Search
When discussing the crushing and sand production of hard rocks such as basalt and granite, many people encounter problems such as severe wear of parts, insufficient output to meet design requirements, and poor particle shape of the finished sand. Sand
When discussing the crushing and sand production of hard rocks such as basalt and granite, many people encounter problems such as severe wear of parts, insufficient output to meet design requirements, and poor particle shape of the finished sand. Sand production from hard rocks like basalt is indeed fraught with challenges.
More Hard Rock Crushing and Sand Production Equipment
Difficulties in Basalt Crushing Processing
High Strength and High Abrasiveness: Basalt has high compressive strength, good toughness, high hardness, and strong abrasiveness, making it difficult for crushing equipment to reach its theoretical processing capacity.
Poor Particle Shape of Finished Product: The crushed aggregate has a poor particle shape, with a high proportion of flaky stones, making it difficult to control the content of needle-like and flaky particles in the finished coarse aggregate.
High Fineness Modulus: After basalt is crushed by a vertical shaft impact crusher, the aggregate <5mm contains a high proportion of stone chips and coarse particles, with fewer fine particles and a low stone powder content. While rod mill sand production is feasible, its output is low, and its water, steel, and electricity consumption are high.
Technological Countermeasures for Basalt Crushing and Processing A hydropower station encountered the aforementioned problems during its construction phase. Its raw materials consisted of dense massive basalt and amygdaloidal basalt. The system needed to process 1.2 million m³ of concrete aggregate, with a total production capacity of 154,000 t/month, a raw material processing capacity of 560 t/h, a finished aggregate production capacity of 396 t/h, and a finished sand production capacity of 140 t/h.
Equipment Selection
Based on the characteristics of basalt, a "four-stage crushing, vertical shaft impact crusher, and rod mill combined sand making" process is adopted. The equipment configuration is as follows:
Coarse Crushing Workshop: Equipped with Shibang Group jaw crusher
Medium Crushing Workshop: Equipped with Shibang Group single-cylinder hydraulic cone crusher
Screening Workshop: Equipped with vibrating screen
Sand Making Workshop: Equipped with Shibang Group vertical shaft impact crusher
Inspection Screening Workshop: Equipped with multi-cylinder hydraulic cone crusher
Coarse and Fine Aggregate Stockpile: Equipped with feeder
Controlling Finished Aggregate Particle Shape
To improve the particle shape of the finished aggregate after basalt processing, the following measures are taken to control the quality of coarse aggregate:
Controlling the medium and fine crushing ratio, maintaining continuous feed gradation, and achieving full feeding and layered crushing.
Employing shaping measures: the first screening workshop only produces large and medium-sized finished aggregates. The aggregate enters the ultrafine crushing workshop (equipped with 3 vertical shaft impact crushers) for shaping, and then the second screening workshop produces small and medium-sized finished aggregates.
Controlling Sand Production Rate, Fineness Modulus, and Stone Powder Content
To address the issues of low sand production rate, high fineness modulus, and low stone powder content in basalt sand production, the following measures were taken:
Increasing the rotor speed of the vertical shaft impact crusher (VHSC) increases the linear velocity of the aggregate within the crushing chamber (to 65 m/s), thereby improving the sand production rate and stone powder content, and reducing the fineness modulus of the sand.
Adjusting the feed gradation of the VHSC to improve sand production efficiency.
Aggregates <5mm produced after fine crushing in the system are fed into the VHSC for shaping to control the quality of the finished sand.
Coarse particles processed by the VHSC are then fed back into a rod mill for further crushing to adjust the fineness modulus and stone powder content of the finished material.
Using a completely dry production method improves sand production efficiency.
Controlling the Stone Powder Content of Different Finished Sands
This system produces both conventional concrete sand and roller-compacted concrete sand, with different stone powder contents: 6-18% and 12-18%, respectively. Quality is controlled through the following measures:
All aggregates after medium and fine crushing are processed by a vertical shaft impact crusher to remove some coarse particles, ensuring the stone powder content and fineness modulus of sand used in normal concrete.
Sand for roller-compacted concrete is produced by a combination of a vertical shaft impact crusher and a rod mill, and fine sand lost in the sand washing machine is recovered and added to the finished product to increase the stone powder content.
Reference Case
Project Scale: 3.4 million tons of basalt per year
Processed Material: Basalt
Finished Product Particle Size: 0-3-5-10-15-26.5mm
Equipment Configuration: Shibang Group jaw crusher, single-cylinder hydraulic cone crusher, multi-cylinder hydraulic cone crusher, vertical shaft impact crusher, vibrating screen, feeder
Processing Technology: Dry process
Finished Product Application: Asphalt
Previous: SMP Crusher
Next: SMP Crusher
When discussing the crushing and sand production of hard rocks such as basalt and granite, many people encounter problems such as severe wear of parts, insufficient output to meet design requirements, and poor particle shape of the finished sand. Sand
When discussing the crushing and sand production of hard rocks such as basalt and granite, many people encounter problems such as severe wear of parts, insufficient output to meet design requirements, and poor particle shape of the finished sand. Sand production from hard rocks like basalt is indeed fraught with challenges.
