuously under medium abrasive materials and reasonable load; for highly abrasive or high-capacity conditions, intermittent or combined use is recommended.
Q3. Can materials with high moisture content be processed into sand?
A: Raw materials with a moisture content of ≤8% are suitable; materials with a moisture content higher than 8% are prone to adhesion and blockage, requiring pre-treatment or reduced production capacity.
Q4. What is the approximate service life of wear parts?
A: Depending on the abrasiveness of the material and operating intensity, hammer heads and liners generally last 500–2000 hours, and the service life can be extended through material upgrades.
Q5. Is customization supported?
Customization is available based on production capacity requirements, motor power, voltage specifications, and wear part materials to meet different production line conditions.
Q6. What is the adjustable range of the finished product particle size?
Different particle sizes can be achieved by adjusting the grate bar gap and hammer head structure, adapting to multi-specification sand making needs.
Q7. Is equipment maintenance complicated?
The hydraulic open-type design makes opening and inspection quick, wear part replacement simple, and the maintenance cycle long with low labor intensity.
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