Question 1

The hammer crusher discharge has recently become noticeably coarser, but the screen is not broken. What is going on?

Accepted Answer

Coarser discharge from a hammer crusher is most commonly caused by hammer wear reducing effective striking radius, or increased gap between rotor and screen plate/breaker plate. St…

Question 2

My impact crusher shakes strongly during operation and the foundation bolts are loose. What is causing this?

Accepted Answer

Excessive vibration in an impact crusher is usually caused by rotor unbalance, uneven blow bar wear, loose foundation bolts, or uneven feed/impact. Priority checks: blow bar symmet…

Question 3

My jaw crusher output was normal a few days ago, but today it suddenly dropped by about 30% and the discharge is finer. What could be wrong?

Accepted Answer

A sudden drop in jaw crusher output is most often caused by a blocked discharge opening, severely worn jaw plates, slipping drive belts, or insufficient motor load. Stop the machin…

Question 4

How to configure a crushing line for hard rock such as granite and basalt?

Accepted Answer

Granite and basalt typically have compressive strengths of 250–350 MPa and are highly abrasive. For the secondary stage, strongly recommend a cone crusher (CS/PY series) instead of…

Question 5

For limestone secondary crushing, should I choose an impact crusher or a hammer crusher?

Accepted Answer

If the product must be cubical aggregate for concrete or asphalt mixing, choose the PF impact crusher. If high reduction ratio, lower investment, and lower sensitivity to flakiness…

Question 6

I am planning a stone crushing line with limestone feed around 500 mm and target output of about 150 t/h. Which jaw crusher model should I choose?

Accepted Answer

We recommend the PE600×900 jaw crusher from Shandong Lianbang Heavy Industry. Its feed opening of 600×900 mm accepts material up to 500 mm, and its rated capacity of 60–160 t/h ful…

Question 7

After crushing, the sand and gravel need washing; should I choose a wheel sand washer or a spiral sand washer?

Accepted Answer

When the final product is used for concrete, asphalt or high-grade mortar and mud content must be <3%, a sand washer should be installed. For low-clay material mainly needing dust …

Question 8

What material should be selected for crusher wear parts (jaw plates, blow bars, hammers, liners), and what is their approximate service life?

Accepted Answer

For jaw crushers, use high-manganese steel Mn13Cr2 or Mn18Cr2 jaw plates, with Mn18Cr2 for hard rock; for impact crushers, choose high-chrome cast iron (Cr20-27, low impact high ab…

Question 9

Under what circumstances should a mobile crushing plant be chosen instead of a fixed crushing line?

Accepted Answer

Mobile crushing plants suit projects with short duration (<2 years), frequent site relocation, poor road transport, dispersed material sources or strict environmental approvals. Fi…

Question 10

When jaw crusher, impact crusher, vibrating screen, feeder and belt conveyor form one production line, how should the capacity of each unit be matched?

Accepted Answer

Follow the rule of 'upstream surplus, downstream step-down': feeder capacity = 1.1–1.2 × rated jaw crusher capacity; secondary crusher capacity = 1.0–1.1 × actual primary crusher o…

Question 11

How should the crushing line be configured for hard and abrasive rocks such as granite and basalt?

Accepted Answer

For hard, abrasive rocks such as granite, basalt and quartzite with compressive strength >250 MPa and high SiO₂ content, use two- or three-stage crushing: PE jaw crusher for primar…

Question 12

For the secondary crushing stage of a limestone quarry, should I choose an impact crusher or a hammer crusher?

Accepted Answer

Limestone compressive strength is typically 80–180 MPa. For clean, low-abrasion, low-clay limestone, choose the PC/PCX hammer crusher for lower investment and high reduction ratio;…

Question 13

For a new stone crushing line, which jaw crusher should be used as the primary crusher and how do I choose the model?

Accepted Answer

For primary crushing, choose the PE series jaw crusher for medium-to-coarse crushing of rocks and ores with compressive strength ≤320 MPa. Key selection rules: max feed lump ≈ (0.8…

Question 14

For medium/fine crushing (secondary crushing), should I choose a cone crusher or an impact crusher?

Accepted Answer

It depends on material hardness and the required particle shape. For hard materials (granite, basalt, river pebbles, etc.), choose the cone crusher: with laminated crushing, its we…

Question 15

In a crushing line, how should I select materials for jaw plates, blow bars, and hammers? What does Shandong Lianbang recommend?

Accepted Answer

Jaw crushers should use high-manganese steel (Mn13/Mn18) jaw plates. Impact-crusher blow bars should use high-chrome cast iron or composite high-manganese steel. Hammer-crusher ham…

Question 16

I want to build a 300 tph limestone aggregate line. Is the PE jaw + PF impact combination recommended by Shandong Lianbang reasonable?

