In modern industrial processes of dry dust collection in industrial, waste/exhaust gases are used bag fabric filters, which are capable of ensuring efficiency of > 99.9%, to meet environmental requirements. Moreover, their introduction involves less capital costs and smaller production mounting areas.
Sulfur oxides (SO₂, and in smaller quantities SO₃) is one of the largest and most difficult-to-clean air pollutants, and formed by their combination with water vapor acid (H₂SO₃ and H₂SO₄) cause the destruction of metal structures and building materials.
The greatest current interest is the use of technologies of gas desulphurization of dust air flow, which is capable of ensuring the effective (>90%) binding of sulfur dioxide. The relevance of SO₂ emission reduction is defined as the expansion of electricity generation using pulverized fuel and an increase in the share of coal in the balance of metallurgical industries.
One of the most effective methods is a method of semi-dry desulphurization, created and implemented based on the use of technological schemes and equipment manufactured by “BMZ  “Progress”.

The essential advantage of this dust-leaning and desulphurization method are the following:
– low capital cost and easy installation;
– light maintenance and repair, if necessary;
– no waste water;
– high reliability;
– possibility of implementing of automatic process control;
– low power consumption;
– the end product: a mixture of calcium salts and agglomerate dust or boiler external ash.
In the process of developing a set of processing equipment, performed a complex modeling of aerodynamic parameters of dust and gas flows in the adsorbing reactor; determination of the residence time of reagent in different geometrical variations, dimensions and shapes under conditions of changing flow volume and flow velocity profiles on the basis of the following criteria: availability of adsorbent, compliance with the emission limit values of CO₂concentrations in waste gases, possible ways of utilization of desulphurization products, as well as the prediction of design and installation investments.
The introduction of environmentally friendly technologies for processing of iron ore requires solving important problems: disposal of sinter dust with the purpose of its usage in the production cycle to obtain the agglomerate and limitation of harmful emissions in atmosphere.