CN102212679A - Method for recycling acid regeneration iron powder pressed balls - Google Patents

Abstract

The invention discloses a method for recycling acid regeneration iron powder pressed balls, and belongs to comprehensive utilization of the steel making field. The method is characterized by comprising the following steps of: mixing 50 to 70 mass parts of acid regeneration iron powder and 50 to 30 mass parts of dust removing ash uniformly, adding 3 to 8 mass parts of MgCl2 solution, mixing uniformly, performing extrusion forming on a roll ball press, and adding the formed iron balls into an electric furnace for smelting. By the method, the metal yield is improved, the acid regeneration iron powder is utilized, the dust removing ash is also utilized, and meanwhile, the consumption of chromium-nickel alloy in the steel making process is reduced, so that the production cost of stainless steel is reduced.

Description

The method that a kind of acid regeneration iron powder pressure ball is recycled

Technical field

The present invention relates to the method that a kind of acid regeneration iron powder pressure ball is recycled, it belongs to the comprehensive utilization of field of steel-making.

Background technology

Acid regeneration iron powder (ρ _{The pine dress}=0.41～0.45 g/cm ³) physical and chemical performance, see Table 1,2.As seen from table, the regeneration iron powder contains higher Cr 7.94%, Ni 4.45%, utility value height, but fine size (90% above granularity is less than 0.180 mm), and proportion is little, directly adds electric furnace and uses, and very easily produces dust pollution, and recovery rate of iron is low.

The main chemical constitution wt% of table 1 acid regeneration iron powder

TFe	Cr	Ni	S	P	Si
						54.13	7.94	4.45	0.337	0.032	＜0.1

Table 2 acid regeneration iron particle size distributes

Material level/mm	0.250-0.180	0.180-0.150	0.150-0.097	0.097-0.088	0.088-0.074	＜0.074
							wt%	9.53	29.75	29.30	9.04	3.14	19.06

Summary of the invention

In order to improve the comprehensive utilization of waste materials rate, the invention provides the method that a kind of acid regeneration iron powder pressure ball is recycled.

After the acid regeneration iron powder mixed by 50-70 mass fraction, dedusting ash 50-30 mass fraction proportioning, add the bittern (MgCl of 3-8 mass fraction ₂Solution) solution mixes, and by the extrusion molding of pair roller ball press, the iron ball after the moulding adds electrosmelting.

The present invention has improved recovery rate of iron, by the moulding of acid regeneration iron powder pressure ball, adds the electric furnace utilization, not only the acid regeneration iron powder is utilized, and dedusting ash also obtained utilization, reduce the usage quantity of the wipla of steelmaking process simultaneously, thereby reduced the stainless steel production cost.

Embodiment:

Embodiment:

1) with the batching process stirrer mixing of acid regeneration iron powder by 70 mass fractions, dedusting ash 30 mass fractions;

2) bittern of interpolation 5 mass fractions, mixing;

3) by adding electrosmelting after the extrusion molding of pair roller ball press.

Claims (1)

1. the method recycled of an acid regeneration iron powder pressure ball after it is characterized in that the acid regeneration iron powder mixed by 50-70 mass fraction, dedusting ash 50-30 mass fraction proportioning, is added the MgCl of 3-8 mass fraction ₂Solution mixes, and by the extrusion molding of pair roller ball press, the iron ball after the moulding adds electrosmelting.