Suzhou Mianrui Electronic Technology Co., Ltd. specializes in the R&D, application and production of Electromagnetic Micro-Acoustic (EMMA) identification technology and metallurgical intelligent systems. We are one of the few enterprises with the complete R&D chain of device simulation design, process manufacturing, reader manufacturing and antenna design.
Our technology originates from the Surface Acoustic Wave (SAW) research group of Shanghai Jiao Tong University. Core team members come from SJTU, KIT Germany, the University of Freiburg and Chiba University Japan, with over 20 years of research and more than 10 national and provincial projects. The high-temperature SAW chip has been developed over 16 years and applied in production for 8 years, deployed in 43 steel plants.
With fully independent core technologies and intellectual property, Mianrui holds 15 granted invention patents and has won awards such as the Jinji Lake Dual-Hundred Talent Program and Technology Leading Talent. We serve 50+ metallurgical enterprises including Baowu, Yonggang, Zhanjiang Steel, Longmen Steel and Xingcheng Special Steel.
Perceive every degree of heat across the full process
EMMA-ID recognition, long-term stable at 350℃, accuracy 99.9%+
→Converter & LF refining AI model suite, saving about 4.37 CNY per ton of steel
→Full-life digital control of copper slag cooling yards, eliminating ladle "explosion" risks
→Short-pulse radar positioning with 8cm accuracy, full-process material tracking
→EMMA-ID Series · High-temperature Container Sensing & Positioning
EMMA-ID based recognition of ladles, hot metal ladles, tundishes, scrap buckets and slag pots at high temperature, accuracy up to 100%
View DetailsFull-process control across converter-refining-continuous casting with ladles, cranes and materials tracked digitally
View DetailsFull-cycle hot metal ladle control: less temperature drop, higher turnover, stable charging temperature, JIT at the iron-steel interface
View DetailsConverter & LF refining AI model suite with closed-loop slagging, blowing, endpoint, alloying, heating and stirring - saving 26.22M CNY/year (4.37 CNY per ton)
View DetailsFor copper smelting slag cooling yards: smart bucket tracking, cooling control and dispatch, eliminating "explosion" risks at the source
View DetailsWireless passive sensing + AI diagnosis: prevent major failures, reduce unplanned downtime, extend equipment life
View DetailsProven across leading steel plants and non-ferrous smelters

One-click steelmaking · 39 ladles stable for 7 years

Smart dispatch · semi-autonomous scheduling

Ladle smart control · 8cm crane positioning
Hot metal tracking & dispatch

Copper slag dispatch · digital cooling yard

Copper slag smart management deployed
A "second brain" for steel plants - perceptible, simulatable, collaborative, evolvable.










Trusted by 50+ metallurgical enterprises since 2018
Two decades of SAW research, from laboratory to 43 steel plants
Siemens successfully develops SAW RFID technology for high-speed railway identification
Shanghai Jiao Tong University begins SAW technology research
Siemens' micro-acoustic team is sold and later dissolved; Austria's CTR company runs the first steel ladle ID trial with the technology
Our team receives 3 consecutive NSFC grants, researching micro-acoustic theory, piezoelectric materials and EDA simulation software
A Baowu steel plant runs the first SAW RFID trial in its "one-click steelmaking" project
First-generation products installed on 39 ladles in the No.1 steelmaking plant of a Baowu plant
Second-generation products developed and installed on 110 hot metal ladles at Jiangsu Yonggang
Third-generation products developed; tag housing uses aviation-grade materials to withstand molten steel splash
System runs stably for 2 years; fully deployed across No.1/2/3 steelmaking and EAF plants at Jiangsu Yonggang Group
Ladle ID at Baosteel Zhanjiang steelmaking plant adopts this technology
After 2 years of stable operation, reliability recognized by the owner; EMMA-ID technology officially promoted in the steel industry
Full EMMA product line successfully deployed at 45+ steel plants and nearly 10 non-ferrous companies nationwide, earning unanimous industry acclaim
After 15 years of high-temperature micro-acoustic chip R&D, the team keeps driving the technology into new scenarios and fields, incubating the steel-industry industrial agent "Gangling", striding toward higher, farther and stronger goals
Witness breakthroughs, follow industry trends