Refractory Solutions for Zinc Extraction Rotary Kilns

Contact us:

Tel/WhatsApp:0086-18905335290

Email:luming@lm-kiln.com

We provide one-stop refractory solutions for industrial kilns, from customized refractory design and material selection to the production of refractory bricks, castables, precast refractory blocks, insulation products, and refractory anchors. We also offer installation guidance and kiln dry-out support to help customers improve kiln efficiency, reduce maintenance costs, and maximize refractory service life.

The zinc extraction kiln, often referred to as a rotary kiln equipment used for zinc extraction or recovery, is primarily applied in the zinc smelting field. It is a pyrometallurgical equipment that extracts zinc from zinc-containing ores, industrial slags, or wastes through high-temperature reduction and volatilization processes, commonly known as "zinc oxide rotary kiln" or "rotary kiln zinc extraction kiln." This type of kiln has strong adaptability and large processing capacity, making it an important technology in zinc smelting, especially suitable for processing zinc oxide ores with 15%-25% zinc content or zinc-containing industrial slags (such as steel dust mud, zinc leaching slag, flue ash, etc.). Its main products are secondary zinc oxide or zinc ingots, widely used in rubber, medicine, paint, and other fields.The working principle of the zinc extraction kiln is based on the low boiling point (about 907°C) and volatility of zinc.

 

Challenges Inside a Zinc Extraction Kiln

The refractory lining is exposed to several demanding operating conditions:
1.Continuous operation at temperatures typically between 1000–1250°C
2. Strong abrasion caused by zinc-bearing dust and solid particles
3.Chemical attack from alkali compounds, chlorides and sulfates
4.Local reducing atmosphere affecting refractory stability
5.Frequent temperature fluctuations during start-up and shutdown
6. Mechanical stress from kiln rotation and material movement

 

Our Proprietary Core Technology for Zinc Extraction Kiln

 

Our Shandong Luming New Materials Technology Co., LTD has specialized in refractory materials for various types of rotary kilns for over twenty years. To address the drawbacks of traditional masonry techniques, we developed an innovative "brick-and-mortar hybrid masonry process" (Patent No.: 201010130626.6).

This construction technology has been officially included in China's national《Furnace Construction Manual》.

This masonry process innovatively combines the advantages of refractory brick laying and castable monolithic pouring, while effectively overcoming the limitations of both conventional methods.

Standardized refractory material design schemes have also been developed for different types of kilns.With field applications in over 100 rotary kilns and continuous iterative upgrades, this solution reliably meets diverse customer requirements.

 

 

01

 

The first-generation technology prioritized operational safety and efficiency, delivering secure and long-lasting rotary kiln refractories that significantly reduced maintenance frequency while maximizing equipment uptime.

 

02

 

The second-generation system integrates low-thermal-conductivity materials to achieve 30% reduction in kiln shell temperature and over 10% energy savings while maintaining the safety and longevity advantages. This breakthrough directly supports clients' energy conservation, emission reduction, and green production initiatives.

 

03

 

The current third-generation masonry technology and products utilize nanomaterials, achieving safety, longevity, energy efficiency, and environmental sustainability while further reducing the thickness of refractory materials, offering significant advantages in lightweight design.

Our Lining Installation Process----1.Marking

Marking equally spaced lines according to the calculated number of precast brick rows

Our Lining Installation Process----2.Installing Bricks According to the Marked Lines

Precast refractory bricks are arranged axially (front-to-back) along the rotary kiln, and fixed to the kiln shell by welding anchor hooks.

Our Lining Installation Process-----3.Completion of Precast Refractory Brick Installation

Image of Completed Welding of All Precast Refractory Bricks in Rotary Kiln

Our Lining Installation Process----4. Welding Anchor Hooks Between Precast Refractory Bricks

Welding anchor hooks between precast refractory bricks to provide fixed support for the castable material poured between them.

Our Lining Installation Process-----5.Laying Insulation Materials

After welding the anchor hooks between the precast refractory bricks, lay the insulation materials

Our Lining Installation Process------ 6. Casting Castable Refractory Between Precast Bricks

After the insulation materials have been fully laid, proceed with casting castable refractory in the casting zones.

Photos During Masonry and After Full Completion

 

 

 

Solid Waste and Hazardous Waste Rotary Kiln:

Zinc Oxide Volatilization Kiln;Medical Hazardous Waste;Chemical Hazardous Waste; Municipal Sludge Drying:

Compared to Traditional Small Brick Masonry Process:

1.Cylinder temperature reduced by more than 30%

2.Fuel cost savings exceeding 10%

3.Completely eliminates brick dropping issues

4.Total refractory weight of the kiln body reduced by 10%, resulting in electricity savings of 10%

5.After 6 months of operation, the refractory cost is effectively equivalent to free usage

1.No casting zones required; castable refractory is unnecessary

2.Formed precast bricks are assembled by splicing and welded installation

3.Excellent thermal insulation performance

4.Secure and reliable fixation with no risk of brick loosening or dropping

Front-to-back welded assembly enables rapid splicing and high construction efficiency

1.Metallurgical & Nonferrous Industry:Standard Pelletizing Rotary Kiln,Ferronickel Rotary Kiln,Ferromanganese rotary kiln,Vanadium-Titanium Rotary Kiln, Ferrochrome Rotary Kiln,Alumina Rotary Kiln,Magnesium Metal Rotary Kiln,Zinc Recovery Rotary Kiln,Iron Ore Roasting-Reduction Rotary Kiln,etc.

