March 13, 2024

Launch of First Domestic Sales of TSCi, a High-Efficiency Carbon Injector forElectric Furnace Steelmaking

Taiyo Nippon Sanso Corporation (Headquarters: Shinagawa-ku, Tokyo; President: Kenji
Nagata; hereinafter “TNSC”), a Japanese industrial gas business company in the Nippon
Sanso Holdings Group, has launched sales of Tallman Supersonic Carbon Injector(TSCi), a high-efficiency particle injector for use in the electric furnace steelmaking
process. TSCi can reduce the quantity of carbon injected and electric energy used bysteelmakers, and thereby contributes to the reduction of CO2 emissions.

Shroud air

Transport air

Carbon + carrier air

Figure 1 TSCi External Appearance

1. Background of sales
In the electric furnace steelmaking process, carbon injectors are used in many furnaces
to adjust the molten steel composition. Formerly, carbon was blown directly onto themolten steel through a pipe in front of the furnace. In recent years, however, mostcompanies have adopted a method of injection through the wall of the furnace toenhance the safety of operators and alleviate the workload. The new process involves
issues of dust collection loss and a drop in carbon use efficiency. To solve them, TNSC
launched sales of TSCi manufactured by Canada-based Tallman Technologies Inc.

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2. Outline of technology
Carbon used in the electric furnace steelmaking process is blown into the furnace bymeans of a lance pipe with a single-hole nozzle attached to the furnace wall.
Immediately after injection, however, the carbon decelerates and diffuses, causing dust
collection loss and a decline in the efficiency of carbon use. To address these issues, theTSCi has two types of air blowers: a nozzle for transporting carbon (transport nozzle)
and a ring-type nozzle to curtail the damping of speed (shroud). This suppresses thedeceleration and diffusion of the carbon blown out with an initial speed of Mach 2, andachieves a highly efficient injection onto the molten steel. This technology demonstrates
a high injection performance not only for CDQ coke, which is used in Japan and has
comparatively large particles, but for biocoke, which has good prospects for widespreaduse going forward for attainment of carbon neutrality (CN).
TSCi has been delivered to many companies in the United States and other countries.
To utilize TSCi by companies in Japan, which use mainly CDQ coke as sources ofcarbon, TNSC took steps to reduce machine wear, and demonstrated a good durability.

Shroud air

Shroud air

Carbon + transport air
Great diffusion and speed
damping immediately afterinjection because there is nothing
on the periphery of the central jet
flow

Carbon + transport air+ shroud air
Curtailment of diffusion and speed
damping by enclosing the central jet
flow with shroud air

Figure 2 Schematic Diagrams of Jet Flow (left: single-hole lance pipe, right: TSCi)

3. Effects of introduction
In operations using smokeless coal and petroleum-derived coke as sources of carbon, it
was confirmed that TSCi reduced the amount of carbon injected from the furnace wallby 20% and the charge carbon injected with ironscrap by 32%. Through subsequent
optimization of the operation, the company reduced the charge carbon injection by up
to 85% as compared to the previous operation without TSCi. It was also confirmed thatthe high carbon injection performance increased the speed of slag formation, and2reduced the prime units of power consumption by 3% and the iron oxide content of theslag by 3%.
Even in operations in Japan using ordinary CDQ coke and crushed coal as carbon
sources, it was confirmed that TSCi decreased the quantity of injected carbon by atleast 20%.

To help to build a CN society, TNSC is striving to reduce CO2 emissions at customer
facilities through products that contribute to the environment. In the future, we arecommitted to continued contribution to CN attainment by customers, by combining newtechnologies created by open innovation.

The Nippon Sanso Holdings Group is the world's fourth-largest supplier of industrial, electronic, and medical gases,
operating in four geographic regions - Japan, U.S., Europe and Asia & Oceania - covering over 30 countries andregions. In addition, the Thermos business supplies THERMOS branded products to more than 120 countries
worldwide. Since its foundation as Nippon Sanso Ltd. in 1910, the group stands for creating social value throughinnovative gas solutions that increase industrial productivity, enhance human well-being and contribute to a moresustainable future. With more than 19,000 employees, together, we are “The Gas Professionals” and we all have thesame goal: “Making life better through gas technology”

Public Relations
Nshd.Info@nipponsanso-hd.co.jp

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