More Hard Rock Crushing and Sand Production Equipment
Difficulties in Basalt Crushing Processing
High Strength and High Abrasiveness: Basalt has high compressive strength, good toughness, high hardness, and strong abrasiveness, making it difficult for crushing equipment to reach its theoretical processing capacity.
Poor Particle Shape of Finished Product: The crushed aggregate has a poor particle shape, with a high proportion of flaky stones, making it difficult to control the content of needle-like and flaky particles in the finished coarse aggregate.
High Fineness Modulus: After basalt is crushed by a vertical shaft impact crusher, the aggregate <5mm contains a high proportion of stone chips and coarse particles, with fewer fine particles and a low stone powder content. While rod mill sand production is feasible, its output is low, and its water, steel, and electricity consumption are high.
Technological Countermeasures for Basalt Crushing and Processing A hydropower station encountered the aforementioned problems during its construction phase. Its raw materials consisted of dense massive basalt and amygdaloidal basalt. The system needed to process 1.2 million m³ of concrete aggregate, with a total production capacity of 154,000 t/month, a raw material processing capacity of 560 t/h, a finished aggregate production capacity of 396 t/h, and a finished sand production capacity of 140 t/h.
Equipment Selection
Based on the characteristics of basalt, a "four-stage crushing, vertical shaft impact crusher, and rod mill combined sand making" process is adopted. The equipment configuration is as follows:
Coarse Crushing Workshop: Equipped with Shibang Group jaw crusher
Medium Crushing Workshop: Equipped with Shibang Group single-cylinder hydraulic cone crusher
Screening Workshop: Equipped with vibrating screen
Sand Making Workshop: Equipped with Shibang Group vertical shaft impact crusher
Inspection Screening Workshop: Equipped with multi-cylinder hydraulic cone crusher
Coarse and Fine Aggregate Stockpile: Equipped with feeder
Controlling Finished Aggregate Particle Shape
To improve the particle shape of the finished aggregate after basalt processing, the following measures are taken to control the quality of coarse aggregate:
Controlling the medium and fine crushing ratio, maintaining continuous feed gradation, and achieving full feeding and layered crushing.
Employing shaping measures: the first screening workshop only produces large and medium-sized finished aggregates. The aggregate enters the ultrafine crushing workshop (equipped with 3 vertical shaft impact crushers) for shaping, and then the second screening workshop produces small and medium-sized finished aggregates.
Controlling Sand Production Rate, Fineness Modulus, and Stone Powder Content
To address the issues of low sand production rate, high fineness modulus, and low stone powder content in basalt sand production, the following measures were taken:
Increasing the rotor speed of the vertical shaft impact crusher (VHSC) increases the linear velocity of the aggregate within the crushing chamber (to 65 m/s), thereby improving the sand production rate and stone powder content, and reducing the fineness modulus of the sand.
Adjusting the feed gradation of the VHSC to improve sand production efficiency.
Aggregates <5mm produced after fine crushing in the system are fed into the VHSC for shaping to control the quality of the finished sand.
Coarse particles processed by the VHSC are then fed back into a rod mill for further crushing to adjust the fineness modulus and stone powder content of the finished material.
Using a completely dry production method improves sand production efficiency.
Controlling the Stone Powder Content of Different Finished Sands
This system produces both conventional concrete sand and roller-compacted concrete sand, with different stone powder contents: 6-18% and 12-18%, respectively. Quality is controlled through the following measures:
All aggregates after medium and fine crushing are processed by a vertical shaft impact crusher to remove some coarse particles, ensuring the stone powder content and fineness modulus of sand used in normal concrete.
Sand for roller-compacted concrete is produced by a combination of a vertical shaft impact crusher and a rod mill, and fine sand lost in the sand washing machine is recovered and added to the finished product to increase the stone powder content.
Reference Case
Project Scale: 3.4 million tons of basalt per year
Processed Material: Basalt
Finished Product Particle Size: 0-3-5-10-15-26.5mm
Equipment Configuration: Shibang Group jaw crusher, single-cylinder hydraulic cone crusher, multi-cylinder hydraulic cone crusher, vertical shaft impact crusher, vibrating screen, feeder
Processing Technology: Dry process
Finished Product Application: Asphalt
Previous: SMP Crusher
Next: SMP Crusher
How to configure a copper ore crushing production line with a capacity of 300 tons per hour, and which equipment should be selected?
Why choose a single-cylinder hydraulic cone crusher for granite crushing production line construction?
What factors should be considered when selecting a sand making machine?
What processes and equipment are required for a sand and gravel aggregate production line?
Suixian County, Hubei Province, has invested 550 million yuan to build a green sand and gravel aggregate project with an annual output of nearly 10 million tons.How to configure a copper ore crushing production line with a capacity of 300 tons per hour, and which equipment should be selected?Why choose a single-cylinder hydraulic cone crusher for granite crushing production line construction?What factors should be considered when selecting a sand making machine?What processes and equipment are required for a sand and gravel aggregate production line?Suixian County, Hubei Province, has invested 550 million yuan to build a green sand and gravel aggregate project with an annual output of nearly 10 million tons.