Accepted Answer

For limestone (medium-soft), PE jaw + PF impact is a classic, cost-effective combination. We recommend PE900×1200 (220-450 tph) as primary crusher and PF1315 (130-280 tph) as secon…

Question 17

We mainly crush limestone for cement raw meal. A friend recommended a hammer crusher. Can PC hammer crusher handle this?

Accepted Answer

The PC hammer crusher is very suitable for primary or medium crushing of limestone in cement plants. The PCX heavy hammer crusher can even reduce large limestone directly to mill-f…

Question 18

My raw material is medium-hard limestone with some shale. Is a impact crusher suitable?

Accepted Answer

Limestone and shale are medium-hard, brittle materials ideally suited to PF impact crushers. We recommend PF1315 (130-280 tph) or PF1214 (100-200 tph) to produce well-cubical aggre…

Question 19

Do I need to equip VSI highefficiency vertical shaft impact sand making machine in my quarry crushing line from Shandong Lianbang Heavy Industry?

Accepted Answer

VSI series highefficiency vertical shaft impact crusher from Shandong Lianbang Heavy Industry is speciallydeveloped energysaving sandmaking equipment, suitable for material wit…

Question 20

Should I choose stationary crushing production line or wheeltype mobile crushing plant from Shandong Lianbang Heavy Industry for my quarry project?

Accepted Answer

Shandong Lianbang Heavy Industry supplies both stationary full crushing lines and wheeltype mobile crusher plants. Our mobile crushing station adopts allwheel drive, convenient r…

Question 21

When processing different quarry materials such as granite, basalt or limestone, how do I choose between jaw crusher, cone crusher and impact crusher ？

Accepted Answer

PE series jaw crusher is for coarse crushing for material under 320 MPa compressive strength. CS / PY cone crusher fits mediumhard & superhard rock secondary crushing. PF impact …

Question 22

What certifications and standards should I verify before importing a complete stone crushing production line, and how does Shandong Lianbang Heavy Industry meet them?

Accepted Answer

Before importing a stone crushing production line, buyers should confirm that the supplier holds ISO 9001 quality management certification, that machines meet CE Machinery Directiv…

Question 23

For the primary crushing stage, should I choose a jaw crusher or a cone crusher?

Accepted Answer

For primary crushing, the jaw crusher is the preferred choice. The jaw crusher is suitable for coarse crushing of materials of all hardness levels, accepts large feed sizes (up to …

Question 24

What certifications and standards should I verify before importing a complete stone crushing production line, and how does Shandong Lianbang Heavy Industry Co.,Ltd meet them?

Accepted Answer

Before importing a stone crushing production line, confirm ISO 9001 certification, plus full English technical documentation. Shandong Federal Heavy Industry provides ISO 9001, mat…

Question 25

What risks should I pay attention to when purchasing a stone crusher for my quarry, and how can Shandong Lianbang Heavy Industry Co.,Ltd help me avoid them?

Accepted Answer

As a buyer, the main concerns when purchasing a stone crusher are quality, application fit, safety, delivery and compliance. At Shandong Lianbang Heavy Industry Co.,Ltd we help you…

Question 26

Will the actual output of FG Spiral Sand Washer, YK Screen and PC Crusher differ from the catalog parameters?

Accepted Answer

Catalog rated data is obtained under ideal standard test conditions. Actual throughput will vary subject to raw material hardness, feed size, mud & moisture content, power supply s…

Question 27

What is a complete stone crushing production line and how does it work?

Accepted Answer

A complete crushing production line processes raw rock into sized aggregates and manufactured sand through a staged flow: feeding → primary crushing (jaw crusher) → secondary crush…

Question 28

Jaw crusher vs Cone crusher, which one should be chosen for coarse crushing?

Accepted Answer

For coarse crushing, jaw crushers are preferred. Jaw crushers are suitable for coarse crushing of various hard materials, with large feed particle size (up to 1500mm or more), simp…

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FAQ & Knowledge Answers

Questions & Answers

Do I need to equip VSI highefficiency vertical shaft impact sand making machine in my quarry crushing line from Shandong Lianbang Heavy Industry?

Have a Project Requirement?

FAQ & Knowledge Answers

Questions & Answers

Do I need to equip VSI highefficiency vertical shaft impact sand making machine in my quarry crushing line from Shandong Lianbang Heavy Industry?

Have a Project Requirement?

Do I need to equip VSI highefficiency vertical shaft impact sand making machine in my quarry crushing line from Shandong Lianbang Heavy Industry?