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During the crushing process, raw material characteristics are one of the key factors influencing product particle size. Their physical and chemical properties directly affect the crushing difficulty, crushing method, and particle distribution. This article will analyze the impact of raw material characteristics on product particle size from six key perspectives and provide strategies for addressing this impact. IV. Feed Particle Size Composition Influencing Mechanism Excessive proportion of coarse particles in the feed (e.g., 300mm particles >30%) Frequent overloading of the jaw crusher causes the discharge opening to expand momentarily, resulting in fluctuations in the coarse crushed product particle size (e.g., from ≤200mm to ≤250mm). Uneven feeding of the secondary crushing equipment (e.g., cone crusher) impairs the lamination crushing effect, and the proportion of 50mm particles in the product increases by 15%. Overly uniform feed particle size (e.g., 80% 100-150mm) This can easily lead to “single-particle crushing” during crushing, resulting in a low fine particle content (10mm particles <20%) and low energy efficiency. Countermeasures 1. Pre-screening to control feed gradation Install a fixed grating (300mm aperture) before coarse crushing to remove oversized particles (>500mm) and prevent clogging. Before secondary crushing, use a vibrating screen (e.g., with an 80mm mesh) to separate...
During the crushing process, raw material characteristics are one of the key factors influencing product particle size. Their physical and chemical properties directly affect the crushing difficulty, crushing method, and particle distribution. This article will analyze the impact of raw material characteristics on product particle size from six key perspectives and provide strategies for addressing this impact. I. Hardness and Compressive Strength Influence Mechanism Higher hardness (e.g., Mohs hardness ≥ 6) Requires greater crushing force, resulting in a coarser product particle size under the same equipment parameters and increased equipment wear (e.g., jaw plate and hammer wear rates increase by over 30%). Low-hardness ores (e.g., fluorite with a Mohs hardness of 4) Lower crushing energy consumption tends to produce fine particles, but insufficient crushing force may lead to uneven particle size distribution. Countermeasures 1. Equipment Selection to Match Hardness High-hardness ores (e.g., iron ore): A cone crusher (laminated crushing, high crushing force) is preferred. The discharge opening can be set to 15-30mm, and a fine-crushing cone crusher can be used to achieve a particle size of ≤10mm. Low-hardness ores (e.g., fluorite): An impact crusher (impact crushing, high fines content) can be used. Increase the rotor speed to 1500 rpm and...
The quartz stone beneficiation process is mainly purification, removing small amounts of or trace impurities in quartz sand, and obtaining refined quartz sand or high-purity quartz sand, which is a highly difficult separation technology. Today, the editor will share with you the quartz stone beneficiation and purification process. 1. Crusher: Use a jaw crusher to crush the quartz to 100-150 mm. Secondary Crushing: Use a cone crusher or impact crusher to further crush it to 20-50 mm. 2. Grinding: Use a rod mill or ball mill to grind the quartz to 1-5 mm. Fine Grinding: Grind it to 0.1-0.5 mm for subsequent sorting. 3. Ore Dressing 3.1 Jig Gravity Separation Jig: Separates dense impurities such as feldspar and mica. Shaker: Further separates fine impurities. 3.2 Dry and Wet Magnetic Separation Dry magnetic separation: Removes magnetic minerals such as iron. Wet magnetic separation: Used for fine-grained quartz to further remove magnetic impurities. 3.3 Flotation Chemicals: Use collectors and frothers to separate quartz from feldspar, mica, etc. Equipment: Flotation machine. 3.4 Pickling Acid: Use hydrochloric acid or sulfuric acid to remove metal oxides such as iron. Reaction: Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O 4....
Iron ore mining generally consists of the following five stages. 1. Exploration Stage Iron ore mining begins with prospecting. Through geological surveys and ore deposit assessments, the specific location and method of mining are determined. 2. Preprocessing Stage Pre-processing is required before mining, primarily including geological exploration, mineral processing tests, and economic evaluations. Geological exploration further determines the size, quality, morphology, and distribution of the ore body. Mining tests determine the most appropriate mineral processing method. Economic evaluation confirms the economic benefits of iron ore mining. 3. Mining Stage Iron ore mining primarily involves open-pit mining and underground mining. Open-pit mining involves mining ore directly on the surface and is suitable for high-yield, shallow-bodied ores. Underground mining, on the other hand, involves mining underground and is suitable for lower-yield, deeper-bodied ores. 4. Processing Stage After mining, the ore undergoes processing, including crushing, screening, grinding, and flotation. Grinding and flotation are the core steps in iron ore processing, removing impurities from the ore and converting it into iron roasted stone powder. 5. Transportation Stage Processed iron ore powder needs to be transported by train, ship, or road to steel mills for smelting. Trains are the primary mode of transport for...
How is iron tailings treated? Read on: 1. Secondary separation to recover iron concentrate: Iron concentrate can be recovered through secondary separation of iron tailings. 2. Construction material production: Iron tailings can be used as a raw material and mixed with other raw materials to produce building materials such as concrete and bricks. 3. Mine reclamation: Backfilling treated iron tailings into mine voids helps restore the mine’s ecological environment. 4. Backfill material: Iron tailings can be used as backfill material to fill voids in underground mines after mining, improving pillar stability and preventing mine accidents. 5. Road materials: Iron tailings can be used to produce road materials such as asphalt concrete and cement concrete. Can iron ore tailings be used to make sand? Yes. Phase 1: Coarse Crushing of Iron Ore Large iron ore is evenly fed from a silo by a vibrating feeder and conveyed to a jaw crusher for coarse crushing. After coarse crushing, the iron ore is screened by a vibrating screen and then conveyed by a belt conveyor to an impact crusher or cone crusher for secondary or fine crushing. If the iron tailings are smaller in size, they can be directly fed to the secondary...
There are numerous crusher manufacturers on the market, each with different selling points. How do you choose a sand making machine manufacturer? This article analyzes Shengbang Machinery’s mobile crushers. Shengbang Machinery offers three main types of mobile crushing stations: tire-mounted mobile crushers, crawler-mounted mobile crushers, and modular mobile crushing stations. Advantages of Tire-Mounted Mobile Crushing Stations Customized Main Unit All main units are custom-developed specifically for mobile crushing stations, offering reliable performance, high output, high energy efficiency, and easy maintenance and adjustment. They are also simple to operate and maintain. Modular Design The overall modular design provides strong interchangeability. When an order is placed, the station can be quickly assembled into the desired mobile crushing station model, reducing production cycles and meeting customer needs for fast delivery. Loose Oil Self-Lubrication The vibrating screen uses thin oil self-lubrication, providing excellent lubrication and a long maintenance cycle. Lubricant changes are only required every eight months, saving lubricant and labor costs. No Foundation Installation All components are fully onboard, eliminating the need for disassembly during transportation and eliminating on-site installation. The intelligently designed adjustable fixed legs also eliminate the need for foundation installation. Convenient and Flexible No external conveyor belts are required, eliminating...
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