Novel vanadium-nitrogen microalloy and preparing method

Abstract

The invention belongs to the field of alloy treatment, and discloses a novel vanadium-nitrogen microalloy and a preparing method thereof. The novel vanadium-nitrogen microalloy comprises, by mass, 100parts of a vanadium compound, 24-39 parts of a novel biochar reducing agent, 1-3 parts of ammonium bicarbonate or ammonium chloride and 0.1-2 parts of a density strength agent. The preparing method comprises the steps that the vanadium compound is ground through a pulverizer; the novel biochar reducing agent and the ground vanadium compound are mixed, then, the density strength agent, the ammonium bicarbonate or the ammonium chloride and the water are added, and uniform mixing is conducted according to a certain proportion; and the mixture is pressed and formed. Compared with a previous vanadium-nitrogen microalloy and a preparing method thereof, the curing and reducing speed is increased, the problems about product ball exploding, ball cracking and ball adhering are solved, the product quality is improved, meanwhile, the damage rate of a kiln is reduced, the kiln maintaining cost is saved, and accordingly the production cost is greatly reduced.

Description

technical field [0001] The invention belongs to a method for preparing a metal formula, and relates to a method for producing a novel vanadium-nitrogen microalloy and its preparation method. Background technique [0002] Currently, the closest prior art: [0003] Vanadium-nitrogen alloys are mainly used as alloy additives in the metallurgical industry. In recent years, the industry has developed rapidly. A large number of industrial-scale application data show that the addition of vanadium to steel brings benefits to steelmaking production (reducing reheating temperature, reducing transverse cracks , reduce the rolling load, reduce the influence of rolling conditions on the properties of steel, etc.), improve the properties of steel (strength, toughness, ductility, formability, weldability and wear resistance, etc.), thereby reducing costs. This cost reduction not only refers to the reduction of steel production costs, but also the reduction of manufacturing costs brought a...

AI Technical Summary

Problems solved by technology

But these methods all have shortcomings: ①expensive

②The yield is low and unstable

③Special device is required for blowing nitrogen

④ It is necessary to produce ferrovanadium first, and then solid-state nitriding to obtain ferrovanadium nitride, and the manufacturing cost is high

⑧In 2015, our company obtained the patent of "a vanadium-nitrogen microalloy additive and its preparation method", which solved some of the problems in the above-mentioned industries, but in the past, the old additives were used, and it was found in actual production that the product exploded and cracked The ball sticking problem is more serious, resulting in large loss of kiln equipment, no significant increase in product yield, high cost of special materials, resulting in high overall product cost

[0014] (1) The traditional process of preparing vanadium nitride not only requires harsh reaction equipment, high temperature strength requirements of equipment materials, high temperature environment, and long reaction cycle, resulting in low labor productivity

[0015] (2) Excessive reaction cycle causes excessive energy consumption

[0016] (3) The long-term high-temperature process will cause a lot of equipment loss

[0017] (4) The one-time investment of equipment is large, the production volume is small, and the disproportion between input and output leads to high production costs and a decline in product competitiveness

In the past, our company used the natural flake graphite 399 crystalline graphite formula in the old vanadium nitrogen microalloy and its preparation method to alleviate this problem, but the product still has the phenomenon of ball cracking and ball sticking, which leads to scaling inside the kiln. Increased loss, poor product consistency, and high overall cost

[0020] 2. The natural flake graphite 399 crystal graphite formula is used, the price is high, and it is difficult for enterprises to accept such a high production cost of special materials, and the harmful elements contained in the minerals exceed the standard, which affects the product quality and the kiln cavity is seriously scaled.

[0025] 4. In the past, the vanadium-nitrogen alloy produced by our company in the old vanadium-nitrogen micro-alloy and its preparation method had fried balls and sticky balls. The unqualified products with a product size of less than 10 mm had to return to the milling station to re-grind and then make a second batch of ingredients. Secondary sintering causes secondary processing costs

At the same time, it solves the harsh reaction conditions and long reaction cycle in the preparation process of microalloy additives, resulting in low labor productivity

The one-time investment of equipment is large, the production volume is small, and the disproportion between input and output leads to high production costs and a decline in product competitiveness.

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