The chemical kiln is a rotary reaction device specifically designed for high-temperature heat treatment processes in the chemical industry. Its core structure is a horizontal rotating cylinder (rotary kiln) lined with refractory materials. Through rotational movement, the material fully contacts high-temperature gases to achieve calcination, roasting, drying, and other chemical reactions. The equipment uses an automatic temperature control system and sealing devices to ensure the reaction process occurs under controllable temperature, pressure, and atmospheric conditions. It is widely used in the production of inorganic salts, fertilizers, chemical intermediates, and other fields. Key design principles follow temperature uniformity (±5°C), corrosion resistance, and continuous operation, meeting the chemical industry's stringent requirements for product quality and energy efficiency.
Product Applications
1. Inorganic salt production: high-temperature decomposition or calcination of calcium carbonate, barium sulfate, aluminum hydroxide.
2. Fertilizer industry: roasting activation of phosphate rock powder, conversion of potassium feldspar to water-soluble potassium.
3. Environmental protection treatment: high-temperature incineration and harmless disposal of hazardous waste (including heavy metal sludge).
4. New material preparation: oxidation reaction of titanium dioxide (chloride process), drying of lithium battery material precursors.
5. Mineral processing: oxidative roasting of limonite (additional information mentioned) to improve iron grade.
Product Features
1. Precise temperature control system: uses burner + electric heating auxiliary temperature control, temperature control accuracy ±3°C, ensuring efficient chemical reactions.
2. Enhanced corrosion resistance design: internal kiln body sprayed with special castables resistant to acid and alkali corrosion (emphasized in additional information), key parts (such as kiln mouth) protected with ceramic fiber modules, extending service life by 40%.
3. High-efficiency heat transfer structure: inclined rotary design (slope 1%-3%), combined with lifting plates (sand throwing rings), ensuring thorough mixing of materials with hot gas flow, thermal efficiency >85%.
4. Continuous operation: sealed feeding machine at the feed end + airlock valve at the discharge end, supporting 24-hour uninterrupted operation, daily processing capacity up to 50-500 tons.
5. Environmental integration: exhaust gas treated by cyclone dust collector + bag filter, particulate emissions <20mg/Nm³, compliant with GB 16297-1996 standard.
Product Functions
1. High-temperature pyrolysis: provides a reaction environment of 800°C-1250°C, causing material decomposition (e.g., calcium carbonate → calcium oxide + CO₂).
2. Solid-phase reaction: promotes mineral phase transformation (e.g., FeOOH → Fe₂O₃ in limonite).
3. Moisture removal: efficiently dries wet materials (initial moisture ≤40%), final moisture can be reduced to below 0.5%.
4. Waste gas purification: integrated waste heat boiler recovers heat (producing 0.8MPa steam), exhaust gas undergoes quenching + alkali washing to remove acidic gases.
5. Intelligent control: PLC system monitors temperature, rotation speed, oxygen content in real time, supports remote fault diagnosis.
Product Technical Parameters
Parameter Categories | Technical Specifications |
Processing Capacity | 50-500 t/d (customizable according to demand) |
Kiln Dimensions | Diameter: 2000-4000mm; Length: 20-35m |
Rotation Speed | 0.5-2 rpm (variable frequency speed regulation) |
Operating Temperature | Kiln head: 800-1000°C; Kiln tail: 1000-1250°C |
Inclination Angle | 1.5%-3% (adjustable) |
Drive Power | Main motor: 75-315kW; Auxiliary transmission motor: 15kW |
Refractory Materials | Kiln lining: high-alumina castable (thickness 150-250mm); Kiln mouth: mullite lightweight bricks + ceramic fiber modules |
Sealing Method | Labyrinth + fish scale + air curtain sealing (leakage rate <5%) |
Environmental Indicators | Particulates <20mg/Nm³; SO₂ <100mg/Nm³; NOx <200mg/Nm³ |
Note: The above parameters are based on the general design standards for chemical kilns (e.g., "HG/T 20522-2015 Chemical Rotary Kiln"). Specific configurations need to be customized according to material characteristics (such as corrosiveness, reaction temperature), production capacity requirements, and environmental protection demands. Key components (such as burners, reducers) can be optionally equipped with international brands (Siemens, SEW) to further enhance reliability.
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