The action came after Union Steel Minister Chaudhary Birender Singh inspected the accident site on Wednesday.
Singh also visited the injured in Jawaharlal Nehru Hospital in Bhilai, around 35 km from Chhattisgarh capital Raipur.
The Minister said an inquiry committee will investigate the incident and submit its report within a week.
Addressing media persons, the minister said the new technology would be introduced to prevent recurrence of such incidents.
The explosion occurred around 10.30 a.m. on Tuesday during maintenance work.
Sources said over a dozen persons injured in the blast have been admitted to the intensive care unit of Bhilai's Sector 9 hospital.
The bodies of seven victims have been identified while DNA tests are being conducted to ascertain the identity of the remaining victims, sources said.
(With inputs from agencies.)