2.Building industry:Lime Rotary Kiln,Dolomite Calcining Kiln

3.New Energy Industry: Lepidolite Rotary Kiln,Spodumene Conversion Kiln

4.Environmental protection industry: Hazardous Waste Rotary Kiln,Hazardous Waste Rotary Kiln,Sodium Pyrophosphate Thermal Oxidizer,Sodium Pyrophosphate Thermal Oxidizer

5.Coke Oven Door Brick,Coke Dry Quenching Castable Refractory

Our company strictly adheres to national and industry standards for refractory materials in design, production, and inspection. We also comply with international standards specified by clients to meet customized requirements.Based on the principles of safety, reliability, and cost-effectiveness, we have established a comprehensive quality management system and inspection and testing system.Our internal quality control standards encompass all critical aspects: Raw material qualification,Production process monitoring, Key control point management, Equipment maintenance & inspection,Full-process quality testing & evaluation, Closed-loop quality feedback & improvement.We implement strict raw material quality control, conducting batch-by-batch inspection with full documentation to ensure consistent material compliance.During the production process, strict quality control is enforced, with every process detail rigorously monitored and inspected. A comprehensive quality management and accountability system is implemented to ensure the overall product quality is flawless.Deploy qualified and experienced project managers and professional construction teams to carry out meticulous construction, ensuring construction quality and progress, and guaranteeing timely completion with high quality and quantity.

Advanced Physical and Chemical Experimental Testing Equipment and Standardized Physico-Chemical Laboratory

 

 

 

 

 

 

 

CORPORATE ENVIRONMENT AND FACILITIES

 

Fully Automated Castable Refractory Production Line in Workshop 1

 

Precast Production Site in Workshop 1

Special Refractory Production and Firing Workshop Site

7 × 52m³ Shuttle Kilns in Special Refractory Workshop

75m Firing Tunnel Kiln in Special Refractory Workshop

Fully Automatic Glaze Spraying Equipment

1. We strictly adhere to all agreements signed with our clients and conscientiously accept the obligations therein.

2. We commit to delivering all supplied materials to the client's designated location within the specified timeframe. We also guarantee that all       product physicochemical indicators will meet the buyer's requirements. If any material is found to be non-conforming upon inspection, we will     unconditionally replace or refund it and bear all associated costs.

3.We will strictly comply with the technical requirements for all supplied products. Upon delivery, we will provide a genuine and credible "Product   Quality Certificate," "Test Report," and "Product Usage Instructions." We are also willing to accept random sampling inspections of the products by the buyer.

4.During construction, our company will dispatch professional technical personnel to the site to provide on-site tracking and support. They will offer technical guidance on the construction, furnace baking, and trial operation of the materials, promptly addressing and resolving any related issues. They will also assist the construction team with product protection and other relevant tasks.

5.For kilns constructed by our company, we are willing to provide detailed furnace drying curves.

6.Should any quality issues arise during use, we commit to being on-site within 24 hours for domestic clients in the province and within 48 hours for those outside the province upon receiving notification. For international clients, a written response will be provided within 24 hours to assist in the investigation and analysis of the issues.

7.We commit to taking responsibility for any losses caused by defects in the goods provided during the warranty period.

8.Should a product fail due to improper use by the client during the warranty period, we will actively assist with replacement, charging only for the cost of the materials.

9.Even after the warranty period expires, our company will remain actively involved in assisting with the resolution of any issues that may arise.

10.Technical personnel will conduct regular quality feedback sessions to solicit suggestions for improvement and enhance service quality.

All delivered goods are packaged in strict compliance with the buyer's requirements as well as relevant national and industry standards.Shaped products such as refractory bricks and precast blocks are typically packaged on wooden pallets, wrapped with stretch film for sealing, and secured with plastic-steel strapping.Unshaped refractory materials are packaged in 25-50kg plastic bags, with additional outer protection using bulk bags.Our company provides customized packaging solutions including containers, wooden cases, metal boxes, and moisture-proof marine packaging, fully compliant with both local regulations and corporate requirements in your market.

Our Construction Showcase

 

Some overseas project

steel plant

Rotary kiln major overhaul

Rotary kiln Construction

coke oven

Custom Refractory Materials 

ISO

ISO1400

ISO4500

Authorized invention patent

Authorized invention patent

Utility model patents

Utility model patents

Design patents

Provincial-Level Enterprise Technology Center

Qualification Certificate for Construction Enterprises