Managing raw material quality control in steel manufacturing

Improve raw material quality for more consistent product

Precise feeding of process materials is critical to maintaining product quality, but measuring and ensuring steel raw material quality control can be challenging. We offer belt scales with a range of conveyor speeds and levels of accuracy. Our weighbelt feeders provide a consistent flow for blending or batching, from light materials at low feed rates to heavy-duty loads requiring faster feeds. Our online elemental analyzer helps monitor and control sintering process fluctuations, inhomogeneous mixtures, and other parameters that affect productivity, physical and metallurgical quality, and raw material consumption and costs.

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Products for monitoring raw materials in steel manufacturing

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Why sinter feed composition control matters

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Sinter is the primary feed material for making iron in a blast furnace. Sinter is created by mixing iron ore concentrate with several additives such as limestone and silica to control the chemistry and then igniting it at 1200°C in a continuous belt-fed furnace.

Sinter feed composition control is important because the various sinter feed materials are not perfectly characterized and their chemical makeup varies within a batch and between batches. 

As the raw feed material chemistry changes, the additive feed rates should be adjusted to smooth out these variations in the sinter strand feed chemistry.

The basicity of sinter feed material is an important parameter in the efficient operation of the sintering and iron making process. Basicity is a calculated chemical parameter composed of the ratio of two or more elements that are known to affect the alkalinity of the material. Stabilization of the basicity of the sinter product delivers benefits not only to the sinter operations but to the downstream iron making process.

The CB Omni Online Elemental Analyzer can help control the sinter feed basicity and provide a more consistent feed to the sinter strand. The benefits of real-time chemical analysis data provided by the CB Omni analyzer include:

  • More consistent sinter product—improves sinter quality and stabilizes feed to the blast furnace
  • Increased sinter strand and blast furnace throughput due to reduced sinter product variability
  • Decreased return fines lowers material handling costs
  • Reduced load on laboratory, allowing capacity to be used elsewhere without incurring additional costs
  • Net reduction in cost per ton of sinter production

To learn more, read the application note Application of On-line Elemental Analysis for Control of Sinter Feed Basicity

The CB Omni analyzer uses Prompt Gamma Neutron Activation Analysis (PGNAA) or Pulsed Fast Thermal Neutron Activation (PFTNA) to determine elemental concentration in bulk materials. The method is deeply penetrative and measures through many centimeters of material making it an ideal technology for real-time elemental analysis of bulk materials on conveyor belts.

To learn more about PGNAA and PFTNA, visit the PGNAA and PFTNA Technology page.

Ensure raw material quality control with Thermo Scientific conveyor belt scale systems

Belt conveyer scales are an important part of a mining operation’s bulk material handling system. A belt scale system monitors production output and inventory, or regulates product loadout, while providing vital information for the effective management and efficient operation of your business. There are many options to consider when selecting a belt scale system for bulk material handling. How do you know which one is right for your application?
Check out the Belt Scale Selection Guide