Petro Carbon And
Chemicals Limited

Tamping Paste

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Overview

Tamping Paste, also referred to as Ramming Paste or Lining Paste, is a carbonaceous lining material used in Submerged Arc Furnaces (SAF). When heated, the paste becomes workable and is applied over the refractory lining to form a dense, joint-free layer. Consistent quality and controlled application of tamping paste are critical for achieving effective thermal insulation and extended furnace lining life.

Applications

Tamping Paste is used across the Ferro Alloys and Allied Industries for lining and insulating furnace shells. It is applied between the refractory lining and the furnace casing, where it functions as a protective and insulating layer, reducing heat loss and enhancing the overall operational stability of the furnace.

Manufacturing Process

The manufacturing process of Tamping Paste follows a controlled carbon paste production methodology, similar to Electrode Carbon Paste (CEP), with design modifications specific to furnace lining requirements. The process includes:

  • Selection and processing of carbonaceous materials
  • Controlled use of soft pitch as a binder
  • Optimized particle size distribution for effective compaction
  • Lower binder content compared to CEP to improve thermal insulation
  • These parameters ensure consistent performance under demanding furnace operating conditions.

Quality Parameters

  • Designed to provide efficient thermal insulation for furnace pots
  • Low binder content to enhance heat resistance and minimize volatilization
  • Requires pre-heating prior to application for proper workability
  • Forms a dense, compact, and crack-free lining when correctly tamped
  • Working temperature during tamping is a key performance factor- Recommended tamping temperature: 130°C – 150°C
Specification for ECA based Carbon Tamping Paste
Sl.No Specifications Unit ECA based Carbon Tamping Pastes for Cathode lining
1.
Plasticity
%
8 to 30
2.
Fixed Carbon
%
>79
3.
VM
%
<16
4.
Ash
%
6(max)
5.
Apparent Density
gm/cc
1.6
6.
Electrical Resisitivity
Ohm-meter
90 (max)
7.
Compressive strength
Kg/sqcm
200 (min)
8.
Binder
%
10 to 15
9.
Shape
Briquette Shape- 100*60*90 mm
10.
Qty for 4 furnaces
MT
12
11.
Packaging
Bags
50 Kgs each